Update tikv client version and add one PC support

64 files changed, 3880 insertions, 1584 deletions

diff --git a/weed/shell/command_cluster_check.go b/weed/shell/command_cluster_check.go
new file mode 100644
index 000000000..e363239e7
--- /dev/null
+++ b/weed/shell/command_cluster_check.go
@@ -0,0 +1,249 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/cluster"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandClusterCheck{})
+}
+
+type commandClusterCheck struct {
+}
+
+func (c *commandClusterCheck) Name() string {
+	return "cluster.check"
+}
+
+func (c *commandClusterCheck) Help() string {
+	return `check current cluster network connectivity
+
+	cluster.check
+
+`
+}
+
+func (c *commandClusterCheck) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	clusterPsCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	if err = clusterPsCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	// collect topology information
+	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv, 0)
+	if err != nil {
+		return err
+	}
+	fmt.Fprintf(writer, "Topology volumeSizeLimit:%d MB%s\n", volumeSizeLimitMb, diskInfosToString(topologyInfo.DiskInfos))
+
+	emptyDiskTypeDiskInfo, emptyDiskTypeFound := topologyInfo.DiskInfos[""]
+	hddDiskTypeDiskInfo, hddDiskTypeFound := topologyInfo.DiskInfos["hdd"]
+	if !emptyDiskTypeFound && !hddDiskTypeFound {
+		return fmt.Errorf("Need to a hdd disk type!")
+	}
+	if emptyDiskTypeFound && emptyDiskTypeDiskInfo.MaxVolumeCount == 0 || hddDiskTypeFound && hddDiskTypeDiskInfo.MaxVolumeCount == 0 {
+		return fmt.Errorf("Need to a hdd disk type!")
+	}
+
+	// collect filers
+	var filers []pb.ServerAddress
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+		resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+			ClientType: cluster.FilerType,
+			FilerGroup: *commandEnv.option.FilerGroup,
+		})
+
+		for _, node := range resp.ClusterNodes {
+			filers = append(filers, pb.ServerAddress(node.Address))
+		}
+		return err
+	})
+	if err != nil {
+		return
+	}
+	fmt.Fprintf(writer, "the cluster has %d filers: %+v\n", len(filers), filers)
+
+	// collect volume servers
+	var volumeServers []pb.ServerAddress
+	t, _, err := collectTopologyInfo(commandEnv, 0)
+	if err != nil {
+		return err
+	}
+	for _, dc := range t.DataCenterInfos {
+		for _, r := range dc.RackInfos {
+			for _, dn := range r.DataNodeInfos {
+				volumeServers = append(volumeServers, pb.NewServerAddressFromDataNode(dn))
+			}
+		}
+	}
+	fmt.Fprintf(writer, "the cluster has %d volume servers: %+v\n", len(volumeServers), volumeServers)
+
+	// collect all masters
+	var masters []pb.ServerAddress
+	for _, master := range commandEnv.MasterClient.GetMasters() {
+		masters = append(masters, master)
+	}
+
+	// check from master to volume servers
+	for _, master := range masters {
+		for _, volumeServer := range volumeServers {
+			fmt.Fprintf(writer, "checking master %s to volume server %s ... ", string(master), string(volumeServer))
+			err := pb.WithMasterClient(false, master, commandEnv.option.GrpcDialOption, func(client master_pb.SeaweedClient) error {
+				pong, err := client.Ping(context.Background(), &master_pb.PingRequest{
+					Target:     string(volumeServer),
+					TargetType: cluster.VolumeServerType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	// check between masters
+	for _, sourceMaster := range masters {
+		for _, targetMaster := range masters {
+			if sourceMaster == targetMaster {
+				continue
+			}
+			fmt.Fprintf(writer, "checking master %s to %s ... ", string(sourceMaster), string(targetMaster))
+			err := pb.WithMasterClient(false, sourceMaster, commandEnv.option.GrpcDialOption, func(client master_pb.SeaweedClient) error {
+				pong, err := client.Ping(context.Background(), &master_pb.PingRequest{
+					Target:     string(targetMaster),
+					TargetType: cluster.MasterType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	// check from volume servers to masters
+	for _, volumeServer := range volumeServers {
+		for _, master := range masters {
+			fmt.Fprintf(writer, "checking volume server %s to master %s ... ", string(volumeServer), string(master))
+			err := pb.WithVolumeServerClient(false, volumeServer, commandEnv.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
+				pong, err := client.Ping(context.Background(), &volume_server_pb.PingRequest{
+					Target:     string(master),
+					TargetType: cluster.MasterType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	// check from filers to masters
+	for _, filer := range filers {
+		for _, master := range masters {
+			fmt.Fprintf(writer, "checking filer %s to master %s ... ", string(filer), string(master))
+			err := pb.WithFilerClient(false, filer, commandEnv.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+				pong, err := client.Ping(context.Background(), &filer_pb.PingRequest{
+					Target:     string(master),
+					TargetType: cluster.MasterType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	// check from filers to volume servers
+	for _, filer := range filers {
+		for _, volumeServer := range volumeServers {
+			fmt.Fprintf(writer, "checking filer %s to volume server %s ... ", string(filer), string(volumeServer))
+			err := pb.WithFilerClient(false, filer, commandEnv.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+				pong, err := client.Ping(context.Background(), &filer_pb.PingRequest{
+					Target:     string(volumeServer),
+					TargetType: cluster.VolumeServerType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	// check between volume servers
+	for _, sourceVolumeServer := range volumeServers {
+		for _, targetVolumeServer := range volumeServers {
+			if sourceVolumeServer == targetVolumeServer {
+				continue
+			}
+			fmt.Fprintf(writer, "checking volume server %s to %s ... ", string(sourceVolumeServer), string(targetVolumeServer))
+			err := pb.WithVolumeServerClient(false, sourceVolumeServer, commandEnv.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
+				pong, err := client.Ping(context.Background(), &volume_server_pb.PingRequest{
+					Target:     string(targetVolumeServer),
+					TargetType: cluster.VolumeServerType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	// check between filers, and need to connect to itself
+	for _, sourceFiler := range filers {
+		for _, targetFiler := range filers {
+			fmt.Fprintf(writer, "checking filer %s to %s ... ", string(sourceFiler), string(targetFiler))
+			err := pb.WithFilerClient(false, sourceFiler, commandEnv.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+				pong, err := client.Ping(context.Background(), &filer_pb.PingRequest{
+					Target:     string(targetFiler),
+					TargetType: cluster.FilerType,
+				})
+				if err == nil {
+					printTiming(writer, pong.StartTimeNs, pong.RemoteTimeNs, pong.StopTimeNs)
+				}
+				return err
+			})
+			if err != nil {
+				fmt.Fprintf(writer, "%v\n", err)
+			}
+		}
+	}
+
+	return nil
+}
+
+func printTiming(writer io.Writer, startNs, remoteNs, stopNs int64) {
+	roundTripTimeMs := float32(stopNs-startNs) / 1000000
+	deltaTimeMs := float32(remoteNs-(startNs+stopNs)/2) / 1000000
+	fmt.Fprintf(writer, "ok round trip %.3fms clock delta %.3fms\n", roundTripTimeMs, deltaTimeMs)
+}
diff --git a/weed/shell/command_cluster_ps.go b/weed/shell/command_cluster_ps.go
new file mode 100644
index 000000000..21d3587fb
--- /dev/null
+++ b/weed/shell/command_cluster_ps.go
@@ -0,0 +1,109 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/cluster"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"io"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+)
+
+func init() {
+	Commands = append(Commands, &commandClusterPs{})
+}
+
+type commandClusterPs struct {
+}
+
+func (c *commandClusterPs) Name() string {
+	return "cluster.ps"
+}
+
+func (c *commandClusterPs) Help() string {
+	return `check current cluster process status
+
+	cluster.ps
+
+`
+}
+
+func (c *commandClusterPs) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	clusterPsCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	if err = clusterPsCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	var filerNodes []*master_pb.ListClusterNodesResponse_ClusterNode
+
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+		resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+			ClientType: cluster.FilerType,
+			FilerGroup: *commandEnv.option.FilerGroup,
+		})
+		if err != nil {
+			return err
+		}
+
+		filerNodes = resp.ClusterNodes
+		return err
+	})
+	if err != nil {
+		return
+	}
+
+	fmt.Fprintf(writer, "* filers %d\n", len(filerNodes))
+	for _, node := range filerNodes {
+		fmt.Fprintf(writer, "  * %s (%v)\n", node.Address, node.Version)
+		pb.WithFilerClient(false, pb.ServerAddress(node.Address), commandEnv.option.GrpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+			resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
+			if err == nil {
+				if resp.FilerGroup != "" {
+					fmt.Fprintf(writer, "    filer group: %s\n", resp.FilerGroup)
+				}
+				fmt.Fprintf(writer, "    signature: %d\n", resp.Signature)
+			} else {
+				fmt.Fprintf(writer, "    failed to connect: %v\n", err)
+			}
+			return err
+		})
+	}
+
+	// collect volume servers
+	var volumeServers []pb.ServerAddress
+	t, _, err := collectTopologyInfo(commandEnv, 0)
+	if err != nil {
+		return err
+	}
+	for _, dc := range t.DataCenterInfos {
+		for _, r := range dc.RackInfos {
+			for _, dn := range r.DataNodeInfos {
+				volumeServers = append(volumeServers, pb.NewServerAddressFromDataNode(dn))
+			}
+		}
+	}
+
+	fmt.Fprintf(writer, "* volume servers %d\n", len(volumeServers))
+	for _, dc := range t.DataCenterInfos {
+		fmt.Fprintf(writer, "  * data center: %s\n", dc.Id)
+		for _, r := range dc.RackInfos {
+			fmt.Fprintf(writer, "    * rack: %s\n", r.Id)
+			for _, dn := range r.DataNodeInfos {
+				pb.WithVolumeServerClient(false, pb.NewServerAddressFromDataNode(dn), commandEnv.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
+					resp, err := client.VolumeServerStatus(context.Background(), &volume_server_pb.VolumeServerStatusRequest{})
+					if err == nil {
+						fmt.Fprintf(writer, "      * %s (%v)\n", dn.Id, resp.Version)
+					}
+					return err
+				})
+			}
+		}
+	}
+
+	return nil
+}
diff --git a/weed/shell/command_cluster_raft_add.go b/weed/shell/command_cluster_raft_add.go
new file mode 100644
index 000000000..e5f3c41c9
--- /dev/null
+++ b/weed/shell/command_cluster_raft_add.go
@@ -0,0 +1,59 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandRaftServerAdd{})
+}
+
+type commandRaftServerAdd struct {
+}
+
+func (c *commandRaftServerAdd) Name() string {
+	return "cluster.raft.add"
+}
+
+func (c *commandRaftServerAdd) Help() string {
+	return `add a server to the raft cluster
+
+	Example:
+		cluster.raft.add -id <server_name> -address <server_host:port> -voter
+`
+}
+
+func (c *commandRaftServerAdd) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	raftServerAddCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	serverId := raftServerAddCommand.String("id", "", "server id")
+	serverAddress := raftServerAddCommand.String("address", "", "server grpc address")
+	serverVoter := raftServerAddCommand.Bool("voter", true, "assign it a vote")
+	if err = raftServerAddCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	if *serverId == "" || *serverAddress == "" {
+		return fmt.Errorf("empty server id or address")
+	}
+
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+		_, err := client.RaftAddServer(context.Background(), &master_pb.RaftAddServerRequest{
+			Id:      *serverId,
+			Address: *serverAddress,
+			Voter:   *serverVoter,
+		})
+		if err != nil {
+			return fmt.Errorf("raft add server: %v", err)
+		}
+		println("added server", *serverId)
+		return nil
+	})
+
+	return err
+
+}
diff --git a/weed/shell/command_cluster_raft_ps.go b/weed/shell/command_cluster_raft_ps.go
new file mode 100644
index 000000000..ea868db06
--- /dev/null
+++ b/weed/shell/command_cluster_raft_ps.go
@@ -0,0 +1,51 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandRaftClusterPs{})
+}
+
+type commandRaftClusterPs struct {
+}
+
+func (c *commandRaftClusterPs) Name() string {
+	return "cluster.raft.ps"
+}
+
+func (c *commandRaftClusterPs) Help() string {
+	return `check current raft cluster status
+
+	cluster.raft.ps
+`
+}
+
+func (c *commandRaftClusterPs) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	raftClusterPsCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	if err = raftClusterPsCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+		resp, err := client.RaftListClusterServers(context.Background(), &master_pb.RaftListClusterServersRequest{})
+		if err != nil {
+			return fmt.Errorf("raft list cluster: %v", err)
+		}
+		fmt.Fprintf(writer, "the raft cluster has %d servers\n", len(resp.ClusterServers))
+		for _, server := range resp.ClusterServers {
+			fmt.Fprintf(writer, "  * %s %s (%s)\n", server.Id, server.Address, server.Suffrage)
+		}
+
+		return nil
+	})
+
+	return err
+
+}
diff --git a/weed/shell/command_cluster_raft_remove.go b/weed/shell/command_cluster_raft_remove.go
new file mode 100644
index 000000000..532a1469c
--- /dev/null
+++ b/weed/shell/command_cluster_raft_remove.go
@@ -0,0 +1,56 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandRaftServerRemove{})
+}
+
+type commandRaftServerRemove struct {
+}
+
+func (c *commandRaftServerRemove) Name() string {
+	return "cluster.raft.remove"
+}
+
+func (c *commandRaftServerRemove) Help() string {
+	return `remove a server from the raft cluster
+
+	Example:
+		cluster.raft.remove -id <server_name>
+`
+}
+
+func (c *commandRaftServerRemove) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	raftServerAddCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	serverId := raftServerAddCommand.String("id", "", "server id")
+	if err = raftServerAddCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	if *serverId == "" {
+		return fmt.Errorf("empty server id")
+	}
+
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+		_, err := client.RaftRemoveServer(context.Background(), &master_pb.RaftRemoveServerRequest{
+			Id:    *serverId,
+			Force: true,
+		})
+		if err != nil {
+			return fmt.Errorf("raft remove server: %v", err)
+		}
+		println("removed server", *serverId)
+		return nil
+	})
+
+	return err
+
+}
diff --git a/weed/shell/command_collection_delete.go b/weed/shell/command_collection_delete.go
index e43f2a093..b89fe7fc0 100644
--- a/weed/shell/command_collection_delete.go
+++ b/weed/shell/command_collection_delete.go
@@ -29,16 +29,17 @@ func (c *commandCollectionDelete) Help() string {
 
 func (c *commandCollectionDelete) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	colDeleteCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	collectionName := colDeleteCommand.String("collection", "", "collection to delete. Use '_default_' for the empty-named collection.")
 	applyBalancing := colDeleteCommand.Bool("force", false, "apply the collection")
 	if err = colDeleteCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	if *collectionName == "" {
 		return fmt.Errorf("empty collection name is not allowed")
@@ -53,7 +54,7 @@ func (c *commandCollectionDelete) Do(args []string, commandEnv *CommandEnv, writ
 		return nil
 	}
 
-	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
 		_, err = client.CollectionDelete(context.Background(), &master_pb.CollectionDeleteRequest{
 			Name: *collectionName,
 		})
diff --git a/weed/shell/command_collection_list.go b/weed/shell/command_collection_list.go
index ba502a6b9..47a4da553 100644
--- a/weed/shell/command_collection_list.go
+++ b/weed/shell/command_collection_list.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/storage/super_block"
 	"io"
 )
 
@@ -23,10 +24,10 @@ func (c *commandCollectionList) Help() string {
 }
 
 type CollectionInfo struct {
-	FileCount        uint64
-	DeleteCount      uint64
-	DeletedByteCount uint64
-	Size             uint64
+	FileCount        float64
+	DeleteCount      float64
+	DeletedByteCount float64
+	Size             float64
 	VolumeCount      int
 }
 
@@ -38,21 +39,21 @@ func (c *commandCollectionList) Do(args []string, commandEnv *CommandEnv, writer
 		return err
 	}
 
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
 
 	collectionInfos := make(map[string]*CollectionInfo)
 
-	writeCollectionInfo(writer, topologyInfo, collectionInfos)
+	collectCollectionInfo(topologyInfo, collectionInfos)
 
 	for _, c := range collections {
 		cif, found := collectionInfos[c]
 		if !found {
 			continue
 		}
-		fmt.Fprintf(writer, "collection:\"%s\"\tvolumeCount:%d\tsize:%d\tfileCount:%d\tdeletedBytes:%d\tdeletion:%d\n", c, cif.VolumeCount, cif.Size, cif.FileCount, cif.DeletedByteCount, cif.DeleteCount)
+		fmt.Fprintf(writer, "collection:\"%s\"\tvolumeCount:%d\tsize:%.0f\tfileCount:%.0f\tdeletedBytes:%.0f\tdeletion:%.0f\n", c, cif.VolumeCount, cif.Size, cif.FileCount, cif.DeletedByteCount, cif.DeleteCount)
 	}
 
 	fmt.Fprintf(writer, "Total %d collections.\n", len(collections))
@@ -62,7 +63,7 @@ func (c *commandCollectionList) Do(args []string, commandEnv *CommandEnv, writer
 
 func ListCollectionNames(commandEnv *CommandEnv, includeNormalVolumes, includeEcVolumes bool) (collections []string, err error) {
 	var resp *master_pb.CollectionListResponse
-	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
 		resp, err = client.CollectionList(context.Background(), &master_pb.CollectionListRequest{
 			IncludeNormalVolumes: includeNormalVolumes,
 			IncludeEcVolumes:     includeEcVolumes,
@@ -85,14 +86,16 @@ func addToCollection(collectionInfos map[string]*CollectionInfo, vif *master_pb.
 		cif = &CollectionInfo{}
 		collectionInfos[c] = cif
 	}
-	cif.Size += vif.Size
-	cif.DeleteCount += vif.DeleteCount
-	cif.FileCount += vif.FileCount
-	cif.DeletedByteCount += vif.DeletedByteCount
+	replicaPlacement, _ := super_block.NewReplicaPlacementFromByte(byte(vif.ReplicaPlacement))
+	copyCount := float64(replicaPlacement.GetCopyCount())
+	cif.Size += float64(vif.Size) / copyCount
+	cif.DeleteCount += float64(vif.DeleteCount) / copyCount
+	cif.FileCount += float64(vif.FileCount) / copyCount
+	cif.DeletedByteCount += float64(vif.DeletedByteCount) / copyCount
 	cif.VolumeCount++
 }
 
-func writeCollectionInfo(writer io.Writer, t *master_pb.TopologyInfo, collectionInfos map[string]*CollectionInfo) {
+func collectCollectionInfo(t *master_pb.TopologyInfo, collectionInfos map[string]*CollectionInfo) {
 	for _, dc := range t.DataCenterInfos {
 		for _, r := range dc.RackInfos {
 			for _, dn := range r.DataNodeInfos {
diff --git a/weed/shell/command_ec_balance.go b/weed/shell/command_ec_balance.go
index b1ca926d5..5641c6954 100644
--- a/weed/shell/command_ec_balance.go
+++ b/weed/shell/command_ec_balance.go
@@ -3,12 +3,12 @@ package shell
 import (
 	"flag"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/storage/types"
-	"io"
-	"sort"
-
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"golang.org/x/exp/slices"
+	"io"
 )
 
 func init() {
@@ -99,10 +99,6 @@ func (c *commandEcBalance) Help() string {
 
 func (c *commandEcBalance) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	balanceCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	collection := balanceCommand.String("collection", "EACH_COLLECTION", "collection name, or \"EACH_COLLECTION\" for each collection")
 	dc := balanceCommand.String("dataCenter", "", "only apply the balancing for this dataCenter")
@@ -110,6 +106,11 @@ func (c *commandEcBalance) Do(args []string, commandEnv *CommandEnv, writer io.W
 	if err = balanceCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	// collect all ec nodes
 	allEcNodes, totalFreeEcSlots, err := collectEcNodes(commandEnv, *dc)
@@ -215,10 +216,10 @@ func doDeduplicateEcShards(commandEnv *CommandEnv, collection string, vid needle
 
 		duplicatedShardIds := []uint32{uint32(shardId)}
 		for _, ecNode := range ecNodes[1:] {
-			if err := unmountEcShards(commandEnv.option.GrpcDialOption, vid, ecNode.info.Id, duplicatedShardIds); err != nil {
+			if err := unmountEcShards(commandEnv.option.GrpcDialOption, vid, pb.NewServerAddressFromDataNode(ecNode.info), duplicatedShardIds); err != nil {
 				return err
 			}
-			if err := sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, vid, ecNode.info.Id, duplicatedShardIds); err != nil {
+			if err := sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, vid, pb.NewServerAddressFromDataNode(ecNode.info), duplicatedShardIds); err != nil {
 				return err
 			}
 			ecNode.deleteEcVolumeShards(vid, duplicatedShardIds)
@@ -410,8 +411,8 @@ func doBalanceEcRack(commandEnv *CommandEnv, ecRack *EcRack, applyBalancing bool
 	hasMove := true
 	for hasMove {
 		hasMove = false
-		sort.Slice(rackEcNodes, func(i, j int) bool {
-			return rackEcNodes[i].freeEcSlot > rackEcNodes[j].freeEcSlot
+		slices.SortFunc(rackEcNodes, func(a, b *EcNode) bool {
+			return a.freeEcSlot > b.freeEcSlot
 		})
 		emptyNode, fullNode := rackEcNodes[0], rackEcNodes[len(rackEcNodes)-1]
 		emptyNodeShardCount, fullNodeShardCount := ecNodeIdToShardCount[emptyNode.info.Id], ecNodeIdToShardCount[fullNode.info.Id]
@@ -491,8 +492,8 @@ func pickNEcShardsToMoveFrom(ecNodes []*EcNode, vid needle.VolumeId, n int) map[
 			})
 		}
 	}
-	sort.Slice(candidateEcNodes, func(i, j int) bool {
-		return candidateEcNodes[i].shardCount > candidateEcNodes[j].shardCount
+	slices.SortFunc(candidateEcNodes, func(a, b *CandidateEcNode) bool {
+		return a.shardCount > b.shardCount
 	})
 	for i := 0; i < n; i++ {
 		selectedEcNodeIndex := -1
diff --git a/weed/shell/command_ec_common.go b/weed/shell/command_ec_common.go
index fd35bb14b..27b650731 100644
--- a/weed/shell/command_ec_common.go
+++ b/weed/shell/command_ec_common.go
@@ -3,17 +3,17 @@ package shell
 import (
 	"context"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/storage/types"
-	"math"
-	"sort"
-
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"golang.org/x/exp/slices"
 	"google.golang.org/grpc"
+	"math"
 )
 
 func moveMountedShardToEcNode(commandEnv *CommandEnv, existingLocation *EcNode, collection string, vid needle.VolumeId, shardId erasure_coding.ShardId, destinationEcNode *EcNode, applyBalancing bool) (err error) {
@@ -22,20 +22,22 @@ func moveMountedShardToEcNode(commandEnv *CommandEnv, existingLocation *EcNode,
 
 	if applyBalancing {
 
+		existingServerAddress := pb.NewServerAddressFromDataNode(existingLocation.info)
+
 		// ask destination node to copy shard and the ecx file from source node, and mount it
-		copiedShardIds, err = oneServerCopyAndMountEcShardsFromSource(commandEnv.option.GrpcDialOption, destinationEcNode, []uint32{uint32(shardId)}, vid, collection, existingLocation.info.Id)
+		copiedShardIds, err = oneServerCopyAndMountEcShardsFromSource(commandEnv.option.GrpcDialOption, destinationEcNode, []uint32{uint32(shardId)}, vid, collection, existingServerAddress)
 		if err != nil {
 			return err
 		}
 
 		// unmount the to be deleted shards
-		err = unmountEcShards(commandEnv.option.GrpcDialOption, vid, existingLocation.info.Id, copiedShardIds)
+		err = unmountEcShards(commandEnv.option.GrpcDialOption, vid, existingServerAddress, copiedShardIds)
 		if err != nil {
 			return err
 		}
 
 		// ask source node to delete the shard, and maybe the ecx file
-		err = sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, vid, existingLocation.info.Id, copiedShardIds)
+		err = sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, vid, existingServerAddress, copiedShardIds)
 		if err != nil {
 			return err
 		}
@@ -53,13 +55,14 @@ func moveMountedShardToEcNode(commandEnv *CommandEnv, existingLocation *EcNode,
 
 func oneServerCopyAndMountEcShardsFromSource(grpcDialOption grpc.DialOption,
 	targetServer *EcNode, shardIdsToCopy []uint32,
-	volumeId needle.VolumeId, collection string, existingLocation string) (copiedShardIds []uint32, err error) {
+	volumeId needle.VolumeId, collection string, existingLocation pb.ServerAddress) (copiedShardIds []uint32, err error) {
 
 	fmt.Printf("allocate %d.%v %s => %s\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id)
 
-	err = operation.WithVolumeServerClient(targetServer.info.Id, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	targetAddress := pb.NewServerAddressFromDataNode(targetServer.info)
+	err = operation.WithVolumeServerClient(false, targetAddress, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 
-		if targetServer.info.Id != existingLocation {
+		if targetAddress != existingLocation {
 
 			fmt.Printf("copy %d.%v %s => %s\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id)
 			_, copyErr := volumeServerClient.VolumeEcShardsCopy(context.Background(), &volume_server_pb.VolumeEcShardsCopyRequest{
@@ -69,7 +72,7 @@ func oneServerCopyAndMountEcShardsFromSource(grpcDialOption grpc.DialOption,
 				CopyEcxFile:    true,
 				CopyEcjFile:    true,
 				CopyVifFile:    true,
-				SourceDataNode: existingLocation,
+				SourceDataNode: string(existingLocation),
 			})
 			if copyErr != nil {
 				return fmt.Errorf("copy %d.%v %s => %s : %v\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id, copyErr)
@@ -86,7 +89,7 @@ func oneServerCopyAndMountEcShardsFromSource(grpcDialOption grpc.DialOption,
 			return fmt.Errorf("mount %d.%v on %s : %v\n", volumeId, shardIdsToCopy, targetServer.info.Id, mountErr)
 		}
 
-		if targetServer.info.Id != existingLocation {
+		if targetAddress != existingLocation {
 			copiedShardIds = shardIdsToCopy
 			glog.V(0).Infof("%s ec volume %d deletes shards %+v", existingLocation, volumeId, copiedShardIds)
 		}
@@ -112,14 +115,14 @@ func eachDataNode(topo *master_pb.TopologyInfo, fn func(dc string, rack RackId,
 }
 
 func sortEcNodesByFreeslotsDecending(ecNodes []*EcNode) {
-	sort.Slice(ecNodes, func(i, j int) bool {
-		return ecNodes[i].freeEcSlot > ecNodes[j].freeEcSlot
+	slices.SortFunc(ecNodes, func(a, b *EcNode) bool {
+		return a.freeEcSlot > b.freeEcSlot
 	})
 }
 
 func sortEcNodesByFreeslotsAscending(ecNodes []*EcNode) {
-	sort.Slice(ecNodes, func(i, j int) bool {
-		return ecNodes[i].freeEcSlot < ecNodes[j].freeEcSlot
+	slices.SortFunc(ecNodes, func(a, b *EcNode) bool {
+		return a.freeEcSlot < b.freeEcSlot
 	})
 }
 
@@ -168,7 +171,7 @@ func countFreeShardSlots(dn *master_pb.DataNodeInfo, diskType types.DiskType) (c
 	if diskInfo == nil {
 		return 0
 	}
-	return int(diskInfo.MaxVolumeCount-diskInfo.ActiveVolumeCount)*erasure_coding.DataShardsCount - countShards(diskInfo.EcShardInfos)
+	return int(diskInfo.MaxVolumeCount-diskInfo.VolumeCount)*erasure_coding.DataShardsCount - countShards(diskInfo.EcShardInfos)
 }
 
 type RackId string
@@ -202,7 +205,7 @@ func collectEcNodes(commandEnv *CommandEnv, selectedDataCenter string) (ecNodes
 
 	// list all possible locations
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return
 	}
@@ -233,11 +236,11 @@ func collectEcVolumeServersByDc(topo *master_pb.TopologyInfo, selectedDataCenter
 	return
 }
 
-func sourceServerDeleteEcShards(grpcDialOption grpc.DialOption, collection string, volumeId needle.VolumeId, sourceLocation string, toBeDeletedShardIds []uint32) error {
+func sourceServerDeleteEcShards(grpcDialOption grpc.DialOption, collection string, volumeId needle.VolumeId, sourceLocation pb.ServerAddress, toBeDeletedShardIds []uint32) error {
 
 	fmt.Printf("delete %d.%v from %s\n", volumeId, toBeDeletedShardIds, sourceLocation)
 
-	return operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(false, sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, deleteErr := volumeServerClient.VolumeEcShardsDelete(context.Background(), &volume_server_pb.VolumeEcShardsDeleteRequest{
 			VolumeId:   uint32(volumeId),
 			Collection: collection,
@@ -248,11 +251,11 @@ func sourceServerDeleteEcShards(grpcDialOption grpc.DialOption, collection strin
 
 }
 
-func unmountEcShards(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceLocation string, toBeUnmountedhardIds []uint32) error {
+func unmountEcShards(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceLocation pb.ServerAddress, toBeUnmountedhardIds []uint32) error {
 
 	fmt.Printf("unmount %d.%v from %s\n", volumeId, toBeUnmountedhardIds, sourceLocation)
 
-	return operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(false, sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, deleteErr := volumeServerClient.VolumeEcShardsUnmount(context.Background(), &volume_server_pb.VolumeEcShardsUnmountRequest{
 			VolumeId: uint32(volumeId),
 			ShardIds: toBeUnmountedhardIds,
@@ -261,11 +264,11 @@ func unmountEcShards(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, s
 	})
 }
 
-func mountEcShards(grpcDialOption grpc.DialOption, collection string, volumeId needle.VolumeId, sourceLocation string, toBeMountedhardIds []uint32) error {
+func mountEcShards(grpcDialOption grpc.DialOption, collection string, volumeId needle.VolumeId, sourceLocation pb.ServerAddress, toBeMountedhardIds []uint32) error {
 
 	fmt.Printf("mount %d.%v on %s\n", volumeId, toBeMountedhardIds, sourceLocation)
 
-	return operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(false, sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, mountErr := volumeServerClient.VolumeEcShardsMount(context.Background(), &volume_server_pb.VolumeEcShardsMountRequest{
 			VolumeId:   uint32(volumeId),
 			Collection: collection,
diff --git a/weed/shell/command_ec_decode.go b/weed/shell/command_ec_decode.go
index e4d597d84..59c5bf83a 100644
--- a/weed/shell/command_ec_decode.go
+++ b/weed/shell/command_ec_decode.go
@@ -4,8 +4,11 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
 	"io"
+	"time"
 
 	"google.golang.org/grpc"
 
@@ -36,26 +39,38 @@ func (c *commandEcDecode) Help() string {
 }
 
 func (c *commandEcDecode) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
-
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	encodeCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeId := encodeCommand.Int("volumeId", 0, "the volume id")
 	collection := encodeCommand.String("collection", "", "the collection name")
+	forceChanges := encodeCommand.Bool("force", false, "force the encoding even if the cluster has less than recommended 4 nodes")
 	if err = encodeCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *forceChanges, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	vid := needle.VolumeId(*volumeId)
 
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
 
+	if !*forceChanges {
+		var nodeCount int
+		eachDataNode(topologyInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) {
+			nodeCount++
+		})
+		if nodeCount < erasure_coding.ParityShardsCount {
+			glog.V(0).Infof("skip erasure coding with %d nodes, less than recommended %d nodes", nodeCount, erasure_coding.ParityShardsCount)
+			return nil
+		}
+	}
+
 	// volumeId is provided
 	if vid != 0 {
 		return doEcDecode(commandEnv, topologyInfo, *collection, vid)
@@ -100,10 +115,10 @@ func doEcDecode(commandEnv *CommandEnv, topoInfo *master_pb.TopologyInfo, collec
 	return nil
 }
 
-func mountVolumeAndDeleteEcShards(grpcDialOption grpc.DialOption, collection, targetNodeLocation string, nodeToEcIndexBits map[string]erasure_coding.ShardBits, vid needle.VolumeId) error {
+func mountVolumeAndDeleteEcShards(grpcDialOption grpc.DialOption, collection string, targetNodeLocation pb.ServerAddress, nodeToEcIndexBits map[pb.ServerAddress]erasure_coding.ShardBits, vid needle.VolumeId) error {
 
 	// mount volume
-	if err := operation.WithVolumeServerClient(targetNodeLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	if err := operation.WithVolumeServerClient(false, targetNodeLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, mountErr := volumeServerClient.VolumeMount(context.Background(), &volume_server_pb.VolumeMountRequest{
 			VolumeId: uint32(vid),
 		})
@@ -132,11 +147,11 @@ func mountVolumeAndDeleteEcShards(grpcDialOption grpc.DialOption, collection, ta
 	return nil
 }
 
-func generateNormalVolume(grpcDialOption grpc.DialOption, vid needle.VolumeId, collection string, sourceVolumeServer string) error {
+func generateNormalVolume(grpcDialOption grpc.DialOption, vid needle.VolumeId, collection string, sourceVolumeServer pb.ServerAddress) error {
 
 	fmt.Printf("generateNormalVolume from ec volume %d on %s\n", vid, sourceVolumeServer)
 
-	err := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	err := operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, genErr := volumeServerClient.VolumeEcShardsToVolume(context.Background(), &volume_server_pb.VolumeEcShardsToVolumeRequest{
 			VolumeId:   uint32(vid),
 			Collection: collection,
@@ -148,7 +163,7 @@ func generateNormalVolume(grpcDialOption grpc.DialOption, vid needle.VolumeId, c
 
 }
 
-func collectEcShards(commandEnv *CommandEnv, nodeToEcIndexBits map[string]erasure_coding.ShardBits, collection string, vid needle.VolumeId) (targetNodeLocation string, err error) {
+func collectEcShards(commandEnv *CommandEnv, nodeToEcIndexBits map[pb.ServerAddress]erasure_coding.ShardBits, collection string, vid needle.VolumeId) (targetNodeLocation pb.ServerAddress, err error) {
 
 	maxShardCount := 0
 	var exisitngEcIndexBits erasure_coding.ShardBits
@@ -174,7 +189,7 @@ func collectEcShards(commandEnv *CommandEnv, nodeToEcIndexBits map[string]erasur
 			continue
 		}
 
-		err = operation.WithVolumeServerClient(targetNodeLocation, commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+		err = operation.WithVolumeServerClient(false, targetNodeLocation, commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 
 			fmt.Printf("copy %d.%v %s => %s\n", vid, needToCopyEcIndexBits.ShardIds(), loc, targetNodeLocation)
 
@@ -185,7 +200,7 @@ func collectEcShards(commandEnv *CommandEnv, nodeToEcIndexBits map[string]erasur
 				CopyEcxFile:    false,
 				CopyEcjFile:    true,
 				CopyVifFile:    true,
-				SourceDataNode: loc,
+				SourceDataNode: string(loc),
 			})
 			if copyErr != nil {
 				return fmt.Errorf("copy %d.%v %s => %s : %v\n", vid, needToCopyEcIndexBits.ShardIds(), loc, targetNodeLocation, copyErr)
@@ -208,10 +223,26 @@ func collectEcShards(commandEnv *CommandEnv, nodeToEcIndexBits map[string]erasur
 
 }
 
-func collectTopologyInfo(commandEnv *CommandEnv) (topoInfo *master_pb.TopologyInfo, volumeSizeLimitMb uint64, err error) {
+func lookupVolumeIds(commandEnv *CommandEnv, volumeIds []string) (volumeIdLocations []*master_pb.LookupVolumeResponse_VolumeIdLocation, err error) {
+	var resp *master_pb.LookupVolumeResponse
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+		resp, err = client.LookupVolume(context.Background(), &master_pb.LookupVolumeRequest{VolumeOrFileIds: volumeIds})
+		return err
+	})
+	if err != nil {
+		return nil, err
+	}
+	return resp.VolumeIdLocations, nil
+}
+
+func collectTopologyInfo(commandEnv *CommandEnv, delayBeforeCollecting time.Duration) (topoInfo *master_pb.TopologyInfo, volumeSizeLimitMb uint64, err error) {
+
+	if delayBeforeCollecting > 0 {
+		time.Sleep(delayBeforeCollecting)
+	}
 
 	var resp *master_pb.VolumeListResponse
-	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
 		resp, err = client.VolumeList(context.Background(), &master_pb.VolumeListRequest{})
 		return err
 	})
@@ -243,14 +274,14 @@ func collectEcShardIds(topoInfo *master_pb.TopologyInfo, selectedCollection stri
 	return
 }
 
-func collectEcNodeShardBits(topoInfo *master_pb.TopologyInfo, vid needle.VolumeId) map[string]erasure_coding.ShardBits {
+func collectEcNodeShardBits(topoInfo *master_pb.TopologyInfo, vid needle.VolumeId) map[pb.ServerAddress]erasure_coding.ShardBits {
 
-	nodeToEcIndexBits := make(map[string]erasure_coding.ShardBits)
+	nodeToEcIndexBits := make(map[pb.ServerAddress]erasure_coding.ShardBits)
 	eachDataNode(topoInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) {
 		if diskInfo, found := dn.DiskInfos[string(types.HardDriveType)]; found {
 			for _, v := range diskInfo.EcShardInfos {
 				if v.Id == uint32(vid) {
-					nodeToEcIndexBits[dn.Id] = erasure_coding.ShardBits(v.EcIndexBits)
+					nodeToEcIndexBits[pb.NewServerAddressFromDataNode(dn)] = erasure_coding.ShardBits(v.EcIndexBits)
 				}
 			}
 		}
diff --git a/weed/shell/command_ec_encode.go b/weed/shell/command_ec_encode.go
index 014b9bab7..251448908 100644
--- a/weed/shell/command_ec_encode.go
+++ b/weed/shell/command_ec_encode.go
@@ -4,7 +4,9 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
+	"math/rand"
 	"sync"
 	"time"
 
@@ -32,7 +34,7 @@ func (c *commandEcEncode) Name() string {
 func (c *commandEcEncode) Help() string {
 	return `apply erasure coding to a volume
 
-	ec.encode [-collection=""] [-fullPercent=95] [-quietFor=1h]
+	ec.encode [-collection=""] [-fullPercent=95 -quietFor=1h]
 	ec.encode [-collection=""] [-volumeId=<volume_id>]
 
 	This command will:
@@ -54,10 +56,6 @@ func (c *commandEcEncode) Help() string {
 
 func (c *commandEcEncode) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	encodeCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeId := encodeCommand.Int("volumeId", 0, "the volume id")
 	collection := encodeCommand.String("collection", "", "the collection name")
@@ -68,6 +66,10 @@ func (c *commandEcEncode) Do(args []string, commandEnv *CommandEnv, writer io.Wr
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	vid := needle.VolumeId(*volumeId)
 
 	// volumeId is provided
@@ -93,7 +95,7 @@ func (c *commandEcEncode) Do(args []string, commandEnv *CommandEnv, writer io.Wr
 func doEcEncode(commandEnv *CommandEnv, collection string, vid needle.VolumeId, parallelCopy bool) (err error) {
 	// find volume location
 	locations, found := commandEnv.MasterClient.GetLocations(uint32(vid))
-	if !found {
+	if !found && len(locations) > 0 {
 		return fmt.Errorf("volume %d not found", vid)
 	}
 
@@ -106,7 +108,7 @@ func doEcEncode(commandEnv *CommandEnv, collection string, vid needle.VolumeId,
 	}
 
 	// generate ec shards
-	err = generateEcShards(commandEnv.option.GrpcDialOption, vid, collection, locations[0].Url)
+	err = generateEcShards(commandEnv.option.GrpcDialOption, vid, collection, locations[0].ServerAddress())
 	if err != nil {
 		return fmt.Errorf("generate ec shards for volume %d on %s: %v", vid, locations[0].Url, err)
 	}
@@ -120,11 +122,11 @@ func doEcEncode(commandEnv *CommandEnv, collection string, vid needle.VolumeId,
 	return nil
 }
 
-func generateEcShards(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, collection string, sourceVolumeServer string) error {
+func generateEcShards(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, collection string, sourceVolumeServer pb.ServerAddress) error {
 
 	fmt.Printf("generateEcShards %s %d on %s ...\n", collection, volumeId, sourceVolumeServer)
 
-	err := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	err := operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, genErr := volumeServerClient.VolumeEcShardsGenerate(context.Background(), &volume_server_pb.VolumeEcShardsGenerateRequest{
 			VolumeId:   uint32(volumeId),
 			Collection: collection,
@@ -161,13 +163,13 @@ func spreadEcShards(commandEnv *CommandEnv, volumeId needle.VolumeId, collection
 	}
 
 	// unmount the to be deleted shards
-	err = unmountEcShards(commandEnv.option.GrpcDialOption, volumeId, existingLocations[0].Url, copiedShardIds)
+	err = unmountEcShards(commandEnv.option.GrpcDialOption, volumeId, existingLocations[0].ServerAddress(), copiedShardIds)
 	if err != nil {
 		return err
 	}
 
 	// ask the source volume server to clean up copied ec shards
-	err = sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, volumeId, existingLocations[0].Url, copiedShardIds)
+	err = sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, volumeId, existingLocations[0].ServerAddress(), copiedShardIds)
 	if err != nil {
 		return fmt.Errorf("source delete copied ecShards %s %d.%v: %v", existingLocations[0].Url, volumeId, copiedShardIds, err)
 	}
@@ -175,7 +177,7 @@ func spreadEcShards(commandEnv *CommandEnv, volumeId needle.VolumeId, collection
 	// ask the source volume server to delete the original volume
 	for _, location := range existingLocations {
 		fmt.Printf("delete volume %d from %s\n", volumeId, location.Url)
-		err = deleteVolume(commandEnv.option.GrpcDialOption, volumeId, location.Url)
+		err = deleteVolume(commandEnv.option.GrpcDialOption, volumeId, location.ServerAddress())
 		if err != nil {
 			return fmt.Errorf("deleteVolume %s volume %d: %v", location.Url, volumeId, err)
 		}
@@ -194,7 +196,7 @@ func parallelCopyEcShardsFromSource(grpcDialOption grpc.DialOption, targetServer
 	copyFunc := func(server *EcNode, allocatedEcShardIds []uint32) {
 		defer wg.Done()
 		copiedShardIds, copyErr := oneServerCopyAndMountEcShardsFromSource(grpcDialOption, server,
-			allocatedEcShardIds, volumeId, collection, existingLocation.Url)
+			allocatedEcShardIds, volumeId, collection, existingLocation.ServerAddress())
 		if copyErr != nil {
 			err = copyErr
 		} else {
@@ -202,6 +204,14 @@ func parallelCopyEcShardsFromSource(grpcDialOption grpc.DialOption, targetServer
 			server.addEcVolumeShards(volumeId, collection, copiedShardIds)
 		}
 	}
+	cleanupFunc := func(server *EcNode, allocatedEcShardIds []uint32) {
+		if err := unmountEcShards(grpcDialOption, volumeId, pb.NewServerAddressFromDataNode(server.info), allocatedEcShardIds); err != nil {
+			fmt.Printf("unmount aborted shards %d.%v on %s: %v\n", volumeId, allocatedEcShardIds, server.info.Id, err)
+		}
+		if err := sourceServerDeleteEcShards(grpcDialOption, collection, volumeId, pb.NewServerAddressFromDataNode(server.info), allocatedEcShardIds); err != nil {
+			fmt.Printf("remove aborted shards %d.%v on %s: %v\n", volumeId, allocatedEcShardIds, server.info.Id, err)
+		}
+	}
 
 	// maybe parallelize
 	for i, server := range targetServers {
@@ -220,6 +230,12 @@ func parallelCopyEcShardsFromSource(grpcDialOption grpc.DialOption, targetServer
 	close(shardIdChan)
 
 	if err != nil {
+		for i, server := range targetServers {
+			if len(allocatedEcIds[i]) <= 0 {
+				continue
+			}
+			cleanupFunc(server, allocatedEcIds[i])
+		}
 		return nil, err
 	}
 
@@ -233,7 +249,7 @@ func parallelCopyEcShardsFromSource(grpcDialOption grpc.DialOption, targetServer
 func balancedEcDistribution(servers []*EcNode) (allocated [][]uint32) {
 	allocated = make([][]uint32, len(servers))
 	allocatedShardIdIndex := uint32(0)
-	serverIndex := 0
+	serverIndex := rand.Intn(len(servers))
 	for allocatedShardIdIndex < erasure_coding.TotalShardsCount {
 		if servers[serverIndex].freeEcSlot > 0 {
 			allocated[serverIndex] = append(allocated[serverIndex], allocatedShardIdIndex)
@@ -251,7 +267,7 @@ func balancedEcDistribution(servers []*EcNode) (allocated [][]uint32) {
 func collectVolumeIdsForEcEncode(commandEnv *CommandEnv, selectedCollection string, fullPercentage float64, quietPeriod time.Duration) (vids []needle.VolumeId, err error) {
 
 	// collect topology information
-	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv)
+	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return
 	}
diff --git a/weed/shell/command_ec_encode_test.go b/weed/shell/command_ec_encode_test.go
new file mode 100644
index 000000000..940c64266
--- /dev/null
+++ b/weed/shell/command_ec_encode_test.go
@@ -0,0 +1,31 @@
+package shell
+
+import (
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
+	"testing"
+)
+
+func TestEcDistribution(t *testing.T) {
+
+	topologyInfo := parseOutput(topoData)
+
+	// find out all volume servers with one slot left.
+	ecNodes, totalFreeEcSlots := collectEcVolumeServersByDc(topologyInfo, "")
+
+	sortEcNodesByFreeslotsDecending(ecNodes)
+
+	if totalFreeEcSlots < erasure_coding.TotalShardsCount {
+		println("not enough free ec shard slots", totalFreeEcSlots)
+	}
+	allocatedDataNodes := ecNodes
+	if len(allocatedDataNodes) > erasure_coding.TotalShardsCount {
+		allocatedDataNodes = allocatedDataNodes[:erasure_coding.TotalShardsCount]
+	}
+
+	for _, dn := range allocatedDataNodes {
+		// fmt.Printf("info %+v %+v\n", dn.info, dn)
+		fmt.Printf("=> %+v %+v\n", dn.info.Id, dn.freeEcSlot)
+	}
+
+}
diff --git a/weed/shell/command_ec_rebuild.go b/weed/shell/command_ec_rebuild.go
index 8d5d7bb91..a2e1f4d44 100644
--- a/weed/shell/command_ec_rebuild.go
+++ b/weed/shell/command_ec_rebuild.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
@@ -56,16 +57,17 @@ func (c *commandEcRebuild) Help() string {
 
 func (c *commandEcRebuild) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	fixCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	collection := fixCommand.String("collection", "EACH_COLLECTION", "collection name, or \"EACH_COLLECTION\" for each collection")
 	applyChanges := fixCommand.Bool("force", false, "apply the changes")
 	if err = fixCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChanges, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	// collect all ec nodes
 	allEcNodes, _, err := collectEcNodes(commandEnv, "")
@@ -141,7 +143,7 @@ func rebuildOneEcVolume(commandEnv *CommandEnv, rebuilder *EcNode, collection st
 		// clean up working files
 
 		// ask the rebuilder to delete the copied shards
-		err = sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, volumeId, rebuilder.info.Id, copiedShardIds)
+		err = sourceServerDeleteEcShards(commandEnv.option.GrpcDialOption, collection, volumeId, pb.NewServerAddressFromDataNode(rebuilder.info), copiedShardIds)
 		if err != nil {
 			fmt.Fprintf(writer, "%s delete copied ec shards %s %d.%v\n", rebuilder.info.Id, collection, volumeId, copiedShardIds)
 		}
@@ -153,13 +155,13 @@ func rebuildOneEcVolume(commandEnv *CommandEnv, rebuilder *EcNode, collection st
 	}
 
 	// generate ec shards, and maybe ecx file
-	generatedShardIds, err = generateMissingShards(commandEnv.option.GrpcDialOption, collection, volumeId, rebuilder.info.Id)
+	generatedShardIds, err = generateMissingShards(commandEnv.option.GrpcDialOption, collection, volumeId, pb.NewServerAddressFromDataNode(rebuilder.info))
 	if err != nil {
 		return err
 	}
 
 	// mount the generated shards
-	err = mountEcShards(commandEnv.option.GrpcDialOption, collection, volumeId, rebuilder.info.Id, generatedShardIds)
+	err = mountEcShards(commandEnv.option.GrpcDialOption, collection, volumeId, pb.NewServerAddressFromDataNode(rebuilder.info), generatedShardIds)
 	if err != nil {
 		return err
 	}
@@ -169,9 +171,9 @@ func rebuildOneEcVolume(commandEnv *CommandEnv, rebuilder *EcNode, collection st
 	return nil
 }
 
-func generateMissingShards(grpcDialOption grpc.DialOption, collection string, volumeId needle.VolumeId, sourceLocation string) (rebuiltShardIds []uint32, err error) {
+func generateMissingShards(grpcDialOption grpc.DialOption, collection string, volumeId needle.VolumeId, sourceLocation pb.ServerAddress) (rebuiltShardIds []uint32, err error) {
 
-	err = operation.WithVolumeServerClient(sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	err = operation.WithVolumeServerClient(false, sourceLocation, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		resp, rebultErr := volumeServerClient.VolumeEcShardsRebuild(context.Background(), &volume_server_pb.VolumeEcShardsRebuildRequest{
 			VolumeId:   uint32(volumeId),
 			Collection: collection,
@@ -212,7 +214,7 @@ func prepareDataToRecover(commandEnv *CommandEnv, rebuilder *EcNode, collection
 
 		var copyErr error
 		if applyBalancing {
-			copyErr = operation.WithVolumeServerClient(rebuilder.info.Id, commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+			copyErr = operation.WithVolumeServerClient(false, pb.NewServerAddressFromDataNode(rebuilder.info), commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 				_, copyErr := volumeServerClient.VolumeEcShardsCopy(context.Background(), &volume_server_pb.VolumeEcShardsCopyRequest{
 					VolumeId:       uint32(volumeId),
 					Collection:     collection,
diff --git a/weed/shell/command_fs_cat.go b/weed/shell/command_fs_cat.go
index a5731240d..16be25ee5 100644
--- a/weed/shell/command_fs_cat.go
+++ b/weed/shell/command_fs_cat.go
@@ -2,12 +2,10 @@ package shell
 
 import (
 	"fmt"
-	"io"
-	"math"
-
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"io"
 )
 
 func init() {
@@ -41,7 +39,7 @@ func (c *commandFsCat) Do(args []string, commandEnv *CommandEnv, writer io.Write
 
 	dir, name := util.FullPath(path).DirAndName()
 
