volume: atomic copying file, adds version and stopOffset

9 files changed, 168 insertions, 113 deletions

diff --git a/weed/command/backup.go b/weed/command/backup.go
index 0e14e03ec..51a89a5af 100644
--- a/weed/command/backup.go
+++ b/weed/command/backup.go
@@ -90,7 +90,7 @@ func runBackup(cmd *Command, args []string) bool {
 		return true
 	}
 
-	if v.SuperBlock.CompactRevision < uint16(stats.CompactRevision) {
+	if v.SuperBlock.CompactionRevision < uint16(stats.CompactRevision) {
 		if err = v.Compact(0); err != nil {
 			fmt.Printf("Compact Volume before synchronizing %v\n", err)
 			return true
@@ -99,7 +99,7 @@ func runBackup(cmd *Command, args []string) bool {
 			fmt.Printf("Commit Compact before synchronizing %v\n", err)
 			return true
 		}
-		v.SuperBlock.CompactRevision = uint16(stats.CompactRevision)
+		v.SuperBlock.CompactionRevision = uint16(stats.CompactRevision)
 		v.DataFile().WriteAt(v.SuperBlock.Bytes(), 0)
 	}
 
diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index a00ccc053..1edb541b1 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -162,6 +162,8 @@ message CopyFileRequest {
     uint32 volume_id = 1;
     bool is_idx_file = 2;
     bool is_dat_file = 3;
+    uint32 compaction_revision = 4;
+    uint64 stop_offset = 5;
 }
 message CopyFileResponse {
     bytes file_content = 1;
@@ -188,6 +190,7 @@ message ReadVolumeFileStatusResponse {
     uint64 dat_file_timestamp_seconds = 4;
     uint64 dat_file_size = 5;
     uint64 file_count = 6;
+    uint32 compaction_revision = 7;
 }
 
 message DiskStatus {
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index 193d6d089..5467e0a49 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -597,9 +597,11 @@ func (m *VolumeCopyResponse) GetLastAppendAtNs() uint64 {
 }
 
 type CopyFileRequest struct {
-	VolumeId  uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
-	IsIdxFile bool   `protobuf:"varint,2,opt,name=is_idx_file,json=isIdxFile" json:"is_idx_file,omitempty"`
-	IsDatFile bool   `protobuf:"varint,3,opt,name=is_dat_file,json=isDatFile" json:"is_dat_file,omitempty"`
+	VolumeId           uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId" json:"volume_id,omitempty"`
+	IsIdxFile          bool   `protobuf:"varint,2,opt,name=is_idx_file,json=isIdxFile" json:"is_idx_file,omitempty"`
+	IsDatFile          bool   `protobuf:"varint,3,opt,name=is_dat_file,json=isDatFile" json:"is_dat_file,omitempty"`
+	CompactionRevision uint32 `protobuf:"varint,4,opt,name=compaction_revision,json=compactionRevision" json:"compaction_revision,omitempty"`
+	StopOffset         uint64 `protobuf:"varint,5,opt,name=stop_offset,json=stopOffset" json:"stop_offset,omitempty"`
 }
 
 func (m *CopyFileRequest) Reset()                    { *m = CopyFileRequest{} }
@@ -628,6 +630,20 @@ func (m *CopyFileRequest) GetIsDatFile() bool {
 	return false
 }
 
+func (m *CopyFileRequest) GetCompactionRevision() uint32 {
+	if m != nil {
+		return m.CompactionRevision
+	}
+	return 0
+}
+
+func (m *CopyFileRequest) GetStopOffset() uint64 {
+	if m != nil {
+		return m.StopOffset
+	}
+	return 0
+}
+
 type CopyFileResponse struct {
 	FileContent []byte `protobuf:"bytes,1,opt,name=file_content,json=fileContent,proto3" json:"file_content,omitempty"`
 }
@@ -731,6 +747,7 @@ type ReadVolumeFileStatusResponse struct {
 	DatFileTimestampSeconds uint64 `protobuf:"varint,4,opt,name=dat_file_timestamp_seconds,json=datFileTimestampSeconds" json:"dat_file_timestamp_seconds,omitempty"`
 	DatFileSize             uint64 `protobuf:"varint,5,opt,name=dat_file_size,json=datFileSize" json:"dat_file_size,omitempty"`
 	FileCount               uint64 `protobuf:"varint,6,opt,name=file_count,json=fileCount" json:"file_count,omitempty"`
+	CompactionRevision      uint32 `protobuf:"varint,7,opt,name=compaction_revision,json=compactionRevision" json:"compaction_revision,omitempty"`
 }
 
 func (m *ReadVolumeFileStatusResponse) Reset()                    { *m = ReadVolumeFileStatusResponse{} }
@@ -780,6 +797,13 @@ func (m *ReadVolumeFileStatusResponse) GetFileCount() uint64 {
 	return 0
 }
 
