mark volume readonly before ec encoding

5 files changed, 270 insertions, 148 deletions

diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index 1b876f82c..4004875ed 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -33,6 +33,8 @@ service VolumeServer {
     }
     rpc VolumeDelete (VolumeDeleteRequest) returns (VolumeDeleteResponse) {
     }
+    rpc VolumeMarkReadonly (VolumeMarkReadonlyRequest) returns (VolumeMarkReadonlyResponse) {
+    }
 
     // copy the .idx .dat files, and mount this volume
     rpc VolumeCopy (VolumeCopyRequest) returns (VolumeCopyResponse) {
@@ -168,6 +170,12 @@ message VolumeDeleteRequest {
 message VolumeDeleteResponse {
 }
 
+message VolumeMarkReadonlyRequest {
+    uint32 volume_id = 1;
+}
+message VolumeMarkReadonlyResponse {
+}
+
 message VolumeCopyRequest {
     uint32 volume_id = 1;
     string collection = 2;
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index 8d55a00d9..13d14b1e5 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -35,6 +35,8 @@ It has these top-level messages:
 	VolumeUnmountResponse
 	VolumeDeleteRequest
 	VolumeDeleteResponse
+	VolumeMarkReadonlyRequest
+	VolumeMarkReadonlyResponse
 	VolumeCopyRequest
 	VolumeCopyResponse
 	CopyFileRequest
@@ -558,6 +560,30 @@ func (m *VolumeDeleteResponse) String() string            { return proto.Compact
 func (*VolumeDeleteResponse) ProtoMessage()               {}
 func (*VolumeDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} }
 
+type VolumeMarkReadonlyRequest struct {
+	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
+}
+
+func (m *VolumeMarkReadonlyRequest) Reset()                    { *m = VolumeMarkReadonlyRequest{} }
+func (m *VolumeMarkReadonlyRequest) String() string            { return proto.CompactTextString(m) }
+func (*VolumeMarkReadonlyRequest) ProtoMessage()               {}
+func (*VolumeMarkReadonlyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
+
+func (m *VolumeMarkReadonlyRequest) GetVolumeId() uint32 {
+	if m != nil {
+		return m.VolumeId
+	}
+	return 0
+}
+
+type VolumeMarkReadonlyResponse struct {
+}
+
+func (m *VolumeMarkReadonlyResponse) Reset()                    { *m = VolumeMarkReadonlyResponse{} }
+func (m *VolumeMarkReadonlyResponse) String() string            { return proto.CompactTextString(m) }
+func (*VolumeMarkReadonlyResponse) ProtoMessage()               {}
+func (*VolumeMarkReadonlyResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
+
 type VolumeCopyRequest struct {
 	VolumeId       uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
 	Collection     string `protobuf:"bytes,2,opt,name=collection" json:"collection,omitempty"`
@@ -569,7 +595,7 @@ type VolumeCopyRequest struct {
 func (m *VolumeCopyRequest) Reset()                    { *m = VolumeCopyRequest{} }
 func (m *VolumeCopyRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeCopyRequest) ProtoMessage()               {}
-func (*VolumeCopyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
+func (*VolumeCopyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
 
 func (m *VolumeCopyRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -613,7 +639,7 @@ type VolumeCopyResponse struct {
 func (m *VolumeCopyResponse) Reset()                    { *m = VolumeCopyResponse{} }
 func (m *VolumeCopyResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeCopyResponse) ProtoMessage()               {}
-func (*VolumeCopyResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
+func (*VolumeCopyResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
 
 func (m *VolumeCopyResponse) GetLastAppendAtNs() uint64 {
 	if m != nil {
@@ -634,7 +660,7 @@ type CopyFileRequest struct {
 func (m *CopyFileRequest) Reset()                    { *m = CopyFileRequest{} }
 func (m *CopyFileRequest) String() string            { return proto.CompactTextString(m) }
 func (*CopyFileRequest) ProtoMessage()               {}
-func (*CopyFileRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
+func (*CopyFileRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
 