-	return commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.LookupDirectoryEntryRequest{
 			Name:      name,
@@ -57,7 +55,7 @@ func (c *commandFsCat) Do(args []string, commandEnv *CommandEnv, writer io.Write
 			return err
 		}
 
-		return filer.StreamContent(commandEnv.MasterClient, writer, respLookupEntry.Entry.Chunks, 0, math.MaxInt64)
+		return filer.StreamContent(commandEnv.MasterClient, writer, respLookupEntry.Entry.Chunks, 0, int64(filer.FileSize(respLookupEntry.Entry)))
 
 	})
 
diff --git a/weed/shell/command_fs_configure.go b/weed/shell/command_fs_configure.go
index 0aae51d74..2c4ef2211 100644
--- a/weed/shell/command_fs_configure.go
+++ b/weed/shell/command_fs_configure.go
@@ -55,6 +55,9 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 	diskType := fsConfigureCommand.String("disk", "", "[hdd|ssd|<tag>] hard drive or solid state drive or any tag")
 	fsync := fsConfigureCommand.Bool("fsync", false, "fsync for the writes")
 	isReadOnly := fsConfigureCommand.Bool("readOnly", false, "disable writes")
+	dataCenter := fsConfigureCommand.String("dataCenter", "", "assign writes to this dataCenter")
+	rack := fsConfigureCommand.String("rack", "", "assign writes to this rack")
+	dataNode := fsConfigureCommand.String("dataNode", "", "assign writes to this dataNode")
 	volumeGrowthCount := fsConfigureCommand.Int("volumeGrowthCount", 0, "the number of physical volumes to add if no writable volumes")
 	isDelete := fsConfigureCommand.Bool("delete", false, "delete the configuration by locationPrefix")
 	apply := fsConfigureCommand.Bool("apply", false, "update and apply filer configuration")
@@ -62,12 +65,13 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 		return nil
 	}
 
-	fc, err := readFilerConf(commandEnv)
+	fc, err := filer.ReadFilerConf(commandEnv.option.FilerAddress, commandEnv.option.GrpcDialOption, commandEnv.MasterClient)
 	if err != nil {
 		return err
 	}
 
 	if *locationPrefix != "" {
+		infoAboutSimulationMode(writer, *apply, "-apply")
 		locConf := &filer_pb.FilerConf_PathConf{
 			LocationPrefix:    *locationPrefix,
 			Collection:        *collection,
@@ -77,6 +81,9 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 			DiskType:          *diskType,
 			VolumeGrowthCount: uint32(*volumeGrowthCount),
 			ReadOnly:          *isReadOnly,
+			DataCenter:        *dataCenter,
+			Rack:              *rack,
+			DataNode:          *dataNode,
 		}
 
 		// check collection
@@ -111,7 +118,7 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 
 	if *apply {
 
-		if err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		if err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 			return filer.SaveInsideFiler(client, filer.DirectoryEtcSeaweedFS, filer.FilerConfName, buf2.Bytes())
 		}); err != nil && err != filer_pb.ErrNotFound {
 			return err
@@ -123,19 +130,9 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 
 }
 
-func readFilerConf(commandEnv *CommandEnv) (*filer.FilerConf, error) {
-	var buf bytes.Buffer
-	if err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-		return filer.ReadEntry(commandEnv.MasterClient, client, filer.DirectoryEtcSeaweedFS, filer.FilerConfName, &buf)
-	}); err != nil && err != filer_pb.ErrNotFound {
-		return nil, fmt.Errorf("read %s/%s: %v", filer.DirectoryEtcSeaweedFS, filer.FilerConfName, err)
+func infoAboutSimulationMode(writer io.Writer, forceMode bool, forceModeOption string) {
+	if forceMode {
+		return
 	}
-
-	fc := filer.NewFilerConf()
-	if buf.Len() > 0 {
-		if err := fc.LoadFromBytes(buf.Bytes()); err != nil {
-			return nil, fmt.Errorf("parse %s/%s: %v", filer.DirectoryEtcSeaweedFS, filer.FilerConfName, err)
-		}
-	}
-	return fc, nil
+	fmt.Fprintf(writer, "Running in simulation mode. Use \"%s\" option to apply the changes.\n", forceModeOption)
 }
diff --git a/weed/shell/command_fs_meta_cat.go b/weed/shell/command_fs_meta_cat.go
index e0525defa..4616c072d 100644
--- a/weed/shell/command_fs_meta_cat.go
+++ b/weed/shell/command_fs_meta_cat.go
@@ -2,11 +2,10 @@ package shell
 
 import (
 	"fmt"
+	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
+	"golang.org/x/exp/slices"
 	"io"
-	"sort"
-
-	"github.com/golang/protobuf/jsonpb"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
@@ -40,7 +39,7 @@ func (c *commandFsMetaCat) Do(args []string, commandEnv *CommandEnv, writer io.W
 
 	dir, name := util.FullPath(path).DirAndName()
 
-	return commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.LookupDirectoryEntryRequest{
 			Name:      name,
@@ -55,14 +54,12 @@ func (c *commandFsMetaCat) Do(args []string, commandEnv *CommandEnv, writer io.W
 			EmitDefaults: true,
 			Indent:       "  ",
 		}
-
-		sort.Slice(respLookupEntry.Entry.Chunks, func(i, j int) bool {
-			if respLookupEntry.Entry.Chunks[i].Offset == respLookupEntry.Entry.Chunks[j].Offset {
-				return respLookupEntry.Entry.Chunks[i].Mtime < respLookupEntry.Entry.Chunks[j].Mtime
+		slices.SortFunc(respLookupEntry.Entry.Chunks, func(a, b *filer_pb.FileChunk) bool {
+			if a.Offset == b.Offset {
+				return a.Mtime < b.Mtime
 			}
-			return respLookupEntry.Entry.Chunks[i].Offset < respLookupEntry.Entry.Chunks[j].Offset
+			return a.Offset < b.Offset
 		})
-
 		text, marshalErr := m.MarshalToString(respLookupEntry.Entry)
 		if marshalErr != nil {
 			return fmt.Errorf("marshal meta: %v", marshalErr)
diff --git a/weed/shell/command_fs_meta_load.go b/weed/shell/command_fs_meta_load.go
index 46dc07e9a..7fe4cf809 100644
--- a/weed/shell/command_fs_meta_load.go
+++ b/weed/shell/command_fs_meta_load.go
@@ -48,7 +48,7 @@ func (c *commandFsMetaLoad) Do(args []string, commandEnv *CommandEnv, writer io.
 
 	var dirCount, fileCount uint64
 
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		sizeBuf := make([]byte, 4)
 
diff --git a/weed/shell/command_fs_meta_notify.go b/weed/shell/command_fs_meta_notify.go
index 4342fa81d..5982214f9 100644
--- a/weed/shell/command_fs_meta_notify.go
+++ b/weed/shell/command_fs_meta_notify.go
@@ -21,7 +21,7 @@ func (c *commandFsMetaNotify) Name() string {
 }
 
 func (c *commandFsMetaNotify) Help() string {
-	return `recursively send directory and file meta data to notifiction message queue
+	return `recursively send directory and file meta data to notification message queue
 
 	fs.meta.notify	# send meta data from current directory to notification message queue
 
diff --git a/weed/shell/command_fs_meta_save.go b/weed/shell/command_fs_meta_save.go
index b6f2a9172..ea909a527 100644
--- a/weed/shell/command_fs_meta_save.go
+++ b/weed/shell/command_fs_meta_save.go
@@ -3,6 +3,7 @@ package shell
 import (
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/filer"
 	"io"
 	"os"
 	"path/filepath"
@@ -62,8 +63,8 @@ func (c *commandFsMetaSave) Do(args []string, commandEnv *CommandEnv, writer io.
 	fileName := *outputFileName
 	if fileName == "" {
 		t := time.Now()
-		fileName = fmt.Sprintf("%s-%d-%4d%02d%02d-%02d%02d%02d.meta",
-			commandEnv.option.FilerHost, commandEnv.option.FilerPort, t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
+		fileName = fmt.Sprintf("%s-%4d%02d%02d-%02d%02d%02d.meta",
+			commandEnv.option.FilerAddress.ToHttpAddress(), t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
 	}
 
 	dst, openErr := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
@@ -77,15 +78,7 @@ func (c *commandFsMetaSave) Do(args []string, commandEnv *CommandEnv, writer io.
 		cipherKey = util.GenCipherKey()
 	}
 
-	err = doTraverseBfsAndSaving(commandEnv, writer, path, *verbose, func(outputChan chan interface{}) {
-		sizeBuf := make([]byte, 4)
-		for item := range outputChan {
-			b := item.([]byte)
-			util.Uint32toBytes(sizeBuf, uint32(len(b)))
-			dst.Write(sizeBuf)
-			dst.Write(b)
-		}
-	}, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
+	err = doTraverseBfsAndSaving(commandEnv, writer, path, *verbose, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
 		if !entry.Entry.IsDirectory {
 			ext := filepath.Ext(entry.Entry.Name)
 			if encrypted, encErr := util.Encrypt([]byte(entry.Entry.Name), cipherKey); encErr == nil {
@@ -101,17 +94,25 @@ func (c *commandFsMetaSave) Do(args []string, commandEnv *CommandEnv, writer io.
 
 		outputChan <- bytes
 		return nil
+	}, func(outputChan chan interface{}) {
+		sizeBuf := make([]byte, 4)
+		for item := range outputChan {
+			b := item.([]byte)
+			util.Uint32toBytes(sizeBuf, uint32(len(b)))
+			dst.Write(sizeBuf)
+			dst.Write(b)
+		}
 	})
 
 	if err == nil {
-		fmt.Fprintf(writer, "meta data for http://%s:%d%s is saved to %s\n", commandEnv.option.FilerHost, commandEnv.option.FilerPort, path, fileName)
+		fmt.Fprintf(writer, "meta data for http://%s%s is saved to %s\n", commandEnv.option.FilerAddress.ToHttpAddress(), path, fileName)
 	}
 
 	return err
 
 }
 
-func doTraverseBfsAndSaving(filerClient filer_pb.FilerClient, writer io.Writer, path string, verbose bool, saveFn func(outputChan chan interface{}), genFn func(entry *filer_pb.FullEntry, outputChan chan interface{}) error) error {
+func doTraverseBfsAndSaving(filerClient filer_pb.FilerClient, writer io.Writer, path string, verbose bool, genFn func(entry *filer_pb.FullEntry, outputChan chan interface{}) error, saveFn func(outputChan chan interface{})) error {
 
 	var wg sync.WaitGroup
 	wg.Add(1)
@@ -125,6 +126,10 @@ func doTraverseBfsAndSaving(filerClient filer_pb.FilerClient, writer io.Writer,
 
 	err := filer_pb.TraverseBfs(filerClient, util.FullPath(path), func(parentPath util.FullPath, entry *filer_pb.Entry) {
 
+		if strings.HasPrefix(string(parentPath), filer.SystemLogDir) {
+			return
+		}
+
 		protoMessage := &filer_pb.FullEntry{
 			Dir:   string(parentPath),
 			Entry: entry,
diff --git a/weed/shell/command_fs_mkdir.go b/weed/shell/command_fs_mkdir.go
index 11b663eec..71a35cb68 100644
--- a/weed/shell/command_fs_mkdir.go
+++ b/weed/shell/command_fs_mkdir.go
@@ -36,7 +36,7 @@ func (c *commandFsMkdir) Do(args []string, commandEnv *CommandEnv, writer io.Wri
 
 	dir, name := util.FullPath(path).DirAndName()
 
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		_, createErr := client.CreateEntry(context.Background(), &filer_pb.CreateEntryRequest{
 			Directory: dir,
diff --git a/weed/shell/command_fs_mv.go b/weed/shell/command_fs_mv.go
index 2448c8f61..612cdc84e 100644
--- a/weed/shell/command_fs_mv.go
+++ b/weed/shell/command_fs_mv.go
@@ -54,7 +54,7 @@ func (c *commandFsMv) Do(args []string, commandEnv *CommandEnv, writer io.Writer
 
 	destinationDir, destinationName := util.FullPath(destinationPath).DirAndName()
 
-	return commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		// collect destination entry info
 		destinationRequest := &filer_pb.LookupDirectoryEntryRequest{
diff --git a/weed/shell/command_fs_rm.go b/weed/shell/command_fs_rm.go
index b383366ca..2ce3275bb 100644
--- a/weed/shell/command_fs_rm.go
+++ b/weed/shell/command_fs_rm.go
@@ -56,7 +56,7 @@ func (c *commandFsRm) Do(args []string, commandEnv *CommandEnv, writer io.Writer
 		return fmt.Errorf("need to have arguments")
 	}
 
-	commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 		for _, entry := range entiries {
 			targetPath, err := commandEnv.parseUrl(entry)
 			if err != nil {
diff --git a/weed/shell/command_fs_lock_unlock.go b/weed/shell/command_lock_unlock.go
index 33458bb6f..33458bb6f 100644
--- a/weed/shell/command_fs_lock_unlock.go
+++ b/weed/shell/command_lock_unlock.go
diff --git a/weed/shell/command_mount_configure.go b/weed/shell/command_mount_configure.go
new file mode 100644
index 000000000..8c268d35c
--- /dev/null
+++ b/weed/shell/command_mount_configure.go
@@ -0,0 +1,64 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/mount_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+	_ "google.golang.org/grpc/resolver/passthrough"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandMountConfigure{})
+}
+
+type commandMountConfigure struct {
+}
+
+func (c *commandMountConfigure) Name() string {
+	return "mount.configure"
+}
+
+func (c *commandMountConfigure) Help() string {
+	return `configure the mount on current server
+
+	mount.configure -dir=<mount_directory>
+
+	This command connects with local mount via unix socket, so it can only run locally.
+	The "mount_directory" value needs to be exactly the same as how mount was started in "weed mount -dir=<mount_directory>"
+
+`
+}
+
+func (c *commandMountConfigure) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	mountConfigureCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	mountDir := mountConfigureCommand.String("dir", "", "the mount directory same as how \"weed mount -dir=<mount_directory>\" was started")
+	mountQuota := mountConfigureCommand.Int("quotaMB", 0, "the quota in MB")
+	if err = mountConfigureCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	mountDirHash := util.HashToInt32([]byte(*mountDir))
+	if mountDirHash < 0 {
+		mountDirHash = -mountDirHash
+	}
+	localSocket := fmt.Sprintf("/tmp/seaweefs-mount-%d.sock", mountDirHash)
+
+	clientConn, err := grpc.Dial("passthrough:///unix://"+localSocket, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	if err != nil {
+		return
+	}
+	defer clientConn.Close()
+
+	client := mount_pb.NewSeaweedMountClient(clientConn)
+	_, err = client.Configure(context.Background(), &mount_pb.ConfigureRequest{
+		CollectionCapacity: int64(*mountQuota) * 1024 * 1024,
+	})
+
+	return
+}
diff --git a/weed/shell/command_remote_cache.go b/weed/shell/command_remote_cache.go
index 2888ec979..2bd8d4eda 100644
--- a/weed/shell/command_remote_cache.go
+++ b/weed/shell/command_remote_cache.go
@@ -26,7 +26,7 @@ func (c *commandRemoteCache) Help() string {
 	return `cache the file content for mounted directories or files
 
 	# assume a remote storage is configured to name "cloud1"
-	remote.configure -name=cloud1 -type=s3 -access_key=xxx -secret_key=yyy
+	remote.configure -name=cloud1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
 	# mount and pull one bucket
 	remote.mount -dir=/xxx -remote=cloud1/bucket
 
@@ -50,7 +50,7 @@ func (c *commandRemoteCache) Do(args []string, commandEnv *CommandEnv, writer io
 
 	remoteMountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 
-	dir := remoteMountCommand.String("dir", "", "a directory in filer")
+	dir := remoteMountCommand.String("dir", "", "a mounted directory or one of its sub folders in filer")
 	concurrency := remoteMountCommand.Int("concurrent", 32, "concurrent file downloading")
 	fileFiler := newFileFilter(remoteMountCommand)
 
@@ -58,15 +58,37 @@ func (c *commandRemoteCache) Do(args []string, commandEnv *CommandEnv, writer io
 		return nil
 	}
 
-	mappings, localMountedDir, remoteStorageMountedLocation, remoteStorageConf, detectErr := detectMountInfo(commandEnv, writer, *dir)
-	if detectErr != nil{
+	if *dir != "" {
+		if err := c.doCacheOneDirectory(commandEnv, writer, *dir, fileFiler, *concurrency); err != nil {
+			return err
+		}
+		return nil
+	}
+
+	mappings, err := filer.ReadMountMappings(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress)
+	if err != nil {
+		return err
+	}
+
+	for key, _ := range mappings.Mappings {
+		if err := c.doCacheOneDirectory(commandEnv, writer, key, fileFiler, *concurrency); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (c *commandRemoteCache) doCacheOneDirectory(commandEnv *CommandEnv, writer io.Writer, dir string, fileFiler *FileFilter, concurrency int) error {
+	mappings, localMountedDir, remoteStorageMountedLocation, remoteStorageConf, detectErr := detectMountInfo(commandEnv, writer, dir)
+	if detectErr != nil {
 		jsonPrintln(writer, mappings)
 		return detectErr
 	}
 
 	// pull content from remote
-	if err = c.cacheContentData(commandEnv, writer, util.FullPath(localMountedDir), remoteStorageMountedLocation, util.FullPath(*dir), fileFiler, remoteStorageConf, *concurrency); err != nil {
-		return fmt.Errorf("cache content data: %v", err)
+	if err := c.cacheContentData(commandEnv, writer, util.FullPath(localMountedDir), remoteStorageMountedLocation, util.FullPath(dir), fileFiler, remoteStorageConf, concurrency); err != nil {
+		return fmt.Errorf("cache content data on %s: %v", localMountedDir, err)
 	}
 
 	return nil
@@ -130,7 +152,7 @@ func (c *commandRemoteCache) cacheContentData(commandEnv *CommandEnv, writer io.
 			return true // true means recursive traversal should continue
 		}
 
-		if fileFilter.matches(entry) {
+		if !fileFilter.matches(entry) {
 			return true
 		}
 
@@ -141,10 +163,10 @@ func (c *commandRemoteCache) cacheContentData(commandEnv *CommandEnv, writer io.
 
 			remoteLocation := filer.MapFullPathToRemoteStorageLocation(localMountedDir, remoteMountedLocation, dir.Child(entry.Name))
 
-			if err := filer.DownloadToLocal(commandEnv, remoteConf, remoteLocation, dir, entry); err != nil {
-				fmt.Fprintf(writer, "DownloadToLocal %+v: %v\n", remoteLocation, err)
+			if err := filer.CacheRemoteObjectToLocalCluster(commandEnv, remoteConf, remoteLocation, dir, entry); err != nil {
+				fmt.Fprintf(writer, "CacheRemoteObjectToLocalCluster %+v: %v\n", remoteLocation, err)
 				if executionErr == nil {
-					executionErr = fmt.Errorf("DownloadToLocal %+v: %v\n", remoteLocation, err)
+					executionErr = fmt.Errorf("CacheRemoteObjectToLocalCluster %+v: %v\n", remoteLocation, err)
 				}
 				return
 			}
diff --git a/weed/shell/command_remote_configure.go b/weed/shell/command_remote_configure.go
index b6c4af178..e15090190 100644
--- a/weed/shell/command_remote_configure.go
+++ b/weed/shell/command_remote_configure.go
@@ -7,6 +7,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/remote_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
@@ -33,12 +34,14 @@ func (c *commandRemoteConfigure) Help() string {
 	remote.configure
 
 	# set or update a configuration
-	remote.configure -name=cloud1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
-	remote.configure -name=cloud2 -type=gcs -gcs.appCredentialsFile=~/service-account-file.json
+	remote.configure -name=cloud1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy -s3.region=us-east-2
+	remote.configure -name=cloud2 -type=gcs -gcs.appCredentialsFile=~/service-account-file.json -gcs.projectId=yyy
 	remote.configure -name=cloud3 -type=azure -azure.account_name=xxx -azure.account_key=yyy
 	remote.configure -name=cloud4 -type=aliyun -aliyun.access_key=xxx -aliyun.secret_key=yyy -aliyun.endpoint=oss-cn-shenzhen.aliyuncs.com -aliyun.region=cn-sehnzhen
 	remote.configure -name=cloud5 -type=tencent -tencent.secret_id=xxx -tencent.secret_key=yyy -tencent.endpoint=cos.ap-guangzhou.myqcloud.com
 	remote.configure -name=cloud6 -type=wasabi -wasabi.access_key=xxx -wasabi.secret_key=yyy -wasabi.endpoint=s3.us-west-1.wasabisys.com -wasabi.region=us-west-1
+	remote.configure -name=cloud7 -type=storj -storj.access_key=xxx -storj.secret_key=yyy -storj.endpoint=https://gateway.us1.storjshare.io
+	remote.configure -name=cloud8 -type=filebase -filebase.access_key=xxx -filebase.secret_key=yyy -filebase.endpoint=https://s3.filebase.com
 
 	# delete one configuration
 	remote.configure -delete -name=cloud1
@@ -58,7 +61,7 @@ func (c *commandRemoteConfigure) Do(args []string, commandEnv *CommandEnv, write
 	isDelete := remoteConfigureCommand.Bool("delete", false, "delete one remote storage by its name")
 
 	remoteConfigureCommand.StringVar(&conf.Name, "name", "", "a short name to identify the remote storage")
-	remoteConfigureCommand.StringVar(&conf.Type, "type", "s3", "[s3|gcs|azure|b2|aliyun|tencent|baidu|wasabi|hdfs] storage type")
+	remoteConfigureCommand.StringVar(&conf.Type, "type", "s3", fmt.Sprintf("[%s] storage type", remote_storage.GetAllRemoteStorageNames()))
 
 	remoteConfigureCommand.StringVar(&conf.S3AccessKey, "s3.access_key", "", "s3 access key")
 	remoteConfigureCommand.StringVar(&conf.S3SecretKey, "s3.secret_key", "", "s3 secret key")
@@ -66,8 +69,10 @@ func (c *commandRemoteConfigure) Do(args []string, commandEnv *CommandEnv, write
 	remoteConfigureCommand.StringVar(&conf.S3Endpoint, "s3.endpoint", "", "endpoint for s3-compatible local object store")
 	remoteConfigureCommand.StringVar(&conf.S3StorageClass, "s3.storage_class", "", "s3 storage class")
 	remoteConfigureCommand.BoolVar(&conf.S3ForcePathStyle, "s3.force_path_style", true, "s3 force path style")
+	remoteConfigureCommand.BoolVar(&conf.S3V4Signature, "s3.v4_signature", false, "s3 V4 signature")
 
 	remoteConfigureCommand.StringVar(&conf.GcsGoogleApplicationCredentials, "gcs.appCredentialsFile", "", "google cloud storage credentials file, default to use env GOOGLE_APPLICATION_CREDENTIALS")
+	remoteConfigureCommand.StringVar(&conf.GcsProjectId, "gcs.projectId", "", "google cloud storage project id, default to use env GOOGLE_CLOUD_PROJECT")
 
 	remoteConfigureCommand.StringVar(&conf.AzureAccountName, "azure.account_name", "", "azure account name, default to use env AZURE_STORAGE_ACCOUNT")
 	remoteConfigureCommand.StringVar(&conf.AzureAccountKey, "azure.account_key", "", "azure account name, default to use env AZURE_STORAGE_ACCESS_KEY")
@@ -95,16 +100,13 @@ func (c *commandRemoteConfigure) Do(args []string, commandEnv *CommandEnv, write
 	remoteConfigureCommand.StringVar(&conf.WasabiEndpoint, "wasabi.endpoint", "", "Wasabi endpoint, see https://wasabi.com/wp-content/themes/wasabi/docs/API_Guide/index.html#t=topics%2Fapidiff-intro.htm")
 	remoteConfigureCommand.StringVar(&conf.WasabiRegion, "wasabi.region", "", "Wasabi region")
 
-	var namenodes arrayFlags
-	remoteConfigureCommand.Var(&namenodes, "hdfs.namenodes", "hdfs name node and port, example: namenode1:8020,namenode2:8020")
-	remoteConfigureCommand.StringVar(&conf.HdfsUsername, "hdfs.username", "", "hdfs user name")
-	remoteConfigureCommand.StringVar(&conf.HdfsServicePrincipalName, "hdfs.servicePrincipalName", "", `Kerberos service principal name for the namenode
-
-Example: hdfs/namenode.hadoop.docker
-Namenode running as service 'hdfs' with FQDN 'namenode.hadoop.docker'.
-`)
-	remoteConfigureCommand.StringVar(&conf.HdfsDataTransferProtection, "hdfs.dataTransferProtection", "", "[authentication|integrity|privacy] Kerberos data transfer protection")
+	remoteConfigureCommand.StringVar(&conf.FilebaseAccessKey, "filebase.access_key", "", "Filebase access key")
+	remoteConfigureCommand.StringVar(&conf.FilebaseSecretKey, "filebase.secret_key", "", "Filebase secret key")
+	remoteConfigureCommand.StringVar(&conf.FilebaseEndpoint, "filebase.endpoint", "", "Filebase endpoint, https://s3.filebase.com")
 
+	remoteConfigureCommand.StringVar(&conf.StorjAccessKey, "storj.access_key", "", "Storj access key")
+	remoteConfigureCommand.StringVar(&conf.StorjSecretKey, "storj.secret_key", "", "Storj secret key")
+	remoteConfigureCommand.StringVar(&conf.StorjEndpoint, "storj.endpoint", "", "Storj endpoint")
 
 	if err = remoteConfigureCommand.Parse(args); err != nil {
 		return nil
@@ -148,7 +150,14 @@ func (c *commandRemoteConfigure) listExistingRemoteStorages(commandEnv *CommandE
 			return fmt.Errorf("unmarshal %s/%s: %v", filer.DirectoryEtcRemote, entry.Name, err)
 		}
 
+		// change secret key to stars
 		conf.S3SecretKey = strings.Repeat("*", len(conf.S3SecretKey))
+		conf.AliyunSecretKey = strings.Repeat("*", len(conf.AliyunSecretKey))
+		conf.BaiduAccessKey = strings.Repeat("*", len(conf.BaiduAccessKey))
+		conf.FilebaseSecretKey = strings.Repeat("*", len(conf.FilebaseSecretKey))
+		conf.StorjSecretKey = strings.Repeat("*", len(conf.StorjSecretKey))
+		conf.TencentSecretKey = strings.Repeat("*", len(conf.TencentSecretKey))
+		conf.WasabiSecretKey = strings.Repeat("*", len(conf.WasabiSecretKey))
 
 		m := jsonpb.Marshaler{
 			EmitDefaults: false,
@@ -165,7 +174,7 @@ func (c *commandRemoteConfigure) listExistingRemoteStorages(commandEnv *CommandE
 
 func (c *commandRemoteConfigure) deleteRemoteStorage(commandEnv *CommandEnv, writer io.Writer, storageName string) error {
 
-	return commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.DeleteEntryRequest{
 			Directory:            filer.DirectoryEtcRemote,
@@ -195,7 +204,7 @@ func (c *commandRemoteConfigure) saveRemoteStorage(commandEnv *CommandEnv, write
 		return err
 	}
 
-	if err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	if err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 		return filer.SaveInsideFiler(client, filer.DirectoryEtcRemote, conf.Name+filer.REMOTE_STORAGE_CONF_SUFFIX, data)
 	}); err != nil && err != filer_pb.ErrNotFound {
 		return err
@@ -204,14 +213,3 @@ func (c *commandRemoteConfigure) saveRemoteStorage(commandEnv *CommandEnv, write
 	return nil
 
 }
-
-type arrayFlags []string
-
-func (i *arrayFlags) String() string {
-	return "my string representation"
-}
-
-func (i *arrayFlags) Set(value string) error {
-	*i = append(*i, value)
-	return nil
-}
diff --git a/weed/shell/command_remote_meta_sync.go b/weed/shell/command_remote_meta_sync.go
index 17b9abdb8..e09a66761 100644
--- a/weed/shell/command_remote_meta_sync.go
+++ b/weed/shell/command_remote_meta_sync.go
@@ -27,7 +27,7 @@ func (c *commandRemoteMetaSync) Help() string {
 	return `synchronize the local file meta data with the remote file metadata
 
 	# assume a remote storage is configured to name "cloud1"
-	remote.configure -name=cloud1 -type=s3 -access_key=xxx -secret_key=yyy
+	remote.configure -name=cloud1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
 	# mount and pull one bucket
 	remote.mount -dir=/xxx -remote=cloud1/bucket
 
@@ -62,7 +62,7 @@ func (c *commandRemoteMetaSync) Do(args []string, commandEnv *CommandEnv, writer
 
 	// pull metadata from remote
 	if err = pullMetadata(commandEnv, writer, util.FullPath(localMountedDir), remoteStorageMountedLocation, util.FullPath(*dir), remoteStorageConf); err != nil {
-		return fmt.Errorf("cache content data: %v", err)
+		return fmt.Errorf("cache meta data: %v", err)
 	}
 
 	return nil
@@ -76,7 +76,7 @@ func detectMountInfo(commandEnv *CommandEnv, writer io.Writer, dir string) (*rem
   This function update entry.RemoteEntry if the remote has any changes.
 
   To pull remote updates, or created for the first time, the criteria is:
-    entry == nil or (entry.RemoteEntry != nil and entry.RemoteEntry.RemoteTag != remote.RemoteTag)
+    entry == nil or (entry.RemoteEntry != nil and (entry.RemoteEntry.RemoteTag != remote.RemoteTag or entry.RemoteEntry.RemoteMTime < remote.RemoteMTime ))
   After the meta pull, the entry.RemoteEntry will have:
     remoteEntry.LastLocalSyncTsNs == 0
     Attributes.FileSize = uint64(remoteEntry.RemoteSize)
@@ -117,7 +117,7 @@ func pullMetadata(commandEnv *CommandEnv, writer io.Writer, localMountedDir util
 
 	remote := filer.MapFullPathToRemoteStorageLocation(localMountedDir, remoteMountedLocation, dirToCache)
 
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 		ctx := context.Background()
 		err = remoteStorage.Traverse(remote, func(remoteDir, name string, isDirectory bool, remoteEntry *filer_pb.RemoteEntry) error {
 			localDir := filer.MapRemoteStorageLocationPathToFullPath(localMountedDir, remoteMountedLocation, remoteDir)
diff --git a/weed/shell/command_remote_mount.go b/weed/shell/command_remote_mount.go
index 3e92428d9..019bc93c9 100644
--- a/weed/shell/command_remote_mount.go
+++ b/weed/shell/command_remote_mount.go
@@ -12,7 +12,9 @@ import (
 	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
 	"io"
+	"os"
 	"strings"
+	"time"
 )
 
 func init() {
@@ -30,7 +32,7 @@ func (c *commandRemoteMount) Help() string {
 	return `mount remote storage and pull its metadata
 
 	# assume a remote storage is configured to name "cloud1"
-	remote.configure -name=cloud1 -type=s3 -access_key=xxx -secret_key=yyy
+	remote.configure -name=cloud1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
 
 	# mount and pull one bucket
 	remote.mount -dir=/xxx -remote=cloud1/bucket
@@ -72,12 +74,12 @@ func (c *commandRemoteMount) Do(args []string, commandEnv *CommandEnv, writer io
 	}
 
 	// sync metadata from remote
-	if err = c.syncMetadata(commandEnv, writer, *dir, *nonEmpty, remoteConf, remoteStorageLocation); err != nil {
+	if err = syncMetadata(commandEnv, writer, *dir, *nonEmpty, remoteConf, remoteStorageLocation); err != nil {
 		return fmt.Errorf("pull metadata: %v", err)
 	}
 
 	// store a mount configuration in filer
-	if err = c.saveMountMapping(commandEnv, writer, *dir, remoteStorageLocation); err != nil {
+	if err = filer.InsertMountMapping(commandEnv, *dir, remoteStorageLocation); err != nil {
 		return fmt.Errorf("save mount mapping: %v", err)
 	}
 
@@ -112,24 +114,33 @@ func jsonPrintln(writer io.Writer, message proto.Message) error {
 	return err
 }
 
-func (c *commandRemoteMount) findRemoteStorageConfiguration(commandEnv *CommandEnv, writer io.Writer, remote *remote_pb.RemoteStorageLocation) (conf *remote_pb.RemoteConf, err error) {
-
-	return filer.ReadRemoteStorageConf(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress, remote.Name)
-
-}
-
-func (c *commandRemoteMount) syncMetadata(commandEnv *CommandEnv, writer io.Writer, dir string, nonEmpty bool, remoteConf *remote_pb.RemoteConf, remote *remote_pb.RemoteStorageLocation) error {
+func syncMetadata(commandEnv *CommandEnv, writer io.Writer, dir string, nonEmpty bool, remoteConf *remote_pb.RemoteConf, remote *remote_pb.RemoteStorageLocation) error {
 
 	// find existing directory, and ensure the directory is empty
-	err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 		parent, name := util.FullPath(dir).DirAndName()
 		_, lookupErr := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
 			Directory: parent,
 			Name:      name,
 		})
 		if lookupErr != nil {
-			if !strings.Contains(lookupErr.Error(), filer_pb.ErrNotFound.Error()) {
-				return fmt.Errorf("lookup %s: %v", dir, lookupErr)
+			if strings.Contains(lookupErr.Error(), filer_pb.ErrNotFound.Error()) {
+				_, createErr := client.CreateEntry(context.Background(), &filer_pb.CreateEntryRequest{
+					Directory: parent,
+					Entry: &filer_pb.Entry{
+						Name:        name,
+						IsDirectory: true,
+						Attributes: &filer_pb.FuseAttributes{
+							Mtime:    time.Now().Unix(),
+							Crtime:   time.Now().Unix(),
+							FileMode: uint32(0644 | os.ModeDir),
+						},
+						RemoteEntry: &filer_pb.RemoteEntry{
+							StorageName: remoteConf.Name,
+						},
+					},
+				})
+				return createErr
 			}
 		}
 
@@ -157,38 +168,7 @@ func (c *commandRemoteMount) syncMetadata(commandEnv *CommandEnv, writer io.Writ
 
 	// pull metadata from remote
 	if err = pullMetadata(commandEnv, writer, util.FullPath(dir), remote, util.FullPath(dir), remoteConf); err != nil {
-		return fmt.Errorf("cache content data: %v", err)
-	}
-
-	return nil
-}
-
-func (c *commandRemoteMount) saveMountMapping(commandEnv *CommandEnv, writer io.Writer, dir string, remoteStorageLocation *remote_pb.RemoteStorageLocation) (err error) {
-
-	// read current mapping
-	var oldContent, newContent []byte
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-		oldContent, err = filer.ReadInsideFiler(client, filer.DirectoryEtcRemote, filer.REMOTE_STORAGE_MOUNT_FILE)
-		return err
-	})
-	if err != nil {
-		if err != filer_pb.ErrNotFound {
-			return fmt.Errorf("read existing mapping: %v", err)
-		}
-	}
-
-	// add new mapping
-	newContent, err = filer.AddRemoteStorageMapping(oldContent, dir, remoteStorageLocation)
-	if err != nil {
-		return fmt.Errorf("add mapping %s~%s: %v", dir, remoteStorageLocation, err)
-	}
-
-	// save back
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-		return filer.SaveInsideFiler(client, filer.DirectoryEtcRemote, filer.REMOTE_STORAGE_MOUNT_FILE, newContent)
-	})
-	if err != nil {
-		return fmt.Errorf("save mapping: %v", err)
+		return fmt.Errorf("cache metadata: %v", err)
 	}
 
 	return nil
diff --git a/weed/shell/command_remote_mount_buckets.go b/weed/shell/command_remote_mount_buckets.go
new file mode 100644
index 000000000..3ed22936f
--- /dev/null
+++ b/weed/shell/command_remote_mount_buckets.go
@@ -0,0 +1,121 @@
+package shell
+
+import (
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/remote_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"io"
+	"path/filepath"
+	"regexp"
+)
+
+func init() {
+	Commands = append(Commands, &commandRemoteMountBuckets{})
+}
+
+type commandRemoteMountBuckets struct {
+}
+
+func (c *commandRemoteMountBuckets) Name() string {
+	return "remote.mount.buckets"
+}
+
+func (c *commandRemoteMountBuckets) Help() string {
+	return `mount all buckets in remote storage and pull its metadata
+
+	# assume a remote storage is configured to name "cloud1"
+	remote.configure -name=cloud1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
+
+	# mount all buckets
+	remote.mount.buckets -remote=cloud1
+
+	# after mount, start a separate process to write updates to remote storage
+	weed filer.remote.sync -filer=<filerHost>:<filerPort> -createBucketAt=cloud1
+
+`
+}
+
+func (c *commandRemoteMountBuckets) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	remoteMountBucketsCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+
+	remote := remoteMountBucketsCommand.String("remote", "", "an already configured storage name")
+	bucketPattern := remoteMountBucketsCommand.String("bucketPattern", "", "match existing bucket name with wildcard characters '*' and '?'")
+	trimBucketSuffix := remoteMountBucketsCommand.Bool("trimBucketSuffix", true, "remote suffix auto generated by 'weed filer.remote.sync'")
+	apply := remoteMountBucketsCommand.Bool("apply", false, "apply the mount for listed buckets")
+	if err = remoteMountBucketsCommand.Parse(args); err != nil {
+		return nil
+	}
+	infoAboutSimulationMode(writer, *apply, "-apply")
+
+	if *remote == "" {
+		_, err = listExistingRemoteStorageMounts(commandEnv, writer)
+		return err
+	}
+
+	// find configuration for remote storage
+	remoteConf, err := filer.ReadRemoteStorageConf(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress, *remote)
+	if err != nil {
+		return fmt.Errorf("find configuration for %s: %v", *remote, err)
+	}
+
+	// get storage client
+	remoteStorageClient, err := remote_storage.GetRemoteStorage(remoteConf)
+	if err != nil {
+		return fmt.Errorf("get storage client for %s: %v", *remote, err)
+	}
+
+	buckets, err := remoteStorageClient.ListBuckets()
+	if err != nil {
+		return fmt.Errorf("list buckets on %s: %v", *remote, err)
+	}
+
+	fillerBucketsPath, err := readFilerBucketsPath(commandEnv)
+	if err != nil {
+		return fmt.Errorf("read filer buckets path: %v", err)
+	}
+
+	hasSuffixPattern, _ := regexp.Compile(".+-[0-9][0-9][0-9][0-9]")
+
+	for _, bucket := range buckets {
+		if *bucketPattern != "" {
+			if matched, _ := filepath.Match(*bucketPattern, bucket.Name); !matched {
+				continue
+			}
+		}
+
+		fmt.Fprintf(writer, "bucket %s\n", bucket.Name)
+		localBucketName := bucket.Name
+		if *trimBucketSuffix {
+			if hasSuffixPattern.MatchString(localBucketName) {
+				localBucketName = localBucketName[:len(localBucketName)-5]
+				fmt.Fprintf(writer, "  mount bucket %s as %s\n", bucket.Name, localBucketName)
+			}
+		}
+		if *apply {
+
+			dir := util.FullPath(fillerBucketsPath).Child(localBucketName)
+			remoteStorageLocation := &remote_pb.RemoteStorageLocation{
+				Name:   *remote,
+				Bucket: bucket.Name,
+				Path:   "/",
+			}
+
+			// sync metadata from remote
+			if err = syncMetadata(commandEnv, writer, string(dir), true, remoteConf, remoteStorageLocation); err != nil {
+				return fmt.Errorf("pull metadata on %+v: %v", remoteStorageLocation, err)
+			}
+
+			// store a mount configuration in filer
+			if err = filer.InsertMountMapping(commandEnv, string(dir), remoteStorageLocation); err != nil {
+				return fmt.Errorf("save mount mapping %s to %+v: %v", dir, remoteStorageLocation, err)
+			}
+
+		}
+	}
+
+	return nil
+}
diff --git a/weed/shell/command_remote_uncache.go b/weed/shell/command_remote_uncache.go
index 369f2b3d4..a3433621e 100644
--- a/weed/shell/command_remote_uncache.go
+++ b/weed/shell/command_remote_uncache.go
@@ -4,12 +4,13 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/filer"
-	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
-	"github.com/chrislusf/seaweedfs/weed/util"
 	"io"
 	"path/filepath"
 	"strings"
+
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 func init() {
@@ -41,12 +42,12 @@ func (c *commandRemoteUncache) Help() string {
 
 func (c *commandRemoteUncache) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	remoteUnmountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	remoteUncacheCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 
-	dir := remoteUnmountCommand.String("dir", "", "a directory in filer")
-	fileFiler := newFileFilter(remoteUnmountCommand)
+	dir := remoteUncacheCommand.String("dir", "", "a directory in filer")
+	fileFiler := newFileFilter(remoteUncacheCommand)
 
-	if err = remoteUnmountCommand.Parse(args); err != nil {
+	if err = remoteUncacheCommand.Parse(args); err != nil {
 		return nil
 	}
 
@@ -54,27 +55,30 @@ func (c *commandRemoteUncache) Do(args []string, commandEnv *CommandEnv, writer
 	if listErr != nil {
 		return listErr
 	}
-	if *dir == "" {
-		jsonPrintln(writer, mappings)
-		fmt.Fprintln(writer, "need to specify '-dir' option")
-		return nil
-	}
+	if *dir != "" {
+		var localMountedDir string
+		for k := range mappings.Mappings {
+			if strings.HasPrefix(*dir, k) {
+				localMountedDir = k
+			}
+		}
+		if localMountedDir == "" {
+			jsonPrintln(writer, mappings)
+			fmt.Fprintf(writer, "%s is not mounted\n", *dir)
+			return nil
+		}
 
-	var localMountedDir string
-	for k := range mappings.Mappings {
-		if strings.HasPrefix(*dir, k) {
-			localMountedDir = k
+		// pull content from remote
+		if err = c.uncacheContentData(commandEnv, writer, util.FullPath(*dir), fileFiler); err != nil {
+			return fmt.Errorf("uncache content data: %v", err)
 		}
-	}
-	if localMountedDir == "" {
-		jsonPrintln(writer, mappings)
-		fmt.Fprintf(writer, "%s is not mounted\n", *dir)
 		return nil
 	}
 
-	// pull content from remote
-	if err = c.uncacheContentData(commandEnv, writer, util.FullPath(*dir), fileFiler); err != nil {
-		return fmt.Errorf("cache content data: %v", err)
+	for key, _ := range mappings.Mappings {
+		if err := c.uncacheContentData(commandEnv, writer, util.FullPath(key), fileFiler); err != nil {
+			return err
+		}
 	}
 
 	return nil
@@ -88,7 +92,7 @@ func (c *commandRemoteUncache) uncacheContentData(commandEnv *CommandEnv, writer
 			return true // true means recursive traversal should continue
 		}
 
-		if fileFilter.matches(entry) {
+		if !fileFilter.matches(entry) {
 			return true
 		}
 
@@ -101,7 +105,7 @@ func (c *commandRemoteUncache) uncacheContentData(commandEnv *CommandEnv, writer
 
 		fmt.Fprintf(writer, "Uncache %+v ... ", dir.Child(entry.Name))
 
-		err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 			_, updateErr := client.UpdateEntry(context.Background(), &filer_pb.UpdateEntryRequest{
 				Directory: string(dir),
 				Entry:     entry,
@@ -141,12 +145,12 @@ func newFileFilter(remoteMountCommand *flag.FlagSet) (ff *FileFilter) {
 func (ff *FileFilter) matches(entry *filer_pb.Entry) bool {
 	if *ff.include != "" {
 		if ok, _ := filepath.Match(*ff.include, entry.Name); !ok {
-			return true
+			return false
 		}
 	}
 	if *ff.exclude != "" {
 		if ok, _ := filepath.Match(*ff.exclude, entry.Name); ok {
-			return true
+			return false
 		}
 	}
 	if *ff.minSize != -1 {
@@ -169,5 +173,5 @@ func (ff *FileFilter) matches(entry *filer_pb.Entry) bool {
 			return false
 		}
 	}
-	return false
+	return true
 }
diff --git a/weed/shell/command_remote_unmount.go b/weed/shell/command_remote_unmount.go
index 9b61f5cfb..49b07f8f1 100644
--- a/weed/shell/command_remote_unmount.go
+++ b/weed/shell/command_remote_unmount.go
@@ -6,8 +6,10 @@ import (
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/remote_storage"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"io"
+	"time"
 )
 
 func init() {
@@ -25,14 +27,12 @@ func (c *commandRemoteUnmount) Help() string {
 	return `unmount remote storage
 
 	# assume a remote storage is configured to name "s3_1"
-	remote.configure -name=s3_1 -type=s3 -access_key=xxx -secret_key=yyy
+	remote.configure -name=s3_1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
 	# mount and pull one bucket
 	remote.mount -dir=/xxx -remote=s3_1/bucket
 
 	# unmount the mounted directory and remove its cache
-	# Make sure you have stopped "weed filer.remote.sync" first!
-	# Otherwise, the deletion will also be propagated to the remote storage!!!
-	remote.unmount -dir=/xxx -iHaveStoppedRemoteSync
+	remote.unmount -dir=/xxx
 
 `
 }
@@ -42,7 +42,6 @@ func (c *commandRemoteUnmount) Do(args []string, commandEnv *CommandEnv, writer
 	remoteMountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 
 	dir := remoteMountCommand.String("dir", "", "a directory in filer")
-	hasStoppedRemoteSync := remoteMountCommand.Bool("iHaveStoppedRemoteSync", false, "confirm to stop weed filer.remote.sync first")
 
 	if err = remoteMountCommand.Parse(args); err != nil {
 		return nil
@@ -61,17 +60,21 @@ func (c *commandRemoteUnmount) Do(args []string, commandEnv *CommandEnv, writer
 		return fmt.Errorf("directory %s is not mounted", *dir)
 	}
 
-	if !*hasStoppedRemoteSync {
-		return fmt.Errorf("make sure \"weed filer.remote.sync\" is stopped to avoid data loss")
+	// store a mount configuration in filer
+	fmt.Fprintf(writer, "deleting mount for %s ...\n", *dir)
+	if err = filer.DeleteMountMapping(commandEnv, *dir); err != nil {
+		return fmt.Errorf("delete mount mapping: %v", err)
 	}
+
 	// purge mounted data
+	fmt.Fprintf(writer, "purge %s ...\n", *dir)
 	if err = c.purgeMountedData(commandEnv, *dir); err != nil {
 		return fmt.Errorf("purge mounted data: %v", err)
 	}
 
-	// store a mount configuration in filer
-	if err = c.deleteMountMapping(commandEnv, *dir); err != nil {
-		return fmt.Errorf("delete mount mapping: %v", err)
+	// reset remote sync offset in case the folder is mounted again
+	if err = remote_storage.SetSyncOffset(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress, *dir, time.Now().UnixNano()); err != nil {
+		return fmt.Errorf("reset remote.sync offset for %s: %v", *dir, err)
 	}
 
 	return nil
@@ -80,7 +83,7 @@ func (c *commandRemoteUnmount) Do(args []string, commandEnv *CommandEnv, writer
 func (c *commandRemoteUnmount) purgeMountedData(commandEnv *CommandEnv, dir string) error {
 
 	// find existing directory, and ensure the directory is empty
-	err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 		parent, name := util.FullPath(dir).DirAndName()
 		lookupResp, lookupErr := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
 			Directory: parent,
@@ -100,6 +103,8 @@ func (c *commandRemoteUnmount) purgeMountedData(commandEnv *CommandEnv, dir stri
 		mkdirErr := filer_pb.DoMkdir(client, parent, name, func(entry *filer_pb.Entry) {
 			entry.Attributes = oldEntry.Attributes
 			entry.Extended = oldEntry.Extended
+			entry.Attributes.Crtime = time.Now().Unix()
+			entry.Attributes.Mtime = time.Now().Unix()
 		})
 		if mkdirErr != nil {
 			return fmt.Errorf("mkdir %s: %v", dir, mkdirErr)
@@ -113,34 +118,3 @@ func (c *commandRemoteUnmount) purgeMountedData(commandEnv *CommandEnv, dir stri
 
 	return nil
 }
-
-func (c *commandRemoteUnmount) deleteMountMapping(commandEnv *CommandEnv, dir string) (err error) {
-
-	// read current mapping
-	var oldContent, newContent []byte
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-		oldContent, err = filer.ReadInsideFiler(client, filer.DirectoryEtcRemote, filer.REMOTE_STORAGE_MOUNT_FILE)
-		return err
-	})
-	if err != nil {
-		if err != filer_pb.ErrNotFound {
-			return fmt.Errorf("read existing mapping: %v", err)
-		}
-	}
-
-	// add new mapping
-	newContent, err = filer.RemoveRemoteStorageMapping(oldContent, dir)
-	if err != nil {
-		return fmt.Errorf("delete mount %s: %v", dir, err)
-	}
-
-	// save back
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
-		return filer.SaveInsideFiler(client, filer.DirectoryEtcRemote, filer.REMOTE_STORAGE_MOUNT_FILE, newContent)
-	})
-	if err != nil {
-		return fmt.Errorf("save mapping: %v", err)
-	}
-
-	return nil
-}
diff --git a/weed/shell/command_s3_bucket_create.go b/weed/shell/command_s3_bucket_create.go
index a512ffc4a..ffee40be5 100644
--- a/weed/shell/command_s3_bucket_create.go
+++ b/weed/shell/command_s3_bucket_create.go
@@ -26,7 +26,7 @@ func (c *commandS3BucketCreate) Help() string {
 	return `create a bucket with a given name
 
 	Example:
-		s3.bucket.create -name <bucket_name> -replication 001
+		s3.bucket.create -name <bucket_name>
 `
 }
 
