diff options
| -rw-r--r-- | weed/pb/master.proto | 1 | ||||
| -rw-r--r-- | weed/pb/master_pb/master.pb.go | 197 | ||||
| -rw-r--r-- | weed/server/master_grpc_server_volume.go | 3 | ||||
| -rw-r--r-- | weed/shell/command_volume_balance.go | 211 |
4 files changed, 317 insertions, 95 deletions
diff --git a/weed/pb/master.proto b/weed/pb/master.proto index 2d1262b07..e6d34b826 100644 --- a/weed/pb/master.proto +++ b/weed/pb/master.proto @@ -202,4 +202,5 @@ message VolumeListRequest { } message VolumeListResponse { TopologyInfo topology_info = 1; + uint64 volume_size_limit_mb = 2; } diff --git a/weed/pb/master_pb/master.pb.go b/weed/pb/master_pb/master.pb.go index 90d946e4a..4c2e893a6 100644 --- a/weed/pb/master_pb/master.pb.go +++ b/weed/pb/master_pb/master.pb.go @@ -1068,7 +1068,8 @@ func (*VolumeListRequest) ProtoMessage() {} func (*VolumeListRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} } type VolumeListResponse struct { - TopologyInfo *TopologyInfo `protobuf:"bytes,1,opt,name=topology_info,json=topologyInfo" json:"topology_info,omitempty"` + TopologyInfo *TopologyInfo `protobuf:"bytes,1,opt,name=topology_info,json=topologyInfo" json:"topology_info,omitempty"` + VolumeSizeLimitMb uint64 `protobuf:"varint,2,opt,name=volume_size_limit_mb,json=volumeSizeLimitMb" json:"volume_size_limit_mb,omitempty"` } func (m *VolumeListResponse) Reset() { *m = VolumeListResponse{} } @@ -1083,6 +1084,13 @@ func (m *VolumeListResponse) GetTopologyInfo() *TopologyInfo { return nil } +func (m *VolumeListResponse) GetVolumeSizeLimitMb() uint64 { + if m != nil { + return m.VolumeSizeLimitMb + } + return 0 +} + func init() { proto.RegisterType((*Heartbeat)(nil), "master_pb.Heartbeat") proto.RegisterType((*HeartbeatResponse)(nil), "master_pb.HeartbeatResponse") @@ -1486,97 +1494,98 @@ var _Seaweed_serviceDesc = grpc.ServiceDesc{ func init() { proto.RegisterFile("master.proto", fileDescriptor0) } var fileDescriptor0 = []byte{ - // 1457 bytes of a gzipped FileDescriptorProto - 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xd4, 0x58, 0xcd, 0x6e, 0xdb, 0x46, - 0x10, 0x36, 0x29, 0x59, 0x96, 0x46, 0x96, 0x2c, 0xad, 0x9d, 0x84, 0x51, 0x9a, 0x44, 0xd9, 0x5c, - 0x94, 0xfe, 0x18, 0xa9, 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a/weed/server/master_grpc_server_volume.go +++ b/weed/server/master_grpc_server_volume.go @@ -135,7 +135,8 @@ func (ms *MasterServer) VolumeList(ctx context.Context, req *master_pb.VolumeLis } resp := &master_pb.VolumeListResponse{ - TopologyInfo: ms.Topo.ToTopologyInfo(), + TopologyInfo: ms.Topo.ToTopologyInfo(), + VolumeSizeLimitMb: uint64(ms.volumeSizeLimitMB), } return resp, nil diff --git a/weed/shell/command_volume_balance.go b/weed/shell/command_volume_balance.go new file mode 100644 index 000000000..26d77ab48 --- /dev/null +++ b/weed/shell/command_volume_balance.go @@ -0,0 +1,211 @@ +package shell + +import ( + "context" + "flag" + "fmt" + "io" + "os" + "sort" + "time" + + "github.com/chrislusf/seaweedfs/weed/pb/master_pb" + "github.com/chrislusf/seaweedfs/weed/storage/needle" +) + +func init() { + commands = append(commands, &commandVolumeBalance{}) +} + +type commandVolumeBalance struct { +} + +func (c *commandVolumeBalance) Name() string { + return "volume.balance" +} + +func (c *commandVolumeBalance) Help() string { + return `balance all volumes among volume servers + + volume.balance [-c collectionName] [-f] + + Algorithm: + For each type of volume server (different max volume count limit){ + balanceWritableVolumes() + balanceReadOnlyVolumes() + } + + func balanceWritableVolumes(){ + idealWritableVolumes = totalWritableVolumes / numVolumeServers + for { + sort all volume servers ordered by{ + local writable volumes + } + pick the volume server A with the lowest number of writable volumes x + pick the volume server B with the highest number of writable volumes y + if y > idealWritableVolumes and x +1 < idealWritableVolumes { + if B has a writable volume id v that A does not have { + move writable volume v from A to B + } + } + } + } + func balanceReadOnlyVolumes(){ + //similar to balanceWritableVolumes + } + +` +} + +func (c *commandVolumeBalance) Do(args []string, commandEnv *commandEnv, writer io.Writer) (err error) { + + balanceCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError) + collection := balanceCommand.String("c", "", "collection name. use \"ALL\" for all collections") + applyBalancing := balanceCommand.Bool("f", false, "apply the balancing plan.") + if