 func (m *CopyFileRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -685,7 +711,7 @@ type CopyFileResponse struct {
 func (m *CopyFileResponse) Reset()                    { *m = CopyFileResponse{} }
 func (m *CopyFileResponse) String() string            { return proto.CompactTextString(m) }
 func (*CopyFileResponse) ProtoMessage()               {}
-func (*CopyFileResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
+func (*CopyFileResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{31} }
 
 func (m *CopyFileResponse) GetFileContent() []byte {
 	if m != nil {
@@ -703,7 +729,7 @@ type VolumeTailSenderRequest struct {
 func (m *VolumeTailSenderRequest) Reset()                    { *m = VolumeTailSenderRequest{} }
 func (m *VolumeTailSenderRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeTailSenderRequest) ProtoMessage()               {}
-func (*VolumeTailSenderRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
+func (*VolumeTailSenderRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{32} }
 
 func (m *VolumeTailSenderRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -735,7 +761,7 @@ type VolumeTailSenderResponse struct {
 func (m *VolumeTailSenderResponse) Reset()                    { *m = VolumeTailSenderResponse{} }
 func (m *VolumeTailSenderResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeTailSenderResponse) ProtoMessage()               {}
-func (*VolumeTailSenderResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{31} }
+func (*VolumeTailSenderResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{33} }
 
 func (m *VolumeTailSenderResponse) GetNeedleHeader() []byte {
 	if m != nil {
@@ -768,7 +794,7 @@ type VolumeTailReceiverRequest struct {
 func (m *VolumeTailReceiverRequest) Reset()                    { *m = VolumeTailReceiverRequest{} }
 func (m *VolumeTailReceiverRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeTailReceiverRequest) ProtoMessage()               {}
-func (*VolumeTailReceiverRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{32} }
+func (*VolumeTailReceiverRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{34} }
 
 func (m *VolumeTailReceiverRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -804,7 +830,7 @@ type VolumeTailReceiverResponse struct {
 func (m *VolumeTailReceiverResponse) Reset()                    { *m = VolumeTailReceiverResponse{} }
 func (m *VolumeTailReceiverResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeTailReceiverResponse) ProtoMessage()               {}
-func (*VolumeTailReceiverResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{33} }
+func (*VolumeTailReceiverResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{35} }
 
 type VolumeEcShardsGenerateRequest struct {
 	VolumeId   uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -814,7 +840,7 @@ type VolumeEcShardsGenerateRequest struct {
 func (m *VolumeEcShardsGenerateRequest) Reset()                    { *m = VolumeEcShardsGenerateRequest{} }
 func (m *VolumeEcShardsGenerateRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsGenerateRequest) ProtoMessage()               {}
-func (*VolumeEcShardsGenerateRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{34} }
+func (*VolumeEcShardsGenerateRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{36} }
 
 func (m *VolumeEcShardsGenerateRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -836,7 +862,7 @@ type VolumeEcShardsGenerateResponse struct {
 func (m *VolumeEcShardsGenerateResponse) Reset()                    { *m = VolumeEcShardsGenerateResponse{} }
 func (m *VolumeEcShardsGenerateResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsGenerateResponse) ProtoMessage()               {}
-func (*VolumeEcShardsGenerateResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{35} }
+func (*VolumeEcShardsGenerateResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{37} }
 
 type VolumeEcShardsRebuildRequest struct {
 	VolumeId   uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -846,7 +872,7 @@ type VolumeEcShardsRebuildRequest struct {
 func (m *VolumeEcShardsRebuildRequest) Reset()                    { *m = VolumeEcShardsRebuildRequest{} }
 func (m *VolumeEcShardsRebuildRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsRebuildRequest) ProtoMessage()               {}
-func (*VolumeEcShardsRebuildRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{36} }
+func (*VolumeEcShardsRebuildRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{38} }
 
 func (m *VolumeEcShardsRebuildRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -869,7 +895,7 @@ type VolumeEcShardsRebuildResponse struct {
 func (m *VolumeEcShardsRebuildResponse) Reset()                    { *m = VolumeEcShardsRebuildResponse{} }
 func (m *VolumeEcShardsRebuildResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsRebuildResponse) ProtoMessage()               {}
-func (*VolumeEcShardsRebuildResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{37} }
+func (*VolumeEcShardsRebuildResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{39} }
 
 func (m *VolumeEcShardsRebuildResponse) GetRebuiltShardIds() []uint32 {
 	if m != nil {
@@ -889,7 +915,7 @@ type VolumeEcShardsCopyRequest struct {
 func (m *VolumeEcShardsCopyRequest) Reset()                    { *m = VolumeEcShardsCopyRequest{} }
 func (m *VolumeEcShardsCopyRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsCopyRequest) ProtoMessage()               {}
-func (*VolumeEcShardsCopyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{38} }
+func (*VolumeEcShardsCopyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{40} }
 
 func (m *VolumeEcShardsCopyRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -932,7 +958,7 @@ type VolumeEcShardsCopyResponse struct {
 func (m *VolumeEcShardsCopyResponse) Reset()                    { *m = VolumeEcShardsCopyResponse{} }
 func (m *VolumeEcShardsCopyResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsCopyResponse) ProtoMessage()               {}
-func (*VolumeEcShardsCopyResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{39} }
+func (*VolumeEcShardsCopyResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{41} }
 
 type VolumeEcShardsDeleteRequest struct {
 	VolumeId   uint32   `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -943,7 +969,7 @@ type VolumeEcShardsDeleteRequest struct {
 func (m *VolumeEcShardsDeleteRequest) Reset()                    { *m = VolumeEcShardsDeleteRequest{} }
 func (m *VolumeEcShardsDeleteRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsDeleteRequest) ProtoMessage()               {}
-func (*VolumeEcShardsDeleteRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{40} }
+func (*VolumeEcShardsDeleteRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{42} }
 
 func (m *VolumeEcShardsDeleteRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -972,7 +998,7 @@ type VolumeEcShardsDeleteResponse struct {
 func (m *VolumeEcShardsDeleteResponse) Reset()                    { *m = VolumeEcShardsDeleteResponse{} }
 func (m *VolumeEcShardsDeleteResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsDeleteResponse) ProtoMessage()               {}
-func (*VolumeEcShardsDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{41} }
+func (*VolumeEcShardsDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{43} }
 
 type VolumeEcShardsMountRequest struct {
 	VolumeId   uint32   `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -983,7 +1009,7 @@ type VolumeEcShardsMountRequest struct {
 func (m *VolumeEcShardsMountRequest) Reset()                    { *m = VolumeEcShardsMountRequest{} }
 func (m *VolumeEcShardsMountRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsMountRequest) ProtoMessage()               {}
-func (*VolumeEcShardsMountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{42} }
+func (*VolumeEcShardsMountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{44} }
 
 func (m *VolumeEcShardsMountRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -1012,7 +1038,7 @@ type VolumeEcShardsMountResponse struct {
 func (m *VolumeEcShardsMountResponse) Reset()                    { *m = VolumeEcShardsMountResponse{} }
 func (m *VolumeEcShardsMountResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsMountResponse) ProtoMessage()               {}
-func (*VolumeEcShardsMountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{43} }
+func (*VolumeEcShardsMountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{45} }
 
 type VolumeEcShardsUnmountRequest struct {
 	VolumeId uint32   `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -1022,7 +1048,7 @@ type VolumeEcShardsUnmountRequest struct {
 func (m *VolumeEcShardsUnmountRequest) Reset()                    { *m = VolumeEcShardsUnmountRequest{} }
 func (m *VolumeEcShardsUnmountRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsUnmountRequest) ProtoMessage()               {}
-func (*VolumeEcShardsUnmountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{44} }
+func (*VolumeEcShardsUnmountRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{46} }
 
 func (m *VolumeEcShardsUnmountRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -1044,7 +1070,7 @@ type VolumeEcShardsUnmountResponse struct {
 func (m *VolumeEcShardsUnmountResponse) Reset()                    { *m = VolumeEcShardsUnmountResponse{} }
 func (m *VolumeEcShardsUnmountResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardsUnmountResponse) ProtoMessage()               {}
-func (*VolumeEcShardsUnmountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{45} }
+func (*VolumeEcShardsUnmountResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{47} }
 
 type VolumeEcShardReadRequest struct {
 	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -1057,7 +1083,7 @@ type VolumeEcShardReadRequest struct {
 func (m *VolumeEcShardReadRequest) Reset()                    { *m = VolumeEcShardReadRequest{} }
 func (m *VolumeEcShardReadRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardReadRequest) ProtoMessage()               {}
-func (*VolumeEcShardReadRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{46} }
+func (*VolumeEcShardReadRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{48} }
 
 func (m *VolumeEcShardReadRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -1102,7 +1128,7 @@ type VolumeEcShardReadResponse struct {
 func (m *VolumeEcShardReadResponse) Reset()                    { *m = VolumeEcShardReadResponse{} }
 func (m *VolumeEcShardReadResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcShardReadResponse) ProtoMessage()               {}
-func (*VolumeEcShardReadResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{47} }
+func (*VolumeEcShardReadResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{49} }
 
 func (m *VolumeEcShardReadResponse) GetData() []byte {
 	if m != nil {
@@ -1128,7 +1154,7 @@ type VolumeEcBlobDeleteRequest struct {
 func (m *VolumeEcBlobDeleteRequest) Reset()                    { *m = VolumeEcBlobDeleteRequest{} }
 func (m *VolumeEcBlobDeleteRequest) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcBlobDeleteRequest) ProtoMessage()               {}
-func (*VolumeEcBlobDeleteRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{48} }
+func (*VolumeEcBlobDeleteRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{50} }
 
 func (m *VolumeEcBlobDeleteRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -1164,7 +1190,7 @@ type VolumeEcBlobDeleteResponse struct {
 func (m *VolumeEcBlobDeleteResponse) Reset()                    { *m = VolumeEcBlobDeleteResponse{} }
 func (m *VolumeEcBlobDeleteResponse) String() string            { return proto.CompactTextString(m) }
 func (*VolumeEcBlobDeleteResponse) ProtoMessage()               {}
-func (*VolumeEcBlobDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{49} }
+func (*VolumeEcBlobDeleteResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{51} }
 
 type ReadVolumeFileStatusRequest struct {
 	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
@@ -1173,7 +1199,7 @@ type ReadVolumeFileStatusRequest struct {
 func (m *ReadVolumeFileStatusRequest) Reset()                    { *m = ReadVolumeFileStatusRequest{} }
 func (m *ReadVolumeFileStatusRequest) String() string            { return proto.CompactTextString(m) }
 func (*ReadVolumeFileStatusRequest) ProtoMessage()               {}
-func (*ReadVolumeFileStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{50} }
+func (*ReadVolumeFileStatusRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{52} }
 
 func (m *ReadVolumeFileStatusRequest) GetVolumeId() uint32 {
 	if m != nil {
@@ -1196,7 +1222,7 @@ type ReadVolumeFileStatusResponse struct {
 func (m *ReadVolumeFileStatusResponse) Reset()                    { *m = ReadVolumeFileStatusResponse{} }
 func (m *ReadVolumeFileStatusResponse) String() string            { return proto.CompactTextString(m) }
 func (*ReadVolumeFileStatusResponse) ProtoMessage()               {}
-func (*ReadVolumeFileStatusResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{51} }
+func (*ReadVolumeFileStatusResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{53} }
 