@@ -34,9 +34,6 @@ func (c *commandS3BucketCreate) Do(args []string, commandEnv *CommandEnv, writer
 
 	bucketCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	bucketName := bucketCommand.String("name", "", "bucket name")
-	replication := bucketCommand.String("replication", "", "replication setting for the bucket, if not set "+
-		"it will honor the value defined by the filer if it exists, "+
-		"else it will honor the value defined on the master")
 	if err = bucketCommand.Parse(args); err != nil {
 		return nil
 	}
@@ -45,7 +42,7 @@ func (c *commandS3BucketCreate) Do(args []string, commandEnv *CommandEnv, writer
 		return fmt.Errorf("empty bucket name")
 	}
 
-	err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 		if err != nil {
@@ -59,11 +56,9 @@ func (c *commandS3BucketCreate) Do(args []string, commandEnv *CommandEnv, writer
 			Name:        *bucketName,
 			IsDirectory: true,
 			Attributes: &filer_pb.FuseAttributes{
-				Mtime:       time.Now().Unix(),
-				Crtime:      time.Now().Unix(),
-				FileMode:    uint32(0777 | os.ModeDir),
-				Collection:  *bucketName,
-				Replication: *replication,
+				Mtime:    time.Now().Unix(),
+				Crtime:   time.Now().Unix(),
+				FileMode: uint32(0777 | os.ModeDir),
 			},
 		}
 
diff --git a/weed/shell/command_s3_bucket_delete.go b/weed/shell/command_s3_bucket_delete.go
index 26953c249..5f8585b0b 100644
--- a/weed/shell/command_s3_bucket_delete.go
+++ b/weed/shell/command_s3_bucket_delete.go
@@ -52,7 +52,7 @@ func (c *commandS3BucketDelete) Do(args []string, commandEnv *CommandEnv, writer
 	}
 
 	// delete the collection directly first
-	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
 		_, err = client.CollectionDelete(context.Background(), &master_pb.CollectionDeleteRequest{
 			Name: *bucketName,
 		})
diff --git a/weed/shell/command_s3_bucket_list.go b/weed/shell/command_s3_bucket_list.go
index 0c4e8d18f..09bde08b9 100644
--- a/weed/shell/command_s3_bucket_list.go
+++ b/weed/shell/command_s3_bucket_list.go
@@ -34,6 +34,14 @@ func (c *commandS3BucketList) Do(args []string, commandEnv *CommandEnv, writer i
 		return nil
 	}
 
+	// collect collection information
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
+	if err != nil {
+		return err
+	}
+	collectionInfos := make(map[string]*CollectionInfo)
+	collectCollectionInfo(topologyInfo, collectionInfos)
+
 	_, parseErr := commandEnv.parseUrl(findInputDirectory(bucketCommand.Args()))
 	if parseErr != nil {
 		return parseErr
@@ -49,11 +57,17 @@ func (c *commandS3BucketList) Do(args []string, commandEnv *CommandEnv, writer i
 		if !entry.IsDirectory {
 			return nil
 		}
-		if entry.Attributes.Replication == "" || entry.Attributes.Replication == "000" {
-			fmt.Fprintf(writer, "  %s\n", entry.Name)
-		} else {
-			fmt.Fprintf(writer, "  %s\t\t\treplication: %s\n", entry.Name, entry.Attributes.Replication)
+		collection := entry.Name
+		var collectionSize, fileCount float64
+		if collectionInfo, found := collectionInfos[collection]; found {
+			collectionSize = collectionInfo.Size
+			fileCount = collectionInfo.FileCount - collectionInfo.DeleteCount
+		}
+		fmt.Fprintf(writer, "  %s\tsize:%.0f\tfile:%.0f", entry.Name, collectionSize, fileCount)
+		if entry.Quota > 0 {
+			fmt.Fprintf(writer, "\tquota:%d\tusage:%.2f%%", entry.Quota, float64(collectionSize)*100/float64(entry.Quota))
 		}
+		fmt.Fprintln(writer)
 		return nil
 	}, "", false, math.MaxUint32)
 	if err != nil {
@@ -65,7 +79,7 @@ func (c *commandS3BucketList) Do(args []string, commandEnv *CommandEnv, writer i
 }
 
 func readFilerBucketsPath(filerClient filer_pb.FilerClient) (filerBucketsPath string, err error) {
-	err = filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = filerClient.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
 		resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 		if err != nil {
diff --git a/weed/shell/command_s3_bucket_quota.go b/weed/shell/command_s3_bucket_quota.go
new file mode 100644
index 000000000..17be1d5b0
--- /dev/null
+++ b/weed/shell/command_s3_bucket_quota.go
@@ -0,0 +1,93 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandS3BucketQuota{})
+}
+
+type commandS3BucketQuota struct {
+}
+
+func (c *commandS3BucketQuota) Name() string {
+	return "s3.bucket.quota"
+}
+
+func (c *commandS3BucketQuota) Help() string {
+	return `set/remove/enable/disable quota for a bucket
+
+	Example:
+		s3.bucket.quota -name=<bucket_name> -operation=set -sizeMB=1024
+`
+}
+
+func (c *commandS3BucketQuota) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	bucketCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	bucketName := bucketCommand.String("name", "", "bucket name")
+	operationName := bucketCommand.String("op", "set", "operation name [set|remove|enable|disable]")
+	sizeMB := bucketCommand.Int64("sizeMB", 0, "bucket quota size in MiB")
+	if err = bucketCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	if *bucketName == "" {
+		return fmt.Errorf("empty bucket name")
+	}
+
+	err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
+
+		ctx := context.Background()
+
+		resp, err := client.GetFilerConfiguration(ctx, &filer_pb.GetFilerConfigurationRequest{})
+		if err != nil {
+			return fmt.Errorf("get filer configuration: %v", err)
+		}
+		filerBucketsPath := resp.DirBuckets
+
+		lookupResp, err := client.LookupDirectoryEntry(ctx, &filer_pb.LookupDirectoryEntryRequest{
+			Directory: filerBucketsPath,
+			Name:      *bucketName,
+		})
+		if err != nil {
+			return fmt.Errorf("did not find bucket %s: %v", *bucketName, err)
+		}
+		bucketEntry := lookupResp.Entry
+
+		switch *operationName {
+		case "set":
+			bucketEntry.Quota = *sizeMB * 1024 * 1024
+		case "remove":
+			bucketEntry.Quota = 0
+		case "enable":
+			if bucketEntry.Quota < 0 {
+				bucketEntry.Quota = -bucketEntry.Quota
+			}
+		case "disable":
+			if bucketEntry.Quota > 0 {
+				bucketEntry.Quota = -bucketEntry.Quota
+			}
+		}
+
+		if err := filer_pb.UpdateEntry(client, &filer_pb.UpdateEntryRequest{
+			Directory: filerBucketsPath,
+			Entry:     bucketEntry,
+		}); err != nil {
+			return err
+		}
+
+		println("updated quota for bucket", *bucketName)
+
+		return nil
+
+	})
+
+	return err
+
+}
diff --git a/weed/shell/command_s3_bucket_quota_check.go b/weed/shell/command_s3_bucket_quota_check.go
new file mode 100644
index 000000000..f2a0d14f9
--- /dev/null
+++ b/weed/shell/command_s3_bucket_quota_check.go
@@ -0,0 +1,137 @@
+package shell
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"io"
+	"math"
+)
+
+func init() {
+	Commands = append(Commands, &commandS3BucketQuotaEnforce{})
+}
+
+type commandS3BucketQuotaEnforce struct {
+}
+
+func (c *commandS3BucketQuotaEnforce) Name() string {
+	return "s3.bucket.quota.enforce"
+}
+
+func (c *commandS3BucketQuotaEnforce) Help() string {
+	return `check quota for all buckets, make the bucket read only if over the limit
+
+	Example:
+		s3.bucket.quota.enforce -apply
+`
+}
+
+func (c *commandS3BucketQuotaEnforce) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	bucketCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	applyQuotaLimit := bucketCommand.Bool("apply", false, "actually change the buckets readonly attribute")
+	if err = bucketCommand.Parse(args); err != nil {
+		return nil
+	}
+	infoAboutSimulationMode(writer, *applyQuotaLimit, "-apply")
+
+	// collect collection information
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
+	if err != nil {
+		return err
+	}
+	collectionInfos := make(map[string]*CollectionInfo)
+	collectCollectionInfo(topologyInfo, collectionInfos)
+
+	// read buckets path
+	var filerBucketsPath string
+	filerBucketsPath, err = readFilerBucketsPath(commandEnv)
+	if err != nil {
+		return fmt.Errorf("read buckets: %v", err)
+	}
+
+	// read existing filer configuration
+	fc, err := filer.ReadFilerConf(commandEnv.option.FilerAddress, commandEnv.option.GrpcDialOption, commandEnv.MasterClient)
+	if err != nil {
+		return err
+	}
+
+	// process each bucket
+	hasConfChanges := false
+	err = filer_pb.List(commandEnv, filerBucketsPath, "", func(entry *filer_pb.Entry, isLast bool) error {
+		if !entry.IsDirectory {
+			return nil
+		}
+		collection := entry.Name
+		var collectionSize float64
+		if collectionInfo, found := collectionInfos[collection]; found {
+			collectionSize = collectionInfo.Size
+		}
+		if c.processEachBucket(fc, filerBucketsPath, entry, writer, collectionSize) {
+			hasConfChanges = true
+		}
+		return nil
+	}, "", false, math.MaxUint32)
+	if err != nil {
+		return fmt.Errorf("list buckets under %v: %v", filerBucketsPath, err)
+	}
+
+	// apply the configuration changes
+	if hasConfChanges && *applyQuotaLimit {
+
+		var buf2 bytes.Buffer
+		fc.ToText(&buf2)
+
+		if err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
+			return filer.SaveInsideFiler(client, filer.DirectoryEtcSeaweedFS, filer.FilerConfName, buf2.Bytes())
+		}); err != nil && err != filer_pb.ErrNotFound {
+			return err
+		}
+	}
+
+	return err
+
+}
+
+func (c *commandS3BucketQuotaEnforce) processEachBucket(fc *filer.FilerConf, filerBucketsPath string, entry *filer_pb.Entry, writer io.Writer, collectionSize float64) (hasConfChanges bool) {
+
+	locPrefix := filerBucketsPath + "/" + entry.Name + "/"
+	locConf := fc.MatchStorageRule(locPrefix)
+	locConf.LocationPrefix = locPrefix
+
+	if entry.Quota > 0 {
+		if locConf.ReadOnly {
+			if collectionSize < float64(entry.Quota) {
+				locConf.ReadOnly = false
+				hasConfChanges = true
+			}
+		} else {
+			if collectionSize > float64(entry.Quota) {
+				locConf.ReadOnly = true
+				hasConfChanges = true
+			}
+		}
+	} else {
+		if locConf.ReadOnly {
+			locConf.ReadOnly = false
+			hasConfChanges = true
+		}
+	}
+
+	if hasConfChanges {
+		fmt.Fprintf(writer, "  %s\tsize:%.0f", entry.Name, collectionSize)
+		fmt.Fprintf(writer, "\tquota:%d\tusage:%.2f%%", entry.Quota, collectionSize*100/float64(entry.Quota))
+		fmt.Fprintln(writer)
+		if locConf.ReadOnly {
+			fmt.Fprintf(writer, "    changing bucket %s to read only!\n", entry.Name)
+		} else {
+			fmt.Fprintf(writer, "    changing bucket %s to writable.\n", entry.Name)
+		}
+		fc.AddLocationConf(locConf)
+	}
+
+	return
+}
diff --git a/weed/shell/command_s3_circuitbreaker.go b/weed/shell/command_s3_circuitbreaker.go
new file mode 100644
index 000000000..7e11153bf
--- /dev/null
+++ b/weed/shell/command_s3_circuitbreaker.go
@@ -0,0 +1,358 @@
+package shell
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/filer"
+	"github.com/chrislusf/seaweedfs/weed/pb/s3_pb"
+	"github.com/chrislusf/seaweedfs/weed/s3api/s3_constants"
+	"io"
+	"strconv"
+	"strings"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+)
+
+var LoadConfig = loadConfig
+
+func init() {
+	Commands = append(Commands, &commandS3CircuitBreaker{})
+}
+
+type commandS3CircuitBreaker struct {
+}
+
+func (c *commandS3CircuitBreaker) Name() string {
+	return "s3.circuitBreaker"
+}
+
+func (c *commandS3CircuitBreaker) Help() string {
+	return `configure and apply s3 circuit breaker options for each bucket
+
+	# examples
+	# add circuit breaker config for global
+	s3.circuitBreaker -global -type count -actions Read,Write -values 500,200 -apply
+
+	# disable global config
+	s3.circuitBreaker -global -disable -apply
+
+	# add circuit breaker config for buckets x,y,z
+	s3.circuitBreaker -buckets x,y,z -type count -actions Read,Write -values 200,100 -apply
+
+	# disable circuit breaker config of x
+	s3.circuitBreaker -buckets x -disable -apply
+
+	# delete circuit breaker config of x
+	s3.circuitBreaker -buckets x -delete -apply
+
+	# clear all circuit breaker config
+	s3.circuitBreaker -delete -apply
+	`
+}
+
+func (c *commandS3CircuitBreaker) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+	dir := s3_constants.CircuitBreakerConfigDir
+	file := s3_constants.CircuitBreakerConfigFile
+
+	s3CircuitBreakerCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	buckets := s3CircuitBreakerCommand.String("buckets", "", "the bucket name(s) to configure, eg: -buckets x,y,z")
+	global := s3CircuitBreakerCommand.Bool("global", false, "configure global circuit breaker")
+
+	actions := s3CircuitBreakerCommand.String("actions", "", "comma separated actions names: Read,Write,List,Tagging,Admin")
+	limitType := s3CircuitBreakerCommand.String("type", "", "'Count' or 'MB'; Count represents the number of simultaneous requests, and MB represents the content size of all simultaneous requests")
+	values := s3CircuitBreakerCommand.String("values", "", "comma separated values")
+
+	disabled := s3CircuitBreakerCommand.Bool("disable", false, "disable global or buckets circuit breaker")
+	deleted := s3CircuitBreakerCommand.Bool("delete", false, "delete circuit breaker config")
+
+	apply := s3CircuitBreakerCommand.Bool("apply", false, "update and apply current configuration")
+
+	if err = s3CircuitBreakerCommand.Parse(args); err != nil {
+		return nil
+
+	}
+
+	var buf bytes.Buffer
+	err = LoadConfig(commandEnv, dir, file, &buf)
+	if err != nil {
+		return err
+	}
+
+	cbCfg := &s3_pb.S3CircuitBreakerConfig{
+		Buckets: make(map[string]*s3_pb.S3CircuitBreakerOptions),
+	}
+	if buf.Len() > 0 {
+		if err = filer.ParseS3ConfigurationFromBytes(buf.Bytes(), cbCfg); err != nil {
+			return err
+		}
+	}
+
+	if *deleted {
+		cmdBuckets, cmdActions, _, err := c.initActionsAndValues(buckets, actions, limitType, values, true)
+		if err != nil {
+			return err
+		}
+
+		if len(cmdBuckets) <= 0 && !*global {
+			if len(cmdActions) > 0 {
+				deleteGlobalActions(cbCfg, cmdActions, limitType)
+				if cbCfg.Buckets != nil {
+					var allBuckets []string
+					for bucket := range cbCfg.Buckets {
+						allBuckets = append(allBuckets, bucket)
+					}
+					deleteBucketsActions(allBuckets, cbCfg, cmdActions, limitType)
+				}
+			} else {
+				cbCfg.Global = nil
+				cbCfg.Buckets = nil
+			}
+		} else {
+			if len(cmdBuckets) > 0 {
+				deleteBucketsActions(cmdBuckets, cbCfg, cmdActions, limitType)
+			}
+			if *global {
+				deleteGlobalActions(cbCfg, cmdActions, nil)
+			}
+		}
+	} else {
+		cmdBuckets, cmdActions, cmdValues, err := c.initActionsAndValues(buckets, actions, limitType, values, *disabled)
+		if err != nil {
+			return err
+		}
+
+		if len(cmdActions) > 0 && len(*buckets) <= 0 && !*global {
+			return fmt.Errorf("one of -global and -buckets must be specified")
+		}
+
+		if len(*buckets) > 0 {
+			for _, bucket := range cmdBuckets {
+				var cbOptions *s3_pb.S3CircuitBreakerOptions
+				var exists bool
+				if cbOptions, exists = cbCfg.Buckets[bucket]; !exists {
+					cbOptions = &s3_pb.S3CircuitBreakerOptions{}
+					cbCfg.Buckets[bucket] = cbOptions
+				}
+				cbOptions.Enabled = !*disabled
+
+				if len(cmdActions) > 0 {
+					err = insertOrUpdateValues(cbOptions, cmdActions, cmdValues, limitType)
+					if err != nil {
+						return err
+					}
+				}
+
+				if len(cbOptions.Actions) <= 0 && !cbOptions.Enabled {
+					delete(cbCfg.Buckets, bucket)
+				}
+			}
+		}
+
+		if *global {
+			globalOptions := cbCfg.Global
+			if globalOptions == nil {
+				globalOptions = &s3_pb.S3CircuitBreakerOptions{Actions: make(map[string]int64, len(cmdActions))}
+				cbCfg.Global = globalOptions
+			}
+			globalOptions.Enabled = !*disabled
+
+			if len(cmdActions) > 0 {
+				err = insertOrUpdateValues(globalOptions, cmdActions, cmdValues, limitType)
+				if err != nil {
+					return err
+				}
+			}
+
+			if len(globalOptions.Actions) <= 0 && !globalOptions.Enabled {
+				cbCfg.Global = nil
+			}
+		}
+	}
+
+	buf.Reset()
+	err = filer.ProtoToText(&buf, cbCfg)
+	if err != nil {
+		return err
+	}
+
+	_, _ = fmt.Fprintf(writer, string(buf.Bytes()))
+	_, _ = fmt.Fprintln(writer)
+
+	if *apply {
+		if err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
+			return filer.SaveInsideFiler(client, dir, file, buf.Bytes())
+		}); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func loadConfig(commandEnv *CommandEnv, dir string, file string, buf *bytes.Buffer) error {
+	if err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
+		return filer.ReadEntry(commandEnv.MasterClient, client, dir, file, buf)
+	}); err != nil && err != filer_pb.ErrNotFound {
+		return err
+	}
+	return nil
+}
+
+func insertOrUpdateValues(cbOptions *s3_pb.S3CircuitBreakerOptions, cmdActions []string, cmdValues []int64, limitType *string) error {
+	if len(*limitType) == 0 {
+		return fmt.Errorf("type not valid, only 'count' and 'bytes' are allowed")
+	}
+
+	if cbOptions.Actions == nil {
+		cbOptions.Actions = make(map[string]int64, len(cmdActions))
+	}
+
+	if len(cmdValues) > 0 {
+		for i, action := range cmdActions {
+			cbOptions.Actions[s3_constants.Concat(action, *limitType)] = cmdValues[i]
+		}
+	}
+	return nil
+}
+
+func deleteBucketsActions(cmdBuckets []string, cbCfg *s3_pb.S3CircuitBreakerConfig, cmdActions []string, limitType *string) {
+	if cbCfg.Buckets == nil {
+		return
+	}
+
+	if len(cmdActions) == 0 {
+		for _, bucket := range cmdBuckets {
+			delete(cbCfg.Buckets, bucket)
+		}
+	} else {
+		for _, bucket := range cmdBuckets {
+			if cbOption, ok := cbCfg.Buckets[bucket]; ok {
+				if len(cmdActions) > 0 && cbOption.Actions != nil {
+					for _, action := range cmdActions {
+						delete(cbOption.Actions, s3_constants.Concat(action, *limitType))
+					}
+				}
+
+				if len(cbOption.Actions) == 0 && !cbOption.Enabled {
+					delete(cbCfg.Buckets, bucket)
+				}
+			}
+		}
+	}
+
+	if len(cbCfg.Buckets) == 0 {
+		cbCfg.Buckets = nil
+	}
+}
+
+func deleteGlobalActions(cbCfg *s3_pb.S3CircuitBreakerConfig, cmdActions []string, limitType *string) {
+	globalOptions := cbCfg.Global
+	if globalOptions == nil {
+		return
+	}
+
+	if len(cmdActions) == 0 && globalOptions.Actions != nil {
+		globalOptions.Actions = nil
+		return
+	} else {
+		for _, action := range cmdActions {
+			delete(globalOptions.Actions, s3_constants.Concat(action, *limitType))
+		}
+	}
+
+	if len(globalOptions.Actions) == 0 && !globalOptions.Enabled {
+		cbCfg.Global = nil
+	}
+}
+
+func (c *commandS3CircuitBreaker) initActionsAndValues(buckets, actions, limitType, values *string, parseValues bool) (cmdBuckets, cmdActions []string, cmdValues []int64, err error) {
+	if len(*buckets) > 0 {
+		cmdBuckets = strings.Split(*buckets, ",")
+	}
+
+	if len(*actions) > 0 {
+		cmdActions = strings.Split(*actions, ",")
+
+		//check action valid
+		for _, action := range cmdActions {
+			var found bool
+			for _, allowedAction := range s3_constants.AllowedActions {
+				if allowedAction == action {
+					found = true
+				}
+			}
+			if !found {
+				return nil, nil, nil, fmt.Errorf("value(%s) of flag[-action] not valid, allowed actions: %v", *actions, s3_constants.AllowedActions)
+			}
+		}
+	}
+
+	if !parseValues {
+		if len(cmdActions) < 0 {
+			for _, action := range s3_constants.AllowedActions {
+				cmdActions = append(cmdActions, action)
+			}
+		}
+
+		if len(*limitType) > 0 {
+			switch *limitType {
+			case s3_constants.LimitTypeCount:
+				elements := strings.Split(*values, ",")
+				if len(cmdActions) != len(elements) {
+					if len(elements) != 1 || len(elements) == 0 {
+						return nil, nil, nil, fmt.Errorf("count of flag[-actions] and flag[-counts] not equal")
+					}
+					v, err := strconv.Atoi(elements[0])
+					if err != nil {
+						return nil, nil, nil, fmt.Errorf("value of -values must be a legal number(s)")
+					}
+					for range cmdActions {
+						cmdValues = append(cmdValues, int64(v))
+					}
+				} else {
+					for _, value := range elements {
+						v, err := strconv.Atoi(value)
+						if err != nil {
+							return nil, nil, nil, fmt.Errorf("value of -values must be a legal number(s)")
+						}
+						cmdValues = append(cmdValues, int64(v))
+					}
+				}
+			case s3_constants.LimitTypeBytes:
+				elements := strings.Split(*values, ",")
+				if len(cmdActions) != len(elements) {
+					if len(elements) != 1 || len(elements) == 0 {
+						return nil, nil, nil, fmt.Errorf("values count of -actions and -values not equal")
+					}
+					v, err := parseMBToBytes(elements[0])
+					if err != nil {
+						return nil, nil, nil, fmt.Errorf("value of -max must be a legal number(s)")
+					}
+					for range cmdActions {
+						cmdValues = append(cmdValues, v)
+					}
+				} else {
+					for _, value := range elements {
+						v, err := parseMBToBytes(value)
+						if err != nil {
+							return nil, nil, nil, fmt.Errorf("value of -max must be a legal number(s)")
+						}
+						cmdValues = append(cmdValues, v)
+					}
+				}
+			default:
+				return nil, nil, nil, fmt.Errorf("type not valid, only 'count' and 'bytes' are allowed")
+			}
+		} else {
+			*limitType = ""
+		}
+	}
+	return cmdBuckets, cmdActions, cmdValues, nil
+}
+
+func parseMBToBytes(valStr string) (int64, error) {
+	v, err := strconv.Atoi(valStr)
+	v *= 1024 * 1024
+	return int64(v), err
+}
diff --git a/weed/shell/command_s3_circuitbreaker_test.go b/weed/shell/command_s3_circuitbreaker_test.go
new file mode 100644
index 000000000..3d0b4ac6e
--- /dev/null
+++ b/weed/shell/command_s3_circuitbreaker_test.go
@@ -0,0 +1,292 @@
+package shell
+
+import (
+	"bytes"
+	"encoding/json"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+type Case struct {
+	args   []string
+	result string
+}
+
+var (
+	TestCases = []*Case{
+		//add circuit breaker config for global
+		{
+			args: strings.Split("-global -type Count -actions Read,Write -values 500,200", " "),
+			result: `{
+				"global": {
+					"enabled": true,
+					"actions": {
+						"Read:Count": "500",
+						"Write:Count": "200"
+					}
+				}
+			}`,
+		},
+
+		//disable global config
+		{
+			args: strings.Split("-global -disable", " "),
+			result: `{
+				"global": {
+					"actions": {
+						"Read:Count": "500",
+						"Write:Count": "200"
+					}
+				}
+			}`,
+		},
+
+		//add circuit breaker config for buckets x,y,z
+		{
+			args: strings.Split("-buckets x,y,z -type Count -actions Read,Write -values 200,100", " "),
+			result: `{
+				"global": {
+					"actions": {
+						"Read:Count": "500",
+						"Write:Count": "200"
+					}
+				},
+				"buckets": {
+					"x": {
+						"enabled": true,
+						"actions": {
+							"Read:Count": "200",
+							"Write:Count": "100"
+						}
+					},
+					"y": {
+						"enabled": true,
+						"actions": {
+							"Read:Count": "200",
+							"Write:Count": "100"
+						}
+					},
+					"z": {
+						"enabled": true,
+						"actions": {
+							"Read:Count": "200",
+							"Write:Count": "100"
+						}
+					}
+				}
+			}`,
+		},
+
+		//disable circuit breaker config of x
+		{
+			args: strings.Split("-buckets x -disable", " "),
+			result: `{
+			  "global": {
+				"actions": {
+				  "Read:Count": "500",
+				  "Write:Count": "200"
+				}
+			  },
+			  "buckets": {
+				"x": {
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				},
+				"y": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				},
+				"z": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				}
+			  }
+			}`,
+		},
+
+		//delete circuit breaker config of x
+		{
+			args: strings.Split("-buckets x -delete", " "),
+			result: `{
+			  "global": {
+				"actions": {
+				  "Read:Count": "500",
+				  "Write:Count": "200"
+				}
+			  },
+			  "buckets": {
+				"y": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				},
+				"z": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				}
+			  }
+			}`,
+		},
+
+		//configure the circuit breaker for the size of the uploaded file for bucket x,y
+		{
+			args: strings.Split("-buckets x,y -type MB -actions Write -values 1024", " "),
+			result: `{
+			  "global": {
+				"actions": {
+				  "Read:Count": "500",
+				  "Write:Count": "200"
+				}
+			  },
+			  "buckets": {
+				"x": {
+				  "enabled": true,
+				  "actions": {
+					"Write:MB": "1073741824"
+				  }
+				},
+				"y": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100",
+					"Write:MB": "1073741824"
+				  }
+				},
+				"z": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				}
+			  }
+			}`,
+		},
+
+		//delete the circuit breaker configuration for the size of the uploaded file of bucket x,y
+		{
+			args: strings.Split("-buckets x,y -type MB -actions Write -delete", " "),
+			result: `{
+			  "global": {
+				"actions": {
+				  "Read:Count": "500",
+				  "Write:Count": "200"
+				}
+			  },
+			  "buckets": {
+				"x": {
+				  "enabled": true
+				},
+				"y": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				},
+				"z": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				}
+			  }
+			}`,
+		},
+
+		//enable global circuit breaker config (without -disable flag)
+		{
+			args: strings.Split("-global", " "),
+			result: `{
+			  "global": {
+				"enabled": true,
+				"actions": {
+				  "Read:Count": "500",
+				  "Write:Count": "200"
+				}
+			  },
+			  "buckets": {
+				"x": {
+				  "enabled": true
+				},
+				"y": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				},
+				"z": {
+				  "enabled": true,
+				  "actions": {
+					"Read:Count": "200",
+					"Write:Count": "100"
+				  }
+				}
+			  }
+			}`,
+		},
+
+		//clear all circuit breaker config
+		{
+			args: strings.Split("-delete", " "),
+			result: `{
+			
+			}`,
+		},
+	}
+)
+
+func TestCircuitBreakerShell(t *testing.T) {
+	var writeBuf bytes.Buffer
+	cmd := &commandS3CircuitBreaker{}
+	LoadConfig = func(commandEnv *CommandEnv, dir string, file string, buf *bytes.Buffer) error {
+		_, err := buf.Write(writeBuf.Bytes())
+		if err != nil {
+			return err
+		}
+		writeBuf.Reset()
+		return nil
+	}
+
+	for i, tc := range TestCases {
+		err := cmd.Do(tc.args, nil, &writeBuf)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if i != 0 {
+			result := writeBuf.String()
+
+			actual := make(map[string]interface{})
+			err := json.Unmarshal([]byte(result), &actual)
+			if err != nil {
+				t.Error(err)
+			}
+
+			expect := make(map[string]interface{})
+			err = json.Unmarshal([]byte(result), &expect)
+			if err != nil {
+				t.Error(err)
+			}
+			if !reflect.DeepEqual(actual, expect) {
+				t.Fatal("result of s3 circuit breaker shell command is unexpect!")
+			}
+		}
+	}
+}
diff --git a/weed/shell/command_s3_clean_uploads.go b/weed/shell/command_s3_clean_uploads.go
index 1ba31292c..a6dc8f574 100644
--- a/weed/shell/command_s3_clean_uploads.go
+++ b/weed/shell/command_s3_clean_uploads.go
@@ -3,6 +3,7 @@ package shell
 import (
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"io"
 	"math"
@@ -39,6 +40,8 @@ func (c *commandS3CleanUploads) Do(args []string, commandEnv *CommandEnv, writer
 		return nil
 	}
 
+	signingKey := util.GetViper().GetString("jwt.signing.key")
+
 	var filerBucketsPath string
 	filerBucketsPath, err = readFilerBucketsPath(commandEnv)
 	if err != nil {
@@ -55,14 +58,16 @@ func (c *commandS3CleanUploads) Do(args []string, commandEnv *CommandEnv, writer
 	}
 
 	for _, bucket := range buckets {
-		c.cleanupUploads(commandEnv, writer, filerBucketsPath, bucket, *uploadedTimeAgo)
+		if err := c.cleanupUploads(commandEnv, writer, filerBucketsPath, bucket, *uploadedTimeAgo, signingKey); err != nil {
+			fmt.Fprintf(writer, fmt.Sprintf("failed cleanup uploads for backet %s: %v", bucket, err))
+		}
 	}
 
 	return err
 
 }
 
-func (c *commandS3CleanUploads) cleanupUploads(commandEnv *CommandEnv, writer io.Writer, filerBucketsPath string, bucket string, timeAgo time.Duration) error {
+func (c *commandS3CleanUploads) cleanupUploads(commandEnv *CommandEnv, writer io.Writer, filerBucketsPath string, bucket string, timeAgo time.Duration, signingKey string) error {
 	uploadsDir := filerBucketsPath + "/" + bucket + "/.uploads"
 	var staleUploads []string
 	now := time.Now()
@@ -77,12 +82,17 @@ func (c *commandS3CleanUploads) cleanupUploads(commandEnv *CommandEnv, writer io
 		return fmt.Errorf("list uploads under %v: %v", uploadsDir, err)
 	}
 
+	var encodedJwt security.EncodedJwt
+	if signingKey != "" {
+		encodedJwt = security.GenJwtForFilerServer(security.SigningKey(signingKey), 15*60)
+	}
+
 	for _, staleUpload := range staleUploads {
-		deleteUrl := fmt.Sprintf("http://%s:%d%s/%s?recursive=true&ignoreRecursiveError=true", commandEnv.option.FilerHost, commandEnv.option.FilerPort, uploadsDir, staleUpload)
+		deleteUrl := fmt.Sprintf("http://%s%s/%s?recursive=true&ignoreRecursiveError=true", commandEnv.option.FilerAddress.ToHttpAddress(), uploadsDir, staleUpload)
 		fmt.Fprintf(writer, "purge %s\n", deleteUrl)
 
-		err = util.Delete(deleteUrl, "")
-		if err != nil {
+		err = util.Delete(deleteUrl, string(encodedJwt))
+		if err != nil && err.Error() != "" {
 			return fmt.Errorf("purge %s/%s: %v", uploadsDir, staleUpload, err)
 		}
 	}
diff --git a/weed/shell/command_s3_configure.go b/weed/shell/command_s3_configure.go
index 5eab2ebd0..ddcafd847 100644
--- a/weed/shell/command_s3_configure.go
+++ b/weed/shell/command_s3_configure.go
@@ -42,13 +42,12 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 	secretKey := s3ConfigureCommand.String("secret_key", "", "specify the secret key")
 	isDelete := s3ConfigureCommand.Bool("delete", false, "delete users, actions or access keys")
 	apply := s3ConfigureCommand.Bool("apply", false, "update and apply s3 configuration")
-
 	if err = s3ConfigureCommand.Parse(args); err != nil {
 		return nil
 	}
 
 	var buf bytes.Buffer
-	if err = commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	if err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 		return filer.ReadEntry(commandEnv.MasterClient, client, filer.IamConfigDirecotry, filer.IamIdentityFile, &buf)
 	}); err != nil && err != filer_pb.ErrNotFound {
 		return err
@@ -83,6 +82,7 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 		}
 	}
 	if changed {
+		infoAboutSimulationMode(writer, *apply, "-apply")
 		if *isDelete {
 			var exists []int
 			for _, cmdAction := range cmdActions {
@@ -151,6 +151,7 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 			}
 		}
 	} else if *user != "" && *actions != "" {
+		infoAboutSimulationMode(writer, *apply, "-apply")
 		identity := iam_pb.Identity{
 			Name:        *user,
 			Actions:     cmdActions,
@@ -171,7 +172,7 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 
 	if *apply {
 
-		if err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+		if err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 			return filer.SaveInsideFiler(client, filer.IamConfigDirecotry, filer.IamIdentityFile, buf.Bytes())
 		}); err != nil {
 			return err
diff --git a/weed/shell/command_volume_balance.go b/weed/shell/command_volume_balance.go
index df3067722..462143e25 100644
--- a/weed/shell/command_volume_balance.go
+++ b/weed/shell/command_volume_balance.go
@@ -3,11 +3,12 @@ package shell
 import (
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/super_block"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"golang.org/x/exp/slices"
 	"io"
 	"os"
-	"sort"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
@@ -62,10 +63,6 @@ func (c *commandVolumeBalance) Help() string {
 
 func (c *commandVolumeBalance) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	balanceCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	collection := balanceCommand.String("collection", "EACH_COLLECTION", "collection name, or use \"ALL_COLLECTIONS\" across collections, \"EACH_COLLECTION\" for each collection")
 	dc := balanceCommand.String("dataCenter", "", "only apply the balancing for this dataCenter")
@@ -73,9 +70,14 @@ func (c *commandVolumeBalance) Do(args []string, commandEnv *CommandEnv, writer
 	if err = balanceCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	// collect topology information
-	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv)
+	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv, 15*time.Second)
 	if err != nil {
 		return err
 	}
@@ -223,14 +225,14 @@ func (n *Node) selectVolumes(fn func(v *master_pb.VolumeInformationMessage) bool
 }
 
 func sortWritableVolumes(volumes []*master_pb.VolumeInformationMessage) {
-	sort.Slice(volumes, func(i, j int) bool {
-		return volumes[i].Size < volumes[j].Size
+	slices.SortFunc(volumes, func(a, b *master_pb.VolumeInformationMessage) bool {
+		return a.Size < b.Size
 	})
 }
 
 func sortReadOnlyVolumes(volumes []*master_pb.VolumeInformationMessage) {
-	sort.Slice(volumes, func(i, j int) bool {
-		return volumes[i].Id < volumes[j].Id
+	slices.SortFunc(volumes, func(a, b *master_pb.VolumeInformationMessage) bool {
+		return a.Id < b.Id
 	})
 }
 
@@ -254,10 +256,9 @@ func balanceSelectedVolume(commandEnv *CommandEnv, diskType types.DiskType, volu
 
 	for hasMoved {
 		hasMoved = false
-		sort.Slice(nodesWithCapacity, func(i, j int) bool {
-			return nodesWithCapacity[i].localVolumeRatio(capacityFunc) < nodesWithCapacity[j].localVolumeRatio(capacityFunc)
+		slices.SortFunc(nodesWithCapacity, func(a, b *Node) bool {
+			return a.localVolumeRatio(capacityFunc) < b.localVolumeRatio(capacityFunc)
 		})
-
 		fullNode := nodesWithCapacity[len(nodesWithCapacity)-1]
 		var candidateVolumes []*master_pb.VolumeInformationMessage
 		for _, v := range fullNode.selectedVolumes {
@@ -325,7 +326,7 @@ func moveVolume(commandEnv *CommandEnv, v *master_pb.VolumeInformationMessage, f
 	}
 	fmt.Fprintf(os.Stdout, "  moving %s volume %s%d %s => %s\n", v.DiskType, collectionPrefix, v.Id, fullNode.info.Id, emptyNode.info.Id)
 	if applyChange {
-		return LiveMoveVolume(commandEnv.option.GrpcDialOption, os.Stderr, needle.VolumeId(v.Id), fullNode.info.Id, emptyNode.info.Id, 5*time.Second, v.DiskType, false)
+		return LiveMoveVolume(commandEnv.option.GrpcDialOption, os.Stderr, needle.VolumeId(v.Id), pb.NewServerAddressFromDataNode(fullNode.info), pb.NewServerAddressFromDataNode(emptyNode.info), 5*time.Second, v.DiskType, false)
 	}
 	return nil
 }
diff --git a/weed/shell/command_volume_check_disk.go b/weed/shell/command_volume_check_disk.go
index 7e060f3d3..6a22a0273 100644
--- a/weed/shell/command_volume_check_disk.go
+++ b/weed/shell/command_volume_check_disk.go
@@ -6,11 +6,12 @@ import (
 	"flag"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
+	"golang.org/x/exp/slices"
 	"io"
 	"math"
-	"sort"
 )
 
 func init() {
@@ -26,7 +27,7 @@ func (c *commandVolumeCheckDisk) Name() string {
 }
 
 func (c *commandVolumeCheckDisk) Help() string {
-	return `check all replicated volumes to find and fix inconsistencies
+	return `check all replicated volumes to find and fix inconsistencies. It is optional and resource intensive.
 
 	How it works:
 	
@@ -41,23 +42,25 @@ func (c *commandVolumeCheckDisk) Help() string {
 
 func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	fsckCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	slowMode := fsckCommand.Bool("slow", false, "slow mode checks all replicas even file counts are the same")
 	verbose := fsckCommand.Bool("v", false, "verbose mode")
+	volumeId := fsckCommand.Uint("volumeId", 0, "the volume id")
 	applyChanges := fsckCommand.Bool("force", false, "apply the fix")
 	nonRepairThreshold := fsckCommand.Float64("nonRepairThreshold", 0.3, "repair when missing keys is not more than this limit")
 	if err = fsckCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChanges, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	c.env = commandEnv
 
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
@@ -67,13 +70,13 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 	fileCount := func(replica *VolumeReplica) uint64 {
 		return replica.info.FileCount - replica.info.DeleteCount
 	}
-	aDB, bDB := needle_map.NewMemDb(), needle_map.NewMemDb()
-	defer aDB.Close()
-	defer bDB.Close()
 
 	for _, replicas := range volumeReplicas {
-		sort.Slice(replicas, func(i, j int) bool {
-			return fileCount(replicas[i]) > fileCount(replicas[j])
+		if *volumeId > 0 && replicas[0].info.Id != uint32(*volumeId) {
+			continue
+		}
+		slices.SortFunc(replicas, func(a, b *VolumeReplica) bool {
+			return fileCount(a) > fileCount(b)
 		})
 		for len(replicas) >= 2 {
 			a, b := replicas[0], replicas[1]
@@ -89,7 +92,7 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 				continue
 			}
 
-			if err := c.syncTwoReplicas(aDB, bDB, a, verbose, writer, b, err, applyChanges, nonRepairThreshold); err != nil {
+			if err := c.syncTwoReplicas(a, b, *applyChanges, *nonRepairThreshold, *verbose, writer); err != nil {
 				fmt.Fprintf(writer, "sync volume %d on %s and %s: %v\n", a.info.Id, a.location.dataNode.Id, b.location.dataNode.Id, err)
 			}
 			replicas = replicas[1:]
@@ -99,42 +102,50 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 	return nil
 }
 
-func (c *commandVolumeCheckDisk) syncTwoReplicas(aDB *needle_map.MemDb, bDB *needle_map.MemDb, a *VolumeReplica, verbose *bool, writer io.Writer, b *VolumeReplica, err error, applyChanges *bool, nonRepairThreshold *float64) error {
+func (c *commandVolumeCheckDisk) syncTwoReplicas(a *VolumeReplica, b *VolumeReplica, applyChanges bool, nonRepairThreshold float64, verbose bool, writer io.Writer) (err error) {
 	aHasChanges, bHasChanges := true, true
 	for aHasChanges || bHasChanges {
-		// reset index db
+		if aHasChanges, bHasChanges, err = c.checkBoth(a, b, applyChanges, nonRepairThreshold, verbose, writer); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *commandVolumeCheckDisk) checkBoth(a *VolumeReplica, b *VolumeReplica, applyChanges bool, nonRepairThreshold float64, verbose bool, writer io.Writer) (aHasChanges bool, bHasChanges bool, err error) {
+	aDB, bDB := needle_map.NewMemDb(), needle_map.NewMemDb()
+	defer func() {
 		aDB.Close()
 		bDB.Close()
-		aDB, bDB = needle_map.NewMemDb(), needle_map.NewMemDb()
+	}()
 
-		// read index db
-		if err := c.readIndexDatabase(aDB, a.info.Collection, a.info.Id, a.location.dataNode.Id, *verbose, writer); err != nil {
-			return err
-		}
-		if err := c.readIndexDatabase(bDB, b.info.Collection, b.info.Id, b.location.dataNode.Id, *verbose, writer); err != nil {
-			return err
-		}
+	// read index db
+	if err = c.readIndexDatabase(aDB, a.info.Collection, a.info.Id, pb.NewServerAddressFromDataNode(a.location.dataNode), verbose, writer); err != nil {
+		return true, true, fmt.Errorf("readIndexDatabase %s volume %d: %v", a.location.dataNode, a.info.Id, err)
+	}
+	if err := c.readIndexDatabase(bDB, b.info.Collection, b.info.Id, pb.NewServerAddressFromDataNode(b.location.dataNode), verbose, writer); err != nil {
+		return true, true, fmt.Errorf("readIndexDatabase %s volume %d: %v", b.location.dataNode, b.info.Id, err)
+	}
 
-		// find and make up the differences
-		if aHasChanges, err = c.doVolumeCheckDisk(aDB, bDB, a, b, *verbose, writer, *applyChanges, *nonRepairThreshold); err != nil {
-			return err
-		}
-		if bHasChanges, err = c.doVolumeCheckDisk(bDB, aDB, b, a, *verbose, writer, *applyChanges, *nonRepairThreshold); err != nil {
-			return err
-		}
+	// find and make up the differences
+	if aHasChanges, err = c.doVolumeCheckDisk(bDB, aDB, b, a, verbose, writer, applyChanges, nonRepairThreshold); err != nil {
+		return true, true, fmt.Errorf("doVolumeCheckDisk source:%s target:%s volume %d: %v", b.location.dataNode, a.location.dataNode, b.info.Id, err)
 	}
-	return nil
+	if bHasChanges, err = c.doVolumeCheckDisk(aDB, bDB, a, b, verbose, writer, applyChanges, nonRepairThreshold); err != nil {
+		return true, true, fmt.Errorf("doVolumeCheckDisk source:%s target:%s volume %d: %v", a.location.dataNode, b.location.dataNode, a.info.Id, err)
+	}
+	return
 }
 
-func (c *commandVolumeCheckDisk) doVolumeCheckDisk(subtrahend, minuend *needle_map.MemDb, source, target *VolumeReplica, verbose bool, writer io.Writer, applyChanges bool, nonRepairThreshold float64) (hasChanges bool, err error) {
+func (c *commandVolumeCheckDisk) doVolumeCheckDisk(minuend, subtrahend *needle_map.MemDb, source, target *VolumeReplica, verbose bool, writer io.Writer, applyChanges bool, nonRepairThreshold float64) (hasChanges bool, err error) {
 
 	// find missing keys
 	// hash join, can be more efficient
 	var missingNeedles []needle_map.NeedleValue
 	var counter int
-	subtrahend.AscendingVisit(func(value needle_map.NeedleValue) error {
+	minuend.AscendingVisit(func(value needle_map.NeedleValue) error {
 		counter++
-		if _, found := minuend.Get(value.Key); !found {
+		if _, found := subtrahend.Get(value.Key); !found {
 			missingNeedles = append(missingNeedles, value)
 		}
 		return nil
@@ -155,7 +166,7 @@ func (c *commandVolumeCheckDisk) doVolumeCheckDisk(subtrahend, minuend *needle_m
 
 	for _, needleValue := range missingNeedles {
 
-		needleBlob, err := c.readSourceNeedleBlob(source.location.dataNode.Id, source.info.Id, needleValue)
+		needleBlob, err := c.readSourceNeedleBlob(pb.NewServerAddressFromDataNode(source.location.dataNode), source.info.Id, needleValue)
 		if err != nil {
 			return hasChanges, err
 		}
@@ -170,7 +181,7 @@ func (c *commandVolumeCheckDisk) doVolumeCheckDisk(subtrahend, minuend *needle_m
 
 		hasChanges = true
 
-		if err = c.writeNeedleBlobToTarget(target.location.dataNode.Id, source.info.Id, needleValue, needleBlob); err != nil {
+		if err = c.writeNeedleBlobToTarget(pb.NewServerAddressFromDataNode(target.location.dataNode), source.info.Id, needleValue, needleBlob); err != nil {
 			return hasChanges, err
 		}
 
@@ -179,9 +190,9 @@ func (c *commandVolumeCheckDisk) doVolumeCheckDisk(subtrahend, minuend *needle_m
 	return
 }
 
-func (c *commandVolumeCheckDisk) readSourceNeedleBlob(sourceVolumeServer string, volumeId uint32, needleValue needle_map.NeedleValue) (needleBlob []byte, err error) {
+func (c *commandVolumeCheckDisk) readSourceNeedleBlob(sourceVolumeServer pb.ServerAddress, volumeId uint32, needleValue needle_map.NeedleValue) (needleBlob []byte, err error) {
 
-	err = operation.WithVolumeServerClient(sourceVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
+	err = operation.WithVolumeServerClient(false, sourceVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
 		resp, err := client.ReadNeedleBlob(context.Background(), &volume_server_pb.ReadNeedleBlobRequest{
 			VolumeId: volumeId,
 			NeedleId: uint64(needleValue.Key),
@@ -197,9 +208,9 @@ func (c *commandVolumeCheckDisk) readSourceNeedleBlob(sourceVolumeServer string,
 	return
 }
 
-func (c *commandVolumeCheckDisk) writeNeedleBlobToTarget(targetVolumeServer string, volumeId uint32, needleValue needle_map.NeedleValue, needleBlob []byte) error {
+func (c *commandVolumeCheckDisk) writeNeedleBlobToTarget(targetVolumeServer pb.ServerAddress, volumeId uint32, needleValue needle_map.NeedleValue, needleBlob []byte) error {
 
-	return operation.WithVolumeServerClient(targetVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(false, targetVolumeServer, c.env.option.GrpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
 		_, err := client.WriteNeedleBlob(context.Background(), &volume_server_pb.WriteNeedleBlobRequest{
 			VolumeId:   volumeId,
 			NeedleId:   uint64(needleValue.Key),
@@ -211,7 +222,7 @@ func (c *commandVolumeCheckDisk) writeNeedleBlobToTarget(targetVolumeServer stri
 
 }
 
-func (c *commandVolumeCheckDisk) readIndexDatabase(db *needle_map.MemDb, collection string, volumeId uint32, volumeServer string, verbose bool, writer io.Writer) error {
+func (c *commandVolumeCheckDisk) readIndexDatabase(db *needle_map.MemDb, collection string, volumeId uint32, volumeServer pb.ServerAddress, verbose bool, writer io.Writer) error {
 
 	var buf bytes.Buffer
 	if err := c.copyVolumeIndexFile(collection, volumeId, volumeServer, &buf, verbose, writer); err != nil {
@@ -226,9 +237,9 @@ func (c *commandVolumeCheckDisk) readIndexDatabase(db *needle_map.MemDb, collect
 
 }
 
-func (c *commandVolumeCheckDisk) copyVolumeIndexFile(collection string, volumeId uint32, volumeServer string, buf *bytes.Buffer, verbose bool, writer io.Writer) error {
+func (c *commandVolumeCheckDisk) copyVolumeIndexFile(collection string, volumeId uint32, volumeServer pb.ServerAddress, buf *bytes.Buffer, verbose bool, writer io.Writer) error {
 
-	return operation.WithVolumeServerClient(volumeServer, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(true, volumeServer, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 
 		ext := ".idx"
 
diff --git a/weed/shell/command_volume_configure_replication.go b/weed/shell/command_volume_configure_replication.go
index e3f034873..610986489 100644
--- a/weed/shell/command_volume_configure_replication.go
+++ b/weed/shell/command_volume_configure_replication.go
@@ -5,7 +5,9 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
+	"path/filepath"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
@@ -33,19 +35,20 @@ func (c *commandVolumeConfigureReplication) Help() string {
 `
 }
 
-func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
-
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
+func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *CommandEnv, _ io.Writer) (err error) {
 
 	configureReplicationCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := configureReplicationCommand.Int("volumeId", 0, "the volume id")
 	replicationString := configureReplicationCommand.String("replication", "", "the intended replication value")
+	collectionPattern := configureReplicationCommand.String("collectionPattern", "", "match with wildcard characters '*' and '?'")
 	if err = configureReplicationCommand.Parse(args); err != nil {
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	if *replicationString == "" {
 		return fmt.Errorf("empty replication value")
 	}
@@ -54,15 +57,15 @@ func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *Comman
 	if err != nil {
 		return fmt.Errorf("replication format: %v", err)
 	}
-	replicaPlacementInt32 := uint32(replicaPlacement.Byte())
 
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
 
 	vid := needle.VolumeId(*volumeIdInt)
+	volumeFilter := getVolumeFilter(replicaPlacement, uint32(vid), *collectionPattern)
 