err = balanceCommand.Parse(args); err != nil { + return nil + } + + var resp *master_pb.VolumeListResponse + ctx := context.Background() + err = commandEnv.masterClient.WithClient(ctx, func(client master_pb.SeaweedClient) error { + resp, err = client.VolumeList(ctx, &master_pb.VolumeListRequest{}) + return err + }) + if err != nil { + return err + } + + typeToNodes := collectVolumeServersByType(resp.TopologyInfo) + for _, volumeServers := range typeToNodes { + if len(volumeServers) < 2 { + continue + } + balanceVolumeServers(commandEnv, volumeServers, resp.VolumeSizeLimitMb*1024*1024, *collection, *applyBalancing) + } + return nil +} + +func balanceVolumeServers(commandEnv *commandEnv, dataNodeInfos []*master_pb.DataNodeInfo, volumeSizeLimit uint64, collection string, applyBalancing bool) { + var nodes []*Node + for _, dn := range dataNodeInfos { + nodes = append(nodes, &Node{ + info: dn, + }) + } + + // balance writable volumes + for _, n := range nodes { + n.prepareVolumes(func(v *master_pb.VolumeInformationMessage) bool { + if collection != "ALL" { + if v.Collection != collection { + return false + } + } + return !v.ReadOnly && v.Size < volumeSizeLimit + }) + } + balanceSelectedVolume(commandEnv, nodes, sortWritableVolumes, applyBalancing) + + // balance readable volumes + for _, n := range nodes { + n.prepareVolumes(func(v *master_pb.VolumeInformationMessage) bool { + if collection != "ALL" { + if v.Collection != collection { + return false + } + } + return v.ReadOnly || v.Size >= volumeSizeLimit + }) + } + balanceSelectedVolume(commandEnv, nodes, sortReadOnlyVolumes, applyBalancing) +} + +func collectVolumeServersByType(t *master_pb.TopologyInfo) (typeToNodes map[uint64][]*master_pb.DataNodeInfo) { + typeToNodes = make(map[uint64][]*master_pb.DataNodeInfo) + for _, dc := range t.DataCenterInfos { + for _, r := range dc.RackInfos { + for _, dn := range r.DataNodeInfos { + typeToNodes[dn.MaxVolumeCount] = append(typeToNodes[dn.MaxVolumeCount], dn) + } + } + } + return +} + +type Node struct { + info *master_pb.DataNodeInfo + selectedVolumes map[uint32]*master_pb.VolumeInformationMessage +} + +func sortWritableVolumes(volumes []*master_pb.VolumeInformationMessage) { + sort.Slice(volumes, func(i, j int) bool { + return volumes[i].Size < volumes[j].Size + }) +} + +func sortReadOnlyVolumes(volumes []*master_pb.VolumeInformationMessage) { + sort.Slice(volumes, func(i, j int) bool { + return volumes[i].Id < volumes[j].Id + }) +} + +func balanceSelectedVolume(commandEnv *commandEnv, nodes []*Node, sortCandidatesFn func(volumes []*master_pb.VolumeInformationMessage), applyBalancing bool) { + selectedVolumeCount := 0 + for _, dn := range nodes { + selectedVolumeCount += len(dn.selectedVolumes) + } + + idealSelectedVolumes := selectedVolumeCount / len(nodes) + + hasMove := true + + for hasMove { + hasMove = false + sort.Slice(nodes, func(i, j int) bool { + return len(nodes[i].selectedVolumes) < len(nodes[j].selectedVolumes) + }) + emptyNode, fullNode := nodes[0], nodes[len(nodes)-1] + if len(fullNode.selectedVolumes) > idealSelectedVolumes && len(emptyNode.selectedVolumes)+1 <= idealSelectedVolumes { + + // sort the volumes to move + var candidateVolumes []*master_pb.VolumeInformationMessage + for _, v := range fullNode.selectedVolumes { + candidateVolumes = append(candidateVolumes, v) + } + sortCandidatesFn(candidateVolumes) + + for _, v := range candidateVolumes { + if _, found := emptyNode.selectedVolumes[v.Id]; !found { + moveVolume(commandEnv, v, fullNode, emptyNode, applyBalancing) + delete(fullNode.selectedVolumes, v.Id) + emptyNode.selectedVolumes[v.Id] = v + hasMove = true + break + } + } + } + } + +} + +func moveVolume(commandEnv *commandEnv, v *master_pb.VolumeInformationMessage, fullNode *Node, emptyNode *Node, applyBalancing bool) { + collectionPrefix := v.Collection + "_" + if v.Collection == "" { + collectionPrefix = "" + } + fmt.Fprintf(os.Stdout, "moving volume %s%d %s => %s\n", collectionPrefix, v.Id, fullNode.info.Id, emptyNode.info.Id) + if applyBalancing { + ctx := context.Background() + LiveMoveVolume(ctx, commandEnv.option.GrpcDialOption, needle.VolumeId(v.Id), fullNode.info.Id, emptyNode.info.Id, 5*time.Second) + } +} + +func (node *Node) prepareVolumes(fn func(v *master_pb.VolumeInformationMessage) bool) { + node.selectedVolumes = make(map[uint32]*master_pb.VolumeInformationMessage) + for _, v := range node.info.VolumeInfos { + if fn(v) { + node.selectedVolumes[v.Id] = v + } + } +} |