 func (m *ReadVolumeFileStatusResponse) GetVolumeId() uint32 {
 	if m != nil {
@@ -1264,7 +1290,7 @@ type DiskStatus struct {
 func (m *DiskStatus) Reset()                    { *m = DiskStatus{} }
 func (m *DiskStatus) String() string            { return proto.CompactTextString(m) }
 func (*DiskStatus) ProtoMessage()               {}
-func (*DiskStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{52} }
+func (*DiskStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{54} }
 
 func (m *DiskStatus) GetDir() string {
 	if m != nil {
@@ -1307,7 +1333,7 @@ type MemStatus struct {
 func (m *MemStatus) Reset()                    { *m = MemStatus{} }
 func (m *MemStatus) String() string            { return proto.CompactTextString(m) }
 func (*MemStatus) ProtoMessage()               {}
-func (*MemStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{53} }
+func (*MemStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{55} }
 
 func (m *MemStatus) GetGoroutines() int32 {
 	if m != nil {
@@ -1385,6 +1411,8 @@ func init() {
 	proto.RegisterType((*VolumeUnmountResponse)(nil), "volume_server_pb.VolumeUnmountResponse")
 	proto.RegisterType((*VolumeDeleteRequest)(nil), "volume_server_pb.VolumeDeleteRequest")
 	proto.RegisterType((*VolumeDeleteResponse)(nil), "volume_server_pb.VolumeDeleteResponse")
+	proto.RegisterType((*VolumeMarkReadonlyRequest)(nil), "volume_server_pb.VolumeMarkReadonlyRequest")
+	proto.RegisterType((*VolumeMarkReadonlyResponse)(nil), "volume_server_pb.VolumeMarkReadonlyResponse")
 	proto.RegisterType((*VolumeCopyRequest)(nil), "volume_server_pb.VolumeCopyRequest")
 	proto.RegisterType((*VolumeCopyResponse)(nil), "volume_server_pb.VolumeCopyResponse")
 	proto.RegisterType((*CopyFileRequest)(nil), "volume_server_pb.CopyFileRequest")
@@ -1439,6 +1467,7 @@ type VolumeServerClient interface {
 	VolumeMount(ctx context.Context, in *VolumeMountRequest, opts ...grpc.CallOption) (*VolumeMountResponse, error)
 	VolumeUnmount(ctx context.Context, in *VolumeUnmountRequest, opts ...grpc.CallOption) (*VolumeUnmountResponse, error)
 	VolumeDelete(ctx context.Context, in *VolumeDeleteRequest, opts ...grpc.CallOption) (*VolumeDeleteResponse, error)
+	VolumeMarkReadonly(ctx context.Context, in *VolumeMarkReadonlyRequest, opts ...grpc.CallOption) (*VolumeMarkReadonlyResponse, error)
 	// copy the .idx .dat files, and mount this volume
 	VolumeCopy(ctx context.Context, in *VolumeCopyRequest, opts ...grpc.CallOption) (*VolumeCopyResponse, error)
 	ReadVolumeFileStatus(ctx context.Context, in *ReadVolumeFileStatusRequest, opts ...grpc.CallOption) (*ReadVolumeFileStatusResponse, error)
@@ -1595,6 +1624,15 @@ func (c *volumeServerClient) VolumeDelete(ctx context.Context, in *VolumeDeleteR
 	return out, nil
 }
 