 	// find all data nodes with volumes that needs replication change
 	var allLocations []location
@@ -70,7 +73,7 @@ func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *Comman
 		loc := newLocation(dc, string(rack), dn)
 		for _, diskInfo := range dn.DiskInfos {
 			for _, v := range diskInfo.VolumeInfos {
-				if v.Id == uint32(vid) && v.ReplicaPlacement != replicaPlacementInt32 {
+				if volumeFilter(v) {
 					allLocations = append(allLocations, loc)
 					continue
 				}
@@ -83,7 +86,7 @@ func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *Comman
 	}
 
 	for _, dst := range allLocations {
-		err := operation.WithVolumeServerClient(dst.dataNode.Id, commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+		err := operation.WithVolumeServerClient(false, pb.NewServerAddressFromDataNode(dst.dataNode), commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 			resp, configureErr := volumeServerClient.VolumeConfigure(context.Background(), &volume_server_pb.VolumeConfigureRequest{
 				VolumeId:    uint32(vid),
 				Replication: replicaPlacement.String(),
@@ -105,3 +108,19 @@ func (c *commandVolumeConfigureReplication) Do(args []string, commandEnv *Comman
 
 	return nil
 }
+
+func getVolumeFilter(replicaPlacement *super_block.ReplicaPlacement, volumeId uint32, collectionPattern string) func(message *master_pb.VolumeInformationMessage) bool {
+	replicaPlacementInt32 := uint32(replicaPlacement.Byte())
+	if volumeId > 0 {
+		return func(v *master_pb.VolumeInformationMessage) bool {
+			return v.Id == volumeId && v.ReplicaPlacement != replicaPlacementInt32
+		}
+	}
+	return func(v *master_pb.VolumeInformationMessage) bool {
+		matched, err := filepath.Match(collectionPattern, v.Collection)
+		if err != nil {
+			return false
+		}
+		return matched
+	}
+}
diff --git a/weed/shell/command_volume_copy.go b/weed/shell/command_volume_copy.go
index 85b4bb095..0a4ac5063 100644
--- a/weed/shell/command_volume_copy.go
+++ b/weed/shell/command_volume_copy.go
@@ -3,6 +3,7 @@ package shell
 import (
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
@@ -32,10 +33,6 @@ func (c *commandVolumeCopy) Help() string {
 
 func (c *commandVolumeCopy) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volCopyCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := volCopyCommand.Int("volumeId", 0, "the volume id")
 	sourceNodeStr := volCopyCommand.String("source", "", "the source volume server <host>:<port>")
@@ -44,7 +41,11 @@ func (c *commandVolumeCopy) Do(args []string, commandEnv *CommandEnv, writer io.
 		return nil
 	}
 
-	sourceVolumeServer, targetVolumeServer := *sourceNodeStr, *targetNodeStr
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	sourceVolumeServer, targetVolumeServer := pb.ServerAddress(*sourceNodeStr), pb.ServerAddress(*targetNodeStr)
 
 	volumeId := needle.VolumeId(*volumeIdInt)
 
@@ -52,6 +53,6 @@ func (c *commandVolumeCopy) Do(args []string, commandEnv *CommandEnv, writer io.
 		return fmt.Errorf("source and target volume servers are the same!")
 	}
 
-	_, err = copyVolume(commandEnv.option.GrpcDialOption, volumeId, sourceVolumeServer, targetVolumeServer, "")
+	_, err = copyVolume(commandEnv.option.GrpcDialOption, writer, volumeId, sourceVolumeServer, targetVolumeServer, "")
 	return
 }
diff --git a/weed/shell/command_volume_delete.go b/weed/shell/command_volume_delete.go
index 187caa1a4..30d71ba9f 100644
--- a/weed/shell/command_volume_delete.go
+++ b/weed/shell/command_volume_delete.go
@@ -2,6 +2,7 @@ package shell
 
 import (
 	"flag"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
@@ -30,10 +31,6 @@ func (c *commandVolumeDelete) Help() string {
 
 func (c *commandVolumeDelete) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volDeleteCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := volDeleteCommand.Int("volumeId", 0, "the volume id")
 	nodeStr := volDeleteCommand.String("node", "", "the volume server <host>:<port>")
@@ -41,7 +38,11 @@ func (c *commandVolumeDelete) Do(args []string, commandEnv *CommandEnv, writer i
 		return nil
 	}
 
-	sourceVolumeServer := *nodeStr
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	sourceVolumeServer := pb.ServerAddress(*nodeStr)
 
 	volumeId := needle.VolumeId(*volumeIdInt)
 
diff --git a/weed/shell/command_volume_delete_empty.go b/weed/shell/command_volume_delete_empty.go
index 079915f66..79e61d38d 100644
--- a/weed/shell/command_volume_delete_empty.go
+++ b/weed/shell/command_volume_delete_empty.go
@@ -2,6 +2,7 @@ package shell
 
 import (
 	"flag"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"io"
@@ -32,19 +33,20 @@ func (c *commandVolumeDeleteEmpty) Help() string {
 
 func (c *commandVolumeDeleteEmpty) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volDeleteCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	quietPeriod := volDeleteCommand.Duration("quietFor", 24*time.Hour, "select empty volumes with no recent writes, avoid newly created ones")
 	applyBalancing := volDeleteCommand.Bool("force", false, "apply to delete empty volumes")
 	if err = volDeleteCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
@@ -58,7 +60,7 @@ func (c *commandVolumeDeleteEmpty) Do(args []string, commandEnv *CommandEnv, wri
 				if v.Size <= 8 && v.ModifiedAtSecond+quietSeconds < nowUnixSeconds {
 					if *applyBalancing {
 						log.Printf("deleting empty volume %d from %s", v.Id, dn.Id)
-						if deleteErr := deleteVolume(commandEnv.option.GrpcDialOption, needle.VolumeId(v.Id), dn.Id); deleteErr != nil {
+						if deleteErr := deleteVolume(commandEnv.option.GrpcDialOption, needle.VolumeId(v.Id), pb.NewServerAddressFromDataNode(dn)); deleteErr != nil {
 							err = deleteErr
 						}
 						continue
diff --git a/weed/shell/command_volume_fix_replication.go b/weed/shell/command_volume_fix_replication.go
index efd5ae5de..4d986d252 100644
--- a/weed/shell/command_volume_fix_replication.go
+++ b/weed/shell/command_volume_fix_replication.go
@@ -4,11 +4,14 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"golang.org/x/exp/slices"
 	"io"
 	"path/filepath"
-	"sort"
+	"strconv"
+	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
@@ -51,58 +54,112 @@ func (c *commandVolumeFixReplication) Help() string {
 
 func (c *commandVolumeFixReplication) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volFixReplicationCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	c.collectionPattern = volFixReplicationCommand.String("collectionPattern", "", "match with wildcard characters '*' and '?'")
 	skipChange := volFixReplicationCommand.Bool("n", false, "skip the changes")
 	retryCount := volFixReplicationCommand.Int("retry", 0, "how many times to retry")
+	volumesPerStep := volFixReplicationCommand.Int("volumesPerStep", 0, "how many volumes to fix in one cycle")
+
 	if err = volFixReplicationCommand.Parse(args); err != nil {
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	takeAction := !*skipChange
 
-	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
-	if err != nil {
-		return err
-	}
+	underReplicatedVolumeIdsCount := 1
+	for underReplicatedVolumeIdsCount > 0 {
+		fixedVolumeReplicas := map[string]int{}
 
-	// find all volumes that needs replication
-	// collect all data nodes
-	volumeReplicas, allLocations := collectVolumeReplicaLocations(topologyInfo)
+		// collect topology information
+		topologyInfo, _, err := collectTopologyInfo(commandEnv, 15*time.Second)
+		if err != nil {
+			return err
+		}
 
-	if len(allLocations) == 0 {
-		return fmt.Errorf("no data nodes at all")
-	}
+		// find all volumes that needs replication
+		// collect all data nodes
+		volumeReplicas, allLocations := collectVolumeReplicaLocations(topologyInfo)
 
-	// find all under replicated volumes
-	var underReplicatedVolumeIds, overReplicatedVolumeIds []uint32
-	for vid, replicas := range volumeReplicas {
-		replica := replicas[0]
-		replicaPlacement, _ := super_block.NewReplicaPlacementFromByte(byte(replica.info.ReplicaPlacement))
-		if replicaPlacement.GetCopyCount() > len(replicas) {
-			underReplicatedVolumeIds = append(underReplicatedVolumeIds, vid)
-		} else if replicaPlacement.GetCopyCount() < len(replicas) {
-			overReplicatedVolumeIds = append(overReplicatedVolumeIds, vid)
-			fmt.Fprintf(writer, "volume %d replication %s, but over replicated %+d\n", replica.info.Id, replicaPlacement, len(replicas))
+		if len(allLocations) == 0 {
+			return fmt.Errorf("no data nodes at all")
 		}
-	}
 
-	if len(overReplicatedVolumeIds) > 0 {
-		return c.fixOverReplicatedVolumes(commandEnv, writer, takeAction, overReplicatedVolumeIds, volumeReplicas, allLocations)
-	}
+		// find all under replicated volumes
+		var underReplicatedVolumeIds, overReplicatedVolumeIds, misplacedVolumeIds []uint32
+		for vid, replicas := range volumeReplicas {
+			replica := replicas[0]
+			replicaPlacement, _ := super_block.NewReplicaPlacementFromByte(byte(replica.info.ReplicaPlacement))
+			if replicaPlacement.GetCopyCount() > len(replicas) {
+				underReplicatedVolumeIds = append(underReplicatedVolumeIds, vid)
+			} else if replicaPlacement.GetCopyCount() < len(replicas) {
+				overReplicatedVolumeIds = append(overReplicatedVolumeIds, vid)
+				fmt.Fprintf(writer, "volume %d replication %s, but over replicated %+d\n", replica.info.Id, replicaPlacement, len(replicas))
+			} else if isMisplaced(replicas, replicaPlacement) {
+				misplacedVolumeIds = append(misplacedVolumeIds, vid)
+				fmt.Fprintf(writer, "volume %d replication %s is not well placed %+v\n", replica.info.Id, replicaPlacement, replicas)
+			}
+		}
 
-	if len(underReplicatedVolumeIds) == 0 {
-		return nil
-	}
+		if len(overReplicatedVolumeIds) > 0 {
+			if err := c.deleteOneVolume(commandEnv, writer, takeAction, overReplicatedVolumeIds, volumeReplicas, allLocations, pickOneReplicaToDelete); err != nil {
+				return err
+			}
+		}
 
-	// find the most under populated data nodes
-	return c.fixUnderReplicatedVolumes(commandEnv, writer, takeAction, underReplicatedVolumeIds, volumeReplicas, allLocations, *retryCount)
+		if len(misplacedVolumeIds) > 0 {
+			if err := c.deleteOneVolume(commandEnv, writer, takeAction, misplacedVolumeIds, volumeReplicas, allLocations, pickOneMisplacedVolume); err != nil {
+				return err
+			}
+		}
+
+		underReplicatedVolumeIdsCount = len(underReplicatedVolumeIds)
+		if underReplicatedVolumeIdsCount > 0 {
+			// find the most under populated data nodes
+			fixedVolumeReplicas, err = c.fixUnderReplicatedVolumes(commandEnv, writer, takeAction, underReplicatedVolumeIds, volumeReplicas, allLocations, *retryCount, *volumesPerStep)
+			if err != nil {
+				return err
+			}
+		}
+
+		if *skipChange {
+			break
+		}
 
+		// check that the topology has been updated
+		if len(fixedVolumeReplicas) > 0 {
+			fixedVolumes := make([]string, 0, len(fixedVolumeReplicas))
+			for k, _ := range fixedVolumeReplicas {
+				fixedVolumes = append(fixedVolumes, k)
+			}
+			volumeIdLocations, err := lookupVolumeIds(commandEnv, fixedVolumes)
+			if err != nil {
+				return err
+			}
+			for _, volumeIdLocation := range volumeIdLocations {
+				volumeId := volumeIdLocation.VolumeOrFileId
+				volumeIdLocationCount := len(volumeIdLocation.Locations)
+				i := 0
+				for fixedVolumeReplicas[volumeId] >= volumeIdLocationCount {
+					fmt.Fprintf(writer, "the number of locations for volume %s has not increased yet, let's wait\n", volumeId)
+					time.Sleep(time.Duration(i+1) * time.Second * 7)
+					volumeLocIds, err := lookupVolumeIds(commandEnv, []string{volumeId})
+					if err != nil {
+						return err
+					}
+					volumeIdLocationCount = len(volumeLocIds[0].Locations)
+					if *retryCount <= i {
+						return fmt.Errorf("replicas volume %s mismatch in topology", volumeId)
+					}
+					i += 1
+				}
+			}
+		}
+	}
+	return nil
 }
 
 func collectVolumeReplicaLocations(topologyInfo *master_pb.TopologyInfo) (map[uint32][]*VolumeReplica, []location) {
@@ -123,12 +180,14 @@ func collectVolumeReplicaLocations(topologyInfo *master_pb.TopologyInfo) (map[ui
 	return volumeReplicas, allLocations
 }
 
-func (c *commandVolumeFixReplication) fixOverReplicatedVolumes(commandEnv *CommandEnv, writer io.Writer, takeAction bool, overReplicatedVolumeIds []uint32, volumeReplicas map[uint32][]*VolumeReplica, allLocations []location) error {
+type SelectOneVolumeFunc func(replicas []*VolumeReplica, replicaPlacement *super_block.ReplicaPlacement) *VolumeReplica
+
+func (c *commandVolumeFixReplication) deleteOneVolume(commandEnv *CommandEnv, writer io.Writer, takeAction bool, overReplicatedVolumeIds []uint32, volumeReplicas map[uint32][]*VolumeReplica, allLocations []location, selectOneVolumeFn SelectOneVolumeFunc) error {
 	for _, vid := range overReplicatedVolumeIds {
 		replicas := volumeReplicas[vid]
 		replicaPlacement, _ := super_block.NewReplicaPlacementFromByte(byte(replicas[0].info.ReplicaPlacement))
 
-		replica := pickOneReplicaToDelete(replicas, replicaPlacement)
+		replica := selectOneVolumeFn(replicas, replicaPlacement)
 
 		// check collection name pattern
 		if *c.collectionPattern != "" {
@@ -141,13 +200,24 @@ func (c *commandVolumeFixReplication) fixOverReplicatedVolumes(commandEnv *Comma
 			}
 		}
 
+		collectionIsMismatch := false
+		for _, volumeReplica := range replicas {
+			if volumeReplica.info.Collection != replica.info.Collection {
+				fmt.Fprintf(writer, "skip delete volume %d as collection %s is mismatch: %s\n", replica.info.Id, replica.info.Collection, volumeReplica.info.Collection)
+				collectionIsMismatch = true
+			}
+		}
+		if collectionIsMismatch {
+			continue
+		}
+
 		fmt.Fprintf(writer, "deleting volume %d from %s ...\n", replica.info.Id, replica.location.dataNode.Id)
 
 		if !takeAction {
 			break
 		}
 
-		if err := deleteVolume(commandEnv.option.GrpcDialOption, needle.VolumeId(replica.info.Id), replica.location.dataNode.Id); err != nil {
+		if err := deleteVolume(commandEnv.option.GrpcDialOption, needle.VolumeId(replica.info.Id), pb.NewServerAddressFromDataNode(replica.location.dataNode)); err != nil {
 			return fmt.Errorf("deleting volume %d from %s : %v", replica.info.Id, replica.location.dataNode.Id, err)
 		}
 
@@ -155,16 +225,22 @@ func (c *commandVolumeFixReplication) fixOverReplicatedVolumes(commandEnv *Comma
 	return nil
 }
 
-func (c *commandVolumeFixReplication) fixUnderReplicatedVolumes(commandEnv *CommandEnv, writer io.Writer, takeAction bool, underReplicatedVolumeIds []uint32, volumeReplicas map[uint32][]*VolumeReplica, allLocations []location, retryCount int) (err error) {
-
+func (c *commandVolumeFixReplication) fixUnderReplicatedVolumes(commandEnv *CommandEnv, writer io.Writer, takeAction bool, underReplicatedVolumeIds []uint32, volumeReplicas map[uint32][]*VolumeReplica, allLocations []location, retryCount int, volumesPerStep int) (fixedVolumes map[string]int, err error) {
+	fixedVolumes = map[string]int{}
+	if len(underReplicatedVolumeIds) > volumesPerStep && volumesPerStep > 0 {
+		underReplicatedVolumeIds = underReplicatedVolumeIds[0:volumesPerStep]
+	}
 	for _, vid := range underReplicatedVolumeIds {
 		for i := 0; i < retryCount+1; i++ {
 			if err = c.fixOneUnderReplicatedVolume(commandEnv, writer, takeAction, volumeReplicas, vid, allLocations); err == nil {
+				if takeAction {
+					fixedVolumes[strconv.FormatUint(uint64(vid), 10)] = len(volumeReplicas[vid])
+				}
 				break
 			}
 		}
 	}
-	return
+	return fixedVolumes, nil
 }
 
 func (c *commandVolumeFixReplication) fixOneUnderReplicatedVolume(commandEnv *CommandEnv, writer io.Writer, takeAction bool, volumeReplicas map[uint32][]*VolumeReplica, vid uint32, allLocations []location) error {
@@ -200,14 +276,28 @@ func (c *commandVolumeFixReplication) fixOneUnderReplicatedVolume(commandEnv *Co
 				break
 			}
 
-			err := operation.WithVolumeServerClient(dst.dataNode.Id, commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
-				_, replicateErr := volumeServerClient.VolumeCopy(context.Background(), &volume_server_pb.VolumeCopyRequest{
+			err := operation.WithVolumeServerClient(false, pb.NewServerAddressFromDataNode(dst.dataNode), commandEnv.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+				stream, replicateErr := volumeServerClient.VolumeCopy(context.Background(), &volume_server_pb.VolumeCopyRequest{
 					VolumeId:       replica.info.Id,
-					SourceDataNode: replica.location.dataNode.Id,
+					SourceDataNode: string(pb.NewServerAddressFromDataNode(replica.location.dataNode)),
 				})
 				if replicateErr != nil {
 					return fmt.Errorf("copying from %s => %s : %v", replica.location.dataNode.Id, dst.dataNode.Id, replicateErr)
 				}
+				for {
+					resp, recvErr := stream.Recv()
+					if recvErr != nil {
+						if recvErr == io.EOF {
+							break
+						} else {
+							return recvErr
+						}
+					}
+					if resp.ProcessedBytes > 0 {
+						fmt.Fprintf(writer, "volume %d processed %d bytes\n", replica.info.Id, resp.ProcessedBytes)
+					}
+				}
+
 				return nil
 			})
 
@@ -229,8 +319,8 @@ func (c *commandVolumeFixReplication) fixOneUnderReplicatedVolume(commandEnv *Co
 
 func keepDataNodesSorted(dataNodes []location, diskType types.DiskType) {
 	fn := capacityByFreeVolumeCount(diskType)
-	sort.Slice(dataNodes, func(i, j int) bool {
-		return fn(dataNodes[i].dataNode) > fn(dataNodes[j].dataNode)
+	slices.SortFunc(dataNodes, func(a, b location) bool {
+		return fn(a.dataNode) > fn(b.dataNode)
 	})
 }
 
@@ -409,9 +499,7 @@ func countReplicas(replicas []*VolumeReplica) (diffDc, diffRack, diffNode map[st
 }
 
 func pickOneReplicaToDelete(replicas []*VolumeReplica, replicaPlacement *super_block.ReplicaPlacement) *VolumeReplica {
-
-	sort.Slice(replicas, func(i, j int) bool {
-		a, b := replicas[i], replicas[j]
+	slices.SortFunc(replicas, func(a, b *VolumeReplica) bool {
 		if a.info.Size != b.info.Size {
 			return a.info.Size < b.info.Size
 		}
@@ -427,3 +515,44 @@ func pickOneReplicaToDelete(replicas []*VolumeReplica, replicaPlacement *super_b
 	return replicas[0]
 
 }
+
+// check and fix misplaced volumes
+
+func isMisplaced(replicas []*VolumeReplica, replicaPlacement *super_block.ReplicaPlacement) bool {
+
+	for i := 0; i < len(replicas); i++ {
+		others := otherThan(replicas, i)
+		if satisfyReplicaPlacement(replicaPlacement, others, *replicas[i].location) {
+			return false
+		}
+	}
+
+	return true
+
+}
+
+func otherThan(replicas []*VolumeReplica, index int) (others []*VolumeReplica) {
+	for i := 0; i < len(replicas); i++ {
+		if index != i {
+			others = append(others, replicas[i])
+		}
+	}
+	return
+}
+
+func pickOneMisplacedVolume(replicas []*VolumeReplica, replicaPlacement *super_block.ReplicaPlacement) (toDelete *VolumeReplica) {
+
+	var deletionCandidates []*VolumeReplica
+	for i := 0; i < len(replicas); i++ {
+		others := otherThan(replicas, i)
+		if !isMisplaced(others, replicaPlacement) {
+			deletionCandidates = append(deletionCandidates, replicas[i])
+		}
+	}
+	if len(deletionCandidates) > 0 {
+		return pickOneReplicaToDelete(deletionCandidates, replicaPlacement)
+	}
+
+	return pickOneReplicaToDelete(replicas, replicaPlacement)
+
+}
diff --git a/weed/shell/command_volume_fix_replication_test.go b/weed/shell/command_volume_fix_replication_test.go
index bb61be1ef..5212fd2ed 100644
--- a/weed/shell/command_volume_fix_replication_test.go
+++ b/weed/shell/command_volume_fix_replication_test.go
@@ -261,6 +261,29 @@ func TestSatisfyReplicaPlacement00x(t *testing.T) {
 
 }
 
+func TestSatisfyReplicaPlacement100(t *testing.T) {
+
+	var tests = []testcase{
+		{
+			name:        "test 100",
+			replication: "100",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+				},
+			},
+			possibleLocation: location{"dc2", "r3", &master_pb.DataNodeInfo{Id: "dn3"}},
+			expected:         true,
+		},
+	}
+
+	runTests(tests, t)
+
+}
+
 func runTests(tests []testcase, t *testing.T) {
 	for _, tt := range tests {
 		replicaPlacement, _ := super_block.NewReplicaPlacementFromString(tt.replication)
@@ -271,3 +294,141 @@ func runTests(tests []testcase, t *testing.T) {
 		}
 	}
 }
+
+func TestMisplacedChecking(t *testing.T) {
+
+	var tests = []testcase{
+		{
+			name:        "test 001",
+			replication: "001",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+				},
+			},
+			expected: true,
+		},
+		{
+			name:        "test 010",
+			replication: "010",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+				},
+			},
+			expected: false,
+		},
+		{
+			name:        "test 011",
+			replication: "011",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+				},
+			},
+			expected: false,
+		},
+		{
+			name:        "test 110",
+			replication: "110",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+				},
+			},
+			expected: false,
+		},
+		{
+			name:        "test 100",
+			replication: "100",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+				},
+			},
+			expected: true,
+		},
+	}
+
+	for _, tt := range tests {
+		replicaPlacement, _ := super_block.NewReplicaPlacementFromString(tt.replication)
+		println("replication:", tt.replication, "expected", tt.expected, "name:", tt.name)
+		if isMisplaced(tt.replicas, replicaPlacement) != tt.expected {
+			t.Errorf("%s: expect %v %v %+v",
+				tt.name, tt.expected, tt.replication, tt.replicas)
+		}
+	}
+
+}
+
+func TestPickingMisplacedVolumeToDelete(t *testing.T) {
+
+	var tests = []testcase{
+		{
+			name:        "test 001",
+			replication: "001",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+					info: &master_pb.VolumeInformationMessage{
+						Size: 100,
+					},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+					info: &master_pb.VolumeInformationMessage{
+						Size: 99,
+					},
+				},
+			},
+			possibleLocation: location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+		},
+		{
+			name:        "test 100",
+			replication: "100",
+			replicas: []*VolumeReplica{
+				{
+					location: &location{"dc1", "r1", &master_pb.DataNodeInfo{Id: "dn1"}},
+					info: &master_pb.VolumeInformationMessage{
+						Size: 100,
+					},
+				},
+				{
+					location: &location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+					info: &master_pb.VolumeInformationMessage{
+						Size: 99,
+					},
+				},
+			},
+			possibleLocation: location{"dc1", "r2", &master_pb.DataNodeInfo{Id: "dn2"}},
+		},
+	}
+
+	for _, tt := range tests {
+		replicaPlacement, _ := super_block.NewReplicaPlacementFromString(tt.replication)
+		println("replication:", tt.replication, "name:", tt.name)
+		if x := pickOneMisplacedVolume(tt.replicas, replicaPlacement); x.location.dataNode.Id != tt.possibleLocation.dataNode.Id {
+			t.Errorf("%s: picked %+v for replication %v",
+				tt.name, x.location.dataNode.Id, tt.replication)
+		} else {
+			t.Logf("%s: picked %+v %v",
+				tt.name, x.location.dataNode.Id, tt.replication)
+		}
+	}
+
+}
diff --git a/weed/shell/command_volume_fsck.go b/weed/shell/command_volume_fsck.go
index 9e778b918..2b1daf97c 100644
--- a/weed/shell/command_volume_fsck.go
+++ b/weed/shell/command_volume_fsck.go
@@ -5,22 +5,27 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/storage/needle"
-	"io"
-	"io/ioutil"
-	"math"
-	"os"
-	"path/filepath"
-	"sync"
-
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"io"
+	"io/ioutil"
+	"math"
+	"net/http"
+	"net/url"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
 )
 
 func init() {
@@ -28,7 +33,8 @@ func init() {
 }
 
 type commandVolumeFsck struct {
-	env *CommandEnv
+	env          *CommandEnv
+	forcePurging *bool
 }
 
 func (c *commandVolumeFsck) Name() string {
@@ -57,23 +63,28 @@ func (c *commandVolumeFsck) Help() string {
 
 func (c *commandVolumeFsck) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	fsckCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	verbose := fsckCommand.Bool("v", false, "verbose mode")
 	findMissingChunksInFiler := fsckCommand.Bool("findMissingChunksInFiler", false, "see \"help volume.fsck\"")
 	findMissingChunksInFilerPath := fsckCommand.String("findMissingChunksInFilerPath", "/", "used together with findMissingChunksInFiler")
-	applyPurging := fsckCommand.Bool("reallyDeleteFromVolume", false, "<expert only> delete data not referenced by the filer")
+	findMissingChunksInVolumeId := fsckCommand.Int("findMissingChunksInVolumeId", 0, "used together with findMissingChunksInFiler")
+	applyPurging := fsckCommand.Bool("reallyDeleteFromVolume", false, "<expert only!> after detection, delete missing data from volumes / delete missing file entries from filer. Currently this only works with default filerGroup.")
+	c.forcePurging = fsckCommand.Bool("forcePurging", false, "delete missing data from volumes in one replica used together with applyPurging")
+	purgeAbsent := fsckCommand.Bool("reallyDeleteFilerEntries", false, "<expert only!> delete missing file entries from filer if the corresponding volume is missing for any reason, please ensure all still existing/expected volumes are connected! used together with findMissingChunksInFiler")
+	tempPath := fsckCommand.String("tempPath", path.Join(os.TempDir()), "path for temporary idx files")
+
 	if err = fsckCommand.Parse(args); err != nil {
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	c.env = commandEnv
 
 	// create a temp folder
-	tempFolder, err := ioutil.TempDir("", "sw_fsck")
+	tempFolder, err := os.MkdirTemp(*tempPath, "sw_fsck")
 	if err != nil {
 		return fmt.Errorf("failed to create temp folder: %v", err)
 	}
@@ -83,35 +94,63 @@ func (c *commandVolumeFsck) Do(args []string, commandEnv *CommandEnv, writer io.
 	defer os.RemoveAll(tempFolder)
 
 	// collect all volume id locations
-	volumeIdToVInfo, err := c.collectVolumeIds(commandEnv, *verbose, writer)
+	dataNodeVolumeIdToVInfo, err := c.collectVolumeIds(commandEnv, *verbose, writer)
 	if err != nil {
 		return fmt.Errorf("failed to collect all volume locations: %v", err)
 	}
 
-	// collect each volume file ids
-	for volumeId, vinfo := range volumeIdToVInfo {
-		err = c.collectOneVolumeFileIds(tempFolder, volumeId, vinfo, *verbose, writer)
+	isBucketsPath := false
+	var fillerBucketsPath string
+	if *findMissingChunksInFiler && *findMissingChunksInFilerPath != "/" {
+		fillerBucketsPath, err = readFilerBucketsPath(commandEnv)
 		if err != nil {
-			return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, err)
+			return fmt.Errorf("read filer buckets path: %v", err)
+		}
+		if strings.HasPrefix(*findMissingChunksInFilerPath, fillerBucketsPath) {
+			isBucketsPath = true
+		}
+	}
+	if err != nil {
+		return fmt.Errorf("read filer buckets path: %v", err)
+	}
+
+	collectMtime := time.Now().Unix()
+	// collect each volume file ids
+	for dataNodeId, volumeIdToVInfo := range dataNodeVolumeIdToVInfo {
+		for volumeId, vinfo := range volumeIdToVInfo {
+			if *findMissingChunksInVolumeId > 0 && uint32(*findMissingChunksInVolumeId) != volumeId {
+				delete(volumeIdToVInfo, volumeId)
+				continue
+			}
+			if isBucketsPath && !strings.HasPrefix(*findMissingChunksInFilerPath, fillerBucketsPath+"/"+vinfo.collection) {
+				delete(volumeIdToVInfo, volumeId)
+				continue
+			}
+			err = c.collectOneVolumeFileIds(tempFolder, dataNodeId, volumeId, vinfo, *verbose, writer)
+			if err != nil {
+				return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, err)
+			}
 		}
 	}
 
 	if *findMissingChunksInFiler {
 		// collect all filer file ids and paths
-		if err = c.collectFilerFileIdAndPaths(volumeIdToVInfo, tempFolder, writer, *findMissingChunksInFilerPath, *verbose, applyPurging); err != nil {
+		if err = c.collectFilerFileIdAndPaths(dataNodeVolumeIdToVInfo, tempFolder, writer, *findMissingChunksInFilerPath, *verbose, *purgeAbsent, collectMtime); err != nil {
 			return fmt.Errorf("collectFilerFileIdAndPaths: %v", err)
 		}
-		// for each volume, check filer file ids
-		if err = c.findFilerChunksMissingInVolumeServers(volumeIdToVInfo, tempFolder, writer, *verbose, applyPurging); err != nil {
-			return fmt.Errorf("findFilerChunksMissingInVolumeServers: %v", err)
+		for dataNodeId, volumeIdToVInfo := range dataNodeVolumeIdToVInfo {
+			// for each volume, check filer file ids
+			if err = c.findFilerChunksMissingInVolumeServers(volumeIdToVInfo, tempFolder, dataNodeId, writer, *verbose, *applyPurging); err != nil {
+				return fmt.Errorf("findFilerChunksMissingInVolumeServers: %v", err)
+			}
 		}
 	} else {
 		// collect all filer file ids
-		if err = c.collectFilerFileIds(tempFolder, volumeIdToVInfo, *verbose, writer); err != nil {
+		if err = c.collectFilerFileIds(dataNodeVolumeIdToVInfo, tempFolder, writer, *verbose); err != nil {
 			return fmt.Errorf("failed to collect file ids from filer: %v", err)
 		}
-		// volume file ids substract filer file ids
-		if err = c.findExtraChunksInVolumeServers(volumeIdToVInfo, tempFolder, writer, *verbose, applyPurging); err != nil {
+		// volume file ids subtract filer file ids
+		if err = c.findExtraChunksInVolumeServers(dataNodeVolumeIdToVInfo, tempFolder, writer, *verbose, *applyPurging); err != nil {
 			return fmt.Errorf("findExtraChunksInVolumeServers: %v", err)
 		}
 	}
@@ -119,19 +158,24 @@ func (c *commandVolumeFsck) Do(args []string, commandEnv *CommandEnv, writer io.
 	return nil
 }
 
-func (c *commandVolumeFsck) collectFilerFileIdAndPaths(volumeIdToServer map[uint32]VInfo, tempFolder string, writer io.Writer, filerPath string, verbose bool, applyPurging *bool) error {
+func (c *commandVolumeFsck) collectFilerFileIdAndPaths(dataNodeVolumeIdToVInfo map[string]map[uint32]VInfo, tempFolder string, writer io.Writer, filerPath string, verbose bool, purgeAbsent bool, collectMtime int64) error {
 
 	if verbose {
 		fmt.Fprintf(writer, "checking each file from filer ...\n")
 	}
 
 	files := make(map[uint32]*os.File)
-	for vid := range volumeIdToServer {
-		dst, openErr := os.OpenFile(getFilerFileIdFile(tempFolder, vid), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-		if openErr != nil {
-			return fmt.Errorf("failed to create file %s: %v", getFilerFileIdFile(tempFolder, vid), openErr)
+	for _, volumeIdToServer := range dataNodeVolumeIdToVInfo {
+		for vid := range volumeIdToServer {
+			if _, ok := files[vid]; ok {
+				continue
+			}
+			dst, openErr := os.OpenFile(getFilerFileIdFile(tempFolder, vid), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+			if openErr != nil {
+				return fmt.Errorf("failed to create file %s: %v", getFilerFileIdFile(tempFolder, vid), openErr)
+			}
+			files[vid] = dst
 		}
-		files[vid] = dst
 	}
 	defer func() {
 		for _, f := range files {
@@ -145,31 +189,19 @@ func (c *commandVolumeFsck) collectFilerFileIdAndPaths(volumeIdToServer map[uint
 		cookie  uint32
 		path    util.FullPath
 	}
-	return doTraverseBfsAndSaving(c.env, nil, filerPath, false, func(outputChan chan interface{}) {
-		buffer := make([]byte, 16)
-		for item := range outputChan {
-			i := item.(*Item)
-			if f, ok := files[i.vid]; ok {
-				util.Uint64toBytes(buffer, i.fileKey)
-				util.Uint32toBytes(buffer[8:], i.cookie)
-				util.Uint32toBytes(buffer[12:], uint32(len(i.path)))
-				f.Write(buffer)
-				f.Write([]byte(i.path))
-				// fmt.Fprintf(writer, "%d,%x%08x %d %s\n", i.vid, i.fileKey, i.cookie, len(i.path), i.path)
-			} else {
-				fmt.Fprintf(writer, "%d,%x%08x %s volume not found\n", i.vid, i.fileKey, i.cookie, i.path)
-			}
-		}
-	}, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
+	return doTraverseBfsAndSaving(c.env, nil, filerPath, false, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
 		if verbose && entry.Entry.IsDirectory {
 			fmt.Fprintf(writer, "checking directory %s\n", util.NewFullPath(entry.Dir, entry.Entry.Name))
 		}
-		dChunks, mChunks, resolveErr := filer.ResolveChunkManifest(filer.LookupFn(c.env), entry.Entry.Chunks, 0, math.MaxInt64)
+		dataChunks, manifestChunks, resolveErr := filer.ResolveChunkManifest(filer.LookupFn(c.env), entry.Entry.Chunks, 0, math.MaxInt64)
 		if resolveErr != nil {
 			return nil
 		}
-		dChunks = append(dChunks, mChunks...)
-		for _, chunk := range dChunks {
+		dataChunks = append(dataChunks, manifestChunks...)
+		for _, chunk := range dataChunks {
+			if chunk.Mtime > collectMtime {
+				continue
+			}
 			outputChan <- &Item{
 				vid:     chunk.Fid.VolumeId,
 				fileKey: chunk.Fid.FileKey,
@@ -178,15 +210,33 @@ func (c *commandVolumeFsck) collectFilerFileIdAndPaths(volumeIdToServer map[uint
 			}
 		}
 		return nil
+	}, func(outputChan chan interface{}) {
+		buffer := make([]byte, 16)
+		for item := range outputChan {
+			i := item.(*Item)
+			if f, ok := files[i.vid]; ok {
+				util.Uint64toBytes(buffer, i.fileKey)
+				util.Uint32toBytes(buffer[8:], i.cookie)
+				util.Uint32toBytes(buffer[12:], uint32(len(i.path)))
+				f.Write(buffer)
+				f.Write([]byte(i.path))
+				// fmt.Fprintf(writer, "%d,%x%08x %d %s\n", i.vid, i.fileKey, i.cookie, len(i.path), i.path)
+			} else {
+				fmt.Fprintf(writer, "%d,%x%08x %s volume not found\n", i.vid, i.fileKey, i.cookie, i.path)
+				if purgeAbsent {
+					fmt.Printf("deleting path %s after volume not found", i.path)
+					c.httpDelete(i.path, verbose)
+				}
+			}
+		}
 	})
 
-	return nil
 }
 
-func (c *commandVolumeFsck) findFilerChunksMissingInVolumeServers(volumeIdToVInfo map[uint32]VInfo, tempFolder string, writer io.Writer, verbose bool, applyPurging *bool) error {
+func (c *commandVolumeFsck) findFilerChunksMissingInVolumeServers(volumeIdToVInfo map[uint32]VInfo, tempFolder string, dataNodeId string, writer io.Writer, verbose bool, applyPurging bool) error {
 
 	for volumeId, vinfo := range volumeIdToVInfo {
-		checkErr := c.oneVolumeFileIdsCheckOneVolume(tempFolder, volumeId, writer, verbose)
+		checkErr := c.oneVolumeFileIdsCheckOneVolume(tempFolder, dataNodeId, volumeId, writer, verbose, applyPurging)
 		if checkErr != nil {
 			return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, checkErr)
 		}
@@ -194,61 +244,120 @@ func (c *commandVolumeFsck) findFilerChunksMissingInVolumeServers(volumeIdToVInf
 	return nil
 }
 
-func (c *commandVolumeFsck) findExtraChunksInVolumeServers(volumeIdToVInfo map[uint32]VInfo, tempFolder string, writer io.Writer, verbose bool, applyPurging *bool) error {
-	var totalInUseCount, totalOrphanChunkCount, totalOrphanDataSize uint64
-	for volumeId, vinfo := range volumeIdToVInfo {
-		inUseCount, orphanFileIds, orphanDataSize, checkErr := c.oneVolumeFileIdsSubtractFilerFileIds(tempFolder, volumeId, writer, verbose)
-		if checkErr != nil {
-			return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, checkErr)
-		}
-		totalInUseCount += inUseCount
-		totalOrphanChunkCount += uint64(len(orphanFileIds))
-		totalOrphanDataSize += orphanDataSize
+func (c *commandVolumeFsck) findExtraChunksInVolumeServers(dataNodeVolumeIdToVInfo map[string]map[uint32]VInfo, tempFolder string, writer io.Writer, verbose bool, applyPurging bool) error {
 
-		if verbose {
+	var totalInUseCount, totalOrphanChunkCount, totalOrphanDataSize uint64
+	volumeIdOrphanFileIds := make(map[uint32]map[string]bool)
+	isSeveralReplicas := make(map[uint32]bool)
+	isEcVolumeReplicas := make(map[uint32]bool)
+	isReadOnlyReplicas := make(map[uint32]bool)
+	serverReplicas := make(map[uint32][]pb.ServerAddress)
+	for dataNodeId, volumeIdToVInfo := range dataNodeVolumeIdToVInfo {
+		for volumeId, vinfo := range volumeIdToVInfo {
+			inUseCount, orphanFileIds, orphanDataSize, checkErr := c.oneVolumeFileIdsSubtractFilerFileIds(tempFolder, dataNodeId, volumeId, writer, verbose)
+			if checkErr != nil {
+				return fmt.Errorf("failed to collect file ids from volume %d on %s: %v", volumeId, vinfo.server, checkErr)
+			}
+			isSeveralReplicas[volumeId] = false
+			if _, found := volumeIdOrphanFileIds[volumeId]; !found {
+				volumeIdOrphanFileIds[volumeId] = make(map[string]bool)
+			} else {
+				isSeveralReplicas[volumeId] = true
+			}
 			for _, fid := range orphanFileIds {
-				fmt.Fprintf(writer, "%s\n", fid)
+				if isSeveralReplicas[volumeId] {
+					if _, found := volumeIdOrphanFileIds[volumeId][fid]; !found {
+						continue
+					}
+				}
+				volumeIdOrphanFileIds[volumeId][fid] = isSeveralReplicas[volumeId]
+			}
+
+			totalInUseCount += inUseCount
+			totalOrphanChunkCount += uint64(len(orphanFileIds))
+			totalOrphanDataSize += orphanDataSize
+
+			if verbose {
+				for _, fid := range orphanFileIds {
+					fmt.Fprintf(writer, "%s\n", fid)
+				}
 			}
+			isEcVolumeReplicas[volumeId] = vinfo.isEcVolume
+			if isReadOnly, found := isReadOnlyReplicas[volumeId]; !(found && isReadOnly) {
+				isReadOnlyReplicas[volumeId] = vinfo.isReadOnly
+			}
+			serverReplicas[volumeId] = append(serverReplicas[volumeId], vinfo.server)
 		}
 
-		if *applyPurging && len(orphanFileIds) > 0 {
-			if vinfo.isEcVolume {
-				fmt.Fprintf(writer, "Skip purging for Erasure Coded volumes.\n")
+		for volumeId, orphanReplicaFileIds := range volumeIdOrphanFileIds {
+			if !(applyPurging && len(orphanReplicaFileIds) > 0) {
+				continue
 			}
-			if inUseCount == 0 {
-				if err := deleteVolume(c.env.option.GrpcDialOption, needle.VolumeId(volumeId), vinfo.server); err != nil {
-					return fmt.Errorf("delete volume %d: %v\n", volumeId, err)
+			orphanFileIds := []string{}
+			for fid, foundInAllReplicas := range orphanReplicaFileIds {
+				if !isSeveralReplicas[volumeId] || *c.forcePurging || (isSeveralReplicas[volumeId] && foundInAllReplicas) {
+					orphanFileIds = append(orphanFileIds, fid)
 				}
-			} else {
+			}
+			if !(len(orphanFileIds) > 0) {
+				continue
+			}
+			if verbose {
+				fmt.Fprintf(writer, "purging process for volume %d.\n", volumeId)
+			}
+
+			if isEcVolumeReplicas[volumeId] {
+				fmt.Fprintf(writer, "skip purging for Erasure Coded volume %d.\n", volumeId)
+				continue
+			}
+			for _, server := range serverReplicas[volumeId] {
+				needleVID := needle.VolumeId(volumeId)
+
+				if isReadOnlyReplicas[volumeId] {
+					err := markVolumeWritable(c.env.option.GrpcDialOption, needleVID, server, true)
+					if err != nil {
+						return fmt.Errorf("mark volume %d read/write: %v", volumeId, err)
+					}
+
+					fmt.Fprintf(writer, "temporarily marked %d on server %v writable for forced purge\n", volumeId, server)
+					defer markVolumeWritable(c.env.option.GrpcDialOption, needleVID, server, false)
+
+					fmt.Fprintf(writer, "marked %d on server %v writable for forced purge\n", volumeId, server)
+				}
+				if verbose {
+					fmt.Fprintf(writer, "purging files from volume %d\n", volumeId)
+				}
+
 				if err := c.purgeFileIdsForOneVolume(volumeId, orphanFileIds, writer); err != nil {
-					return fmt.Errorf("purge for volume %d: %v\n", volumeId, err)
+					return fmt.Errorf("purging volume %d: %v", volumeId, err)
 				}
 			}
 		}
 	}
 
-	if totalOrphanChunkCount == 0 {
-		fmt.Fprintf(writer, "no orphan data\n")
-		return nil
-	}
-
-	if !*applyPurging {
+	if !applyPurging {
 		pct := float64(totalOrphanChunkCount*100) / (float64(totalOrphanChunkCount + totalInUseCount))
 		fmt.Fprintf(writer, "\nTotal\t\tentries:%d\torphan:%d\t%.2f%%\t%dB\n",
 			totalOrphanChunkCount+totalInUseCount, totalOrphanChunkCount, pct, totalOrphanDataSize)
 
 		fmt.Fprintf(writer, "This could be normal if multiple filers or no filers are used.\n")
 	}
+
+	if totalOrphanChunkCount == 0 {
+		fmt.Fprintf(writer, "no orphan data\n")
+		//return nil
+	}
+
 	return nil
 }
 
-func (c *commandVolumeFsck) collectOneVolumeFileIds(tempFolder string, volumeId uint32, vinfo VInfo, verbose bool, writer io.Writer) error {
+func (c *commandVolumeFsck) collectOneVolumeFileIds(tempFolder string, dataNodeId string, volumeId uint32, vinfo VInfo, verbose bool, writer io.Writer) error {
 
 	if verbose {
 		fmt.Fprintf(writer, "collecting volume %d file ids from %s ...\n", volumeId, vinfo.server)
 	}
 
-	return operation.WithVolumeServerClient(vinfo.server, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(false, vinfo.server, c.env.option.GrpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 
 		ext := ".idx"
 		if vinfo.isEcVolume {
@@ -268,7 +377,7 @@ func (c *commandVolumeFsck) collectOneVolumeFileIds(tempFolder string, volumeId
 			return fmt.Errorf("failed to start copying volume %d%s: %v", volumeId, ext, err)
 		}
 
-		err = writeToFile(copyFileClient, getVolumeFileIdFile(tempFolder, volumeId))
+		err = writeToFile(copyFileClient, getVolumeFileIdFile(tempFolder, dataNodeId, volumeId))
 		if err != nil {
 			return fmt.Errorf("failed to copy %d%s from %s: %v", volumeId, ext, vinfo.server, err)
 		}
@@ -279,19 +388,21 @@ func (c *commandVolumeFsck) collectOneVolumeFileIds(tempFolder string, volumeId
 
 }
 
-func (c *commandVolumeFsck) collectFilerFileIds(tempFolder string, volumeIdToServer map[uint32]VInfo, verbose bool, writer io.Writer) error {
+func (c *commandVolumeFsck) collectFilerFileIds(dataNodeVolumeIdToVInfo map[string]map[uint32]VInfo, tempFolder string, writer io.Writer, verbose bool) error {
 
 	if verbose {
 		fmt.Fprintf(writer, "collecting file ids from filer ...\n")
 	}
 
 	files := make(map[uint32]*os.File)
-	for vid := range volumeIdToServer {
-		dst, openErr := os.OpenFile(getFilerFileIdFile(tempFolder, vid), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-		if openErr != nil {
-			return fmt.Errorf("failed to create file %s: %v", getFilerFileIdFile(tempFolder, vid), openErr)
+	for _, volumeIdToServer := range dataNodeVolumeIdToVInfo {
+		for vid := range volumeIdToServer {
+			dst, openErr := os.OpenFile(getFilerFileIdFile(tempFolder, vid), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+			if openErr != nil {
+				return fmt.Errorf("failed to create file %s: %v", getFilerFileIdFile(tempFolder, vid), openErr)
+			}
+			files[vid] = dst
 		}
-		files[vid] = dst
 	}
 	defer func() {
 		for _, f := range files {
@@ -303,42 +414,42 @@ func (c *commandVolumeFsck) collectFilerFileIds(tempFolder string, volumeIdToSer
 		vid     uint32
 		fileKey uint64
 	}
-	return doTraverseBfsAndSaving(c.env, nil, "/", false, func(outputChan chan interface{}) {
-		buffer := make([]byte, 8)
-		for item := range outputChan {
-			i := item.(*Item)
-			util.Uint64toBytes(buffer, i.fileKey)
-			files[i.vid].Write(buffer)
-		}
-	}, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
-		dChunks, mChunks, resolveErr := filer.ResolveChunkManifest(filer.LookupFn(c.env), entry.Entry.Chunks, 0, math.MaxInt64)
+	return doTraverseBfsAndSaving(c.env, nil, "/", false, func(entry *filer_pb.FullEntry, outputChan chan interface{}) (err error) {
+		dataChunks, manifestChunks, resolveErr := filer.ResolveChunkManifest(filer.LookupFn(c.env), entry.Entry.Chunks, 0, math.MaxInt64)
 		if resolveErr != nil {
 			if verbose {
 				fmt.Fprintf(writer, "resolving manifest chunks in %s: %v\n", util.NewFullPath(entry.Dir, entry.Entry.Name), resolveErr)
 			}
 			return nil
 		}
-		dChunks = append(dChunks, mChunks...)
-		for _, chunk := range dChunks {
+		dataChunks = append(dataChunks, manifestChunks...)
+		for _, chunk := range dataChunks {
 			outputChan <- &Item{
 				vid:     chunk.Fid.VolumeId,
 				fileKey: chunk.Fid.FileKey,
 			}
 		}
 		return nil
+	}, func(outputChan chan interface{}) {
+		buffer := make([]byte, 8)
+		for item := range outputChan {
+			i := item.(*Item)
+			util.Uint64toBytes(buffer, i.fileKey)
+			files[i.vid].Write(buffer)
+		}
 	})
 }
 
-func (c *commandVolumeFsck) oneVolumeFileIdsCheckOneVolume(tempFolder string, volumeId uint32, writer io.Writer, verbose bool) (err error) {
+func (c *commandVolumeFsck) oneVolumeFileIdsCheckOneVolume(tempFolder string, dataNodeId string, volumeId uint32, writer io.Writer, verbose bool, applyPurging bool) (err error) {
 
 	if verbose {
-		fmt.Fprintf(writer, "find missing file chuns in volume %d ...\n", volumeId)
+		fmt.Fprintf(writer, "find missing file chunks in dataNodeId %s volume %d ...\n", dataNodeId, volumeId)
 	}
 
 	db := needle_map.NewMemDb()
 	defer db.Close()
 
-	if err = db.LoadFromIdx(getVolumeFileIdFile(tempFolder, volumeId)); err != nil {
+	if err = db.LoadFromIdx(getVolumeFileIdFile(tempFolder, dataNodeId, volumeId)); err != nil {
 		return
 	}
 
@@ -362,11 +473,7 @@ func (c *commandVolumeFsck) oneVolumeFileIdsCheckOneVolume(tempFolder string, vo
 	for {
 		readSize, err = io.ReadFull(br, buffer)
 		if err != nil || readSize != 16 {
-			if err == io.EOF {
-				return nil
-			} else {
-				break
-			}
+			break
 		}
 
 		item.fileKey = util.BytesToUint64(buffer[:8])
@@ -382,26 +489,63 @@ func (c *commandVolumeFsck) oneVolumeFileIdsCheckOneVolume(tempFolder string, vo
 		}
 		item.path = util.FullPath(string(pathBytes))
 
-		if _, found := db.Get(types.NeedleId(item.fileKey)); !found {
-			fmt.Fprintf(writer, "%d,%x%08x in %s %d not found\n", volumeId, item.fileKey, item.cookie, item.path, pathSize)
+		needleId := types.NeedleId(item.fileKey)
+		if _, found := db.Get(needleId); !found {
+			fmt.Fprintf(writer, "%s\n", item.path)
+
+			if applyPurging {
+				// defining the URL this way automatically escapes complex path names
+				c.httpDelete(item.path, verbose)
+			}
 		}
+	}
+	return nil
+}
 
+func (c *commandVolumeFsck) httpDelete(path util.FullPath, verbose bool) {
+	req, err := http.NewRequest(http.MethodDelete, "", nil)
+
+	req.URL = &url.URL{
+		Scheme: "http",
+		Host:   c.env.option.FilerAddress.ToHttpAddress(),
+		Path:   string(path),
+	}
+	if verbose {
+		fmt.Printf("full HTTP delete request to be sent: %v\n", req)
+	}
+	if err != nil {
+		fmt.Errorf("HTTP delete request error: %v\n", err)
 	}
 
-	return
+	client := &http.Client{}
 
+	resp, err := client.Do(req)
+	if err != nil {
+		fmt.Errorf("DELETE fetch error: %v\n", err)
+	}
+	defer resp.Body.Close()
+
+	_, err = ioutil.ReadAll(resp.Body)
+	if err != nil {
+		fmt.Errorf("DELETE response error: %v\n", err)
+	}
+
+	if verbose {
+		fmt.Println("delete response Status : ", resp.Status)
+		fmt.Println("delete response Headers : ", resp.Header)
+	}
 }
 
-func (c *commandVolumeFsck) oneVolumeFileIdsSubtractFilerFileIds(tempFolder string, volumeId uint32, writer io.Writer, verbose bool) (inUseCount uint64, orphanFileIds []string, orphanDataSize uint64, err error) {
+func (c *commandVolumeFsck) oneVolumeFileIdsSubtractFilerFileIds(tempFolder string, dataNodeId string, volumeId uint32, writer io.Writer, verbose bool) (inUseCount uint64, orphanFileIds []string, orphanDataSize uint64, err error) {
 
 	db := needle_map.NewMemDb()
 	defer db.Close()
 
-	if err = db.LoadFromIdx(getVolumeFileIdFile(tempFolder, volumeId)); err != nil {
+	if err = db.LoadFromIdx(getVolumeFileIdFile(tempFolder, dataNodeId, volumeId)); err != nil {
 		return
 	}
 
-	filerFileIdsData, err := ioutil.ReadFile(getFilerFileIdFile(tempFolder, volumeId))
+	filerFileIdsData, err := os.ReadFile(getFilerFileIdFile(tempFolder, volumeId))
 	if err != nil {
 		return
 	}
@@ -428,8 +572,8 @@ func (c *commandVolumeFsck) oneVolumeFileIdsSubtractFilerFileIds(tempFolder stri
 
 	if orphanFileCount > 0 {
 		pct := float64(orphanFileCount*100) / (float64(orphanFileCount + inUseCount))
-		fmt.Fprintf(writer, "volume:%d\tentries:%d\torphan:%d\t%.2f%%\t%dB\n",
-			volumeId, orphanFileCount+inUseCount, orphanFileCount, pct, orphanDataSize)
+		fmt.Fprintf(writer, "dataNode:%s\tvolume:%d\tentries:%d\torphan:%d\t%.2f%%\t%dB\n",
+			dataNodeId, volumeId, orphanFileCount+inUseCount, orphanFileCount, pct, orphanDataSize)
 	}
 
 	return
@@ -437,38 +581,43 @@ func (c *commandVolumeFsck) oneVolumeFileIdsSubtractFilerFileIds(tempFolder stri
 }
 
 type VInfo struct {
-	server     string
+	server     pb.ServerAddress
 	collection string
 	isEcVolume bool
+	isReadOnly bool
 }
 
-func (c *commandVolumeFsck) collectVolumeIds(commandEnv *CommandEnv, verbose bool, writer io.Writer) (volumeIdToServer map[uint32]VInfo, err error) {
+func (c *commandVolumeFsck) collectVolumeIds(commandEnv *CommandEnv, verbose bool, writer io.Writer) (volumeIdToServer map[string]map[uint32]VInfo, err error) {
 
 	if verbose {
 		fmt.Fprintf(writer, "collecting volume id and locations from master ...\n")
 	}
 
-	volumeIdToServer = make(map[uint32]VInfo)
+	volumeIdToServer = make(map[string]map[uint32]VInfo)
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return
 	}
 
 	eachDataNode(topologyInfo, func(dc string, rack RackId, t *master_pb.DataNodeInfo) {
 		for _, diskInfo := range t.DiskInfos {
+			dataNodeId := t.GetId()
+			volumeIdToServer[dataNodeId] = make(map[uint32]VInfo)
 			for _, vi := range diskInfo.VolumeInfos {
-				volumeIdToServer[vi.Id] = VInfo{
-					server:     t.Id,
+				volumeIdToServer[dataNodeId][vi.Id] = VInfo{
+					server:     pb.NewServerAddressFromDataNode(t),
 					collection: vi.Collection,
 					isEcVolume: false,
+					isReadOnly: vi.ReadOnly,
 				}
 			}
 			for _, ecShardInfo := range diskInfo.EcShardInfos {
-				volumeIdToServer[ecShardInfo.Id] = VInfo{
-					server:     t.Id,
+				volumeIdToServer[dataNodeId][ecShardInfo.Id] = VInfo{
+					server:     pb.NewServerAddressFromDataNode(t),
 					collection: ecShardInfo.Collection,
 					isEcVolume: true,
+					isReadOnly: true,
 				}
 			}
 		}
@@ -491,7 +640,7 @@ func (c *commandVolumeFsck) purgeFileIdsForOneVolume(volumeId uint32, fileIds []
 	var wg sync.WaitGroup
 	for _, location := range locations {
 		wg.Add(1)
-		go func(server string, fidList []string) {
+		go func(server pb.ServerAddress, fidList []string) {
 			defer wg.Done()
 
 			if deleteResults, deleteErr := operation.DeleteFilesAtOneVolumeServer(server, c.env.option.GrpcDialOption, fidList, false); deleteErr != nil {
@@ -500,7 +649,7 @@ func (c *commandVolumeFsck) purgeFileIdsForOneVolume(volumeId uint32, fileIds []
 				resultChan <- deleteResults
 			}
 
-		}(location.Url, fileIds)
+		}(location.ServerAddress(), fileIds)
 	}
 	wg.Wait()
 	close(resultChan)
@@ -516,8 +665,8 @@ func (c *commandVolumeFsck) purgeFileIdsForOneVolume(volumeId uint32, fileIds []
 	return
 }
 
-func getVolumeFileIdFile(tempFolder string, vid uint32) string {
-	return filepath.Join(tempFolder, fmt.Sprintf("%d.idx", vid))
+func getVolumeFileIdFile(tempFolder string, dataNodeid string, vid uint32) string {
+	return filepath.Join(tempFolder, fmt.Sprintf("%s_%d.idx", dataNodeid, vid))
 }
 
 func getFilerFileIdFile(tempFolder string, vid uint32) string {
diff --git a/weed/shell/command_volume_list.go b/weed/shell/command_volume_list.go
index 9856de10b..3a5633168 100644
--- a/weed/shell/command_volume_list.go
+++ b/weed/shell/command_volume_list.go
@@ -2,12 +2,14 @@ package shell
 
 import (
 	"bytes"
+	"flag"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
+	"golang.org/x/exp/slices"
+	"path/filepath"
 
 	"io"
-	"sort"
 )
 
 func init() {
@@ -15,6 +17,9 @@ func init() {
 }
 
 type commandVolumeList struct {
+	collectionPattern *string
+	readonly          *bool
+	volumeId          *uint64
 }
 
 func (c *commandVolumeList) Name() string {
@@ -31,13 +36,23 @@ func (c *commandVolumeList) Help() string {
 
 func (c *commandVolumeList) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
+	volumeListCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	verbosityLevel := volumeListCommand.Int("v", 5, "verbose mode: 0, 1, 2, 3, 4, 5")
+	c.collectionPattern = volumeListCommand.String("collectionPattern", "", "match with wildcard characters '*' and '?'")
+	c.readonly = volumeListCommand.Bool("readonly", false, "show only readonly")
+	c.volumeId = volumeListCommand.Uint64("volumeId", 0, "show only volume id")
+
+	if err = volumeListCommand.Parse(args); err != nil {
+		return nil
+	}
+
 	// collect topology information
-	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv)
+	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
 
-	writeTopologyInfo(writer, topologyInfo, volumeSizeLimitMb)
+	c.writeTopologyInfo(writer, topologyInfo, volumeSizeLimitMb, *verbosityLevel)
 	return nil
 }
 
@@ -58,77 +73,107 @@ func diskInfoToString(diskInfo *master_pb.DiskInfo) string {
 	return buf.String()
 }
 
-func writeTopologyInfo(writer io.Writer, t *master_pb.TopologyInfo, volumeSizeLimitMb uint64) statistics {
-	fmt.Fprintf(writer, "Topology volumeSizeLimit:%d MB%s\n", volumeSizeLimitMb, diskInfosToString(t.DiskInfos))
-	sort.Slice(t.DataCenterInfos, func(i, j int) bool {
-		return t.DataCenterInfos[i].Id < t.DataCenterInfos[j].Id
+func (c *commandVolumeList) writeTopologyInfo(writer io.Writer, t *master_pb.TopologyInfo, volumeSizeLimitMb uint64, verbosityLevel int) statistics {
+	output(verbosityLevel >= 0, writer, "Topology volumeSizeLimit:%d MB%s\n", volumeSizeLimitMb, diskInfosToString(t.DiskInfos))
+	slices.SortFunc(t.DataCenterInfos, func(a, b *master_pb.DataCenterInfo) bool {
+		return a.Id < b.Id
 	})
 	var s statistics
 	for _, dc := range t.DataCenterInfos {
-		s = s.plus(writeDataCenterInfo(writer, dc))
+		s = s.plus(c.writeDataCenterInfo(writer, dc, verbosityLevel))
 	}
-	fmt.Fprintf(writer, "%+v \n", s)
+	output(verbosityLevel >= 0, writer, "%+v \n", s)
 	return s
 }
-func writeDataCenterInfo(writer io.Writer, t *master_pb.DataCenterInfo) statistics {
-	fmt.Fprintf(writer, "  DataCenter %s%s\n", t.Id, diskInfosToString(t.DiskInfos))
+
+func (c *commandVolumeList) writeDataCenterInfo(writer io.Writer, t *master_pb.DataCenterInfo, verbosityLevel int) statistics {
+	output(verbosityLevel >= 1, writer, "  DataCenter %s%s\n", t.Id, diskInfosToString(t.DiskInfos))
 	var s statistics
-	sort.Slice(t.RackInfos, func(i, j int) bool {
-		return t.RackInfos[i].Id < t.RackInfos[j].Id
+	slices.SortFunc(t.RackInfos, func(a, b *master_pb.RackInfo) bool {
+		return a.Id < b.Id
 	})
 	for _, r := range t.RackInfos {
-		s = s.plus(writeRackInfo(writer, r))
+		s = s.plus(c.writeRackInfo(writer, r, verbosityLevel))
 	}
-	fmt.Fprintf(writer, "  DataCenter %s %+v \n", t.Id, s)
+	output(verbosityLevel >= 1, writer, "  DataCenter %s %+v \n", t.Id, s)
 	return s
 }
-func writeRackInfo(writer io.Writer, t *master_pb.RackInfo) statistics {
-	fmt.Fprintf(writer, "    Rack %s%s\n", t.Id, diskInfosToString(t.DiskInfos))
+
+func (c *commandVolumeList) writeRackInfo(writer io.Writer, t *master_pb.RackInfo, verbosityLevel int) statistics {
+	output(verbosityLevel >= 2, writer, "    Rack %s%s\n", t.Id, diskInfosToString(t.DiskInfos))
 	var s statistics
-	sort.Slice(t.DataNodeInfos, func(i, j int) bool {
-		return t.DataNodeInfos[i].Id < t.DataNodeInfos[j].Id
+	slices.SortFunc(t.DataNodeInfos, func(a, b *master_pb.DataNodeInfo) bool {
+		return a.Id < b.Id
 	})
 	for _, dn := range t.DataNodeInfos {
-		s = s.plus(writeDataNodeInfo(writer, dn))
+		s = s.plus(c.writeDataNodeInfo(writer, dn, verbosityLevel))
 	}
-	fmt.Fprintf(writer, "    Rack %s %+v \n", t.Id, s)
+	output(verbosityLevel >= 2, writer, "    Rack %s %+v \n", t.Id, s)
 	return s
 }
-func writeDataNodeInfo(writer io.Writer, t *master_pb.DataNodeInfo) statistics {
-	fmt.Fprintf(writer, "      DataNode %s%s\n", t.Id, diskInfosToString(t.DiskInfos))
+
+func (c *commandVolumeList) writeDataNodeInfo(writer io.Writer, t *master_pb.DataNodeInfo, verbosityLevel int) statistics {
+	output(verbosityLevel >= 3, writer, "      DataNode %s%s\n", t.Id, diskInfosToString(t.DiskInfos))
 	var s statistics
 	for _, diskInfo := range t.DiskInfos {
-		s = s.plus(writeDiskInfo(writer, diskInfo))
+		s = s.plus(c.writeDiskInfo(writer, diskInfo, verbosityLevel))
 	}
-	fmt.Fprintf(writer, "      DataNode %s %+v \n", t.Id, s)
+	output(verbosityLevel >= 3, writer, "      DataNode %s %+v \n", t.Id, s)
 	return s
 }
 
-func writeDiskInfo(writer io.Writer, t *master_pb.DiskInfo) statistics {
+func (c *commandVolumeList) isNotMatchDiskInfo(readOnly bool, collection string, volumeId uint32) bool {
+	if *c.readonly && !readOnly {
+		return true
+	}
+	if *c.collectionPattern != "" {
+		if matched, _ := filepath.Match(*c.collectionPattern, collection); !matched {
+			return true
+		}
+	}
+	if *c.volumeId > 0 && *c.volumeId != uint64(volumeId) {
+		return true
+	}
+	return false
+}
+
+func (c *commandVolumeList) writeDiskInfo(writer io.Writer, t *master_pb.DiskInfo, verbosityLevel int) statistics {
 	var s statistics
 	diskType := t.Type
 	if diskType == "" {
 		diskType = "hdd"
 	}
-	fmt.Fprintf(writer, "        Disk %s(%s)\n", diskType, diskInfoToString(t))
-	sort.Slice(t.VolumeInfos, func(i, j int) bool {
-		return t.VolumeInfos[i].Id < t.VolumeInfos[j].Id
+	output(verbosityLevel >= 4, writer, "        Disk %s(%s)\n", diskType, diskInfoToString(t))
+	slices.SortFunc(t.VolumeInfos, func(a, b *master_pb.VolumeInformationMessage) bool {
+		return a.Id < b.Id
 	})
 	for _, vi := range t.VolumeInfos {
-		s = s.plus(writeVolumeInformationMessage(writer, vi))
+		if c.isNotMatchDiskInfo(vi.ReadOnly, vi.Collection, vi.Id) {
+			continue
+		}
+		s = s.plus(writeVolumeInformationMessage(writer, vi, verbosityLevel))
 	}
 	for _, ecShardInfo := range t.EcShardInfos {
-		fmt.Fprintf(writer, "          ec volume id:%v collection:%v shards:%v\n", ecShardInfo.Id, ecShardInfo.Collection, erasure_coding.ShardBits(ecShardInfo.EcIndexBits).ShardIds())
+		if c.isNotMatchDiskInfo(false, ecShardInfo.Collection, ecShardInfo.Id) {
+			continue
+		}
+		output(verbosityLevel >= 5, writer, "          ec volume id:%v collection:%v shards:%v\n", ecShardInfo.Id, ecShardInfo.Collection, erasure_coding.ShardBits(ecShardInfo.EcIndexBits).ShardIds())
 	}
-	fmt.Fprintf(writer, "        Disk %s %+v \n", diskType, s)
+	output(verbosityLevel >= 4, writer, "        Disk %s %+v \n", diskType, s)
 	return s
 }
 
-func writeVolumeInformationMessage(writer io.Writer, t *master_pb.VolumeInformationMessage) statistics {
-	fmt.Fprintf(writer, "          volume %+v \n", t)
+func writeVolumeInformationMessage(writer io.Writer, t *master_pb.VolumeInformationMessage, verbosityLevel int) statistics {
+	output(verbosityLevel >= 5, writer, "          volume %+v \n", t)
 	return newStatistics(t)
 }
 
+func output(condition bool, w io.Writer, format string, a ...interface{}) {
+	if condition {
+		fmt.Fprintf(w, format, a...)
+	}
+}
+
 type statistics struct {
 	Size             uint64
 	FileCount        uint64
diff --git a/weed/shell/command_volume_list_test.go b/weed/shell/command_volume_list_test.go
index 379cf4943..0bcbb1713 100644
--- a/weed/shell/command_volume_list_test.go
+++ b/weed/shell/command_volume_list_test.go
@@ -1,6 +1,7 @@
 package shell
 
 import (
+	_ "embed"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
 	"github.com/golang/protobuf/proto"
 	"github.com/stretchr/testify/assert"
@@ -64,11 +65,14 @@ func parseOutput(output string) *master_pb.TopologyInfo {
 		case "Disk":
 			if disk == nil {
 				diskType := parts[1][:strings.Index(parts[1], "(")]
+				volumeCountStr := parts[1][strings.Index(parts[1], ":")+1 : strings.Index(parts[1], "/")]
 				maxVolumeCountStr := parts[1][strings.Index(parts[1], "/")+1:]
 				maxVolumeCount, _ := strconv.Atoi(maxVolumeCountStr)
+				volumeCount, _ := strconv.Atoi(volumeCountStr)
 				disk = &master_pb.DiskInfo{
 					Type:           diskType,
 					MaxVolumeCount: int64(maxVolumeCount),
+					VolumeCount:    int64(volumeCount),
 				}
 				dn.DiskInfos[types.ToDiskType(diskType).String()] = disk
 			} else {
@@ -85,809 +89,5 @@ func parseOutput(output string) *master_pb.TopologyInfo {
 	return topo
 }
 