+func (c *volumeServerClient) VolumeMarkReadonly(ctx context.Context, in *VolumeMarkReadonlyRequest, opts ...grpc.CallOption) (*VolumeMarkReadonlyResponse, error) {
+	out := new(VolumeMarkReadonlyResponse)
+	err := grpc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeMarkReadonly", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *volumeServerClient) VolumeCopy(ctx context.Context, in *VolumeCopyRequest, opts ...grpc.CallOption) (*VolumeCopyResponse, error) {
 	out := new(VolumeCopyResponse)
 	err := grpc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeCopy", in, out, c.cc, opts...)
@@ -1797,6 +1835,7 @@ type VolumeServerServer interface {
 	VolumeMount(context.Context, *VolumeMountRequest) (*VolumeMountResponse, error)
 	VolumeUnmount(context.Context, *VolumeUnmountRequest) (*VolumeUnmountResponse, error)
 	VolumeDelete(context.Context, *VolumeDeleteRequest) (*VolumeDeleteResponse, error)
+	VolumeMarkReadonly(context.Context, *VolumeMarkReadonlyRequest) (*VolumeMarkReadonlyResponse, error)
 	// copy the .idx .dat files, and mount this volume
 	VolumeCopy(context.Context, *VolumeCopyRequest) (*VolumeCopyResponse, error)
 	ReadVolumeFileStatus(context.Context, *ReadVolumeFileStatusRequest) (*ReadVolumeFileStatusResponse, error)
@@ -2037,6 +2076,24 @@ func _VolumeServer_VolumeDelete_Handler(srv interface{}, ctx context.Context, de
 	return interceptor(ctx, in, info, handler)
 }
 
+func _VolumeServer_VolumeMarkReadonly_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(VolumeMarkReadonlyRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(VolumeServerServer).VolumeMarkReadonly(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/volume_server_pb.VolumeServer/VolumeMarkReadonly",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(VolumeServerServer).VolumeMarkReadonly(ctx, req.(*VolumeMarkReadonlyRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _VolumeServer_VolumeCopy_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(VolumeCopyRequest)
 	if err := dec(in); err != nil {
@@ -2329,6 +2386,10 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 			Handler:    _VolumeServer_VolumeDelete_Handler,
 		},
 		{
+			MethodName: "VolumeMarkReadonly",
+			Handler:    _VolumeServer_VolumeMarkReadonly_Handler,
+		},
+		{
 			MethodName: "VolumeCopy",
 			Handler:    _VolumeServer_VolumeCopy_Handler,
 		},
@@ -2397,124 +2458,126 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("volume_server.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 1890 bytes of a gzipped FileDescriptorProto
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+	0x47, 0x49, 0xae, 0x4e, 0x56, 0x03, 0xf5, 0xb9, 0x5a, 0x5a, 0x62, 0xd4, 0xe7, 0x6a, 0x79, 0xd3,
+	0x20, 0xc4, 0xa5, 0xc1, 0x90, 0x9d, 0xa4, 0xeb, 0x83, 0xa1, 0x62, 0x51, 0x50, 0x1f, 0x0c, 0x95,
+	0xc3, 0xf9, 0x1c, 0xfa, 0x03, 0xac, 0x55, 0x0f, 0xd0, 0xa8, 0x36, 0xe3, 0x6b, 0x06, 0x79, 0xfd,
+	0x71, 0x73, 0x82, 0x54, 0xfc, 0xbb, 0xa4, 0x3e, 0x15, 0x06, 0xe8, 0xfa, 0xfa, 0x54, 0x3d, 0xc6,
+	0xeb, 0xfb, 0x8d, 0xf1, 0xcb, 0xa9, 0x97, 0x9d, 0x54, 0xeb, 0xbd, 0x5d, 0x31, 0x94, 0xd7, 0x7b,
+	0xbb, 0x72, 0xf8, 0x15, 0xf9, 0x51, 0x35, 0x85, 0x56, 0xe5, 0xc7, 0x94, 0x31, 0x59, 0xdf, 0x6b,
+	0x8a, 0x9e, 0x7b, 0xbe, 0xcb, 0x63, 0x26, 0x9a, 0xa9, 0x7f, 0xae, 0x32, 0x7f, 0xd6, 0x10, 0xbb,
+	0xfe, 0x76, 0x93, 0x4a, 0x3d, 0xd3, 0x80, 0x42, 0xc5, 0xde, 0x6f, 0x8c, 0x9f, 0xca, 0x0e, 0x93,
+	0xdd, 0x72, 0x66, 0x44, 0x44, 0xbb, 0x33, 0xf8, 0x64, 0x46, 0x5c, 0xfd, 0x51, 0x23, 0xdc, 0xaa,
+	0xec, 0xcd, 0x0e, 0x6d, 0xd3, 0xe2, 0xa9, 0x34, 0x69, 0x4e, 0x8b, 0xa7, 0x8a, 0x39, 0x70, 0xee,
+	0x74, 0x41, 0xfc, 0x81, 0xfc, 0xf9, 0x7f, 0x03, 0x00, 0x00, 0xff, 0xff, 0xc8, 0x44, 0x1a, 0xc5,
+	0x57, 0x1e, 0x00, 0x00,
 }
diff --git a/weed/server/volume_grpc_admin.go b/weed/server/volume_grpc_admin.go
index d9244aa64..35c2508a6 100644
--- a/weed/server/volume_grpc_admin.go
+++ b/weed/server/volume_grpc_admin.go
@@ -94,3 +94,19 @@ func (vs *VolumeServer) VolumeDelete(ctx context.Context, req *volume_server_pb.
 	return resp, err
 