-const topoData = `
-Topology volumeSizeLimit:1024 MB hdd(volume:760/7280 active:760 free:6520 remote:0)
-  DataCenter dc1 hdd(volume:0/0 active:0 free:0 remote:0)
-    Rack DefaultRack hdd(volume:0/0 active:0 free:0 remote:0)
-    Rack DefaultRack total size:0 file_count:0 
-  DataCenter dc1 total size:0 file_count:0 
-  DataCenter dc2 hdd(volume:86/430 active:86 free:344 remote:0)
-    Rack rack1 hdd(volume:50/240 active:50 free:190 remote:0)
-      DataNode 192.168.1.4:8080 hdd(volume:50/240 active:50 free:190 remote:0)
-        Disk hdd(volume:50/240 active:50 free:190 remote:0)
-          volume id:15  size:1115965064  collection:"collection0"  file_count:83  replica_placement:100  version:3  modified_at_second:1609923671 
-          volume id:21  size:1097631536  collection:"collection0"  file_count:82  delete_count:7  deleted_byte_count:68975485  replica_placement:100  version:3  modified_at_second:1609929578 
-          volume id:22  size:1086828272  collection:"collection0"  file_count:75  replica_placement:100  version:3  modified_at_second:1609930001 
-          volume id:23  size:1076380216  collection:"collection0"  file_count:68  replica_placement:100  version:3  modified_at_second:1609930434 
-          volume id:24  size:1074139776  collection:"collection0"  file_count:90  replica_placement:100  version:3  modified_at_second:1609930909 
-          volume id:25  size:690757512  collection:"collection0"  file_count:38  replica_placement:100  version:3  modified_at_second:1611144216 
-          volume id:27  size:298886792  file_count:1608  replica_placement:100  version:3  modified_at_second:1615632482 
-          volume id:28  size:308919192  file_count:1591  delete_count:1  deleted_byte_count:125280  replica_placement:100  version:3  modified_at_second:1615631762 
-          volume id:29  size:281582680  file_count:1537  replica_placement:100  version:3  modified_at_second:1615629422 
-          volume id:30  size:289466144  file_count:1566  delete_count:1  deleted_byte_count:124972  replica_placement:100  version:3  modified_at_second:1615632422 
-          volume id:31  size:273363256  file_count:1498  replica_placement:100  version:3  modified_at_second:1615631642 
-          volume id:33  size:1130226400  collection:"collection1"  file_count:7322  delete_count:172  deleted_byte_count:45199399  replica_placement:100  version:3  modified_at_second:1615618789 
-          volume id:38  size:1075545744  collection:"collection1"  file_count:13324  delete_count:100  deleted_byte_count:25223906  replica_placement:100  version:3  modified_at_second:1615569830 
-          volume id:51  size:1076796120  collection:"collection1"  file_count:10550  delete_count:39  deleted_byte_count:12723654  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615547786 
-          volume id:52  size:1083529728  collection:"collection1"  file_count:10128  delete_count:32  deleted_byte_count:10608391  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615599195 
-          volume id:54  size:1045022344  collection:"collection1"  file_count:9408  delete_count:30  deleted_byte_count:15132106  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630812 
-          volume id:63  size:956941112  collection:"collection1"  file_count:8271  delete_count:32  deleted_byte_count:15876189  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632036 
-          volume id:69  size:869213648  collection:"collection1"  file_count:7293  delete_count:102  deleted_byte_count:30643207  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630534 
-          volume id:74  size:957046128  collection:"collection1"  file_count:6982  delete_count:258  deleted_byte_count:73054259  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631460 
-          volume id:80  size:827912928  collection:"collection1"  file_count:6914  delete_count:17  deleted_byte_count:5689635  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631157 
-          volume id:84  size:873121856  collection:"collection1"  file_count:8200  delete_count:13  deleted_byte_count:3131676  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631161 
-          volume id:85  size:1023869320  collection:"collection1"  file_count:7788  delete_count:234  deleted_byte_count:78037967  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631723 
-          volume id:97  size:1053112992  collection:"collection1"  file_count:6789  delete_count:50  deleted_byte_count:38894001  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631193 
-          volume id:98  size:1077836440  collection:"collection1"  file_count:7605  delete_count:202  deleted_byte_count:73180379  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615523691 
-          volume id:105  size:1073996824  collection:"collection1"  file_count:6872  delete_count:20  deleted_byte_count:14482293  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615499757 
-          volume id:106  size:1075458664  collection:"collection1"  file_count:7182  delete_count:307  deleted_byte_count:69349053  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615598137 
-          volume id:112  size:1076392512  collection:"collection1"  file_count:8291  delete_count:156  deleted_byte_count:74120183  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615569823 
-          volume id:116  size:1074489504  collection:"collection1"  file_count:9981  delete_count:174  deleted_byte_count:53998777  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615611565 
-          volume id:119  size:1075940104  collection:"collection1"  file_count:9003  delete_count:12  deleted_byte_count:9128155  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615573878 
-          volume id:128  size:1074874632  collection:"collection1"  file_count:9821  delete_count:148  deleted_byte_count:43633334  replica_placement:100  version:3  modified_at_second:1615602670 
-          volume id:133  size:1075952760  collection:"collection1"  file_count:9538  delete_count:74  deleted_byte_count:19558008  replica_placement:100  version:3  modified_at_second:1615584779 
-          volume id:136  size:1074433552  collection:"collection1"  file_count:9593  delete_count:72  deleted_byte_count:26912512  replica_placement:100  version:3  modified_at_second:1615376036 
-          volume id:138  size:1074465744  collection:"collection1"  file_count:10120  delete_count:55  deleted_byte_count:15875438  replica_placement:100  version:3  modified_at_second:1615572231 
-          volume id:140  size:1076203744  collection:"collection1"  file_count:11219  delete_count:57  deleted_byte_count:19864498  replica_placement:100  version:3  modified_at_second:1615571947 
-          volume id:144  size:1074549720  collection:"collection1"  file_count:8780  delete_count:50  deleted_byte_count:52475146  replica_placement:100  version:3  modified_at_second:1615573451 
-          volume id:161  size:1077397192  collection:"collection1"  file_count:9988  delete_count:28  deleted_byte_count:12509164  replica_placement:100  version:3  modified_at_second:1615631452 
-          volume id:173  size:1074154704  collection:"collection1"  file_count:30884  delete_count:34  deleted_byte_count:2578509  replica_placement:100  version:3  modified_at_second:1615591904 
-          volume id:174  size:1073824232  collection:"collection1"  file_count:30689  delete_count:36  deleted_byte_count:2160116  replica_placement:100  version:3  modified_at_second:1615598914 
-          volume id:197  size:1075423240  collection:"collection1"  file_count:16473  delete_count:15  deleted_byte_count:12552442  replica_placement:100  version:3  modified_at_second:1615485254 
-          volume id:219  size:1092298904  collection:"collection1"  file_count:3193  delete_count:17  deleted_byte_count:2047576  replica_placement:100  version:3  modified_at_second:1615579316 
-          volume id:263  size:1077167352  collection:"collection2"  file_count:20227  delete_count:4  deleted_byte_count:97887  replica_placement:100  version:3  modified_at_second:1614871567 
-          volume id:272  size:1076146040  collection:"collection2"  file_count:21034  delete_count:2  deleted_byte_count:216564  replica_placement:100  version:3  modified_at_second:1614884139 
-          volume id:291  size:1076256760  collection:"collection2"  file_count:28301  delete_count:5  deleted_byte_count:116027  replica_placement:100  version:3  modified_at_second:1614904924 
-          volume id:299  size:1075147824  collection:"collection2"  file_count:22927  delete_count:4  deleted_byte_count:345569  replica_placement:100  version:3  modified_at_second:1614918454 
-          volume id:301  size:1074655600  collection:"collection2"  file_count:22543  delete_count:6  deleted_byte_count:136968  replica_placement:100  version:3  modified_at_second:1614918378 
-          volume id:302  size:1077559792  collection:"collection2"  file_count:23124  delete_count:7  deleted_byte_count:293111  replica_placement:100  version:3  modified_at_second:1614925500 
-          volume id:339  size:1078402392  collection:"collection2"  file_count:22309  replica_placement:100  version:3  modified_at_second:1614969996 
-          volume id:345  size:1074560760  collection:"collection2"  file_count:22117  delete_count:2  deleted_byte_count:373286  replica_placement:100  version:3  modified_at_second:1614977458 
-          volume id:355  size:1075239792  collection:"collection2"  file_count:22244  delete_count:1  deleted_byte_count:23282  replica_placement:100  version:3  modified_at_second:1614992157 
-          volume id:373  size:1080928000  collection:"collection2"  file_count:22617  delete_count:4  deleted_byte_count:91849  replica_placement:100  version:3  modified_at_second:1615016877 
-        Disk hdd total size:48630015544 file_count:537880 deleted_file:2580 deleted_bytes:929560253 
-      DataNode 192.168.1.4:8080 total size:48630015544 file_count:537880 deleted_file:2580 deleted_bytes:929560253 
-    Rack rack1 total size:48630015544 file_count:537880 deleted_file:2580 deleted_bytes:929560253 
-    Rack rack2 hdd(volume:36/190 active:36 free:154 remote:0)
-      DataNode 192.168.1.2:8080 hdd(volume:36/190 active:36 free:154 remote:0)
-        Disk hdd(volume:36/190 active:36 free:154 remote:0)
-          volume id:2  size:289228560  file_count:1640  delete_count:4  deleted_byte_count:480564  replica_placement:100  version:3  compact_revision:6  modified_at_second:1615630622 
-          volume id:3  size:308743136  file_count:1638  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632242 
-          volume id:4  size:285986968  file_count:1641  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632302 
-          volume id:6  size:302411024  file_count:1604  delete_count:2  deleted_byte_count:274587  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631402 
-          volume id:7  size:1924728  collection:"collection4"  file_count:15  replica_placement:100  version:3  modified_at_second:1609331040 
-          volume id:9  size:77337416  collection:"collection3"  file_count:58  replica_placement:100  version:3  ttl:772  modified_at_second:1615513762 
-          volume id:10  size:1212784656  collection:"collection0"  file_count:58  replica_placement:100  version:3  modified_at_second:1609814550 
-          volume id:12  size:1110923848  collection:"collection0"  file_count:45  replica_placement:100  version:3  modified_at_second:1609819732 
-          volume id:13  size:1184910656  collection:"collection0"  file_count:47  replica_placement:100  version:3  modified_at_second:1609827837 
-          volume id:14  size:1107475720  collection:"collection0"  file_count:80  delete_count:3  deleted_byte_count:6870  replica_placement:100  version:3  modified_at_second:1612956980 
-          volume id:16  size:1113666104  collection:"collection0"  file_count:73  delete_count:5  deleted_byte_count:6318  replica_placement:100  version:3  modified_at_second:1612957007 
-          volume id:17  size:1095115800  collection:"collection0"  file_count:83  delete_count:3  deleted_byte_count:7099  replica_placement:100  version:3  modified_at_second:1612957000 
-          volume id:21  size:1097631664  collection:"collection0"  file_count:82  delete_count:11  deleted_byte_count:68985100  replica_placement:100  version:3  modified_at_second:1612957007 
-          volume id:56  size:1001897616  collection:"collection1"  file_count:8762  delete_count:37  deleted_byte_count:65375405  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632014 
-          volume id:81  size:880693104  collection:"collection1"  file_count:7481  delete_count:236  deleted_byte_count:80386421  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631396 
-          volume id:104  size:1076383624  collection:"collection1"  file_count:7663  delete_count:184  deleted_byte_count:100728071  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615602658 
-          volume id:107  size:1073811840  collection:"collection1"  file_count:7436  delete_count:168  deleted_byte_count:57747484  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615293569 
-          volume id:113  size:1076709184  collection:"collection1"  file_count:9355  delete_count:177  deleted_byte_count:59796765  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615569822 
-          volume id:139  size:1074163936  collection:"collection1"  file_count:9315  delete_count:42  deleted_byte_count:10630966  replica_placement:100  version:3  modified_at_second:1615571946 
-          volume id:151  size:1098659752  collection:"collection1"  file_count:10808  delete_count:24  deleted_byte_count:7088102  replica_placement:100  version:3  modified_at_second:1615586389 
-          volume id:155  size:1075140688  collection:"collection1"  file_count:10882  delete_count:32  deleted_byte_count:9076141  replica_placement:100  version:3  modified_at_second:1615606614 
-          volume id:167  size:1073958176  collection:"collection1"  file_count:25229  delete_count:48  deleted_byte_count:25871565  replica_placement:100  version:3  modified_at_second:1615602669 
-          volume id:177  size:1074120216  collection:"collection1"  file_count:22293  delete_count:16  deleted_byte_count:3803952  replica_placement:100  version:3  modified_at_second:1615516892 
-          volume id:179  size:1074313920  collection:"collection1"  file_count:21829  delete_count:24  deleted_byte_count:45552859  replica_placement:100  version:3  modified_at_second:1615580308 
-          volume id:182  size:1076131280  collection:"collection1"  file_count:31987  delete_count:21  deleted_byte_count:1452346  replica_placement:100  version:3  modified_at_second:1615568922 
-          volume id:215  size:1068268216  collection:"collection1"  file_count:2813  delete_count:10  deleted_byte_count:5676795  replica_placement:100  version:3  modified_at_second:1615586386 
-          volume id:217  size:1075381872  collection:"collection1"  file_count:3331  delete_count:14  deleted_byte_count:2009141  replica_placement:100  version:3  modified_at_second:1615401638 
-          volume id:283  size:1080178944  collection:"collection2"  file_count:19462  delete_count:7  deleted_byte_count:660407  replica_placement:100  version:3  modified_at_second:1614896626 
-          volume id:303  size:1075944504  collection:"collection2"  file_count:22541  delete_count:2  deleted_byte_count:13617  replica_placement:100  version:3  modified_at_second:1614925431 
-          volume id:309  size:1075178624  collection:"collection2"  file_count:22692  delete_count:3  deleted_byte_count:171124  replica_placement:100  version:3  modified_at_second:1614931409 
-          volume id:323  size:1074608200  collection:"collection2"  file_count:21605  delete_count:4  deleted_byte_count:172090  replica_placement:100  version:3  modified_at_second:1614950526 
-          volume id:344  size:1075035448  collection:"collection2"  file_count:21765  delete_count:1  deleted_byte_count:24623  replica_placement:100  version:3  modified_at_second:1614977465 
-          volume id:347  size:1075145496  collection:"collection2"  file_count:22178  delete_count:1  deleted_byte_count:79392  replica_placement:100  version:3  modified_at_second:1614984727 
-          volume id:357  size:1074276208  collection:"collection2"  file_count:23137  delete_count:4  deleted_byte_count:188487  replica_placement:100  version:3  modified_at_second:1614998792 
-          volume id:380  size:1010760456  collection:"collection2"  file_count:14921  delete_count:6  deleted_byte_count:65678  replica_placement:100  version:3  modified_at_second:1615632322 
-          volume id:381  size:939292792  collection:"collection2"  file_count:14619  delete_count:2  deleted_byte_count:5119  replica_placement:100  version:3  modified_at_second:1615632324 
-        Disk hdd total size:33468194376 file_count:369168 deleted_file:1091 deleted_bytes:546337088 
-      DataNode 192.168.1.2:8080 total size:33468194376 file_count:369168 deleted_file:1091 deleted_bytes:546337088 
-    Rack rack2 total size:33468194376 file_count:369168 deleted_file:1091 deleted_bytes:546337088 
-  DataCenter dc2 total size:82098209920 file_count:907048 deleted_file:3671 deleted_bytes:1475897341 
-  DataCenter dc3 hdd(volume:108/1850 active:108 free:1742 remote:0)
-    Rack rack3 hdd(volume:108/1850 active:108 free:1742 remote:0)
-      DataNode 192.168.1.6:8080 hdd(volume:108/1850 active:108 free:1742 remote:0)
-        Disk hdd(volume:108/1850 active:108 free:1742 remote:0)
-          volume id:1  size:284685936  file_count:1557  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632062 
-          volume id:32  size:281390512  file_count:1496  delete_count:6  deleted_byte_count:546403  replica_placement:100  version:3  modified_at_second:1615632362 
-          volume id:47  size:444599784  collection:"collection1"  file_count:709  delete_count:19  deleted_byte_count:11913451  replica_placement:100  version:3  modified_at_second:1615632397 
-          volume id:49  size:1078775288  collection:"collection1"  file_count:9636  delete_count:22  deleted_byte_count:5625976  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630446 
-          volume id:68  size:898630584  collection:"collection1"  file_count:6934  delete_count:95  deleted_byte_count:27460707  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632284 
-          volume id:88  size:1073767976  collection:"collection1"  file_count:14995  delete_count:206  deleted_byte_count:81222360  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615629897 
-          volume id:202  size:1077533160  collection:"collection1"  file_count:2847  delete_count:67  deleted_byte_count:65172985  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615588497 
-          volume id:203  size:1027316272  collection:"collection1"  file_count:3040  delete_count:11  deleted_byte_count:3993230  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631728 
-          volume id:205  size:1078485304  collection:"collection1"  file_count:2869  delete_count:43  deleted_byte_count:18290259  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615579314 
-          volume id:206  size:1082045848  collection:"collection1"  file_count:2979  delete_count:225  deleted_byte_count:88220074  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615564274 
-          volume id:209  size:1074083592  collection:"collection1"  file_count:3238  delete_count:4  deleted_byte_count:1494244  replica_placement:100  version:3  modified_at_second:1615419954 
-          volume id:211  size:1080610712  collection:"collection1"  file_count:3247  delete_count:7  deleted_byte_count:1891456  replica_placement:100  version:3  modified_at_second:1615269124 
-          volume id:212  size:1078293360  collection:"collection1"  file_count:3106  delete_count:6  deleted_byte_count:2085755  replica_placement:100  version:3  modified_at_second:1615586387 
-          volume id:213  size:1093587976  collection:"collection1"  file_count:3681  delete_count:12  deleted_byte_count:3138791  replica_placement:100  version:3  modified_at_second:1615586387 
-          volume id:214  size:1074486992  collection:"collection1"  file_count:3217  delete_count:10  deleted_byte_count:6392871  replica_placement:100  version:3  modified_at_second:1615586383 
-          volume id:216  size:1080073496  collection:"collection1"  file_count:3316  delete_count:4  deleted_byte_count:179819  replica_placement:100  version:3  modified_at_second:1615586387 
-          volume id:222  size:1106623104  collection:"collection1"  file_count:3273  delete_count:11  deleted_byte_count:2114627  replica_placement:100  version:3  modified_at_second:1615586243 
-          volume id:223  size:1075233064  collection:"collection1"  file_count:2966  delete_count:9  deleted_byte_count:744001  replica_placement:100  version:3  modified_at_second:1615586244 
-          volume id:227  size:1106699896  collection:"collection1"  file_count:2827  delete_count:20  deleted_byte_count:5496790  replica_placement:100  version:3  modified_at_second:1615609989 
-          volume id:229  size:1109855312  collection:"collection1"  file_count:2857  delete_count:22  deleted_byte_count:2839883  replica_placement:100  version:3  modified_at_second:1615609988 
-          volume id:230  size:1080722984  collection:"collection1"  file_count:2898  delete_count:15  deleted_byte_count:3929261  replica_placement:100  version:3  modified_at_second:1615610537 
-          volume id:231  size:1112917696  collection:"collection1"  file_count:3151  delete_count:20  deleted_byte_count:2989828  replica_placement:100  version:3  modified_at_second:1615611350 
-          volume id:233  size:1080526464  collection:"collection1"  file_count:3136  delete_count:61  deleted_byte_count:17991717  replica_placement:100  version:3  modified_at_second:1615611352 
-          volume id:234  size:1073835280  collection:"collection1"  file_count:2965  delete_count:41  deleted_byte_count:4960354  replica_placement:100  version:3  modified_at_second:1615611351 
-          volume id:235  size:1075586104  collection:"collection1"  file_count:2767  delete_count:33  deleted_byte_count:3216540  replica_placement:100  version:3  modified_at_second:1615611354 
-          volume id:237  size:375722792  collection:"collection1"  file_count:736  delete_count:16  deleted_byte_count:4464870  replica_placement:100  version:3  modified_at_second:1615631727 
-          volume id:239  size:426569024  collection:"collection1"  file_count:693  delete_count:19  deleted_byte_count:13020783  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630838 
-          volume id:241  size:380217424  collection:"collection1"  file_count:633  delete_count:6  deleted_byte_count:1715768  replica_placement:100  version:3  modified_at_second:1615632006 
-          volume id:244  size:1080295352  collection:"collection2"  file_count:10812  delete_count:1  deleted_byte_count:795  replica_placement:100  version:3  modified_at_second:1614852171 
-          volume id:245  size:1074597056  collection:"collection2"  file_count:10371  delete_count:3  deleted_byte_count:209701  replica_placement:100  version:3  modified_at_second:1614852093 
-          volume id:246  size:1075998648  collection:"collection2"  file_count:10365  delete_count:1  deleted_byte_count:13112  replica_placement:100  version:3  modified_at_second:1614852105 
-          volume id:248  size:1084301184  collection:"collection2"  file_count:11217  delete_count:4  deleted_byte_count:746488  replica_placement:100  version:3  modified_at_second:1614856285 
-          volume id:249  size:1074819136  collection:"collection2"  file_count:10763  delete_count:2  deleted_byte_count:271699  replica_placement:100  version:3  modified_at_second:1614856230 
-          volume id:251  size:1075684488  collection:"collection2"  file_count:10847  replica_placement:100  version:3  modified_at_second:1614856270 
-          volume id:252  size:1075065208  collection:"collection2"  file_count:14622  delete_count:2  deleted_byte_count:5228  replica_placement:100  version:3  modified_at_second:1614861196 
-          volume id:253  size:1087328816  collection:"collection2"  file_count:14920  delete_count:3  deleted_byte_count:522994  replica_placement:100  version:3  modified_at_second:1614861255 
-          volume id:255  size:1079581640  collection:"collection2"  file_count:14877  delete_count:3  deleted_byte_count:101223  replica_placement:100  version:3  modified_at_second:1614861233 
-          volume id:256  size:1074283592  collection:"collection2"  file_count:14157  delete_count:1  deleted_byte_count:18156  replica_placement:100  version:3  modified_at_second:1614861100 
-          volume id:258  size:1075527216  collection:"collection2"  file_count:18421  delete_count:4  deleted_byte_count:267833  replica_placement:100  version:3  modified_at_second:1614866420 
-          volume id:259  size:1075507776  collection:"collection2"  file_count:18079  delete_count:2  deleted_byte_count:71992  replica_placement:100  version:3  modified_at_second:1614866381 
-          volume id:264  size:1081624192  collection:"collection2"  file_count:21151  replica_placement:100  version:3  modified_at_second:1614871629 
-          volume id:265  size:1076401104  collection:"collection2"  file_count:19932  delete_count:2  deleted_byte_count:160823  replica_placement:100  version:3  modified_at_second:1615629130 
-          volume id:266  size:1075617464  collection:"collection2"  file_count:20075  delete_count:1  deleted_byte_count:1039  replica_placement:100  version:3  modified_at_second:1614871526 
-          volume id:267  size:1075699544  collection:"collection2"  file_count:21039  delete_count:3  deleted_byte_count:59956  replica_placement:100  version:3  modified_at_second:1614877294 
-          volume id:268  size:1074490592  collection:"collection2"  file_count:21698  delete_count:1  deleted_byte_count:33968  replica_placement:100  version:3  modified_at_second:1614877434 
-          volume id:269  size:1077552872  collection:"collection2"  file_count:21875  delete_count:4  deleted_byte_count:347272  replica_placement:100  version:3  modified_at_second:1614877481 
-          volume id:270  size:1076876568  collection:"collection2"  file_count:22057  delete_count:1  deleted_byte_count:43916  replica_placement:100  version:3  modified_at_second:1614877469 
-          volume id:275  size:1078349024  collection:"collection2"  file_count:20808  delete_count:1  deleted_byte_count:1118  replica_placement:100  version:3  modified_at_second:1614884147 
-          volume id:277  size:1074956288  collection:"collection2"  file_count:19260  delete_count:2  deleted_byte_count:172356  replica_placement:100  version:3  modified_at_second:1614889988 
-          volume id:278  size:1078798640  collection:"collection2"  file_count:20597  delete_count:5  deleted_byte_count:400060  replica_placement:100  version:3  modified_at_second:1614890292 
-          volume id:279  size:1077325040  collection:"collection2"  file_count:19671  delete_count:6  deleted_byte_count:379116  replica_placement:100  version:3  modified_at_second:1614890229 
-          volume id:280  size:1077432216  collection:"collection2"  file_count:20286  delete_count:1  deleted_byte_count:879  replica_placement:100  version:3  modified_at_second:1614890262 
-          volume id:281  size:1077581096  collection:"collection2"  file_count:20206  delete_count:3  deleted_byte_count:143964  replica_placement:100  version:3  modified_at_second:1614890237 
-          volume id:284  size:1074533384  collection:"collection2"  file_count:22196  delete_count:4  deleted_byte_count:154683  replica_placement:100  version:3  modified_at_second:1614897231 
-          volume id:285  size:1082128688  collection:"collection2"  file_count:21804  delete_count:1  deleted_byte_count:1064  replica_placement:100  version:3  modified_at_second:1614897165 
-          volume id:289  size:1075284256  collection:"collection2"  file_count:29342  delete_count:5  deleted_byte_count:100454  replica_placement:100  version:3  modified_at_second:1614904977 
-          volume id:290  size:1074723792  collection:"collection2"  file_count:28340  delete_count:4  deleted_byte_count:199064  replica_placement:100  version:3  modified_at_second:1614904924 
-          volume id:291  size:1076256768  collection:"collection2"  file_count:28301  delete_count:5  deleted_byte_count:116027  replica_placement:100  version:3  modified_at_second:1614904924 
-          volume id:293  size:1075409792  collection:"collection2"  file_count:26063  delete_count:4  deleted_byte_count:183834  replica_placement:100  version:3  modified_at_second:1614912235 
-          volume id:294  size:1075444048  collection:"collection2"  file_count:26076  delete_count:4  deleted_byte_count:194914  replica_placement:100  version:3  modified_at_second:1614912220 
-          volume id:296  size:1077824032  collection:"collection2"  file_count:26741  delete_count:4  deleted_byte_count:199906  replica_placement:100  version:3  modified_at_second:1614912301 
-          volume id:297  size:1080229136  collection:"collection2"  file_count:23409  delete_count:5  deleted_byte_count:46268  replica_placement:100  version:3  modified_at_second:1614918481 
-          volume id:298  size:1075410136  collection:"collection2"  file_count:23222  delete_count:2  deleted_byte_count:46110  replica_placement:100  version:3  modified_at_second:1614918474 
-          volume id:299  size:1075147936  collection:"collection2"  file_count:22927  delete_count:4  deleted_byte_count:345569  replica_placement:100  version:3  modified_at_second:1614918455 
-          volume id:300  size:1076212392  collection:"collection2"  file_count:22892  delete_count:2  deleted_byte_count:61320  replica_placement:100  version:3  modified_at_second:1614918464 
-          volume id:301  size:1074655600  collection:"collection2"  file_count:22543  delete_count:6  deleted_byte_count:136968  replica_placement:100  version:3  modified_at_second:1614918378 
-          volume id:303  size:1075944480  collection:"collection2"  file_count:22541  delete_count:2  deleted_byte_count:13617  replica_placement:100  version:3  modified_at_second:1614925431 
-          volume id:306  size:1074764016  collection:"collection2"  file_count:22939  replica_placement:100  version:3  modified_at_second:1614925462 
-          volume id:307  size:1076568000  collection:"collection2"  file_count:23377  delete_count:2  deleted_byte_count:25453  replica_placement:100  version:3  modified_at_second:1614931448 
-          volume id:308  size:1074022392  collection:"collection2"  file_count:23086  delete_count:2  deleted_byte_count:2127  replica_placement:100  version:3  modified_at_second:1614931401 
-          volume id:309  size:1075178664  collection:"collection2"  file_count:22692  delete_count:3  deleted_byte_count:171124  replica_placement:100  version:3  modified_at_second:1614931409 
-          volume id:310  size:1074761528  collection:"collection2"  file_count:21441  delete_count:3  deleted_byte_count:13934  replica_placement:100  version:3  modified_at_second:1614931077 
-          volume id:314  size:1074670840  collection:"collection2"  file_count:20964  delete_count:4  deleted_byte_count:304291  replica_placement:100  version:3  modified_at_second:1614937441 
-          volume id:315  size:1084153544  collection:"collection2"  file_count:23638  delete_count:2  deleted_byte_count:53956  replica_placement:100  version:3  modified_at_second:1614937885 
-          volume id:317  size:1076215096  collection:"collection2"  file_count:23572  delete_count:2  deleted_byte_count:1441356  replica_placement:100  version:3  modified_at_second:1614943965 
-          volume id:318  size:1075965168  collection:"collection2"  file_count:22459  delete_count:2  deleted_byte_count:37778  replica_placement:100  version:3  modified_at_second:1614943862 
-          volume id:319  size:1073952880  collection:"collection2"  file_count:22286  delete_count:2  deleted_byte_count:43421  replica_placement:100  version:3  modified_at_second:1614943810 
-          volume id:320  size:1082437792  collection:"collection2"  file_count:21544  delete_count:3  deleted_byte_count:16712  replica_placement:100  version:3  modified_at_second:1614943599 
-          volume id:321  size:1081477904  collection:"collection2"  file_count:23531  delete_count:5  deleted_byte_count:262564  replica_placement:100  version:3  modified_at_second:1614943982 
-          volume id:324  size:1075606680  collection:"collection2"  file_count:20799  delete_count:1  deleted_byte_count:251210  replica_placement:100  version:3  modified_at_second:1614950310 
-          volume id:325  size:1080701144  collection:"collection2"  file_count:21735  replica_placement:100  version:3  modified_at_second:1614950525 
-          volume id:330  size:1080825832  collection:"collection2"  file_count:22464  delete_count:2  deleted_byte_count:15771  replica_placement:100  version:3  modified_at_second:1614956477 
-          volume id:332  size:1075569928  collection:"collection2"  file_count:22097  delete_count:3  deleted_byte_count:98273  replica_placement:100  version:3  modified_at_second:1614962869 
-          volume id:334  size:1075607880  collection:"collection2"  file_count:22546  delete_count:6  deleted_byte_count:101538  replica_placement:100  version:3  modified_at_second:1614962978 
-          volume id:336  size:1087853056  collection:"collection2"  file_count:22801  delete_count:2  deleted_byte_count:26394  replica_placement:100  version:3  modified_at_second:1614963005 
-          volume id:337  size:1075646784  collection:"collection2"  file_count:21934  delete_count:1  deleted_byte_count:3397  replica_placement:100  version:3  modified_at_second:1614969937 
-          volume id:338  size:1076118304  collection:"collection2"  file_count:21680  replica_placement:100  version:3  modified_at_second:1614969850 
-          volume id:340  size:1079462184  collection:"collection2"  file_count:22319  delete_count:4  deleted_byte_count:93620  replica_placement:100  version:3  modified_at_second:1614969978 
-          volume id:341  size:1074448400  collection:"collection2"  file_count:21590  delete_count:5  deleted_byte_count:160085  replica_placement:100  version:3  modified_at_second:1614969858 
-          volume id:342  size:1080186424  collection:"collection2"  file_count:22405  delete_count:4  deleted_byte_count:64819  replica_placement:100  version:3  modified_at_second:1614977521 
-          volume id:344  size:1075035416  collection:"collection2"  file_count:21765  delete_count:1  deleted_byte_count:24623  replica_placement:100  version:3  modified_at_second:1614977465 
-          volume id:345  size:1074560760  collection:"collection2"  file_count:22117  delete_count:2  deleted_byte_count:373286  replica_placement:100  version:3  modified_at_second:1614977457 
-          volume id:346  size:1076464112  collection:"collection2"  file_count:22320  delete_count:4  deleted_byte_count:798258  replica_placement:100  version:3  modified_at_second:1615631322 
-          volume id:348  size:1080623640  collection:"collection2"  file_count:21667  delete_count:1  deleted_byte_count:2443  replica_placement:100  version:3  modified_at_second:1614984606 
-          volume id:350  size:1074756688  collection:"collection2"  file_count:21990  delete_count:3  deleted_byte_count:233881  replica_placement:100  version:3  modified_at_second:1614984682 
-          volume id:351  size:1078795112  collection:"collection2"  file_count:23660  delete_count:3  deleted_byte_count:102141  replica_placement:100  version:3  modified_at_second:1614984816 
-          volume id:352  size:1077145936  collection:"collection2"  file_count:22066  delete_count:1  deleted_byte_count:1018  replica_placement:100  version:3  modified_at_second:1614992130 
-          volume id:353  size:1074897496  collection:"collection2"  file_count:21266  delete_count:2  deleted_byte_count:3105374  replica_placement:100  version:3  modified_at_second:1614991951 
-          volume id:355  size:1075239728  collection:"collection2"  file_count:22244  delete_count:1  deleted_byte_count:23282  replica_placement:100  version:3  modified_at_second:1614992157 
-          volume id:356  size:1083305048  collection:"collection2"  file_count:21552  delete_count:4  deleted_byte_count:14472  replica_placement:100  version:3  modified_at_second:1614992028 
-          volume id:358  size:1085152368  collection:"collection2"  file_count:23756  delete_count:3  deleted_byte_count:44531  replica_placement:100  version:3  modified_at_second:1614998824 
-          volume id:360  size:1075532456  collection:"collection2"  file_count:22574  delete_count:3  deleted_byte_count:1774776  replica_placement:100  version:3  modified_at_second:1614998770 
-          volume id:361  size:1075362744  collection:"collection2"  file_count:22272  delete_count:1  deleted_byte_count:3497  replica_placement:100  version:3  modified_at_second:1614998668 
-          volume id:375  size:1076140568  collection:"collection2"  file_count:21880  delete_count:2  deleted_byte_count:51103  replica_placement:100  version:3  modified_at_second:1615016787 
-          volume id:376  size:1074845944  collection:"collection2"  file_count:22908  delete_count:4  deleted_byte_count:432305  replica_placement:100  version:3  modified_at_second:1615016916 
-          volume id:377  size:957284144  collection:"collection2"  file_count:14923  delete_count:1  deleted_byte_count:1797  replica_placement:100  version:3  modified_at_second:1615632323 
-          volume id:378  size:959273936  collection:"collection2"  file_count:15027  delete_count:4  deleted_byte_count:231414  replica_placement:100  version:3  modified_at_second:1615632323 
-          volume id:381  size:939261032  collection:"collection2"  file_count:14615  delete_count:5  deleted_byte_count:1192272  replica_placement:100  version:3  modified_at_second:1615632324 
-        Disk hdd total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585 
-      DataNode 192.168.1.6:8080 total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585 
-    Rack rack3 total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585 
-  DataCenter dc3 total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585 
-  DataCenter dc4 hdd(volume:267/2000 active:267 free:1733 remote:0)
-    Rack DefaultRack hdd(volume:267/2000 active:267 free:1733 remote:0)
-      DataNode 192.168.1.1:8080 hdd(volume:267/2000 active:267 free:1733 remote:0)
-        Disk hdd(volume:267/2000 active:267 free:1733 remote:0)
-          volume id:1  size:284693256  file_count:1558  delete_count:2  deleted_byte_count:4818  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632062 
-          volume id:2  size:289228560  file_count:1640  delete_count:4  deleted_byte_count:464508  replica_placement:100  version:3  compact_revision:6  modified_at_second:1615630622 
-          volume id:3  size:308741952  file_count:1637  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632242 
-          volume id:4  size:285986968  file_count:1640  delete_count:1  deleted_byte_count:145095  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632302 
-          volume id:5  size:293806008  file_count:1669  delete_count:2  deleted_byte_count:274334  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631342 
-          volume id:6  size:302411024  file_count:1604  delete_count:2  deleted_byte_count:274587  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631402 
-          volume id:7  size:1924728  collection:"collection4"  file_count:15  replica_placement:100  version:3  modified_at_second:1609331040 
-          volume id:9  size:77337416  collection:"collection3"  file_count:58  replica_placement:100  version:3  ttl:772  modified_at_second:1615513762 
-          volume id:10  size:1212784656  collection:"collection0"  file_count:58  replica_placement:100  version:3  modified_at_second:1609814543 
-          volume id:11  size:1109224552  collection:"collection0"  file_count:44  replica_placement:100  version:3  modified_at_second:1609815123 
-          volume id:12  size:1110923848  collection:"collection0"  file_count:45  replica_placement:100  version:3  modified_at_second:1609819726 
-          volume id:13  size:1184910656  collection:"collection0"  file_count:47  replica_placement:100  version:3  modified_at_second:1609827832 
-          volume id:14  size:1107475720  collection:"collection0"  file_count:80  delete_count:3  deleted_byte_count:6870  replica_placement:100  version:3  modified_at_second:1612956983 
-          volume id:15  size:1115965160  collection:"collection0"  file_count:83  delete_count:3  deleted_byte_count:4956  replica_placement:100  version:3  modified_at_second:1612957001 
-          volume id:16  size:1113666048  collection:"collection0"  file_count:73  delete_count:5  deleted_byte_count:6318  replica_placement:100  version:3  modified_at_second:1612957007 
-          volume id:17  size:1095115800  collection:"collection0"  file_count:83  delete_count:3  deleted_byte_count:7099  replica_placement:100  version:3  modified_at_second:1612957000 
-          volume id:18  size:1096678688  collection:"collection0"  file_count:88  delete_count:4  deleted_byte_count:8633  replica_placement:100  version:3  modified_at_second:1612957000 
-          volume id:19  size:1096923792  collection:"collection0"  file_count:100  delete_count:10  deleted_byte_count:75779917  replica_placement:100  version:3  compact_revision:4  modified_at_second:1612957011 
-          volume id:20  size:1074760432  collection:"collection0"  file_count:82  delete_count:5  deleted_byte_count:12156  replica_placement:100  version:3  compact_revision:2  modified_at_second:1612957011 
-          volume id:22  size:1086828368  collection:"collection0"  file_count:75  delete_count:3  deleted_byte_count:5551  replica_placement:100  version:3  modified_at_second:1612957007 
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-          volume id:354  size:1085213992  collection:"collection2"  file_count:23150  delete_count:4  deleted_byte_count:82391  replica_placement:100  version:3  modified_at_second:1614992207 
-          volume id:356  size:1083304992  collection:"collection2"  file_count:21552  delete_count:4  deleted_byte_count:14472  replica_placement:100  version:3  modified_at_second:1614992027 
-          volume id:358  size:1085152312  collection:"collection2"  file_count:23756  delete_count:3  deleted_byte_count:44531  replica_placement:100  version:3  modified_at_second:1614998824 
-          volume id:359  size:1074211240  collection:"collection2"  file_count:22437  delete_count:2  deleted_byte_count:187953  replica_placement:100  version:3  modified_at_second:1614998711 
-          volume id:362  size:1074074120  collection:"collection2"  file_count:20595  delete_count:1  deleted_byte_count:112145  replica_placement:100  version:3  modified_at_second:1615004407 
-          volume id:363  size:1078859496  collection:"collection2"  file_count:23177  delete_count:4  deleted_byte_count:9601  replica_placement:100  version:3  modified_at_second:1615004822 
-          volume id:364  size:1081280816  collection:"collection2"  file_count:22686  delete_count:1  deleted_byte_count:84375  replica_placement:100  version:3  modified_at_second:1615004813 
-          volume id:365  size:1075736632  collection:"collection2"  file_count:22193  delete_count:5  deleted_byte_count:259033  replica_placement:100  version:3  modified_at_second:1615004776 
-          volume id:366  size:1075267272  collection:"collection2"  file_count:21856  delete_count:5  deleted_byte_count:138363  replica_placement:100  version:3  modified_at_second:1615004703 
-          volume id:367  size:1076403648  collection:"collection2"  file_count:22995  delete_count:2  deleted_byte_count:36955  replica_placement:100  version:3  modified_at_second:1615010985 
-          volume id:368  size:1074822016  collection:"collection2"  file_count:22252  delete_count:4  deleted_byte_count:3291946  replica_placement:100  version:3  modified_at_second:1615010878 
-          volume id:369  size:1091472040  collection:"collection2"  file_count:23709  delete_count:4  deleted_byte_count:400876  replica_placement:100  version:3  modified_at_second:1615011019 
-          volume id:370  size:1076040480  collection:"collection2"  file_count:22092  delete_count:2  deleted_byte_count:115388  replica_placement:100  version:3  modified_at_second:1615010877 
-          volume id:371  size:1078806160  collection:"collection2"  file_count:22685  delete_count:2  deleted_byte_count:68905  replica_placement:100  version:3  modified_at_second:1615010994 
-          volume id:372  size:1076193312  collection:"collection2"  file_count:22774  delete_count:1  deleted_byte_count:3495  replica_placement:100  version:3  modified_at_second:1615016911 
-          volume id:374  size:1085011080  collection:"collection2"  file_count:23054  delete_count:2  deleted_byte_count:89034  replica_placement:100  version:3  modified_at_second:1615016917 
-          volume id:375  size:1076140688  collection:"collection2"  file_count:21880  delete_count:2  deleted_byte_count:51103  replica_placement:100  version:3  modified_at_second:1615016787 
-          volume id:378  size:959273824  collection:"collection2"  file_count:15031  replica_placement:100  version:3  modified_at_second:1615632323 
-          volume id:379  size:1014108592  collection:"collection2"  file_count:15360  delete_count:8  deleted_byte_count:2524591  replica_placement:100  version:3  modified_at_second:1615632323 
-          volume id:380  size:1010760464  collection:"collection2"  file_count:14920  delete_count:7  deleted_byte_count:134859  replica_placement:100  version:3  modified_at_second:1615632322 
-        Disk hdd total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457 
-      DataNode 192.168.1.1:8080 total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457 
-    Rack DefaultRack total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457 
-  DataCenter dc4 total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457 
-  DataCenter dc5 hdd(volume:299/3000 active:299 free:2701 remote:0)
-    Rack DefaultRack hdd(volume:299/3000 active:299 free:2701 remote:0)
-      DataNode 192.168.1.5:8080 hdd(volume:299/3000 active:299 free:2701 remote:0)
-        Disk hdd(volume:299/3000 active:299 free:2701 remote:0)
-          volume id:5  size:293806008  file_count:1669  delete_count:2  deleted_byte_count:274334  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631342 
-          volume id:11  size:1109224552  collection:"collection0"  file_count:44  replica_placement:100  version:3  modified_at_second:1615629606 
-          volume id:18  size:1096678688  collection:"collection0"  file_count:88  delete_count:4  deleted_byte_count:8633  replica_placement:100  version:3  modified_at_second:1615631673 
-          volume id:19  size:1096923792  collection:"collection0"  file_count:100  delete_count:10  deleted_byte_count:75779917  replica_placement:100  version:3  compact_revision:4  modified_at_second:1615630117 
-          volume id:20  size:1074760432  collection:"collection0"  file_count:82  delete_count:5  deleted_byte_count:12156  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615629340 
-          volume id:26  size:532657632  collection:"collection0"  file_count:100  delete_count:4  deleted_byte_count:9081  replica_placement:100  version:3  modified_at_second:1614170024 
-          volume id:27  size:298886792  file_count:1608  replica_placement:100  version:3  modified_at_second:1615632482 
-          volume id:28  size:308919192  file_count:1591  delete_count:1  deleted_byte_count:125280  replica_placement:100  version:3  modified_at_second:1615631762 
-          volume id:29  size:281582688  file_count:1537  replica_placement:100  version:3  modified_at_second:1615629422 
-          volume id:30  size:289466144  file_count:1566  delete_count:1  deleted_byte_count:124972  replica_placement:100  version:3  modified_at_second:1615632422 
-          volume id:31  size:273363256  file_count:1498  replica_placement:100  version:3  modified_at_second:1615631642 
-          volume id:32  size:281343360  file_count:1497  replica_placement:100  version:3  modified_at_second:1615632362 
-          volume id:33  size:1130226344  collection:"collection1"  file_count:7322  delete_count:172  deleted_byte_count:45199399  replica_placement:100  version:3  modified_at_second:1615618789 
-          volume id:34  size:1077111136  collection:"collection1"  file_count:9781  delete_count:110  deleted_byte_count:20894827  replica_placement:100  version:3  modified_at_second:1615619366 
-          volume id:35  size:1075241744  collection:"collection1"  file_count:10523  delete_count:97  deleted_byte_count:46586217  replica_placement:100  version:3  modified_at_second:1615618790 
-          volume id:36  size:1075118336  collection:"collection1"  file_count:10341  delete_count:118  deleted_byte_count:24753278  replica_placement:100  version:3  modified_at_second:1615606148 
-          volume id:37  size:1075895576  collection:"collection1"  file_count:12013  delete_count:98  deleted_byte_count:50747932  replica_placement:100  version:3  modified_at_second:1615594776 
-          volume id:38  size:1075545744  collection:"collection1"  file_count:13324  delete_count:100  deleted_byte_count:25223906  replica_placement:100  version:3  modified_at_second:1615569830 
-          volume id:39  size:1076606536  collection:"collection1"  file_count:12612  delete_count:78  deleted_byte_count:17462730  replica_placement:100  version:3  modified_at_second:1615611959 
-          volume id:40  size:1075358552  collection:"collection1"  file_count:12597  delete_count:62  deleted_byte_count:11657901  replica_placement:100  version:3  modified_at_second:1615612994 
-          volume id:41  size:1076283592  collection:"collection1"  file_count:12088  delete_count:84  deleted_byte_count:19311237  replica_placement:100  version:3  modified_at_second:1615596736 
-          volume id:42  size:1093948352  collection:"collection1"  file_count:7889  delete_count:47  deleted_byte_count:5697275  replica_placement:100  version:3  modified_at_second:1615548906 
-          volume id:43  size:1116445864  collection:"collection1"  file_count:7355  delete_count:57  deleted_byte_count:9727158  replica_placement:100  version:3  modified_at_second:1615566167 
-          volume id:44  size:1077582560  collection:"collection1"  file_count:7295  delete_count:50  deleted_byte_count:12618414  replica_placement:100  version:3  modified_at_second:1615566170 
-          volume id:45  size:1075254640  collection:"collection1"  file_count:10772  delete_count:76  deleted_byte_count:22426345  replica_placement:100  version:3  modified_at_second:1615573498 
-          volume id:46  size:1075286056  collection:"collection1"  file_count:9947  delete_count:309  deleted_byte_count:105601163  replica_placement:100  version:3  modified_at_second:1615569825 
-          volume id:47  size:444599784  collection:"collection1"  file_count:709  delete_count:19  deleted_byte_count:11913451  replica_placement:100  version:3  modified_at_second:1615632397 
-          volume id:48  size:1076778664  collection:"collection1"  file_count:9850  delete_count:77  deleted_byte_count:16641907  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630690 
-          volume id:49  size:1078775288  collection:"collection1"  file_count:9631  delete_count:27  deleted_byte_count:5985628  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615575823 
-          volume id:50  size:1076688288  collection:"collection1"  file_count:7921  delete_count:26  deleted_byte_count:5162032  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615610876 
-          volume id:51  size:1076796120  collection:"collection1"  file_count:10550  delete_count:39  deleted_byte_count:12723654  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615547786 
-          volume id:53  size:1063089216  collection:"collection1"  file_count:9832  delete_count:31  deleted_byte_count:9273066  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632156 
-          volume id:54  size:1045022288  collection:"collection1"  file_count:9409  delete_count:29  deleted_byte_count:15102818  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630813 
-          volume id:55  size:1012890016  collection:"collection1"  file_count:8651  delete_count:27  deleted_byte_count:9418841  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631453 
-          volume id:56  size:1002412240  collection:"collection1"  file_count:8762  delete_count:40  deleted_byte_count:65885831  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632014 
-          volume id:57  size:839849792  collection:"collection1"  file_count:7514  delete_count:24  deleted_byte_count:6228543  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631775 
-          volume id:58  size:908064192  collection:"collection1"  file_count:8128  delete_count:21  deleted_byte_count:6113731  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632343 
-          volume id:59  size:988302272  collection:"collection1"  file_count:8098  delete_count:20  deleted_byte_count:3947615  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632238 
-          volume id:60  size:1010702480  collection:"collection1"  file_count:8969  delete_count:79  deleted_byte_count:24782814  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632439 
-          volume id:61  size:975604544  collection:"collection1"  file_count:8683  delete_count:20  deleted_byte_count:10276072  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615631176 
-          volume id:62  size:873845904  collection:"collection1"  file_count:7897  delete_count:23  deleted_byte_count:10920170  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631133 
-          volume id:63  size:956941176  collection:"collection1"  file_count:8271  delete_count:32  deleted_byte_count:15876189  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632036 
-          volume id:64  size:965638424  collection:"collection1"  file_count:8218  delete_count:27  deleted_byte_count:6922489  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631032 
-          volume id:65  size:823283608  collection:"collection1"  file_count:7834  delete_count:29  deleted_byte_count:5950610  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632307 
-          volume id:66  size:821343440  collection:"collection1"  file_count:7383  delete_count:29  deleted_byte_count:12010343  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631968 
-          volume id:67  size:878713880  collection:"collection1"  file_count:7299  delete_count:117  deleted_byte_count:24857326  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632156 
-          volume id:69  size:863913896  collection:"collection1"  file_count:7291  delete_count:100  deleted_byte_count:25335024  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630534 
-          volume id:70  size:886695472  collection:"collection1"  file_count:7769  delete_count:164  deleted_byte_count:45162513  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632398 
-          volume id:71  size:907608392  collection:"collection1"  file_count:7658  delete_count:122  deleted_byte_count:27622941  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632307 
-          volume id:72  size:903990720  collection:"collection1"  file_count:6996  delete_count:240  deleted_byte_count:74147727  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630985 
-          volume id:73  size:929047544  collection:"collection1"  file_count:7038  delete_count:227  deleted_byte_count:65336664  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630707 
-          volume id:75  size:908045000  collection:"collection1"  file_count:6911  delete_count:268  deleted_byte_count:73934373  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632430 
-          volume id:76  size:985296744  collection:"collection1"  file_count:6566  delete_count:61  deleted_byte_count:44464430  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632284 
-          volume id:77  size:929398296  collection:"collection1"  file_count:7427  delete_count:238  deleted_byte_count:59581579  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632014 
-          volume id:78  size:1075671512  collection:"collection1"  file_count:7540  delete_count:258  deleted_byte_count:71726846  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615582829 
-          volume id:79  size:948225472  collection:"collection1"  file_count:6997  delete_count:227  deleted_byte_count:60625763  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631326 
-          volume id:80  size:827912928  collection:"collection1"  file_count:6916  delete_count:15  deleted_byte_count:5611604  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631159 
-          volume id:81  size:880693168  collection:"collection1"  file_count:7481  delete_count:238  deleted_byte_count:80880878  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631395 
-          volume id:82  size:1041660512  collection:"collection1"  file_count:7043  delete_count:207  deleted_byte_count:52275724  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632430 
-          volume id:83  size:936194288  collection:"collection1"  file_count:7593  delete_count:13  deleted_byte_count:4633917  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632029 
-          volume id:84  size:871262320  collection:"collection1"  file_count:8190  delete_count:14  deleted_byte_count:3150948  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631161 
-          volume id:86  size:1009434632  collection:"collection1"  file_count:8474  delete_count:236  deleted_byte_count:64543674  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630812 
-          volume id:87  size:922274624  collection:"collection1"  file_count:12902  delete_count:13  deleted_byte_count:3412959  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632438 
-          volume id:88  size:1073767976  collection:"collection1"  file_count:14994  delete_count:207  deleted_byte_count:82380696  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615541383 
-          volume id:89  size:1044421824  collection:"collection1"  file_count:14943  delete_count:243  deleted_byte_count:58543159  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632208 
-          volume id:90  size:891163760  collection:"collection1"  file_count:14608  delete_count:10  deleted_byte_count:2564369  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615629392 
-          volume id:91  size:936573952  collection:"collection1"  file_count:14686  delete_count:11  deleted_byte_count:4717727  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631851 
-          volume id:92  size:992439144  collection:"collection1"  file_count:7061  delete_count:195  deleted_byte_count:60649573  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630566 
-          volume id:93  size:1079602592  collection:"collection1"  file_count:7878  delete_count:270  deleted_byte_count:74150048  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615556013 
-          volume id:94  size:1030684704  collection:"collection1"  file_count:7660  delete_count:207  deleted_byte_count:70150733  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631616 
-          volume id:95  size:990877824  collection:"collection1"  file_count:6620  delete_count:206  deleted_byte_count:60363604  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615631867 
-          volume id:96  size:989294848  collection:"collection1"  file_count:7544  delete_count:229  deleted_byte_count:59931853  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630778 
-          volume id:98  size:1077836472  collection:"collection1"  file_count:7605  delete_count:202  deleted_byte_count:73180379  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615523691 
-          volume id:99  size:1071718496  collection:"collection1"  file_count:7470  delete_count:8  deleted_byte_count:9624950  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631175 
-          volume id:100  size:1083617472  collection:"collection1"  file_count:7018  delete_count:187  deleted_byte_count:61304236  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615505914 
-          volume id:101  size:1077109408  collection:"collection1"  file_count:7706  delete_count:226  deleted_byte_count:77864780  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630994 
-          volume id:102  size:1074359920  collection:"collection1"  file_count:7338  delete_count:7  deleted_byte_count:6499151  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615626682 
-          volume id:103  size:1075863904  collection:"collection1"  file_count:7184  delete_count:186  deleted_byte_count:58872238  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615628417 
-          volume id:106  size:1075458680  collection:"collection1"  file_count:7182  delete_count:307  deleted_byte_count:69349053  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615598137 
-          volume id:107  size:1073811776  collection:"collection1"  file_count:7436  delete_count:168  deleted_byte_count:57747428  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615293569 
-          volume id:108  size:1074648024  collection:"collection1"  file_count:7472  delete_count:194  deleted_byte_count:70864699  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615593231 
-          volume id:109  size:1075254560  collection:"collection1"  file_count:7556  delete_count:263  deleted_byte_count:55155265  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615502487 
-          volume id:110  size:1076575744  collection:"collection1"  file_count:6996  delete_count:163  deleted_byte_count:52954032  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615590786 
-          volume id:111  size:1073826176  collection:"collection1"  file_count:7355  delete_count:155  deleted_byte_count:50083578  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615593232 
-          volume id:112  size:1076392512  collection:"collection1"  file_count:8291  delete_count:156  deleted_byte_count:74120183  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615569823 
-          volume id:113  size:1076709184  collection:"collection1"  file_count:9355  delete_count:177  deleted_byte_count:59796765  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615569822 
-          volume id:114  size:1074762792  collection:"collection1"  file_count:8802  delete_count:156  deleted_byte_count:38470055  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615591826 
-          volume id:115  size:1076192296  collection:"collection1"  file_count:7690  delete_count:154  deleted_byte_count:32267193  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615285296 
-          volume id:117  size:1073917192  collection:"collection1"  file_count:9520  delete_count:114  deleted_byte_count:21835126  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615573712 
-          volume id:118  size:1074064344  collection:"collection1"  file_count:8738  delete_count:15  deleted_byte_count:3460697  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615516264 
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-          volume id:250  size:1080572168  collection:"collection2"  file_count:10220  replica_placement:100  version:3  modified_at_second:1614856129 
-          volume id:252  size:1075065264  collection:"collection2"  file_count:14622  delete_count:2  deleted_byte_count:5228  replica_placement:100  version:3  modified_at_second:1614861200 
-          volume id:253  size:1087328880  collection:"collection2"  file_count:14920  delete_count:3  deleted_byte_count:522994  replica_placement:100  version:3  modified_at_second:1614861258 
-          volume id:254  size:1074830736  collection:"collection2"  file_count:14140  delete_count:2  deleted_byte_count:105892  replica_placement:100  version:3  modified_at_second:1614861115 
-          volume id:255  size:1079581640  collection:"collection2"  file_count:14877  delete_count:3  deleted_byte_count:101223  replica_placement:100  version:3  modified_at_second:1614861233 
-          volume id:256  size:1074283592  collection:"collection2"  file_count:14157  delete_count:1  deleted_byte_count:18156  replica_placement:100  version:3  modified_at_second:1614861100 
-          volume id:257  size:1082621720  collection:"collection2"  file_count:18172  delete_count:2  deleted_byte_count:25125  replica_placement:100  version:3  modified_at_second:1614866402 
-          volume id:258  size:1075527216  collection:"collection2"  file_count:18421  delete_count:4  deleted_byte_count:267833  replica_placement:100  version:3  modified_at_second:1614866420 
-          volume id:259  size:1075507848  collection:"collection2"  file_count:18079  delete_count:2  deleted_byte_count:71992  replica_placement:100  version:3  modified_at_second:1614866381 
-          volume id:260  size:1075105664  collection:"collection2"  file_count:17316  delete_count:4  deleted_byte_count:2015310  replica_placement:100  version:3  modified_at_second:1614866226 
-          volume id:261  size:1076628592  collection:"collection2"  file_count:18355  delete_count:1  deleted_byte_count:1155  replica_placement:100  version:3  modified_at_second:1614866420 
-          volume id:262  size:1078492584  collection:"collection2"  file_count:20390  delete_count:3  deleted_byte_count:287601  replica_placement:100  version:3  modified_at_second:1614871601 
-          volume id:264  size:1081624192  collection:"collection2"  file_count:21151  replica_placement:100  version:3  modified_at_second:1614871629 
-          volume id:265  size:1076401104  collection:"collection2"  file_count:19932  delete_count:2  deleted_byte_count:160823  replica_placement:100  version:3  modified_at_second:1614871543 
-          volume id:266  size:1075617552  collection:"collection2"  file_count:20075  delete_count:1  deleted_byte_count:1039  replica_placement:100  version:3  modified_at_second:1614871526 
-          volume id:267  size:1075699376  collection:"collection2"  file_count:21039  delete_count:3  deleted_byte_count:59956  replica_placement:100  version:3  modified_at_second:1614877294 
-          volume id:270  size:1076876424  collection:"collection2"  file_count:22057  delete_count:1  deleted_byte_count:43916  replica_placement:100  version:3  modified_at_second:1614877469 
-          volume id:271  size:1076992704  collection:"collection2"  file_count:22640  delete_count:1  deleted_byte_count:30645  replica_placement:100  version:3  modified_at_second:1614877504 
-          volume id:272  size:1076145912  collection:"collection2"  file_count:21034  delete_count:2  deleted_byte_count:216564  replica_placement:100  version:3  modified_at_second:1614884139 
-          volume id:273  size:1074873432  collection:"collection2"  file_count:20511  delete_count:3  deleted_byte_count:46076  replica_placement:100  version:3  modified_at_second:1614884046 
-          volume id:274  size:1075994184  collection:"collection2"  file_count:20997  replica_placement:100  version:3  modified_at_second:1614884113 
-          volume id:275  size:1078349024  collection:"collection2"  file_count:20808  delete_count:1  deleted_byte_count:1118  replica_placement:100  version:3  modified_at_second:1614884147 
-          volume id:276  size:1076899880  collection:"collection2"  file_count:20190  delete_count:1  deleted_byte_count:8798  replica_placement:100  version:3  modified_at_second:1614884003 
-          volume id:278  size:1078798632  collection:"collection2"  file_count:20597  delete_count:5  deleted_byte_count:400060  replica_placement:100  version:3  modified_at_second:1614890292 
-          volume id:280  size:1077432160  collection:"collection2"  file_count:20286  delete_count:1  deleted_byte_count:879  replica_placement:100  version:3  modified_at_second:1614890262 
-          volume id:281  size:1077581064  collection:"collection2"  file_count:20206  delete_count:3  deleted_byte_count:143964  replica_placement:100  version:3  modified_at_second:1614890237 
-          volume id:282  size:1075232184  collection:"collection2"  file_count:22659  delete_count:4  deleted_byte_count:67915  replica_placement:100  version:3  modified_at_second:1614897304 
-          volume id:283  size:1080178880  collection:"collection2"  file_count:19462  delete_count:7  deleted_byte_count:660407  replica_placement:100  version:3  modified_at_second:1614896623 
-          volume id:286  size:1077464816  collection:"collection2"  file_count:23905  delete_count:6  deleted_byte_count:630577  replica_placement:100  version:3  modified_at_second:1614897401 
-          volume id:287  size:1074590536  collection:"collection2"  file_count:28163  delete_count:5  deleted_byte_count:35727  replica_placement:100  version:3  modified_at_second:1614904875 
-          volume id:288  size:1075406920  collection:"collection2"  file_count:27243  delete_count:2  deleted_byte_count:51519  replica_placement:100  version:3  modified_at_second:1614904738 
-          volume id:289  size:1075284312  collection:"collection2"  file_count:29342  delete_count:5  deleted_byte_count:100454  replica_placement:100  version:3  modified_at_second:1614904977 
-          volume id:290  size:1074723800  collection:"collection2"  file_count:28340  delete_count:4  deleted_byte_count:199064  replica_placement:100  version:3  modified_at_second:1614904924 
-          volume id:292  size:1092010672  collection:"collection2"  file_count:26781  delete_count:5  deleted_byte_count:508910  replica_placement:100  version:3  modified_at_second:1614912325 
-          volume id:295  size:1074702320  collection:"collection2"  file_count:24488  delete_count:3  deleted_byte_count:48555  replica_placement:100  version:3  modified_at_second:1614911929 
-          volume id:296  size:1077824056  collection:"collection2"  file_count:26741  delete_count:4  deleted_byte_count:199906  replica_placement:100  version:3  modified_at_second:1614912301 
-          volume id:297  size:1080229176  collection:"collection2"  file_count:23409  delete_count:5  deleted_byte_count:46268  replica_placement:100  version:3  modified_at_second:1614918481 
-          volume id:298  size:1075410024  collection:"collection2"  file_count:23222  delete_count:2  deleted_byte_count:46110  replica_placement:100  version:3  modified_at_second:1614918474 
-          volume id:302  size:1077559640  collection:"collection2"  file_count:23124  delete_count:7  deleted_byte_count:293111  replica_placement:100  version:3  modified_at_second:1614925500 
-          volume id:304  size:1081038944  collection:"collection2"  file_count:24505  delete_count:2  deleted_byte_count:124447  replica_placement:100  version:3  modified_at_second:1614925569 
-          volume id:305  size:1074185376  collection:"collection2"  file_count:22074  delete_count:5  deleted_byte_count:20221  replica_placement:100  version:3  modified_at_second:1614925312 
-          volume id:306  size:1074763952  collection:"collection2"  file_count:22939  replica_placement:100  version:3  modified_at_second:1614925462 
-          volume id:307  size:1076567912  collection:"collection2"  file_count:23377  delete_count:2  deleted_byte_count:25453  replica_placement:100  version:3  modified_at_second:1614931448 
-          volume id:308  size:1074022336  collection:"collection2"  file_count:23086  delete_count:2  deleted_byte_count:2127  replica_placement:100  version:3  modified_at_second:1614931401 
-          volume id:311  size:1088248344  collection:"collection2"  file_count:23553  delete_count:6  deleted_byte_count:191716  replica_placement:100  version:3  modified_at_second:1614931463 
-          volume id:312  size:1075037528  collection:"collection2"  file_count:22524  replica_placement:100  version:3  modified_at_second:1614937831 
-          volume id:313  size:1074875960  collection:"collection2"  file_count:22404  delete_count:4  deleted_byte_count:51728  replica_placement:100  version:3  modified_at_second:1614937755 
-          volume id:316  size:1077720776  collection:"collection2"  file_count:22605  delete_count:1  deleted_byte_count:8503  replica_placement:100  version:3  modified_at_second:1614937838 
-          volume id:318  size:1075965168  collection:"collection2"  file_count:22459  delete_count:2  deleted_byte_count:37778  replica_placement:100  version:3  modified_at_second:1614943862 
-          volume id:322  size:1078471536  collection:"collection2"  file_count:21905  delete_count:3  deleted_byte_count:145002  replica_placement:100  version:3  modified_at_second:1614950572 
-          volume id:323  size:1074608056  collection:"collection2"  file_count:21605  delete_count:4  deleted_byte_count:172090  replica_placement:100  version:3  modified_at_second:1614950526 
-          volume id:325  size:1080701232  collection:"collection2"  file_count:21735  replica_placement:100  version:3  modified_at_second:1614950525 
-          volume id:326  size:1076059920  collection:"collection2"  file_count:22564  delete_count:2  deleted_byte_count:192886  replica_placement:100  version:3  modified_at_second:1614950619 
-          volume id:327  size:1076121304  collection:"collection2"  file_count:22007  delete_count:3  deleted_byte_count:60358  replica_placement:100  version:3  modified_at_second:1614956487 
-          volume id:328  size:1074767816  collection:"collection2"  file_count:21720  delete_count:3  deleted_byte_count:56429  replica_placement:100  version:3  modified_at_second:1614956362 
-          volume id:329  size:1076691960  collection:"collection2"  file_count:22411  delete_count:5  deleted_byte_count:214092  replica_placement:100  version:3  modified_at_second:1614956485 
-          volume id:330  size:1080825760  collection:"collection2"  file_count:22464  delete_count:2  deleted_byte_count:15771  replica_placement:100  version:3  modified_at_second:1614956476 
-          volume id:331  size:1074957256  collection:"collection2"  file_count:21230  delete_count:4  deleted_byte_count:62145  replica_placement:100  version:3  modified_at_second:1614956259 
-          volume id:332  size:1075569928  collection:"collection2"  file_count:22097  delete_count:3  deleted_byte_count:98273  replica_placement:100  version:3  modified_at_second:1614962869 
-          volume id:333  size:1074270160  collection:"collection2"  file_count:21271  delete_count:2  deleted_byte_count:168122  replica_placement:100  version:3  modified_at_second:1614962697 
-          volume id:334  size:1075607880  collection:"collection2"  file_count:22546  delete_count:6  deleted_byte_count:101538  replica_placement:100  version:3  modified_at_second:1614962978 
-          volume id:335  size:1076235136  collection:"collection2"  file_count:22391  delete_count:3  deleted_byte_count:8838  replica_placement:100  version:3  modified_at_second:1614962970 
-          volume id:337  size:1075646896  collection:"collection2"  file_count:21934  delete_count:1  deleted_byte_count:3397  replica_placement:100  version:3  modified_at_second:1614969937 
-          volume id:339  size:1078402392  collection:"collection2"  file_count:22309  replica_placement:100  version:3  modified_at_second:1614969995 
-          volume id:340  size:1079462152  collection:"collection2"  file_count:22319  delete_count:4  deleted_byte_count:93620  replica_placement:100  version:3  modified_at_second:1614969977 
-          volume id:341  size:1074448360  collection:"collection2"  file_count:21590  delete_count:5  deleted_byte_count:160085  replica_placement:100  version:3  modified_at_second:1614969858 
-          volume id:343  size:1075345072  collection:"collection2"  file_count:21095  delete_count:2  deleted_byte_count:20581  replica_placement:100  version:3  modified_at_second:1614977148 
-          volume id:346  size:1076464112  collection:"collection2"  file_count:22320  delete_count:4  deleted_byte_count:798258  replica_placement:100  version:3  modified_at_second:1614977511 
-          volume id:347  size:1075145248  collection:"collection2"  file_count:22178  delete_count:1  deleted_byte_count:79392  replica_placement:100  version:3  modified_at_second:1614984727 
-          volume id:348  size:1080623544  collection:"collection2"  file_count:21667  delete_count:1  deleted_byte_count:2443  replica_placement:100  version:3  modified_at_second:1614984604 
-          volume id:349  size:1075957672  collection:"collection2"  file_count:22395  delete_count:2  deleted_byte_count:61565  replica_placement:100  version:3  modified_at_second:1614984748 
-          volume id:351  size:1078795120  collection:"collection2"  file_count:23660  delete_count:3  deleted_byte_count:102141  replica_placement:100  version:3  modified_at_second:1614984816 
-          volume id:352  size:1077145936  collection:"collection2"  file_count:22066  delete_count:1  deleted_byte_count:1018  replica_placement:100  version:3  modified_at_second:1614992130 
-          volume id:353  size:1074897496  collection:"collection2"  file_count:21266  delete_count:2  deleted_byte_count:3105374  replica_placement:100  version:3  modified_at_second:1614991951 
-          volume id:354  size:1085214104  collection:"collection2"  file_count:23150  delete_count:4  deleted_byte_count:82391  replica_placement:100  version:3  modified_at_second:1614992208 
-          volume id:357  size:1074276152  collection:"collection2"  file_count:23137  delete_count:4  deleted_byte_count:188487  replica_placement:100  version:3  modified_at_second:1614998792 
-          volume id:359  size:1074211296  collection:"collection2"  file_count:22437  delete_count:2  deleted_byte_count:187953  replica_placement:100  version:3  modified_at_second:1614998711 
-          volume id:360  size:1075532512  collection:"collection2"  file_count:22574  delete_count:3  deleted_byte_count:1774776  replica_placement:100  version:3  modified_at_second:1614998770 
-          volume id:361  size:1075362744  collection:"collection2"  file_count:22272  delete_count:1  deleted_byte_count:3497  replica_placement:100  version:3  modified_at_second:1614998668 
-          volume id:362  size:1074074176  collection:"collection2"  file_count:20595  delete_count:1  deleted_byte_count:112145  replica_placement:100  version:3  modified_at_second:1615004407 
-          volume id:363  size:1078859640  collection:"collection2"  file_count:23177  delete_count:4  deleted_byte_count:9601  replica_placement:100  version:3  modified_at_second:1615004823 
-          volume id:364  size:1081280880  collection:"collection2"  file_count:22686  delete_count:1  deleted_byte_count:84375  replica_placement:100  version:3  modified_at_second:1615004813 
-          volume id:365  size:1075736632  collection:"collection2"  file_count:22193  delete_count:5  deleted_byte_count:259033  replica_placement:100  version:3  modified_at_second:1615004776 
-          volume id:366  size:1075267272  collection:"collection2"  file_count:21856  delete_count:5  deleted_byte_count:138363  replica_placement:100  version:3  modified_at_second:1615004703 
-          volume id:367  size:1076403648  collection:"collection2"  file_count:22995  delete_count:2  deleted_byte_count:36955  replica_placement:100  version:3  modified_at_second:1615010985 
-          volume id:368  size:1074821960  collection:"collection2"  file_count:22252  delete_count:4  deleted_byte_count:3291946  replica_placement:100  version:3  modified_at_second:1615010877 
-          volume id:369  size:1091472040  collection:"collection2"  file_count:23709  delete_count:4  deleted_byte_count:400876  replica_placement:100  version:3  modified_at_second:1615011021 
-          volume id:370  size:1076040544  collection:"collection2"  file_count:22092  delete_count:2  deleted_byte_count:115388  replica_placement:100  version:3  modified_at_second:1615010877 
-          volume id:371  size:1078806216  collection:"collection2"  file_count:22685  delete_count:2  deleted_byte_count:68905  replica_placement:100  version:3  modified_at_second:1615010995 
-          volume id:372  size:1076193344  collection:"collection2"  file_count:22774  delete_count:1  deleted_byte_count:3495  replica_placement:100  version:3  modified_at_second:1615016911 
-          volume id:373  size:1080928088  collection:"collection2"  file_count:22617  delete_count:4  deleted_byte_count:91849  replica_placement:100  version:3  modified_at_second:1615016878 
-          volume id:374  size:1085011176  collection:"collection2"  file_count:23054  delete_count:2  deleted_byte_count:89034  replica_placement:100  version:3  modified_at_second:1615016917 
-          volume id:376  size:1074845832  collection:"collection2"  file_count:22908  delete_count:4  deleted_byte_count:432305  replica_placement:100  version:3  modified_at_second:1615016916 
-          volume id:377  size:957434264  collection:"collection2"  file_count:14929  delete_count:1  deleted_byte_count:43099  replica_placement:100  version:3  modified_at_second:1615632323 
-          volume id:379  size:1014108528  collection:"collection2"  file_count:15362  delete_count:6  deleted_byte_count:2481613  replica_placement:100  version:3  modified_at_second:1615632323 
-        Disk hdd total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660 
-      DataNode 192.168.1.5:8080 total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660 
-    Rack DefaultRack total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660 
-  DataCenter dc5 total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660 
-total size:775256653592 file_count:10478712 deleted_file:33754 deleted_bytes:10839266043 
-`
+//go:embed sample.topo.txt
+var topoData string
diff --git a/weed/shell/command_volume_mark.go b/weed/shell/command_volume_mark.go
index 19b614310..53c2265b0 100644
--- a/weed/shell/command_volume_mark.go
+++ b/weed/shell/command_volume_mark.go
@@ -3,6 +3,7 @@ package shell
 import (
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
@@ -28,10 +29,6 @@ func (c *commandVolumeMark) Help() string {
 
 func (c *commandVolumeMark) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volMarkCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := volMarkCommand.Int("volumeId", 0, "the volume id")
 	nodeStr := volMarkCommand.String("node", "", "the volume server <host>:<port>")
@@ -47,7 +44,11 @@ func (c *commandVolumeMark) Do(args []string, commandEnv *CommandEnv, writer io.
 		markWritable = true
 	}
 
-	sourceVolumeServer := *nodeStr
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	sourceVolumeServer := pb.ServerAddress(*nodeStr)
 
 	volumeId := needle.VolumeId(*volumeIdInt)
 
diff --git a/weed/shell/command_volume_mount.go b/weed/shell/command_volume_mount.go
index bd588d0b5..7b03b8dfa 100644
--- a/weed/shell/command_volume_mount.go
+++ b/weed/shell/command_volume_mount.go
@@ -3,6 +3,7 @@ package shell
 import (
 	"context"
 	"flag"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
@@ -34,10 +35,6 @@ func (c *commandVolumeMount) Help() string {
 
 func (c *commandVolumeMount) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volMountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := volMountCommand.Int("volumeId", 0, "the volume id")
 	nodeStr := volMountCommand.String("node", "", "the volume server <host>:<port>")
@@ -45,7 +42,11 @@ func (c *commandVolumeMount) Do(args []string, commandEnv *CommandEnv, writer io
 		return nil
 	}
 
-	sourceVolumeServer := *nodeStr
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	sourceVolumeServer := pb.ServerAddress(*nodeStr)
 
 	volumeId := needle.VolumeId(*volumeIdInt)
 
@@ -53,8 +54,8 @@ func (c *commandVolumeMount) Do(args []string, commandEnv *CommandEnv, writer io
 
 }
 
-func mountVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer string) (err error) {
-	return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+func mountVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer pb.ServerAddress) (err error) {
+	return operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, mountErr := volumeServerClient.VolumeMount(context.Background(), &volume_server_pb.VolumeMountRequest{
 			VolumeId: uint32(volumeId),
 		})
diff --git a/weed/shell/command_volume_move.go b/weed/shell/command_volume_move.go
index 3dcf41354..d7cc8b8ce 100644
--- a/weed/shell/command_volume_move.go
+++ b/weed/shell/command_volume_move.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/wdclient"
 	"io"
 	"log"
@@ -49,10 +50,6 @@ func (c *commandVolumeMove) Help() string {
 
 func (c *commandVolumeMove) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volMoveCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := volMoveCommand.Int("volumeId", 0, "the volume id")
 	sourceNodeStr := volMoveCommand.String("source", "", "the source volume server <host>:<port>")
@@ -62,7 +59,11 @@ func (c *commandVolumeMove) Do(args []string, commandEnv *CommandEnv, writer io.
 		return nil
 	}
 
-	sourceVolumeServer, targetVolumeServer := *sourceNodeStr, *targetNodeStr
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	sourceVolumeServer, targetVolumeServer := pb.ServerAddress(*sourceNodeStr), pb.ServerAddress(*targetNodeStr)
 
 	volumeId := needle.VolumeId(*volumeIdInt)
 
@@ -74,10 +75,10 @@ func (c *commandVolumeMove) Do(args []string, commandEnv *CommandEnv, writer io.
 }
 
 // LiveMoveVolume moves one volume from one source volume server to one target volume server, with idleTimeout to drain the incoming requests.
-func LiveMoveVolume(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer string, idleTimeout time.Duration, diskType string, skipTailError bool) (err error) {
+func LiveMoveVolume(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer pb.ServerAddress, idleTimeout time.Duration, diskType string, skipTailError bool) (err error) {
 
 	log.Printf("copying volume %d from %s to %s", volumeId, sourceVolumeServer, targetVolumeServer)
-	lastAppendAtNs, err := copyVolume(grpcDialOption, volumeId, sourceVolumeServer, targetVolumeServer, diskType)
+	lastAppendAtNs, err := copyVolume(grpcDialOption, writer, volumeId, sourceVolumeServer, targetVolumeServer, diskType)
 	if err != nil {
 		return fmt.Errorf("copy volume %d from %s to %s: %v", volumeId, sourceVolumeServer, targetVolumeServer, err)
 	}
@@ -100,7 +101,7 @@ func LiveMoveVolume(grpcDialOption grpc.DialOption, writer io.Writer, volumeId n
 	return nil
 }
 
-func copyVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer string, diskType string) (lastAppendAtNs uint64, err error) {
+func copyVolume(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer pb.ServerAddress, diskType string) (lastAppendAtNs uint64, err error) {
 
 	// check to see if the volume is already read-only and if its not then we need
 	// to mark it as read-only and then before we return we need to undo what we
@@ -111,7 +112,7 @@ func copyVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, source
 			return
 		}
 
-		clientErr := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+		clientErr := operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 			_, writableErr := volumeServerClient.VolumeMarkWritable(context.Background(), &volume_server_pb.VolumeMarkWritableRequest{
 				VolumeId: uint32(volumeId),
 			})
@@ -122,7 +123,7 @@ func copyVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, source
 		}
 	}()
 
-	err = operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	err = operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		resp, statusErr := volumeServerClient.VolumeStatus(context.Background(), &volume_server_pb.VolumeStatusRequest{
 			VolumeId: uint32(volumeId),
 		})
@@ -139,37 +140,53 @@ func copyVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, source
 		return
 	}
 
-	err = operation.WithVolumeServerClient(targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
-		resp, replicateErr := volumeServerClient.VolumeCopy(context.Background(), &volume_server_pb.VolumeCopyRequest{
+	err = operation.WithVolumeServerClient(true, targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+		stream, replicateErr := volumeServerClient.VolumeCopy(context.Background(), &volume_server_pb.VolumeCopyRequest{
 			VolumeId:       uint32(volumeId),
-			SourceDataNode: sourceVolumeServer,
+			SourceDataNode: string(sourceVolumeServer),
 			DiskType:       diskType,
 		})
-		if replicateErr == nil {
-			lastAppendAtNs = resp.LastAppendAtNs
+		if replicateErr != nil {
+			return replicateErr
 		}
-		return replicateErr
+		for {
+			resp, recvErr := stream.Recv()
+			if recvErr != nil {
+				if recvErr == io.EOF {
+					break
+				} else {
+					return recvErr
+				}
+			}
+			if resp.LastAppendAtNs != 0 {
+				lastAppendAtNs = resp.LastAppendAtNs
+			} else {
+				fmt.Fprintf(writer, "volume %d processed %d bytes\n", volumeId, resp.ProcessedBytes)
+			}
+		}
+
+		return nil
 	})
 
 	return
 }
 
-func tailVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer string, lastAppendAtNs uint64, idleTimeout time.Duration) (err error) {
+func tailVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer pb.ServerAddress, lastAppendAtNs uint64, idleTimeout time.Duration) (err error) {
 
-	return operation.WithVolumeServerClient(targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	return operation.WithVolumeServerClient(true, targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, replicateErr := volumeServerClient.VolumeTailReceiver(context.Background(), &volume_server_pb.VolumeTailReceiverRequest{
 			VolumeId:           uint32(volumeId),
 			SinceNs:            lastAppendAtNs,
 			IdleTimeoutSeconds: uint32(idleTimeout.Seconds()),
-			SourceVolumeServer: sourceVolumeServer,
+			SourceVolumeServer: string(sourceVolumeServer),
 		})
 		return replicateErr
 	})
 
 }
 
-func deleteVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer string) (err error) {
-	return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+func deleteVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer pb.ServerAddress) (err error) {
+	return operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, deleteErr := volumeServerClient.VolumeDelete(context.Background(), &volume_server_pb.VolumeDeleteRequest{
 			VolumeId: uint32(volumeId),
 		})
@@ -177,8 +194,8 @@ func deleteVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sour
 	})
 }
 
-func markVolumeWritable(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer string, writable bool) (err error) {
-	return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+func markVolumeWritable(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer pb.ServerAddress, writable bool) (err error) {
+	return operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		if writable {
 			_, err = volumeServerClient.VolumeMarkWritable(context.Background(), &volume_server_pb.VolumeMarkWritableRequest{
 				VolumeId: uint32(volumeId),
@@ -195,7 +212,7 @@ func markVolumeWritable(grpcDialOption grpc.DialOption, volumeId needle.VolumeId
 func markVolumeReplicasWritable(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, locations []wdclient.Location, writable bool) error {
 	for _, location := range locations {
 		fmt.Printf("markVolumeReadonly %d on %s ...\n", volumeId, location.Url)
-		if err := markVolumeWritable(grpcDialOption, volumeId, location.Url, writable); err != nil {
+		if err := markVolumeWritable(grpcDialOption, volumeId, location.ServerAddress(), writable); err != nil {
 			return err
 		}
 	}
diff --git a/weed/shell/command_volume_server_evacuate.go b/weed/shell/command_volume_server_evacuate.go
index 6e0c19ae1..4adce095d 100644
--- a/weed/shell/command_volume_server_evacuate.go
+++ b/weed/shell/command_volume_server_evacuate.go
@@ -8,9 +8,9 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/chrislusf/seaweedfs/weed/storage/super_block"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"golang.org/x/exp/slices"
 	"io"
 	"os"
-	"sort"
 )
 
 func init() {
@@ -44,10 +44,6 @@ func (c *commandVolumeServerEvacuate) Help() string {
 
 func (c *commandVolumeServerEvacuate) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	vsEvacuateCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeServer := vsEvacuateCommand.String("node", "", "<host>:<port> of the volume server")
 	skipNonMoveable := vsEvacuateCommand.Bool("skipNonMoveable", false, "skip volumes that can not be moved")
@@ -56,6 +52,11 @@ func (c *commandVolumeServerEvacuate) Do(args []string, commandEnv *CommandEnv,
 	if err = vsEvacuateCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChange, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	if *volumeServer == "" {
 		return fmt.Errorf("need to specify volume server by -node=<host>:<port>")
@@ -78,7 +79,7 @@ func volumeServerEvacuate(commandEnv *CommandEnv, volumeServer string, skipNonMo
 
 	// list all the volumes
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
@@ -153,11 +154,9 @@ func evacuateEcVolumes(commandEnv *CommandEnv, topologyInfo *master_pb.TopologyI
 func moveAwayOneEcVolume(commandEnv *CommandEnv, ecShardInfo *master_pb.VolumeEcShardInformationMessage, thisNode *EcNode, otherNodes []*EcNode, applyChange bool) (hasMoved bool, err error) {
 
 	for _, shardId := range erasure_coding.ShardBits(ecShardInfo.EcIndexBits).ShardIds() {
-
-		sort.Slice(otherNodes, func(i, j int) bool {
-			return otherNodes[i].localShardIdCount(ecShardInfo.Id) < otherNodes[j].localShardIdCount(ecShardInfo.Id)
+		slices.SortFunc(otherNodes, func(a, b *EcNode) bool {
+			return a.localShardIdCount(ecShardInfo.Id) < b.localShardIdCount(ecShardInfo.Id)
 		})
-
 		for i := 0; i < len(otherNodes); i++ {
 			emptyNode := otherNodes[i]
 			collectionPrefix := ""
@@ -188,10 +187,9 @@ func moveAwayOneNormalVolume(commandEnv *CommandEnv, volumeReplicas map[uint32][
 			return v.DiskType == vol.DiskType
 		})
 	}
-	sort.Slice(otherNodes, func(i, j int) bool {
-		return otherNodes[i].localVolumeRatio(fn) > otherNodes[j].localVolumeRatio(fn)
+	slices.SortFunc(otherNodes, func(a, b *Node) bool {
+		return a.localVolumeRatio(fn) > b.localVolumeRatio(fn)
 	})
-
 	for i := 0; i < len(otherNodes); i++ {
 		emptyNode := otherNodes[i]
 		hasMoved, err = maybeMoveOneVolume(commandEnv, volumeReplicas, thisNode, vol, emptyNode, applyChange)
diff --git a/weed/shell/command_volume_server_leave.go b/weed/shell/command_volume_server_leave.go
index 2a2e56e86..029ef2201 100644
--- a/weed/shell/command_volume_server_leave.go
+++ b/weed/shell/command_volume_server_leave.go
@@ -5,6 +5,7 @@ import (
 	"flag"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"google.golang.org/grpc"
 	"io"
@@ -36,26 +37,26 @@ func (c *commandVolumeServerLeave) Help() string {
 
 func (c *commandVolumeServerLeave) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	vsLeaveCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeServer := vsLeaveCommand.String("node", "", "<host>:<port> of the volume server")
 	if err = vsLeaveCommand.Parse(args); err != nil {
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	if *volumeServer == "" {
 		return fmt.Errorf("need to specify volume server by -node=<host>:<port>")
 	}
 
-	return volumeServerLeave(commandEnv.option.GrpcDialOption, *volumeServer, writer)
+	return volumeServerLeave(commandEnv.option.GrpcDialOption, pb.ServerAddress(*volumeServer), writer)
 
 }
 
-func volumeServerLeave(grpcDialOption grpc.DialOption, volumeServer string, writer io.Writer) (err error) {
-	return operation.WithVolumeServerClient(volumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+func volumeServerLeave(grpcDialOption grpc.DialOption, volumeServer pb.ServerAddress, writer io.Writer) (err error) {
+	return operation.WithVolumeServerClient(false, volumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, leaveErr := volumeServerClient.VolumeServerLeave(context.Background(), &volume_server_pb.VolumeServerLeaveRequest{})
 		if leaveErr != nil {
 			fmt.Fprintf(writer, "ask volume server %s to leave: %v\n", volumeServer, leaveErr)
diff --git a/weed/shell/command_volume_tier_download.go b/weed/shell/command_volume_tier_download.go
index 33166ce65..424a64b09 100644
--- a/weed/shell/command_volume_tier_download.go
+++ b/weed/shell/command_volume_tier_download.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"google.golang.org/grpc"
@@ -42,10 +43,6 @@ func (c *commandVolumeTierDownload) Help() string {
 
 func (c *commandVolumeTierDownload) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	tierCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeId := tierCommand.Int("volumeId", 0, "the volume id")
 	collection := tierCommand.String("collection", "", "the collection name")
@@ -53,10 +50,14 @@ func (c *commandVolumeTierDownload) Do(args []string, commandEnv *CommandEnv, wr
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	vid := needle.VolumeId(*volumeId)
 
 	// collect topology information
-	topologyInfo, _, err := collectTopologyInfo(commandEnv)
+	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
@@ -112,7 +113,7 @@ func doVolumeTierDownload(commandEnv *CommandEnv, writer io.Writer, collection s
 	// TODO parallelize this
 	for _, loc := range locations {
 		// copy the .dat file from remote tier to local
-		err = downloadDatFromRemoteTier(commandEnv.option.GrpcDialOption, writer, needle.VolumeId(vid), collection, loc.Url)
+		err = downloadDatFromRemoteTier(commandEnv.option.GrpcDialOption, writer, needle.VolumeId(vid), collection, loc.ServerAddress())
 		if err != nil {
 			return fmt.Errorf("download dat file for volume %d to %s: %v", vid, loc.Url, err)
 		}
@@ -121,9 +122,9 @@ func doVolumeTierDownload(commandEnv *CommandEnv, writer io.Writer, collection s
 	return nil
 }
 
-func downloadDatFromRemoteTier(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, collection string, targetVolumeServer string) error {
+func downloadDatFromRemoteTier(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, collection string, targetVolumeServer pb.ServerAddress) error {
 
-	err := operation.WithVolumeServerClient(targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	err := operation.WithVolumeServerClient(true, targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		stream, downloadErr := volumeServerClient.VolumeTierMoveDatFromRemote(context.Background(), &volume_server_pb.VolumeTierMoveDatFromRemoteRequest{
 			VolumeId:   uint32(volumeId),
 			Collection: collection,
diff --git a/weed/shell/command_volume_tier_move.go b/weed/shell/command_volume_tier_move.go
index c72958259..4528ca98d 100644
--- a/weed/shell/command_volume_tier_move.go
+++ b/weed/shell/command_volume_tier_move.go
@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
 	"github.com/chrislusf/seaweedfs/weed/wdclient"
@@ -19,10 +20,17 @@ func init() {
 	Commands = append(Commands, &commandVolumeTierMove{})
 }
 
+type volumeTierMoveJob struct {
+	src pb.ServerAddress
+	vid needle.VolumeId
+}
+
 type commandVolumeTierMove struct {
-	activeServers     map[string]struct{}
-	activeServersLock sync.Mutex
-	activeServersCond *sync.Cond
+	activeServers sync.Map
+	queues        map[pb.ServerAddress]chan volumeTierMoveJob
+	//activeServers     map[pb.ServerAddress]struct{}
+	//activeServersLock sync.Mutex
+	//activeServersCond *sync.Cond
 }
 
 func (c *commandVolumeTierMove) Name() string {
@@ -32,7 +40,7 @@ func (c *commandVolumeTierMove) Name() string {
 func (c *commandVolumeTierMove) Help() string {
 	return `change a volume from one disk type to another
 
-	volume.tier.move -fromDiskType=hdd -toDiskType=ssd [-collectionPattern=""] [-fullPercent=95] [-quietFor=1h]
+	volume.tier.move -fromDiskType=hdd -toDiskType=ssd [-collectionPattern=""] [-fullPercent=95] [-quietFor=1h] [-parallelLimit=4]
 
 	Even if the volume is replicated, only one replica will be changed and the rest replicas will be dropped.
 	So "volume.fix.replication" and "volume.balance" should be followed.
@@ -42,23 +50,22 @@ func (c *commandVolumeTierMove) Help() string {
 
 func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	c.activeServers = make(map[string]struct{})
-	c.activeServersCond = sync.NewCond(new(sync.Mutex))
-
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	tierCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	collectionPattern := tierCommand.String("collectionPattern", "", "match with wildcard characters '*' and '?'")
 	fullPercentage := tierCommand.Float64("fullPercent", 95, "the volume reaches the percentage of max volume size")
 	quietPeriod := tierCommand.Duration("quietFor", 24*time.Hour, "select volumes without no writes for this period")
 	source := tierCommand.String("fromDiskType", "", "the source disk type")
 	target := tierCommand.String("toDiskType", "", "the target disk type")
+	parallelLimit := tierCommand.Int("parallelLimit", 0, "limit the number of parallel copying jobs")
 	applyChange := tierCommand.Bool("force", false, "actually apply the changes")
 	if err = tierCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChange, "-force")
+
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
 
 	fromDiskType := types.ToDiskType(*source)
 	toDiskType := types.ToDiskType(*target)
@@ -68,7 +75,7 @@ func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer
 	}
 
 	// collect topology information
-	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv)
+	topologyInfo, volumeSizeLimitMb, err := collectTopologyInfo(commandEnv, 0)
 	if err != nil {
 		return err
 	}
@@ -81,15 +88,86 @@ func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer
 	fmt.Printf("tier move volumes: %v\n", volumeIds)
 
 	_, allLocations := collectVolumeReplicaLocations(topologyInfo)
+	allLocations = filterLocationsByDiskType(allLocations, toDiskType)
+	keepDataNodesSorted(allLocations, toDiskType)
+
+	if len(allLocations) > 0 && *parallelLimit > 0 && *parallelLimit < len(allLocations) {
+		allLocations = allLocations[:*parallelLimit]
+	}
+
+	wg := sync.WaitGroup{}
+	bufferLen := len(allLocations)
+	c.queues = make(map[pb.ServerAddress]chan volumeTierMoveJob)
+
+	for _, dst := range allLocations {
+		destServerAddress := pb.NewServerAddressFromDataNode(dst.dataNode)
+		c.queues[destServerAddress] = make(chan volumeTierMoveJob, bufferLen)
+
+		wg.Add(1)
+		go func(dst location, jobs <-chan volumeTierMoveJob, applyChanges bool) {
+			defer wg.Done()
+			for job := range jobs {
+				fmt.Fprintf(writer, "moving volume %d from %s to %s with disk type %s ...\n", job.vid, job.src, dst.dataNode.Id, toDiskType.ReadableString())
+
+				locations, found := commandEnv.MasterClient.GetLocations(uint32(job.vid))
+				if !found {
+					fmt.Printf("volume %d not found", job.vid)
+					continue
+				}
+
+				unlock := c.Lock(job.src)
+
+				if applyChanges {
+					if err := c.doMoveOneVolume(commandEnv, writer, job.vid, toDiskType, locations, job.src, dst); err != nil {
+						fmt.Fprintf(writer, "move volume %d %s => %s: %v\n", job.vid, job.src, dst.dataNode.Id, err)
+					}
+				}
+				unlock()
+			}
+		}(dst, c.queues[destServerAddress], *applyChange)
+	}
+
 	for _, vid := range volumeIds {
-		if err = c.doVolumeTierMove(commandEnv, writer, vid, toDiskType, allLocations, *applyChange); err != nil {
+		if err = c.doVolumeTierMove(commandEnv, writer, vid, toDiskType, allLocations); err != nil {
 			fmt.Printf("tier move volume %d: %v\n", vid, err)
 		}
+		allLocations = rotateDataNodes(allLocations)
 	}
+	for key, _ := range c.queues {
+		close(c.queues[key])
+	}
+
+	wg.Wait()
 
 	return nil
 }
 
+func (c *commandVolumeTierMove) Lock(key pb.ServerAddress) func() {
+	value, _ := c.activeServers.LoadOrStore(key, &sync.Mutex{})
+	mtx := value.(*sync.Mutex)
+	mtx.Lock()
+
+	return func() { mtx.Unlock() }
+}
+
+func filterLocationsByDiskType(dataNodes []location, diskType types.DiskType) (ret []location) {
+	for _, loc := range dataNodes {
+		_, found := loc.dataNode.DiskInfos[string(diskType)]
+		if found {
+			ret = append(ret, loc)
+		}
+	}
+	return
+}
+
+func rotateDataNodes(dataNodes []location) []location {
+	if len(dataNodes) > 0 {
+		return append(dataNodes[1:], dataNodes[0])
+	} else {
+		return dataNodes
+	}
+}
+
 func isOneOf(server string, locations []wdclient.Location) bool {
 	for _, loc := range locations {
 		if server == loc.Url {
@@ -99,7 +177,7 @@ func isOneOf(server string, locations []wdclient.Location) bool {
 	return false
 }
 
-func (c *commandVolumeTierMove) doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, allLocations []location, applyChanges bool) (err error) {
+func (c *commandVolumeTierMove) doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, allLocations []location) (err error) {
 	// find volume location
 	locations, found := commandEnv.MasterClient.GetLocations(uint32(vid))
 	if !found {
@@ -108,61 +186,32 @@ func (c *commandVolumeTierMove) doVolumeTierMove(commandEnv *CommandEnv, writer
 
 	// find one server with the most empty volume slots with target disk type
 	hasFoundTarget := false
-	keepDataNodesSorted(allLocations, toDiskType)
 	fn := capacityByFreeVolumeCount(toDiskType)
-	wg := sync.WaitGroup{}
 	for _, dst := range allLocations {
 		if fn(dst.dataNode) > 0 && !hasFoundTarget {
 			// ask the volume server to replicate the volume
 			if isOneOf(dst.dataNode.Id, locations) {
 				continue
 			}
-			sourceVolumeServer := ""
+			var sourceVolumeServer pb.ServerAddress
 			for _, loc := range locations {
 				if loc.Url != dst.dataNode.Id {
-					sourceVolumeServer = loc.Url
+					sourceVolumeServer = loc.ServerAddress()
 				}
 			}
 			if sourceVolumeServer == "" {
 				continue
 			}
-			fmt.Fprintf(writer, "moving volume %d from %s to %s with disk type %s ...\n", vid, sourceVolumeServer, dst.dataNode.Id, toDiskType.ReadableString())
 			hasFoundTarget = true
 
-			if !applyChanges {
-				// adjust volume count
-				dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++
-				break
-			}
-
-			c.activeServersCond.L.Lock()
-			_, isSourceActive := c.activeServers[sourceVolumeServer]
-			_, isDestActive := c.activeServers[dst.dataNode.Id]
-			for isSourceActive || isDestActive {
-				c.activeServersCond.Wait()
-				_, isSourceActive = c.activeServers[sourceVolumeServer]
-				_, isDestActive = c.activeServers[dst.dataNode.Id]
-			}
-			c.activeServers[sourceVolumeServer] = struct{}{}
-			c.activeServers[dst.dataNode.Id] = struct{}{}
-			c.activeServersCond.L.Unlock()
-
-			wg.Add(1)
-			go func(dst location) {
-				if err := c.doMoveOneVolume(commandEnv, writer, vid, toDiskType, locations, sourceVolumeServer, dst); err != nil {
-					fmt.Fprintf(writer, "move volume %d %s => %s: %v\n", vid, sourceVolumeServer, dst.dataNode.Id, err)
-				}
-				delete(c.activeServers, sourceVolumeServer)
-				delete(c.activeServers, dst.dataNode.Id)
-				c.activeServersCond.Signal()
-				wg.Done()
-			}(dst)
+			// adjust volume count
+			dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++
 
+			destServerAddress := pb.NewServerAddressFromDataNode(dst.dataNode)
+			c.queues[destServerAddress] <- volumeTierMoveJob{sourceVolumeServer, vid}
 		}
 	}
 
-	wg.Wait()
-
 	if !hasFoundTarget {
 		fmt.Fprintf(writer, "can not find disk type %s for volume %d\n", toDiskType.ReadableString(), vid)
 	}
@@ -170,13 +219,13 @@ func (c *commandVolumeTierMove) doVolumeTierMove(commandEnv *CommandEnv, writer
 	return nil
 }
 
-func (c *commandVolumeTierMove) doMoveOneVolume(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, locations []wdclient.Location, sourceVolumeServer string, dst location) (err error) {
+func (c *commandVolumeTierMove) doMoveOneVolume(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, locations []wdclient.Location, sourceVolumeServer pb.ServerAddress, dst location) (err error) {
 
 	// mark all replicas as read only
 	if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, false); err != nil {
 		return fmt.Errorf("mark volume %d as readonly on %s: %v", vid, locations[0].Url, err)
 	}
-	if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, writer, vid, sourceVolumeServer, dst.dataNode.Id, 5*time.Second, toDiskType.ReadableString(), true); err != nil {
+	if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, writer, vid, sourceVolumeServer, pb.NewServerAddressFromDataNode(dst.dataNode), 5*time.Second, toDiskType.ReadableString(), true); err != nil {
 
 		// mark all replicas as writable
 		if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, true); err != nil {
@@ -186,15 +235,13 @@ func (c *commandVolumeTierMove) doMoveOneVolume(commandEnv *CommandEnv, writer i
 		return fmt.Errorf("move volume %d %s => %s : %v", vid, locations[0].Url, dst.dataNode.Id, err)
 	}
 
-	// adjust volume count
-	dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++
-
 	// remove the remaining replicas
 	for _, loc := range locations {
-		if loc.Url != dst.dataNode.Id && loc.Url != sourceVolumeServer {
-			if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.Url); err != nil {
+		if loc.Url != dst.dataNode.Id && loc.ServerAddress() != sourceVolumeServer {
+			if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.ServerAddress()); err != nil {
 				fmt.Fprintf(writer, "failed to delete volume %d on %s: %v\n", vid, loc.Url, err)
 			}
+			// reduce volume count? Not really necessary since they are "more" full and will not be a candidate to move to
 		}
 	}
 	return nil
diff --git a/weed/shell/command_volume_tier_upload.go b/weed/shell/command_volume_tier_upload.go
index c8540a7dc..0df0790e6 100644
--- a/weed/shell/command_volume_tier_upload.go
+++ b/weed/shell/command_volume_tier_upload.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 	"time"
 
@@ -56,10 +57,6 @@ func (c *commandVolumeTierUpload) Help() string {
 
 func (c *commandVolumeTierUpload) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	tierCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeId := tierCommand.Int("volumeId", 0, "the volume id")
 	collection := tierCommand.String("collection", "", "the collection name")
@@ -71,6 +68,10 @@ func (c *commandVolumeTierUpload) Do(args []string, commandEnv *CommandEnv, writ
 		return nil
 	}
 
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
 	vid := needle.VolumeId(*volumeId)
 
 	// volumeId is provided
@@ -107,7 +108,7 @@ func doVolumeTierUpload(commandEnv *CommandEnv, writer io.Writer, collection str
 	}
 
 	// copy the .dat file to remote tier
-	err = uploadDatToRemoteTier(commandEnv.option.GrpcDialOption, writer, needle.VolumeId(vid), collection, locations[0].Url, dest, keepLocalDatFile)
+	err = uploadDatToRemoteTier(commandEnv.option.GrpcDialOption, writer, needle.VolumeId(vid), collection, locations[0].ServerAddress(), dest, keepLocalDatFile)
 	if err != nil {
 		return fmt.Errorf("copy dat file for volume %d on %s to %s: %v", vid, locations[0].Url, dest, err)
 	}
@@ -115,9 +116,9 @@ func doVolumeTierUpload(commandEnv *CommandEnv, writer io.Writer, collection str
 	return nil
 }
 
-func uploadDatToRemoteTier(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, collection string, sourceVolumeServer string, dest string, keepLocalDatFile bool) error {
+func uploadDatToRemoteTier(grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, collection string, sourceVolumeServer pb.ServerAddress, dest string, keepLocalDatFile bool) error {
 
-	err := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+	err := operation.WithVolumeServerClient(true, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		stream, copyErr := volumeServerClient.VolumeTierMoveDatToRemote(context.Background(), &volume_server_pb.VolumeTierMoveDatToRemoteRequest{
 			VolumeId:               uint32(volumeId),
 			Collection:             collection,
diff --git a/weed/shell/command_volume_unmount.go b/weed/shell/command_volume_unmount.go
index f7e5a501b..85bec44f7 100644
--- a/weed/shell/command_volume_unmount.go
+++ b/weed/shell/command_volume_unmount.go
@@ -3,6 +3,7 @@ package shell
 import (
 	"context"
 	"flag"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
@@ -34,10 +35,6 @@ func (c *commandVolumeUnmount) Help() string {
 
 func (c *commandVolumeUnmount) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volUnmountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	volumeIdInt := volUnmountCommand.Int("volumeId", 0, "the volume id")
 	nodeStr := volUnmountCommand.String("node", "", "the volume server <host>:<port>")
@@ -45,7 +42,11 @@ func (c *commandVolumeUnmount) Do(args []string, commandEnv *CommandEnv, writer
 		return nil
 	}
 
-	sourceVolumeServer := *nodeStr
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	sourceVolumeServer := pb.ServerAddress(*nodeStr)
 
 	volumeId := needle.VolumeId(*volumeIdInt)
 
@@ -53,8 +54,8 @@ func (c *commandVolumeUnmount) Do(args []string, commandEnv *CommandEnv, writer
 
 }
 
-func unmountVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer string) (err error) {
-	return operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+func unmountVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer pb.ServerAddress) (err error) {
+	return operation.WithVolumeServerClient(false, sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		_, unmountErr := volumeServerClient.VolumeUnmount(context.Background(), &volume_server_pb.VolumeUnmountRequest{
 			VolumeId: uint32(volumeId),
 		})
diff --git a/weed/shell/command_volume_vacuum.go b/weed/shell/command_volume_vacuum.go
index 56f85f4fe..37b8aa030 100644
--- a/weed/shell/command_volume_vacuum.go
+++ b/weed/shell/command_volume_vacuum.go
@@ -22,26 +22,30 @@ func (c *commandVacuum) Name() string {
 func (c *commandVacuum) Help() string {
 	return `compact volumes if deleted entries are more than the limit
 
-	volume.vacuum [-garbageThreshold=0.3]
+	volume.vacuum [-garbageThreshold=0.3] [-collection=<collection name>] [-volumeId=<volume id>]
 
 `
 }
 
 func (c *commandVacuum) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
 
-	if err = commandEnv.confirmIsLocked(); err != nil {
-		return
-	}
-
 	volumeVacuumCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	garbageThreshold := volumeVacuumCommand.Float64("garbageThreshold", 0.3, "vacuum when garbage is more than this limit")
+	collection := volumeVacuumCommand.String("collection", "", "vacuum this collection")
+	volumeId := volumeVacuumCommand.Uint("volumeId", 0, "the volume id")
 	if err = volumeVacuumCommand.Parse(args); err != nil {
 		return nil
 	}
 
-	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+	if err = commandEnv.confirmIsLocked(args); err != nil {
+		return
+	}
+
+	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
 		_, err = client.VacuumVolume(context.Background(), &master_pb.VacuumVolumeRequest{
 			GarbageThreshold: float32(*garbageThreshold),
+			VolumeId:         uint32(*volumeId),
+			Collection:       *collection,
 		})
 		return err
 	})
diff --git a/weed/shell/commands.go b/weed/shell/commands.go
index 5497e89cc..08f639d34 100644
--- a/weed/shell/commands.go
+++ b/weed/shell/commands.go
@@ -22,14 +22,15 @@ type ShellOptions struct {
 	// shell transient context
 	FilerHost    string
 	FilerPort    int64
-	FilerAddress string
+	FilerGroup   *string
+	FilerAddress pb.ServerAddress
 	Directory    string
 }
 
 type CommandEnv struct {
 	env          map[string]string
 	MasterClient *wdclient.MasterClient
-	option       ShellOptions
+	option       *ShellOptions
 	locker       *exclusive_locks.ExclusiveLocker
 }
 
@@ -43,13 +44,13 @@ var (
 	Commands = []command{}
 )
 
-func NewCommandEnv(options ShellOptions) *CommandEnv {
+func NewCommandEnv(options *ShellOptions) *CommandEnv {
 	ce := &CommandEnv{
 		env:          make(map[string]string),
-		MasterClient: wdclient.NewMasterClient(options.GrpcDialOption, pb.AdminShellClient, "", 0, "", strings.Split(*options.Masters, ",")),
+		MasterClient: wdclient.NewMasterClient(options.GrpcDialOption, *options.FilerGroup, pb.AdminShellClient, "", "", pb.ServerAddresses(*options.Masters).ToAddressMap()),
 		option:       options,
 	}
-	ce.locker = exclusive_locks.NewExclusiveLocker(ce.MasterClient)
+	ce.locker = exclusive_locks.NewExclusiveLocker(ce.MasterClient, "admin")
 	return ce
 }
 
@@ -70,11 +71,12 @@ func (ce *CommandEnv) isDirectory(path string) bool {
 
 }
 
-func (ce *CommandEnv) confirmIsLocked() error {
+func (ce *CommandEnv) confirmIsLocked(args []string) error {
 
 	if ce.locker.IsLocking() {
 		return nil
 	}
+	ce.locker.SetMessage(fmt.Sprintf("%v", args))
 
 	return fmt.Errorf("need to run \"lock\" first to continue")
 
@@ -96,10 +98,9 @@ func (ce *CommandEnv) checkDirectory(path string) error {
 
 var _ = filer_pb.FilerClient(&CommandEnv{})
 
-func (ce *CommandEnv) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
+func (ce *CommandEnv) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error {
 
-	filerGrpcAddress := fmt.Sprintf("%s:%d", ce.option.FilerHost, ce.option.FilerPort+10000)
-	return pb.WithGrpcFilerClient(filerGrpcAddress, ce.option.GrpcDialOption, fn)
+	return pb.WithGrpcFilerClient(streamingMode, ce.option.FilerAddress, ce.option.GrpcDialOption, fn)
 