 }
+
+func (vs *VolumeServer) VolumeMarkReadonly(ctx context.Context, req *volume_server_pb.VolumeMarkReadonlyRequest) (*volume_server_pb.VolumeMarkReadonlyResponse, error) {
+
+	resp := &volume_server_pb.VolumeMarkReadonlyResponse{}
+
+	err := vs.store.MarkVolumeReadonly(needle.VolumeId(req.VolumeId))
+
+	if err != nil {
+		glog.Errorf("volume mark readonly %v: %v", req, err)
+	} else {
+		glog.V(2).Infof("volume mark readonly %v", req)
+	}
+
+	return resp, err
+
+}
diff --git a/weed/shell/command_ec_encode.go b/weed/shell/command_ec_encode.go
index 492dc77eb..3ae6b9101 100644
--- a/weed/shell/command_ec_encode.go
+++ b/weed/shell/command_ec_encode.go
@@ -92,6 +92,12 @@ func doEcEncode(ctx context.Context, commandEnv *CommandEnv, collection string,
 		return fmt.Errorf("volume %d not found", vid)
 	}
 
+	// mark the volume as readonly
+	err = markVolumeReadonly(ctx, commandEnv.option.GrpcDialOption, needle.VolumeId(vid), locations)
+	if err != nil {
+		return fmt.Errorf("generate ec shards for volume %d on %s: %v", vid, locations[0].Url, err)
+	}
+
 	// generate ec shards
 	err = generateEcShards(ctx, commandEnv.option.GrpcDialOption, needle.VolumeId(vid), collection, locations[0].Url)
 	if err != nil {
@@ -107,6 +113,26 @@ func doEcEncode(ctx context.Context, commandEnv *CommandEnv, collection string,
 	return nil
 }
 
+func markVolumeReadonly(ctx context.Context, grpcDialOption grpc.DialOption, volumeId needle.VolumeId, locations []wdclient.Location) error {
+
+	for _, location := range locations {
+
+		err := operation.WithVolumeServerClient(location.Url, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+			_, markErr := volumeServerClient.VolumeMarkReadonly(ctx, &volume_server_pb.VolumeMarkReadonlyRequest{
+				VolumeId:   uint32(volumeId),
+			})
+			return markErr
+		})
+
+		if err != nil {
+			return err
+		}
+
+	}
+
+	return nil
+}
+
 func generateEcShards(ctx context.Context, grpcDialOption grpc.DialOption, volumeId needle.VolumeId, collection string, sourceVolumeServer string) error {
 
 	err := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 7476de348..3d4859a97 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -252,6 +252,15 @@ func (s *Store) HasVolume(i needle.VolumeId) bool {
 	return v != nil
 }
 
+func (s *Store) MarkVolumeReadonly(i needle.VolumeId) error{
+	v := s.findVolume(i)
+	if v == nil {
+		return fmt.Errorf("volume %d not found", i)
+	}
+	v.readOnly = true
+	return nil
+}
+
 func (s *Store) MountVolume(i needle.VolumeId) error {
 	for _, location := range s.Locations {
 		if found := location.LoadVolume(i, s.NeedleMapType); found == true {