 }
 
diff --git a/weed/shell/sample.topo.txt b/weed/shell/sample.topo.txt
new file mode 100644
index 000000000..b3ceaa140
--- /dev/null
+++ b/weed/shell/sample.topo.txt
@@ -0,0 +1,804 @@
+Topology volumeSizeLimit:1024 MB hdd(volume:760/7280 active:760 free:6520 remote:0)
+  DataCenter dc1 hdd(volume:0/0 active:0 free:0 remote:0)
+    Rack DefaultRack hdd(volume:0/0 active:0 free:0 remote:0)
+    Rack DefaultRack total size:0 file_count:0
+  DataCenter dc1 total size:0 file_count:0
+  DataCenter dc2 hdd(volume:86/430 active:86 free:344 remote:0)
+    Rack rack1 hdd(volume:50/240 active:50 free:190 remote:0)
+      DataNode 192.168.1.4:8080 hdd(volume:50/240 active:50 free:190 remote:0)
+        Disk hdd(volume:50/240 active:50 free:190 remote:0)
+          volume id:15  size:1115965064  collection:"collection0"  file_count:83  replica_placement:100  version:3  modified_at_second:1609923671
+          volume id:21  size:1097631536  collection:"collection0"  file_count:82  delete_count:7  deleted_byte_count:68975485  replica_placement:100  version:3  modified_at_second:1609929578
+          volume id:22  size:1086828272  collection:"collection0"  file_count:75  replica_placement:100  version:3  modified_at_second:1609930001
+          volume id:23  size:1076380216  collection:"collection0"  file_count:68  replica_placement:100  version:3  modified_at_second:1609930434
+          volume id:24  size:1074139776  collection:"collection0"  file_count:90  replica_placement:100  version:3  modified_at_second:1609930909
+          volume id:25  size:690757512  collection:"collection0"  file_count:38  replica_placement:100  version:3  modified_at_second:1611144216
+          volume id:27  size:298886792  file_count:1608  replica_placement:100  version:3  modified_at_second:1615632482
+          volume id:28  size:308919192  file_count:1591  delete_count:1  deleted_byte_count:125280  replica_placement:100  version:3  modified_at_second:1615631762
+          volume id:29  size:281582680  file_count:1537  replica_placement:100  version:3  modified_at_second:1615629422
+          volume id:30  size:289466144  file_count:1566  delete_count:1  deleted_byte_count:124972  replica_placement:100  version:3  modified_at_second:1615632422
+          volume id:31  size:273363256  file_count:1498  replica_placement:100  version:3  modified_at_second:1615631642
+          volume id:33  size:1130226400  collection:"collection1"  file_count:7322  delete_count:172  deleted_byte_count:45199399  replica_placement:100  version:3  modified_at_second:1615618789
+          volume id:38  size:1075545744  collection:"collection1"  file_count:13324  delete_count:100  deleted_byte_count:25223906  replica_placement:100  version:3  modified_at_second:1615569830
+          volume id:51  size:1076796120  collection:"collection1"  file_count:10550  delete_count:39  deleted_byte_count:12723654  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615547786
+          volume id:52  size:1083529728  collection:"collection1"  file_count:10128  delete_count:32  deleted_byte_count:10608391  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615599195
+          volume id:54  size:1045022344  collection:"collection1"  file_count:9408  delete_count:30  deleted_byte_count:15132106  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630812
+          volume id:63  size:956941112  collection:"collection1"  file_count:8271  delete_count:32  deleted_byte_count:15876189  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632036
+          volume id:69  size:869213648  collection:"collection1"  file_count:7293  delete_count:102  deleted_byte_count:30643207  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630534
+          volume id:74  size:957046128  collection:"collection1"  file_count:6982  delete_count:258  deleted_byte_count:73054259  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631460
+          volume id:80  size:827912928  collection:"collection1"  file_count:6914  delete_count:17  deleted_byte_count:5689635  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631157
+          volume id:84  size:873121856  collection:"collection1"  file_count:8200  delete_count:13  deleted_byte_count:3131676  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631161
+          volume id:85  size:1023869320  collection:"collection1"  file_count:7788  delete_count:234  deleted_byte_count:78037967  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631723
+          volume id:97  size:1053112992  collection:"collection1"  file_count:6789  delete_count:50  deleted_byte_count:38894001  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631193
+          volume id:98  size:1077836440  collection:"collection1"  file_count:7605  delete_count:202  deleted_byte_count:73180379  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615523691
+          volume id:105  size:1073996824  collection:"collection1"  file_count:6872  delete_count:20  deleted_byte_count:14482293  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615499757
+          volume id:106  size:1075458664  collection:"collection1"  file_count:7182  delete_count:307  deleted_byte_count:69349053  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615598137
+          volume id:112  size:1076392512  collection:"collection1"  file_count:8291  delete_count:156  deleted_byte_count:74120183  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615569823
+          volume id:116  size:1074489504  collection:"collection1"  file_count:9981  delete_count:174  deleted_byte_count:53998777  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615611565
+          volume id:119  size:1075940104  collection:"collection1"  file_count:9003  delete_count:12  deleted_byte_count:9128155  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615573878
+          volume id:128  size:1074874632  collection:"collection1"  file_count:9821  delete_count:148  deleted_byte_count:43633334  replica_placement:100  version:3  modified_at_second:1615602670
+          volume id:133  size:1075952760  collection:"collection1"  file_count:9538  delete_count:74  deleted_byte_count:19558008  replica_placement:100  version:3  modified_at_second:1615584779
+          volume id:136  size:1074433552  collection:"collection1"  file_count:9593  delete_count:72  deleted_byte_count:26912512  replica_placement:100  version:3  modified_at_second:1615376036
+          volume id:138  size:1074465744  collection:"collection1"  file_count:10120  delete_count:55  deleted_byte_count:15875438  replica_placement:100  version:3  modified_at_second:1615572231
+          volume id:140  size:1076203744  collection:"collection1"  file_count:11219  delete_count:57  deleted_byte_count:19864498  replica_placement:100  version:3  modified_at_second:1615571947
+          volume id:144  size:1074549720  collection:"collection1"  file_count:8780  delete_count:50  deleted_byte_count:52475146  replica_placement:100  version:3  modified_at_second:1615573451
+          volume id:161  size:1077397192  collection:"collection1"  file_count:9988  delete_count:28  deleted_byte_count:12509164  replica_placement:100  version:3  modified_at_second:1615631452
+          volume id:173  size:1074154704  collection:"collection1"  file_count:30884  delete_count:34  deleted_byte_count:2578509  replica_placement:100  version:3  modified_at_second:1615591904
+          volume id:174  size:1073824232  collection:"collection1"  file_count:30689  delete_count:36  deleted_byte_count:2160116  replica_placement:100  version:3  modified_at_second:1615598914
+          volume id:197  size:1075423240  collection:"collection1"  file_count:16473  delete_count:15  deleted_byte_count:12552442  replica_placement:100  version:3  modified_at_second:1615485254
+          volume id:219  size:1092298904  collection:"collection1"  file_count:3193  delete_count:17  deleted_byte_count:2047576  replica_placement:100  version:3  modified_at_second:1615579316
+          volume id:263  size:1077167352  collection:"collection2"  file_count:20227  delete_count:4  deleted_byte_count:97887  replica_placement:100  version:3  modified_at_second:1614871567
+          volume id:272  size:1076146040  collection:"collection2"  file_count:21034  delete_count:2  deleted_byte_count:216564  replica_placement:100  version:3  modified_at_second:1614884139
+          volume id:291  size:1076256760  collection:"collection2"  file_count:28301  delete_count:5  deleted_byte_count:116027  replica_placement:100  version:3  modified_at_second:1614904924
+          volume id:299  size:1075147824  collection:"collection2"  file_count:22927  delete_count:4  deleted_byte_count:345569  replica_placement:100  version:3  modified_at_second:1614918454
+          volume id:301  size:1074655600  collection:"collection2"  file_count:22543  delete_count:6  deleted_byte_count:136968  replica_placement:100  version:3  modified_at_second:1614918378
+          volume id:302  size:1077559792  collection:"collection2"  file_count:23124  delete_count:7  deleted_byte_count:293111  replica_placement:100  version:3  modified_at_second:1614925500
+          volume id:339  size:1078402392  collection:"collection2"  file_count:22309  replica_placement:100  version:3  modified_at_second:1614969996
+          volume id:345  size:1074560760  collection:"collection2"  file_count:22117  delete_count:2  deleted_byte_count:373286  replica_placement:100  version:3  modified_at_second:1614977458
+          volume id:355  size:1075239792  collection:"collection2"  file_count:22244  delete_count:1  deleted_byte_count:23282  replica_placement:100  version:3  modified_at_second:1614992157
+          volume id:373  size:1080928000  collection:"collection2"  file_count:22617  delete_count:4  deleted_byte_count:91849  replica_placement:100  version:3  modified_at_second:1615016877
+        Disk hdd total size:48630015544 file_count:537880 deleted_file:2580 deleted_bytes:929560253
+      DataNode 192.168.1.4:8080 total size:48630015544 file_count:537880 deleted_file:2580 deleted_bytes:929560253
+    Rack rack1 total size:48630015544 file_count:537880 deleted_file:2580 deleted_bytes:929560253
+    Rack rack2 hdd(volume:36/190 active:36 free:154 remote:0)
+      DataNode 192.168.1.2:8080 hdd(volume:36/190 active:36 free:154 remote:0)
+        Disk hdd(volume:36/190 active:36 free:154 remote:0)
+          volume id:2  size:289228560  file_count:1640  delete_count:4  deleted_byte_count:480564  replica_placement:100  version:3  compact_revision:6  modified_at_second:1615630622
+          volume id:3  size:308743136  file_count:1638  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632242
+          volume id:4  size:285986968  file_count:1641  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632302
+          volume id:6  size:302411024  file_count:1604  delete_count:2  deleted_byte_count:274587  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631402
+          volume id:7  size:1924728  collection:"collection4"  file_count:15  replica_placement:100  version:3  modified_at_second:1609331040
+          volume id:9  size:77337416  collection:"collection3"  file_count:58  replica_placement:100  version:3  ttl:772  modified_at_second:1615513762
+          volume id:10  size:1212784656  collection:"collection0"  file_count:58  replica_placement:100  version:3  modified_at_second:1609814550
+          volume id:12  size:1110923848  collection:"collection0"  file_count:45  replica_placement:100  version:3  modified_at_second:1609819732
+          volume id:13  size:1184910656  collection:"collection0"  file_count:47  replica_placement:100  version:3  modified_at_second:1609827837
+          volume id:14  size:1107475720  collection:"collection0"  file_count:80  delete_count:3  deleted_byte_count:6870  replica_placement:100  version:3  modified_at_second:1612956980
+          volume id:16  size:1113666104  collection:"collection0"  file_count:73  delete_count:5  deleted_byte_count:6318  replica_placement:100  version:3  modified_at_second:1612957007
+          volume id:17  size:1095115800  collection:"collection0"  file_count:83  delete_count:3  deleted_byte_count:7099  replica_placement:100  version:3  modified_at_second:1612957000
+          volume id:21  size:1097631664  collection:"collection0"  file_count:82  delete_count:11  deleted_byte_count:68985100  replica_placement:100  version:3  modified_at_second:1612957007
+          volume id:56  size:1001897616  collection:"collection1"  file_count:8762  delete_count:37  deleted_byte_count:65375405  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632014
+          volume id:81  size:880693104  collection:"collection1"  file_count:7481  delete_count:236  deleted_byte_count:80386421  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631396
+          volume id:104  size:1076383624  collection:"collection1"  file_count:7663  delete_count:184  deleted_byte_count:100728071  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615602658
+          volume id:107  size:1073811840  collection:"collection1"  file_count:7436  delete_count:168  deleted_byte_count:57747484  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615293569
+          volume id:113  size:1076709184  collection:"collection1"  file_count:9355  delete_count:177  deleted_byte_count:59796765  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615569822
+          volume id:139  size:1074163936  collection:"collection1"  file_count:9315  delete_count:42  deleted_byte_count:10630966  replica_placement:100  version:3  modified_at_second:1615571946
+          volume id:151  size:1098659752  collection:"collection1"  file_count:10808  delete_count:24  deleted_byte_count:7088102  replica_placement:100  version:3  modified_at_second:1615586389
+          volume id:155  size:1075140688  collection:"collection1"  file_count:10882  delete_count:32  deleted_byte_count:9076141  replica_placement:100  version:3  modified_at_second:1615606614
+          volume id:167  size:1073958176  collection:"collection1"  file_count:25229  delete_count:48  deleted_byte_count:25871565  replica_placement:100  version:3  modified_at_second:1615602669
+          volume id:177  size:1074120216  collection:"collection1"  file_count:22293  delete_count:16  deleted_byte_count:3803952  replica_placement:100  version:3  modified_at_second:1615516892
+          volume id:179  size:1074313920  collection:"collection1"  file_count:21829  delete_count:24  deleted_byte_count:45552859  replica_placement:100  version:3  modified_at_second:1615580308
+          volume id:182  size:1076131280  collection:"collection1"  file_count:31987  delete_count:21  deleted_byte_count:1452346  replica_placement:100  version:3  modified_at_second:1615568922
+          volume id:215  size:1068268216  collection:"collection1"  file_count:2813  delete_count:10  deleted_byte_count:5676795  replica_placement:100  version:3  modified_at_second:1615586386
+          volume id:217  size:1075381872  collection:"collection1"  file_count:3331  delete_count:14  deleted_byte_count:2009141  replica_placement:100  version:3  modified_at_second:1615401638
+          volume id:283  size:1080178944  collection:"collection2"  file_count:19462  delete_count:7  deleted_byte_count:660407  replica_placement:100  version:3  modified_at_second:1614896626
+          volume id:303  size:1075944504  collection:"collection2"  file_count:22541  delete_count:2  deleted_byte_count:13617  replica_placement:100  version:3  modified_at_second:1614925431
+          volume id:309  size:1075178624  collection:"collection2"  file_count:22692  delete_count:3  deleted_byte_count:171124  replica_placement:100  version:3  modified_at_second:1614931409
+          volume id:323  size:1074608200  collection:"collection2"  file_count:21605  delete_count:4  deleted_byte_count:172090  replica_placement:100  version:3  modified_at_second:1614950526
+          volume id:344  size:1075035448  collection:"collection2"  file_count:21765  delete_count:1  deleted_byte_count:24623  replica_placement:100  version:3  modified_at_second:1614977465
+          volume id:347  size:1075145496  collection:"collection2"  file_count:22178  delete_count:1  deleted_byte_count:79392  replica_placement:100  version:3  modified_at_second:1614984727
+          volume id:357  size:1074276208  collection:"collection2"  file_count:23137  delete_count:4  deleted_byte_count:188487  replica_placement:100  version:3  modified_at_second:1614998792
+          volume id:380  size:1010760456  collection:"collection2"  file_count:14921  delete_count:6  deleted_byte_count:65678  replica_placement:100  version:3  modified_at_second:1615632322
+          volume id:381  size:939292792  collection:"collection2"  file_count:14619  delete_count:2  deleted_byte_count:5119  replica_placement:100  version:3  modified_at_second:1615632324
+        Disk hdd total size:33468194376 file_count:369168 deleted_file:1091 deleted_bytes:546337088
+      DataNode 192.168.1.2:8080 total size:33468194376 file_count:369168 deleted_file:1091 deleted_bytes:546337088
+    Rack rack2 total size:33468194376 file_count:369168 deleted_file:1091 deleted_bytes:546337088
+  DataCenter dc2 total size:82098209920 file_count:907048 deleted_file:3671 deleted_bytes:1475897341
+  DataCenter dc3 hdd(volume:108/1850 active:108 free:1742 remote:0)
+    Rack rack3 hdd(volume:108/1850 active:108 free:1742 remote:0)
+      DataNode 192.168.1.6:8080 hdd(volume:108/1850 active:108 free:1742 remote:0)
+        Disk hdd(volume:108/1850 active:108 free:1742 remote:0)
+          volume id:1  size:284685936  file_count:1557  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632062
+          volume id:32  size:281390512  file_count:1496  delete_count:6  deleted_byte_count:546403  replica_placement:100  version:3  modified_at_second:1615632362
+          volume id:47  size:444599784  collection:"collection1"  file_count:709  delete_count:19  deleted_byte_count:11913451  replica_placement:100  version:3  modified_at_second:1615632397
+          volume id:49  size:1078775288  collection:"collection1"  file_count:9636  delete_count:22  deleted_byte_count:5625976  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630446
+          volume id:68  size:898630584  collection:"collection1"  file_count:6934  delete_count:95  deleted_byte_count:27460707  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632284
+          volume id:88  size:1073767976  collection:"collection1"  file_count:14995  delete_count:206  deleted_byte_count:81222360  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615629897
+          volume id:202  size:1077533160  collection:"collection1"  file_count:2847  delete_count:67  deleted_byte_count:65172985  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615588497
+          volume id:203  size:1027316272  collection:"collection1"  file_count:3040  delete_count:11  deleted_byte_count:3993230  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631728
+          volume id:205  size:1078485304  collection:"collection1"  file_count:2869  delete_count:43  deleted_byte_count:18290259  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615579314
+          volume id:206  size:1082045848  collection:"collection1"  file_count:2979  delete_count:225  deleted_byte_count:88220074  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615564274
+          volume id:209  size:1074083592  collection:"collection1"  file_count:3238  delete_count:4  deleted_byte_count:1494244  replica_placement:100  version:3  modified_at_second:1615419954
+          volume id:211  size:1080610712  collection:"collection1"  file_count:3247  delete_count:7  deleted_byte_count:1891456  replica_placement:100  version:3  modified_at_second:1615269124
+          volume id:212  size:1078293360  collection:"collection1"  file_count:3106  delete_count:6  deleted_byte_count:2085755  replica_placement:100  version:3  modified_at_second:1615586387
+          volume id:213  size:1093587976  collection:"collection1"  file_count:3681  delete_count:12  deleted_byte_count:3138791  replica_placement:100  version:3  modified_at_second:1615586387
+          volume id:214  size:1074486992  collection:"collection1"  file_count:3217  delete_count:10  deleted_byte_count:6392871  replica_placement:100  version:3  modified_at_second:1615586383
+          volume id:216  size:1080073496  collection:"collection1"  file_count:3316  delete_count:4  deleted_byte_count:179819  replica_placement:100  version:3  modified_at_second:1615586387
+          volume id:222  size:1106623104  collection:"collection1"  file_count:3273  delete_count:11  deleted_byte_count:2114627  replica_placement:100  version:3  modified_at_second:1615586243
+          volume id:223  size:1075233064  collection:"collection1"  file_count:2966  delete_count:9  deleted_byte_count:744001  replica_placement:100  version:3  modified_at_second:1615586244
+          volume id:227  size:1106699896  collection:"collection1"  file_count:2827  delete_count:20  deleted_byte_count:5496790  replica_placement:100  version:3  modified_at_second:1615609989
+          volume id:229  size:1109855312  collection:"collection1"  file_count:2857  delete_count:22  deleted_byte_count:2839883  replica_placement:100  version:3  modified_at_second:1615609988
+          volume id:230  size:1080722984  collection:"collection1"  file_count:2898  delete_count:15  deleted_byte_count:3929261  replica_placement:100  version:3  modified_at_second:1615610537
+          volume id:231  size:1112917696  collection:"collection1"  file_count:3151  delete_count:20  deleted_byte_count:2989828  replica_placement:100  version:3  modified_at_second:1615611350
+          volume id:233  size:1080526464  collection:"collection1"  file_count:3136  delete_count:61  deleted_byte_count:17991717  replica_placement:100  version:3  modified_at_second:1615611352
+          volume id:234  size:1073835280  collection:"collection1"  file_count:2965  delete_count:41  deleted_byte_count:4960354  replica_placement:100  version:3  modified_at_second:1615611351
+          volume id:235  size:1075586104  collection:"collection1"  file_count:2767  delete_count:33  deleted_byte_count:3216540  replica_placement:100  version:3  modified_at_second:1615611354
+          volume id:237  size:375722792  collection:"collection1"  file_count:736  delete_count:16  deleted_byte_count:4464870  replica_placement:100  version:3  modified_at_second:1615631727
+          volume id:239  size:426569024  collection:"collection1"  file_count:693  delete_count:19  deleted_byte_count:13020783  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630838
+          volume id:241  size:380217424  collection:"collection1"  file_count:633  delete_count:6  deleted_byte_count:1715768  replica_placement:100  version:3  modified_at_second:1615632006
+          volume id:244  size:1080295352  collection:"collection2"  file_count:10812  delete_count:1  deleted_byte_count:795  replica_placement:100  version:3  modified_at_second:1614852171
+          volume id:245  size:1074597056  collection:"collection2"  file_count:10371  delete_count:3  deleted_byte_count:209701  replica_placement:100  version:3  modified_at_second:1614852093
+          volume id:246  size:1075998648  collection:"collection2"  file_count:10365  delete_count:1  deleted_byte_count:13112  replica_placement:100  version:3  modified_at_second:1614852105
+          volume id:248  size:1084301184  collection:"collection2"  file_count:11217  delete_count:4  deleted_byte_count:746488  replica_placement:100  version:3  modified_at_second:1614856285
+          volume id:249  size:1074819136  collection:"collection2"  file_count:10763  delete_count:2  deleted_byte_count:271699  replica_placement:100  version:3  modified_at_second:1614856230
+          volume id:251  size:1075684488  collection:"collection2"  file_count:10847  replica_placement:100  version:3  modified_at_second:1614856270
+          volume id:252  size:1075065208  collection:"collection2"  file_count:14622  delete_count:2  deleted_byte_count:5228  replica_placement:100  version:3  modified_at_second:1614861196
+          volume id:253  size:1087328816  collection:"collection2"  file_count:14920  delete_count:3  deleted_byte_count:522994  replica_placement:100  version:3  modified_at_second:1614861255
+          volume id:255  size:1079581640  collection:"collection2"  file_count:14877  delete_count:3  deleted_byte_count:101223  replica_placement:100  version:3  modified_at_second:1614861233
+          volume id:256  size:1074283592  collection:"collection2"  file_count:14157  delete_count:1  deleted_byte_count:18156  replica_placement:100  version:3  modified_at_second:1614861100
+          volume id:258  size:1075527216  collection:"collection2"  file_count:18421  delete_count:4  deleted_byte_count:267833  replica_placement:100  version:3  modified_at_second:1614866420
+          volume id:259  size:1075507776  collection:"collection2"  file_count:18079  delete_count:2  deleted_byte_count:71992  replica_placement:100  version:3  modified_at_second:1614866381
+          volume id:264  size:1081624192  collection:"collection2"  file_count:21151  replica_placement:100  version:3  modified_at_second:1614871629
+          volume id:265  size:1076401104  collection:"collection2"  file_count:19932  delete_count:2  deleted_byte_count:160823  replica_placement:100  version:3  modified_at_second:1615629130
+          volume id:266  size:1075617464  collection:"collection2"  file_count:20075  delete_count:1  deleted_byte_count:1039  replica_placement:100  version:3  modified_at_second:1614871526
+          volume id:267  size:1075699544  collection:"collection2"  file_count:21039  delete_count:3  deleted_byte_count:59956  replica_placement:100  version:3  modified_at_second:1614877294
+          volume id:268  size:1074490592  collection:"collection2"  file_count:21698  delete_count:1  deleted_byte_count:33968  replica_placement:100  version:3  modified_at_second:1614877434
+          volume id:269  size:1077552872  collection:"collection2"  file_count:21875  delete_count:4  deleted_byte_count:347272  replica_placement:100  version:3  modified_at_second:1614877481
+          volume id:270  size:1076876568  collection:"collection2"  file_count:22057  delete_count:1  deleted_byte_count:43916  replica_placement:100  version:3  modified_at_second:1614877469
+          volume id:275  size:1078349024  collection:"collection2"  file_count:20808  delete_count:1  deleted_byte_count:1118  replica_placement:100  version:3  modified_at_second:1614884147
+          volume id:277  size:1074956288  collection:"collection2"  file_count:19260  delete_count:2  deleted_byte_count:172356  replica_placement:100  version:3  modified_at_second:1614889988
+          volume id:278  size:1078798640  collection:"collection2"  file_count:20597  delete_count:5  deleted_byte_count:400060  replica_placement:100  version:3  modified_at_second:1614890292
+          volume id:279  size:1077325040  collection:"collection2"  file_count:19671  delete_count:6  deleted_byte_count:379116  replica_placement:100  version:3  modified_at_second:1614890229
+          volume id:280  size:1077432216  collection:"collection2"  file_count:20286  delete_count:1  deleted_byte_count:879  replica_placement:100  version:3  modified_at_second:1614890262
+          volume id:281  size:1077581096  collection:"collection2"  file_count:20206  delete_count:3  deleted_byte_count:143964  replica_placement:100  version:3  modified_at_second:1614890237
+          volume id:284  size:1074533384  collection:"collection2"  file_count:22196  delete_count:4  deleted_byte_count:154683  replica_placement:100  version:3  modified_at_second:1614897231
+          volume id:285  size:1082128688  collection:"collection2"  file_count:21804  delete_count:1  deleted_byte_count:1064  replica_placement:100  version:3  modified_at_second:1614897165
+          volume id:289  size:1075284256  collection:"collection2"  file_count:29342  delete_count:5  deleted_byte_count:100454  replica_placement:100  version:3  modified_at_second:1614904977
+          volume id:290  size:1074723792  collection:"collection2"  file_count:28340  delete_count:4  deleted_byte_count:199064  replica_placement:100  version:3  modified_at_second:1614904924
+          volume id:291  size:1076256768  collection:"collection2"  file_count:28301  delete_count:5  deleted_byte_count:116027  replica_placement:100  version:3  modified_at_second:1614904924
+          volume id:293  size:1075409792  collection:"collection2"  file_count:26063  delete_count:4  deleted_byte_count:183834  replica_placement:100  version:3  modified_at_second:1614912235
+          volume id:294  size:1075444048  collection:"collection2"  file_count:26076  delete_count:4  deleted_byte_count:194914  replica_placement:100  version:3  modified_at_second:1614912220
+          volume id:296  size:1077824032  collection:"collection2"  file_count:26741  delete_count:4  deleted_byte_count:199906  replica_placement:100  version:3  modified_at_second:1614912301
+          volume id:297  size:1080229136  collection:"collection2"  file_count:23409  delete_count:5  deleted_byte_count:46268  replica_placement:100  version:3  modified_at_second:1614918481
+          volume id:298  size:1075410136  collection:"collection2"  file_count:23222  delete_count:2  deleted_byte_count:46110  replica_placement:100  version:3  modified_at_second:1614918474
+          volume id:299  size:1075147936  collection:"collection2"  file_count:22927  delete_count:4  deleted_byte_count:345569  replica_placement:100  version:3  modified_at_second:1614918455
+          volume id:300  size:1076212392  collection:"collection2"  file_count:22892  delete_count:2  deleted_byte_count:61320  replica_placement:100  version:3  modified_at_second:1614918464
+          volume id:301  size:1074655600  collection:"collection2"  file_count:22543  delete_count:6  deleted_byte_count:136968  replica_placement:100  version:3  modified_at_second:1614918378
+          volume id:303  size:1075944480  collection:"collection2"  file_count:22541  delete_count:2  deleted_byte_count:13617  replica_placement:100  version:3  modified_at_second:1614925431
+          volume id:306  size:1074764016  collection:"collection2"  file_count:22939  replica_placement:100  version:3  modified_at_second:1614925462
+          volume id:307  size:1076568000  collection:"collection2"  file_count:23377  delete_count:2  deleted_byte_count:25453  replica_placement:100  version:3  modified_at_second:1614931448
+          volume id:308  size:1074022392  collection:"collection2"  file_count:23086  delete_count:2  deleted_byte_count:2127  replica_placement:100  version:3  modified_at_second:1614931401
+          volume id:309  size:1075178664  collection:"collection2"  file_count:22692  delete_count:3  deleted_byte_count:171124  replica_placement:100  version:3  modified_at_second:1614931409
+          volume id:310  size:1074761528  collection:"collection2"  file_count:21441  delete_count:3  deleted_byte_count:13934  replica_placement:100  version:3  modified_at_second:1614931077
+          volume id:314  size:1074670840  collection:"collection2"  file_count:20964  delete_count:4  deleted_byte_count:304291  replica_placement:100  version:3  modified_at_second:1614937441
+          volume id:315  size:1084153544  collection:"collection2"  file_count:23638  delete_count:2  deleted_byte_count:53956  replica_placement:100  version:3  modified_at_second:1614937885
+          volume id:317  size:1076215096  collection:"collection2"  file_count:23572  delete_count:2  deleted_byte_count:1441356  replica_placement:100  version:3  modified_at_second:1614943965
+          volume id:318  size:1075965168  collection:"collection2"  file_count:22459  delete_count:2  deleted_byte_count:37778  replica_placement:100  version:3  modified_at_second:1614943862
+          volume id:319  size:1073952880  collection:"collection2"  file_count:22286  delete_count:2  deleted_byte_count:43421  replica_placement:100  version:3  modified_at_second:1614943810
+          volume id:320  size:1082437792  collection:"collection2"  file_count:21544  delete_count:3  deleted_byte_count:16712  replica_placement:100  version:3  modified_at_second:1614943599
+          volume id:321  size:1081477904  collection:"collection2"  file_count:23531  delete_count:5  deleted_byte_count:262564  replica_placement:100  version:3  modified_at_second:1614943982
+          volume id:324  size:1075606680  collection:"collection2"  file_count:20799  delete_count:1  deleted_byte_count:251210  replica_placement:100  version:3  modified_at_second:1614950310
+          volume id:325  size:1080701144  collection:"collection2"  file_count:21735  replica_placement:100  version:3  modified_at_second:1614950525
+          volume id:330  size:1080825832  collection:"collection2"  file_count:22464  delete_count:2  deleted_byte_count:15771  replica_placement:100  version:3  modified_at_second:1614956477
+          volume id:332  size:1075569928  collection:"collection2"  file_count:22097  delete_count:3  deleted_byte_count:98273  replica_placement:100  version:3  modified_at_second:1614962869
+          volume id:334  size:1075607880  collection:"collection2"  file_count:22546  delete_count:6  deleted_byte_count:101538  replica_placement:100  version:3  modified_at_second:1614962978
+          volume id:336  size:1087853056  collection:"collection2"  file_count:22801  delete_count:2  deleted_byte_count:26394  replica_placement:100  version:3  modified_at_second:1614963005
+          volume id:337  size:1075646784  collection:"collection2"  file_count:21934  delete_count:1  deleted_byte_count:3397  replica_placement:100  version:3  modified_at_second:1614969937
+          volume id:338  size:1076118304  collection:"collection2"  file_count:21680  replica_placement:100  version:3  modified_at_second:1614969850
+          volume id:340  size:1079462184  collection:"collection2"  file_count:22319  delete_count:4  deleted_byte_count:93620  replica_placement:100  version:3  modified_at_second:1614969978
+          volume id:341  size:1074448400  collection:"collection2"  file_count:21590  delete_count:5  deleted_byte_count:160085  replica_placement:100  version:3  modified_at_second:1614969858
+          volume id:342  size:1080186424  collection:"collection2"  file_count:22405  delete_count:4  deleted_byte_count:64819  replica_placement:100  version:3  modified_at_second:1614977521
+          volume id:344  size:1075035416  collection:"collection2"  file_count:21765  delete_count:1  deleted_byte_count:24623  replica_placement:100  version:3  modified_at_second:1614977465
+          volume id:345  size:1074560760  collection:"collection2"  file_count:22117  delete_count:2  deleted_byte_count:373286  replica_placement:100  version:3  modified_at_second:1614977457
+          volume id:346  size:1076464112  collection:"collection2"  file_count:22320  delete_count:4  deleted_byte_count:798258  replica_placement:100  version:3  modified_at_second:1615631322
+          volume id:348  size:1080623640  collection:"collection2"  file_count:21667  delete_count:1  deleted_byte_count:2443  replica_placement:100  version:3  modified_at_second:1614984606
+          volume id:350  size:1074756688  collection:"collection2"  file_count:21990  delete_count:3  deleted_byte_count:233881  replica_placement:100  version:3  modified_at_second:1614984682
+          volume id:351  size:1078795112  collection:"collection2"  file_count:23660  delete_count:3  deleted_byte_count:102141  replica_placement:100  version:3  modified_at_second:1614984816
+          volume id:352  size:1077145936  collection:"collection2"  file_count:22066  delete_count:1  deleted_byte_count:1018  replica_placement:100  version:3  modified_at_second:1614992130
+          volume id:353  size:1074897496  collection:"collection2"  file_count:21266  delete_count:2  deleted_byte_count:3105374  replica_placement:100  version:3  modified_at_second:1614991951
+          volume id:355  size:1075239728  collection:"collection2"  file_count:22244  delete_count:1  deleted_byte_count:23282  replica_placement:100  version:3  modified_at_second:1614992157
+          volume id:356  size:1083305048  collection:"collection2"  file_count:21552  delete_count:4  deleted_byte_count:14472  replica_placement:100  version:3  modified_at_second:1614992028
+          volume id:358  size:1085152368  collection:"collection2"  file_count:23756  delete_count:3  deleted_byte_count:44531  replica_placement:100  version:3  modified_at_second:1614998824
+          volume id:360  size:1075532456  collection:"collection2"  file_count:22574  delete_count:3  deleted_byte_count:1774776  replica_placement:100  version:3  modified_at_second:1614998770
+          volume id:361  size:1075362744  collection:"collection2"  file_count:22272  delete_count:1  deleted_byte_count:3497  replica_placement:100  version:3  modified_at_second:1614998668
+          volume id:375  size:1076140568  collection:"collection2"  file_count:21880  delete_count:2  deleted_byte_count:51103  replica_placement:100  version:3  modified_at_second:1615016787
+          volume id:376  size:1074845944  collection:"collection2"  file_count:22908  delete_count:4  deleted_byte_count:432305  replica_placement:100  version:3  modified_at_second:1615016916
+          volume id:377  size:957284144  collection:"collection2"  file_count:14923  delete_count:1  deleted_byte_count:1797  replica_placement:100  version:3  modified_at_second:1615632323
+          volume id:378  size:959273936  collection:"collection2"  file_count:15027  delete_count:4  deleted_byte_count:231414  replica_placement:100  version:3  modified_at_second:1615632323
+          volume id:381  size:939261032  collection:"collection2"  file_count:14615  delete_count:5  deleted_byte_count:1192272  replica_placement:100  version:3  modified_at_second:1615632324
+        Disk hdd total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585
+      DataNode 192.168.1.6:8080 total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585
+    Rack rack3 total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585
+  DataCenter dc3 total size:111617646696 file_count:1762773 deleted_file:1221 deleted_bytes:398484585
+  DataCenter dc4 hdd(volume:267/2000 active:267 free:1733 remote:0)
+    Rack DefaultRack hdd(volume:267/2000 active:267 free:1733 remote:0)
+      DataNode 192.168.1.1:8080 hdd(volume:267/2000 active:267 free:1733 remote:0)
+        Disk hdd(volume:267/2000 active:267 free:1733 remote:0)
+          volume id:1  size:284693256  file_count:1558  delete_count:2  deleted_byte_count:4818  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632062
+          volume id:2  size:289228560  file_count:1640  delete_count:4  deleted_byte_count:464508  replica_placement:100  version:3  compact_revision:6  modified_at_second:1615630622
+          volume id:3  size:308741952  file_count:1637  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632242
+          volume id:4  size:285986968  file_count:1640  delete_count:1  deleted_byte_count:145095  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632302
+          volume id:5  size:293806008  file_count:1669  delete_count:2  deleted_byte_count:274334  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631342
+          volume id:6  size:302411024  file_count:1604  delete_count:2  deleted_byte_count:274587  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631402
+          volume id:7  size:1924728  collection:"collection4"  file_count:15  replica_placement:100  version:3  modified_at_second:1609331040
+          volume id:9  size:77337416  collection:"collection3"  file_count:58  replica_placement:100  version:3  ttl:772  modified_at_second:1615513762
+          volume id:10  size:1212784656  collection:"collection0"  file_count:58  replica_placement:100  version:3  modified_at_second:1609814543
+          volume id:11  size:1109224552  collection:"collection0"  file_count:44  replica_placement:100  version:3  modified_at_second:1609815123
+          volume id:12  size:1110923848  collection:"collection0"  file_count:45  replica_placement:100  version:3  modified_at_second:1609819726
+          volume id:13  size:1184910656  collection:"collection0"  file_count:47  replica_placement:100  version:3  modified_at_second:1609827832
+          volume id:14  size:1107475720  collection:"collection0"  file_count:80  delete_count:3  deleted_byte_count:6870  replica_placement:100  version:3  modified_at_second:1612956983
+          volume id:15  size:1115965160  collection:"collection0"  file_count:83  delete_count:3  deleted_byte_count:4956  replica_placement:100  version:3  modified_at_second:1612957001
+          volume id:16  size:1113666048  collection:"collection0"  file_count:73  delete_count:5  deleted_byte_count:6318  replica_placement:100  version:3  modified_at_second:1612957007
+          volume id:17  size:1095115800  collection:"collection0"  file_count:83  delete_count:3  deleted_byte_count:7099  replica_placement:100  version:3  modified_at_second:1612957000
+          volume id:18  size:1096678688  collection:"collection0"  file_count:88  delete_count:4  deleted_byte_count:8633  replica_placement:100  version:3  modified_at_second:1612957000
+          volume id:19  size:1096923792  collection:"collection0"  file_count:100  delete_count:10  deleted_byte_count:75779917  replica_placement:100  version:3  compact_revision:4  modified_at_second:1612957011
+          volume id:20  size:1074760432  collection:"collection0"  file_count:82  delete_count:5  deleted_byte_count:12156  replica_placement:100  version:3  compact_revision:2  modified_at_second:1612957011
+          volume id:22  size:1086828368  collection:"collection0"  file_count:75  delete_count:3  deleted_byte_count:5551  replica_placement:100  version:3  modified_at_second:1612957007
+          volume id:23  size:1076380280  collection:"collection0"  file_count:68  delete_count:2  deleted_byte_count:2910  replica_placement:100  version:3  modified_at_second:1612957011
+          volume id:24  size:1074139808  collection:"collection0"  file_count:90  delete_count:1  deleted_byte_count:1977  replica_placement:100  version:3  modified_at_second:1612957011
+          volume id:25  size:690757544  collection:"collection0"  file_count:38  delete_count:1  deleted_byte_count:1944  replica_placement:100  version:3  modified_at_second:1612956995
+          volume id:26  size:532657632  collection:"collection0"  file_count:100  delete_count:4  deleted_byte_count:9081  replica_placement:100  version:3  modified_at_second:1614170023
+          volume id:34  size:1077111136  collection:"collection1"  file_count:9781  delete_count:110  deleted_byte_count:20894827  replica_placement:100  version:3  modified_at_second:1615619366
+          volume id:35  size:1075241656  collection:"collection1"  file_count:10523  delete_count:96  deleted_byte_count:46618989  replica_placement:100  version:3  modified_at_second:1615618790
+          volume id:36  size:1075118360  collection:"collection1"  file_count:10342  delete_count:116  deleted_byte_count:25493106  replica_placement:100  version:3  modified_at_second:1615606148
+          volume id:37  size:1075895584  collection:"collection1"  file_count:12013  delete_count:98  deleted_byte_count:50747932  replica_placement:100  version:3  modified_at_second:1615594777
+          volume id:39  size:1076606536  collection:"collection1"  file_count:12612  delete_count:78  deleted_byte_count:17462730  replica_placement:100  version:3  modified_at_second:1615611959
+          volume id:40  size:1075358552  collection:"collection1"  file_count:12597  delete_count:62  deleted_byte_count:11657901  replica_placement:100  version:3  modified_at_second:1615612994
+          volume id:41  size:1076283528  collection:"collection1"  file_count:12088  delete_count:84  deleted_byte_count:19319268  replica_placement:100  version:3  modified_at_second:1615596736
+          volume id:42  size:1093948352  collection:"collection1"  file_count:7889  delete_count:47  deleted_byte_count:5697275  replica_placement:100  version:3  modified_at_second:1615548908
+          volume id:43  size:1116445864  collection:"collection1"  file_count:7358  delete_count:54  deleted_byte_count:9534379  replica_placement:100  version:3  modified_at_second:1615566170
+          volume id:44  size:1077582560  collection:"collection1"  file_count:7295  delete_count:50  deleted_byte_count:12618414  replica_placement:100  version:3  modified_at_second:1615566170
+          volume id:45  size:1075254640  collection:"collection1"  file_count:10772  delete_count:76  deleted_byte_count:22426345  replica_placement:100  version:3  modified_at_second:1615573499
+          volume id:46  size:1075286056  collection:"collection1"  file_count:9947  delete_count:309  deleted_byte_count:105601163  replica_placement:100  version:3  modified_at_second:1615569826
+          volume id:48  size:1076778720  collection:"collection1"  file_count:9850  delete_count:77  deleted_byte_count:16641907  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630690
+          volume id:50  size:1076688224  collection:"collection1"  file_count:7921  delete_count:26  deleted_byte_count:5162032  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615610879
+          volume id:52  size:1083529704  collection:"collection1"  file_count:10128  delete_count:32  deleted_byte_count:10608391  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615599195
+          volume id:53  size:1063089216  collection:"collection1"  file_count:9832  delete_count:31  deleted_byte_count:9273066  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632156
+          volume id:55  size:1012890016  collection:"collection1"  file_count:8651  delete_count:27  deleted_byte_count:9418841  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631452
+          volume id:57  size:839849792  collection:"collection1"  file_count:7514  delete_count:24  deleted_byte_count:6228543  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631774
+          volume id:58  size:908064200  collection:"collection1"  file_count:8128  delete_count:21  deleted_byte_count:6113731  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632342
+          volume id:59  size:988302272  collection:"collection1"  file_count:8098  delete_count:20  deleted_byte_count:3947615  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632238
+          volume id:60  size:1010702480  collection:"collection1"  file_count:8969  delete_count:79  deleted_byte_count:24782814  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632439
+          volume id:61  size:975604488  collection:"collection1"  file_count:8683  delete_count:20  deleted_byte_count:10276072  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615631176
+          volume id:62  size:873845936  collection:"collection1"  file_count:7897  delete_count:23  deleted_byte_count:10920170  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631133
+          volume id:64  size:965638488  collection:"collection1"  file_count:8218  delete_count:27  deleted_byte_count:6922489  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631031
+          volume id:65  size:823283552  collection:"collection1"  file_count:7834  delete_count:29  deleted_byte_count:5950610  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632306
+          volume id:66  size:821343440  collection:"collection1"  file_count:7383  delete_count:29  deleted_byte_count:12010343  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631968
+          volume id:67  size:878713872  collection:"collection1"  file_count:7299  delete_count:117  deleted_byte_count:24857326  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632156
+          volume id:68  size:898630584  collection:"collection1"  file_count:6934  delete_count:95  deleted_byte_count:27460707  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632284
+          volume id:70  size:886695472  collection:"collection1"  file_count:7769  delete_count:164  deleted_byte_count:45162513  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632398
+          volume id:71  size:907608392  collection:"collection1"  file_count:7658  delete_count:122  deleted_byte_count:27622941  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632307
+          volume id:72  size:903990720  collection:"collection1"  file_count:6996  delete_count:240  deleted_byte_count:74147727  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630982
+          volume id:73  size:929047664  collection:"collection1"  file_count:7038  delete_count:227  deleted_byte_count:65336664  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630707
+          volume id:74  size:957046128  collection:"collection1"  file_count:6981  delete_count:259  deleted_byte_count:73080838  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615631460
+          volume id:75  size:908044992  collection:"collection1"  file_count:6911  delete_count:268  deleted_byte_count:73934373  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632430
+          volume id:76  size:985296744  collection:"collection1"  file_count:6566  delete_count:61  deleted_byte_count:44464430  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632284
+          volume id:77  size:929398296  collection:"collection1"  file_count:7427  delete_count:238  deleted_byte_count:59581579  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632013
+          volume id:78  size:1075671512  collection:"collection1"  file_count:7540  delete_count:258  deleted_byte_count:71726846  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615582829
+          volume id:79  size:948225472  collection:"collection1"  file_count:6997  delete_count:227  deleted_byte_count:60625763  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631326
+          volume id:82  size:1041661800  collection:"collection1"  file_count:7043  delete_count:207  deleted_byte_count:52275724  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632430
+          volume id:83  size:936195856  collection:"collection1"  file_count:7593  delete_count:13  deleted_byte_count:4633917  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632029
+          volume id:85  size:1023867520  collection:"collection1"  file_count:7787  delete_count:240  deleted_byte_count:82091742  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631723
+          volume id:86  size:1009437488  collection:"collection1"  file_count:8474  delete_count:236  deleted_byte_count:64543674  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630812
+          volume id:87  size:922276640  collection:"collection1"  file_count:12902  delete_count:13  deleted_byte_count:3412959  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632438
+          volume id:89  size:1044401976  collection:"collection1"  file_count:14943  delete_count:243  deleted_byte_count:58543159  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632208
+          volume id:90  size:891145784  collection:"collection1"  file_count:14608  delete_count:10  deleted_byte_count:2564369  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615629390
+          volume id:91  size:936572832  collection:"collection1"  file_count:14686  delete_count:11  deleted_byte_count:4717727  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631851
+          volume id:92  size:992440712  collection:"collection1"  file_count:7061  delete_count:195  deleted_byte_count:60649573  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630566
+          volume id:93  size:1079603768  collection:"collection1"  file_count:7878  delete_count:270  deleted_byte_count:74150048  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615556015
+          volume id:94  size:1030685824  collection:"collection1"  file_count:7660  delete_count:207  deleted_byte_count:70150733  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631616
+          volume id:95  size:990879168  collection:"collection1"  file_count:6620  delete_count:206  deleted_byte_count:60363604  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615631866
+          volume id:96  size:989296136  collection:"collection1"  file_count:7544  delete_count:229  deleted_byte_count:59931853  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630778
+          volume id:97  size:1053112992  collection:"collection1"  file_count:6789  delete_count:50  deleted_byte_count:38894001  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631194
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+          volume id:251  size:1075684408  collection:"collection2"  file_count:10847  replica_placement:100  version:3  modified_at_second:1614856270
+          volume id:254  size:1074830800  collection:"collection2"  file_count:14140  delete_count:2  deleted_byte_count:105892  replica_placement:100  version:3  modified_at_second:1614861115
+          volume id:257  size:1082621664  collection:"collection2"  file_count:18172  delete_count:2  deleted_byte_count:25125  replica_placement:100  version:3  modified_at_second:1614866395
+          volume id:260  size:1075105664  collection:"collection2"  file_count:17316  delete_count:4  deleted_byte_count:2015310  replica_placement:100  version:3  modified_at_second:1614866226
+          volume id:261  size:1076628592  collection:"collection2"  file_count:18355  delete_count:1  deleted_byte_count:1155  replica_placement:100  version:3  modified_at_second:1614866420
+          volume id:262  size:1078492464  collection:"collection2"  file_count:20390  delete_count:3  deleted_byte_count:287601  replica_placement:100  version:3  modified_at_second:1614871601
+          volume id:263  size:1077167440  collection:"collection2"  file_count:20227  delete_count:4  deleted_byte_count:97887  replica_placement:100  version:3  modified_at_second:1614871567
+          volume id:268  size:1074490592  collection:"collection2"  file_count:21698  delete_count:1  deleted_byte_count:33968  replica_placement:100  version:3  modified_at_second:1614877435
+          volume id:269  size:1077552720  collection:"collection2"  file_count:21875  delete_count:4  deleted_byte_count:347272  replica_placement:100  version:3  modified_at_second:1614877481
+          volume id:271  size:1076992648  collection:"collection2"  file_count:22640  delete_count:1  deleted_byte_count:30645  replica_placement:100  version:3  modified_at_second:1614877504
+          volume id:273  size:1074873432  collection:"collection2"  file_count:20511  delete_count:3  deleted_byte_count:46076  replica_placement:100  version:3  modified_at_second:1614884046
+          volume id:274  size:1075994128  collection:"collection2"  file_count:20997  replica_placement:100  version:3  modified_at_second:1614884113
+          volume id:276  size:1076899888  collection:"collection2"  file_count:20190  delete_count:1  deleted_byte_count:8798  replica_placement:100  version:3  modified_at_second:1614884003
+          volume id:277  size:1074956160  collection:"collection2"  file_count:19260  delete_count:2  deleted_byte_count:172356  replica_placement:100  version:3  modified_at_second:1614889988
+          volume id:279  size:1077325096  collection:"collection2"  file_count:19671  delete_count:6  deleted_byte_count:379116  replica_placement:100  version:3  modified_at_second:1614890230
+          volume id:282  size:1075232240  collection:"collection2"  file_count:22659  delete_count:4  deleted_byte_count:67915  replica_placement:100  version:3  modified_at_second:1614897304
+          volume id:284  size:1074533384  collection:"collection2"  file_count:22196  delete_count:4  deleted_byte_count:154683  replica_placement:100  version:3  modified_at_second:1614897231
+          volume id:285  size:1082128576  collection:"collection2"  file_count:21804  delete_count:1  deleted_byte_count:1064  replica_placement:100  version:3  modified_at_second:1614897165
+          volume id:286  size:1077464824  collection:"collection2"  file_count:23905  delete_count:6  deleted_byte_count:630577  replica_placement:100  version:3  modified_at_second:1614897401
+          volume id:287  size:1074590528  collection:"collection2"  file_count:28163  delete_count:5  deleted_byte_count:35727  replica_placement:100  version:3  modified_at_second:1614904874
+          volume id:288  size:1075406800  collection:"collection2"  file_count:27243  delete_count:2  deleted_byte_count:51519  replica_placement:100  version:3  modified_at_second:1614904738
+          volume id:292  size:1092010744  collection:"collection2"  file_count:26781  delete_count:5  deleted_byte_count:508910  replica_placement:100  version:3  modified_at_second:1614912327
+          volume id:293  size:1075409776  collection:"collection2"  file_count:26063  delete_count:4  deleted_byte_count:183834  replica_placement:100  version:3  modified_at_second:1614912235
+          volume id:294  size:1075443992  collection:"collection2"  file_count:26076  delete_count:4  deleted_byte_count:194914  replica_placement:100  version:3  modified_at_second:1614912220
+          volume id:295  size:1074702376  collection:"collection2"  file_count:24488  delete_count:3  deleted_byte_count:48555  replica_placement:100  version:3  modified_at_second:1614911929
+          volume id:300  size:1076212424  collection:"collection2"  file_count:22892  delete_count:2  deleted_byte_count:61320  replica_placement:100  version:3  modified_at_second:1614918464
+          volume id:304  size:1081038888  collection:"collection2"  file_count:24505  delete_count:2  deleted_byte_count:124447  replica_placement:100  version:3  modified_at_second:1614925567
+          volume id:305  size:1074185552  collection:"collection2"  file_count:22074  delete_count:5  deleted_byte_count:20221  replica_placement:100  version:3  modified_at_second:1614925312
+          volume id:310  size:1074761520  collection:"collection2"  file_count:21441  delete_count:3  deleted_byte_count:13934  replica_placement:100  version:3  modified_at_second:1614931077
+          volume id:311  size:1088248208  collection:"collection2"  file_count:23553  delete_count:6  deleted_byte_count:191716  replica_placement:100  version:3  modified_at_second:1614931460
+          volume id:312  size:1075037808  collection:"collection2"  file_count:22524  replica_placement:100  version:3  modified_at_second:1614937832
+          volume id:313  size:1074876016  collection:"collection2"  file_count:22404  delete_count:4  deleted_byte_count:51728  replica_placement:100  version:3  modified_at_second:1614937755
+          volume id:314  size:1074670840  collection:"collection2"  file_count:20964  delete_count:4  deleted_byte_count:304291  replica_placement:100  version:3  modified_at_second:1614937441
+          volume id:315  size:1084153456  collection:"collection2"  file_count:23638  delete_count:2  deleted_byte_count:53956  replica_placement:100  version:3  modified_at_second:1614937884
+          volume id:316  size:1077720784  collection:"collection2"  file_count:22605  delete_count:1  deleted_byte_count:8503  replica_placement:100  version:3  modified_at_second:1614937838
+          volume id:317  size:1076215040  collection:"collection2"  file_count:23572  delete_count:2  deleted_byte_count:1441356  replica_placement:100  version:3  modified_at_second:1614943965
+          volume id:319  size:1073952744  collection:"collection2"  file_count:22286  delete_count:2  deleted_byte_count:43421  replica_placement:100  version:3  modified_at_second:1614943810
+          volume id:320  size:1082437736  collection:"collection2"  file_count:21544  delete_count:3  deleted_byte_count:16712  replica_placement:100  version:3  modified_at_second:1614943591
+          volume id:321  size:1081477960  collection:"collection2"  file_count:23531  delete_count:5  deleted_byte_count:262564  replica_placement:100  version:3  modified_at_second:1614943982
+          volume id:322  size:1078471600  collection:"collection2"  file_count:21905  delete_count:3  deleted_byte_count:145002  replica_placement:100  version:3  modified_at_second:1614950574
+          volume id:324  size:1075606712  collection:"collection2"  file_count:20799  delete_count:1  deleted_byte_count:251210  replica_placement:100  version:3  modified_at_second:1614950310
+          volume id:326  size:1076059936  collection:"collection2"  file_count:22564  delete_count:2  deleted_byte_count:192886  replica_placement:100  version:3  modified_at_second:1614950619
+          volume id:327  size:1076121224  collection:"collection2"  file_count:22007  delete_count:3  deleted_byte_count:60358  replica_placement:100  version:3  modified_at_second:1614956487
+          volume id:328  size:1074767928  collection:"collection2"  file_count:21720  delete_count:3  deleted_byte_count:56429  replica_placement:100  version:3  modified_at_second:1614956362
+          volume id:329  size:1076691776  collection:"collection2"  file_count:22411  delete_count:5  deleted_byte_count:214092  replica_placement:100  version:3  modified_at_second:1614956485
+          volume id:331  size:1074957192  collection:"collection2"  file_count:21230  delete_count:4  deleted_byte_count:62145  replica_placement:100  version:3  modified_at_second:1614956259
+          volume id:333  size:1074270192  collection:"collection2"  file_count:21271  delete_count:2  deleted_byte_count:168122  replica_placement:100  version:3  modified_at_second:1614962697
+          volume id:335  size:1076235176  collection:"collection2"  file_count:22391  delete_count:3  deleted_byte_count:8838  replica_placement:100  version:3  modified_at_second:1614962970
+          volume id:336  size:1087853032  collection:"collection2"  file_count:22801  delete_count:2  deleted_byte_count:26394  replica_placement:100  version:3  modified_at_second:1614963003
+          volume id:338  size:1076118360  collection:"collection2"  file_count:21680  replica_placement:100  version:3  modified_at_second:1614969850
+          volume id:342  size:1080186296  collection:"collection2"  file_count:22405  delete_count:4  deleted_byte_count:64819  replica_placement:100  version:3  modified_at_second:1614977518
+          volume id:343  size:1075345184  collection:"collection2"  file_count:21095  delete_count:2  deleted_byte_count:20581  replica_placement:100  version:3  modified_at_second:1614977148
+          volume id:349  size:1075957824  collection:"collection2"  file_count:22395  delete_count:2  deleted_byte_count:61565  replica_placement:100  version:3  modified_at_second:1614984748
+          volume id:350  size:1074756688  collection:"collection2"  file_count:21990  delete_count:3  deleted_byte_count:233881  replica_placement:100  version:3  modified_at_second:1614984682
+          volume id:354  size:1085213992  collection:"collection2"  file_count:23150  delete_count:4  deleted_byte_count:82391  replica_placement:100  version:3  modified_at_second:1614992207
+          volume id:356  size:1083304992  collection:"collection2"  file_count:21552  delete_count:4  deleted_byte_count:14472  replica_placement:100  version:3  modified_at_second:1614992027
+          volume id:358  size:1085152312  collection:"collection2"  file_count:23756  delete_count:3  deleted_byte_count:44531  replica_placement:100  version:3  modified_at_second:1614998824
+          volume id:359  size:1074211240  collection:"collection2"  file_count:22437  delete_count:2  deleted_byte_count:187953  replica_placement:100  version:3  modified_at_second:1614998711
+          volume id:362  size:1074074120  collection:"collection2"  file_count:20595  delete_count:1  deleted_byte_count:112145  replica_placement:100  version:3  modified_at_second:1615004407
+          volume id:363  size:1078859496  collection:"collection2"  file_count:23177  delete_count:4  deleted_byte_count:9601  replica_placement:100  version:3  modified_at_second:1615004822
+          volume id:364  size:1081280816  collection:"collection2"  file_count:22686  delete_count:1  deleted_byte_count:84375  replica_placement:100  version:3  modified_at_second:1615004813
+          volume id:365  size:1075736632  collection:"collection2"  file_count:22193  delete_count:5  deleted_byte_count:259033  replica_placement:100  version:3  modified_at_second:1615004776
+          volume id:366  size:1075267272  collection:"collection2"  file_count:21856  delete_count:5  deleted_byte_count:138363  replica_placement:100  version:3  modified_at_second:1615004703
+          volume id:367  size:1076403648  collection:"collection2"  file_count:22995  delete_count:2  deleted_byte_count:36955  replica_placement:100  version:3  modified_at_second:1615010985
+          volume id:368  size:1074822016  collection:"collection2"  file_count:22252  delete_count:4  deleted_byte_count:3291946  replica_placement:100  version:3  modified_at_second:1615010878
+          volume id:369  size:1091472040  collection:"collection2"  file_count:23709  delete_count:4  deleted_byte_count:400876  replica_placement:100  version:3  modified_at_second:1615011019
+          volume id:370  size:1076040480  collection:"collection2"  file_count:22092  delete_count:2  deleted_byte_count:115388  replica_placement:100  version:3  modified_at_second:1615010877
+          volume id:371  size:1078806160  collection:"collection2"  file_count:22685  delete_count:2  deleted_byte_count:68905  replica_placement:100  version:3  modified_at_second:1615010994
+          volume id:372  size:1076193312  collection:"collection2"  file_count:22774  delete_count:1  deleted_byte_count:3495  replica_placement:100  version:3  modified_at_second:1615016911
+          volume id:374  size:1085011080  collection:"collection2"  file_count:23054  delete_count:2  deleted_byte_count:89034  replica_placement:100  version:3  modified_at_second:1615016917
+          volume id:375  size:1076140688  collection:"collection2"  file_count:21880  delete_count:2  deleted_byte_count:51103  replica_placement:100  version:3  modified_at_second:1615016787
+          volume id:378  size:959273824  collection:"collection2"  file_count:15031  replica_placement:100  version:3  modified_at_second:1615632323
+          volume id:379  size:1014108592  collection:"collection2"  file_count:15360  delete_count:8  deleted_byte_count:2524591  replica_placement:100  version:3  modified_at_second:1615632323
+          volume id:380  size:1010760464  collection:"collection2"  file_count:14920  delete_count:7  deleted_byte_count:134859  replica_placement:100  version:3  modified_at_second:1615632322
+        Disk hdd total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457
+      DataNode 192.168.1.1:8080 total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457
+    Rack DefaultRack total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457
+  DataCenter dc4 total size:274627838960 file_count:3607097 deleted_file:13594 deleted_bytes:4185524457
+  DataCenter dc5 hdd(volume:299/3000 active:299 free:2701 remote:0)
+    Rack DefaultRack hdd(volume:299/3000 active:299 free:2701 remote:0)
+      DataNode 192.168.1.5:8080 hdd(volume:299/3000 active:299 free:2701 remote:0)
+        Disk hdd(volume:299/3000 active:299 free:2701 remote:0)
+          volume id:5  size:293806008  file_count:1669  delete_count:2  deleted_byte_count:274334  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631342
+          volume id:11  size:1109224552  collection:"collection0"  file_count:44  replica_placement:100  version:3  modified_at_second:1615629606
+          volume id:18  size:1096678688  collection:"collection0"  file_count:88  delete_count:4  deleted_byte_count:8633  replica_placement:100  version:3  modified_at_second:1615631673
+          volume id:19  size:1096923792  collection:"collection0"  file_count:100  delete_count:10  deleted_byte_count:75779917  replica_placement:100  version:3  compact_revision:4  modified_at_second:1615630117
+          volume id:20  size:1074760432  collection:"collection0"  file_count:82  delete_count:5  deleted_byte_count:12156  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615629340
+          volume id:26  size:532657632  collection:"collection0"  file_count:100  delete_count:4  deleted_byte_count:9081  replica_placement:100  version:3  modified_at_second:1614170024
+          volume id:27  size:298886792  file_count:1608  replica_placement:100  version:3  modified_at_second:1615632482
+          volume id:28  size:308919192  file_count:1591  delete_count:1  deleted_byte_count:125280  replica_placement:100  version:3  modified_at_second:1615631762
+          volume id:29  size:281582688  file_count:1537  replica_placement:100  version:3  modified_at_second:1615629422
+          volume id:30  size:289466144  file_count:1566  delete_count:1  deleted_byte_count:124972  replica_placement:100  version:3  modified_at_second:1615632422
+          volume id:31  size:273363256  file_count:1498  replica_placement:100  version:3  modified_at_second:1615631642
+          volume id:32  size:281343360  file_count:1497  replica_placement:100  version:3  modified_at_second:1615632362
+          volume id:33  size:1130226344  collection:"collection1"  file_count:7322  delete_count:172  deleted_byte_count:45199399  replica_placement:100  version:3  modified_at_second:1615618789
+          volume id:34  size:1077111136  collection:"collection1"  file_count:9781  delete_count:110  deleted_byte_count:20894827  replica_placement:100  version:3  modified_at_second:1615619366
+          volume id:35  size:1075241744  collection:"collection1"  file_count:10523  delete_count:97  deleted_byte_count:46586217  replica_placement:100  version:3  modified_at_second:1615618790
+          volume id:36  size:1075118336  collection:"collection1"  file_count:10341  delete_count:118  deleted_byte_count:24753278  replica_placement:100  version:3  modified_at_second:1615606148
+          volume id:37  size:1075895576  collection:"collection1"  file_count:12013  delete_count:98  deleted_byte_count:50747932  replica_placement:100  version:3  modified_at_second:1615594776
+          volume id:38  size:1075545744  collection:"collection1"  file_count:13324  delete_count:100  deleted_byte_count:25223906  replica_placement:100  version:3  modified_at_second:1615569830
+          volume id:39  size:1076606536  collection:"collection1"  file_count:12612  delete_count:78  deleted_byte_count:17462730  replica_placement:100  version:3  modified_at_second:1615611959
+          volume id:40  size:1075358552  collection:"collection1"  file_count:12597  delete_count:62  deleted_byte_count:11657901  replica_placement:100  version:3  modified_at_second:1615612994
+          volume id:41  size:1076283592  collection:"collection1"  file_count:12088  delete_count:84  deleted_byte_count:19311237  replica_placement:100  version:3  modified_at_second:1615596736
+          volume id:42  size:1093948352  collection:"collection1"  file_count:7889  delete_count:47  deleted_byte_count:5697275  replica_placement:100  version:3  modified_at_second:1615548906
+          volume id:43  size:1116445864  collection:"collection1"  file_count:7355  delete_count:57  deleted_byte_count:9727158  replica_placement:100  version:3  modified_at_second:1615566167
+          volume id:44  size:1077582560  collection:"collection1"  file_count:7295  delete_count:50  deleted_byte_count:12618414  replica_placement:100  version:3  modified_at_second:1615566170
+          volume id:45  size:1075254640  collection:"collection1"  file_count:10772  delete_count:76  deleted_byte_count:22426345  replica_placement:100  version:3  modified_at_second:1615573498
+          volume id:46  size:1075286056  collection:"collection1"  file_count:9947  delete_count:309  deleted_byte_count:105601163  replica_placement:100  version:3  modified_at_second:1615569825
+          volume id:47  size:444599784  collection:"collection1"  file_count:709  delete_count:19  deleted_byte_count:11913451  replica_placement:100  version:3  modified_at_second:1615632397
+          volume id:48  size:1076778664  collection:"collection1"  file_count:9850  delete_count:77  deleted_byte_count:16641907  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615630690
+          volume id:49  size:1078775288  collection:"collection1"  file_count:9631  delete_count:27  deleted_byte_count:5985628  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615575823
+          volume id:50  size:1076688288  collection:"collection1"  file_count:7921  delete_count:26  deleted_byte_count:5162032  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615610876
+          volume id:51  size:1076796120  collection:"collection1"  file_count:10550  delete_count:39  deleted_byte_count:12723654  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615547786
+          volume id:53  size:1063089216  collection:"collection1"  file_count:9832  delete_count:31  deleted_byte_count:9273066  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632156
+          volume id:54  size:1045022288  collection:"collection1"  file_count:9409  delete_count:29  deleted_byte_count:15102818  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615630813
+          volume id:55  size:1012890016  collection:"collection1"  file_count:8651  delete_count:27  deleted_byte_count:9418841  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631453
+          volume id:56  size:1002412240  collection:"collection1"  file_count:8762  delete_count:40  deleted_byte_count:65885831  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632014
+          volume id:57  size:839849792  collection:"collection1"  file_count:7514  delete_count:24  deleted_byte_count:6228543  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615631775
+          volume id:58  size:908064192  collection:"collection1"  file_count:8128  delete_count:21  deleted_byte_count:6113731  replica_placement:100  version:3  compact_revision:3  modified_at_second:1615632343
+          volume id:59  size:988302272  collection:"collection1"  file_count:8098  delete_count:20  deleted_byte_count:3947615  replica_placement:100  version:3  compact_revision:2  modified_at_second:1615632238
+          volume id:60  size:1010702480  collection:"collection1"  file_count:8969  delete_count:79  deleted_byte_count:24782814  replica_placement:100  version:3  compact_revision:1  modified_at_second:1615632439
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+          volume id:341  size:1074448360  collection:"collection2"  file_count:21590  delete_count:5  deleted_byte_count:160085  replica_placement:100  version:3  modified_at_second:1614969858
+          volume id:343  size:1075345072  collection:"collection2"  file_count:21095  delete_count:2  deleted_byte_count:20581  replica_placement:100  version:3  modified_at_second:1614977148
+          volume id:346  size:1076464112  collection:"collection2"  file_count:22320  delete_count:4  deleted_byte_count:798258  replica_placement:100  version:3  modified_at_second:1614977511
+          volume id:347  size:1075145248  collection:"collection2"  file_count:22178  delete_count:1  deleted_byte_count:79392  replica_placement:100  version:3  modified_at_second:1614984727
+          volume id:348  size:1080623544  collection:"collection2"  file_count:21667  delete_count:1  deleted_byte_count:2443  replica_placement:100  version:3  modified_at_second:1614984604
+          volume id:349  size:1075957672  collection:"collection2"  file_count:22395  delete_count:2  deleted_byte_count:61565  replica_placement:100  version:3  modified_at_second:1614984748
+          volume id:351  size:1078795120  collection:"collection2"  file_count:23660  delete_count:3  deleted_byte_count:102141  replica_placement:100  version:3  modified_at_second:1614984816
+          volume id:352  size:1077145936  collection:"collection2"  file_count:22066  delete_count:1  deleted_byte_count:1018  replica_placement:100  version:3  modified_at_second:1614992130
+          volume id:353  size:1074897496  collection:"collection2"  file_count:21266  delete_count:2  deleted_byte_count:3105374  replica_placement:100  version:3  modified_at_second:1614991951
+          volume id:354  size:1085214104  collection:"collection2"  file_count:23150  delete_count:4  deleted_byte_count:82391  replica_placement:100  version:3  modified_at_second:1614992208
+          volume id:357  size:1074276152  collection:"collection2"  file_count:23137  delete_count:4  deleted_byte_count:188487  replica_placement:100  version:3  modified_at_second:1614998792
+          volume id:359  size:1074211296  collection:"collection2"  file_count:22437  delete_count:2  deleted_byte_count:187953  replica_placement:100  version:3  modified_at_second:1614998711
+          volume id:360  size:1075532512  collection:"collection2"  file_count:22574  delete_count:3  deleted_byte_count:1774776  replica_placement:100  version:3  modified_at_second:1614998770
+          volume id:361  size:1075362744  collection:"collection2"  file_count:22272  delete_count:1  deleted_byte_count:3497  replica_placement:100  version:3  modified_at_second:1614998668
+          volume id:362  size:1074074176  collection:"collection2"  file_count:20595  delete_count:1  deleted_byte_count:112145  replica_placement:100  version:3  modified_at_second:1615004407
+          volume id:363  size:1078859640  collection:"collection2"  file_count:23177  delete_count:4  deleted_byte_count:9601  replica_placement:100  version:3  modified_at_second:1615004823
+          volume id:364  size:1081280880  collection:"collection2"  file_count:22686  delete_count:1  deleted_byte_count:84375  replica_placement:100  version:3  modified_at_second:1615004813
+          volume id:365  size:1075736632  collection:"collection2"  file_count:22193  delete_count:5  deleted_byte_count:259033  replica_placement:100  version:3  modified_at_second:1615004776
+          volume id:366  size:1075267272  collection:"collection2"  file_count:21856  delete_count:5  deleted_byte_count:138363  replica_placement:100  version:3  modified_at_second:1615004703
+          volume id:367  size:1076403648  collection:"collection2"  file_count:22995  delete_count:2  deleted_byte_count:36955  replica_placement:100  version:3  modified_at_second:1615010985
+          volume id:368  size:1074821960  collection:"collection2"  file_count:22252  delete_count:4  deleted_byte_count:3291946  replica_placement:100  version:3  modified_at_second:1615010877
+          volume id:369  size:1091472040  collection:"collection2"  file_count:23709  delete_count:4  deleted_byte_count:400876  replica_placement:100  version:3  modified_at_second:1615011021
+          volume id:370  size:1076040544  collection:"collection2"  file_count:22092  delete_count:2  deleted_byte_count:115388  replica_placement:100  version:3  modified_at_second:1615010877
+          volume id:371  size:1078806216  collection:"collection2"  file_count:22685  delete_count:2  deleted_byte_count:68905  replica_placement:100  version:3  modified_at_second:1615010995
+          volume id:372  size:1076193344  collection:"collection2"  file_count:22774  delete_count:1  deleted_byte_count:3495  replica_placement:100  version:3  modified_at_second:1615016911
+          volume id:373  size:1080928088  collection:"collection2"  file_count:22617  delete_count:4  deleted_byte_count:91849  replica_placement:100  version:3  modified_at_second:1615016878
+          volume id:374  size:1085011176  collection:"collection2"  file_count:23054  delete_count:2  deleted_byte_count:89034  replica_placement:100  version:3  modified_at_second:1615016917
+          volume id:376  size:1074845832  collection:"collection2"  file_count:22908  delete_count:4  deleted_byte_count:432305  replica_placement:100  version:3  modified_at_second:1615016916
+          volume id:377  size:957434264  collection:"collection2"  file_count:14929  delete_count:1  deleted_byte_count:43099  replica_placement:100  version:3  modified_at_second:1615632323
+          volume id:379  size:1014108528  collection:"collection2"  file_count:15362  delete_count:6  deleted_byte_count:2481613  replica_placement:100  version:3  modified_at_second:1615632323
+        Disk hdd total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660
+      DataNode 192.168.1.5:8080 total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660
+    Rack DefaultRack total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660
+  DataCenter dc5 total size:306912958016 file_count:4201794 deleted_file:15268 deleted_bytes:4779359660
+total size:775256653592 file_count:10478712 deleted_file:33754 deleted_bytes:10839266043
diff --git a/weed/shell/shell_liner.go b/weed/shell/shell_liner.go
index 64c8094fe..595dbf679 100644
--- a/weed/shell/shell_liner.go
+++ b/weed/shell/shell_liner.go
@@ -3,13 +3,17 @@ package shell
 import (
 	"context"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/cluster"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/util/grace"
+	"golang.org/x/exp/slices"
 	"io"
+	"math/rand"
 	"os"
 	"path"
 	"regexp"
-	"sort"
 	"strings"
 
 	"github.com/peterh/liner"
@@ -21,11 +25,9 @@ var (
 )
 
 func RunShell(options ShellOptions) {
-
-	sort.Slice(Commands, func(i, j int) bool {
-		return strings.Compare(Commands[i].Name(), Commands[j].Name()) < 0
+	slices.SortFunc(Commands, func(a, b command) bool {
+		return strings.Compare(a.Name(), b.Name()) < 0
 	})
-
 	line = liner.NewLiner()
 	defer line.Close()
 	grace.OnInterrupt(func() {
@@ -42,13 +44,37 @@ func RunShell(options ShellOptions) {
 
 	reg, _ := regexp.Compile(`'.*?'|".*?"|\S+`)
 
-	commandEnv := NewCommandEnv(options)
+	commandEnv := NewCommandEnv(&options)
 
 	go commandEnv.MasterClient.KeepConnectedToMaster()
 	commandEnv.MasterClient.WaitUntilConnected()
 
+	if commandEnv.option.FilerAddress == "" {
+		var filers []pb.ServerAddress
+		commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
+			resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+				ClientType: cluster.FilerType,
+				FilerGroup: *options.FilerGroup,
+			})
+			if err != nil {
+				return err
+			}
+
+			for _, clusterNode := range resp.ClusterNodes {
+				filers = append(filers, pb.ServerAddress(clusterNode.Address))
+			}
+			return nil
+		})
+		fmt.Printf("master: %s ", *options.Masters)
+		if len(filers) > 0 {
+			fmt.Printf("filers: %v", filers)
+			commandEnv.option.FilerAddress = filers[rand.Intn(len(filers))]
+		}
+		fmt.Println()
+	}
+
 	if commandEnv.option.FilerAddress != "" {
-		commandEnv.WithFilerClient(func(filerClient filer_pb.SeaweedFilerClient) error {
+		commandEnv.WithFilerClient(false, func(filerClient filer_pb.SeaweedFilerClient) error {
 			resp, err := filerClient.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 			if err != nil {
 				return err
@@ -84,10 +110,12 @@ https://cloud.seaweedfs.com/ui/%s
 
 func processEachCmd(reg *regexp.Regexp, cmd string, commandEnv *CommandEnv) bool {
 	cmds := reg.FindAllString(cmd, -1)
+
+	line.AppendHistory(cmd)
+
 	if len(cmds) == 0 {
 		return false
 	} else {
-		line.AppendHistory(cmd)
 
 		args := make([]string, len(cmds[1:]))