+func (m *ReadVolumeFileStatusResponse) GetCompactionRevision() uint32 {
+	if m != nil {
+		return m.CompactionRevision
+	}
+	return 0
+}
+
 type DiskStatus struct {
 	Dir  string `protobuf:"bytes,1,opt,name=dir" json:"dir,omitempty"`
 	All  uint64 `protobuf:"varint,2,opt,name=all" json:"all,omitempty"`
@@ -1579,89 +1603,92 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("volume_server.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	0x71, 0x1d, 0xa0, 0xf3, 0xb0, 0x14, 0x3d, 0x1b, 0x8f, 0x69, 0x2b, 0xd7, 0xce, 0xc5, 0x4a, 0xd4,
+	0x4a, 0xd3, 0xd8, 0xfd, 0xbc, 0xb4, 0x1b, 0x12, 0x1c, 0xa5, 0x71, 0x2b, 0xc3, 0xe5, 0x88, 0x33,
+	0xd5, 0xdc, 0xf2, 0x9a, 0x6e, 0x8e, 0x4d, 0x16, 0x86, 0xc4, 0x17, 0x94, 0x45, 0x99, 0xd9, 0xcb,
+	0x00, 0x7e, 0x0e, 0x9a, 0x56, 0x99, 0x42, 0x1c, 0x1b, 0x86, 0x55, 0x55, 0x63, 0xf6, 0x4f, 0x0b,
+	0xce, 0x3e, 0x32, 0x45, 0xd3, 0x8e, 0x5b, 0x1d, 0x40, 0xd1, 0xe5, 0x89, 0xb2, 0xcb, 0xf2, 0x01,
+	0x75, 0x2a, 0x07, 0x24, 0x25, 0x12, 0x12, 0x87, 0xd4, 0xc7, 0xca, 0x44, 0x57, 0x99, 0x98, 0x86,
+	0xd0, 0x0a, 0x74, 0x84, 0x08, 0x87, 0xf3, 0x6a, 0x47, 0x2e, 0x9d, 0x21, 0x9c, 0x2b, 0xc7, 0x6a,
+	0xd2, 0xf8, 0x14, 0xd6, 0x34, 0xb2, 0x73, 0x14, 0xf9, 0x3b, 0xea, 0x36, 0xb4, 0x2a, 0xfa, 0xbf,
+	0x16, 0x0c, 0xab, 0x8a, 0xa6, 0x8b, 0xdf, 0xb7, 0x02, 0xef, 0x9a, 0x1f, 0xba, 0x02, 0x3d, 0x81,
+	0x69, 0xe8, 0xb1, 0xbd, 0x3d, 0x4e, 0xc4, 0x70, 0x61, 0xdd, 0x1a, 0x75, 0x5d, 0x90, 0xd0, 0x33,
+	0x85, 0xa0, 0x5b, 0xb0, 0xe2, 0xeb, 0x4e, 0xf6, 0x12, 0xf2, 0x86, 0x72, 0x69, 0x79, 0x51, 0x05,
+	0x76, 0xca, 0xcf, 0x3a, 0x5c, 0xc3, 0xc8, 0x81, 0x01, 0x0d, 0xde, 0x7a, 0x6a, 0x80, 0xa8, 0xeb,
+	0xbf, 0xa4, 0xac, 0xf5, 0x68, 0xf0, 0xf6, 0x5b, 0x1a, 0x92, 0x1d, 0x39, 0x05, 0x5e, 0xc2, 0x45,
+	0x9d, 0xfc, 0x76, 0xe4, 0x27, 0x64, 0x4c, 0x22, 0x81, 0xc3, 0x4d, 0x16, 0x1f, 0xb5, 0x6a, 0x81,
+	0xf3, 0xb0, 0xc4, 0x69, 0xe4, 0x13, 0x2f, 0xd2, 0x63, 0xa8, 0xeb, 0x2e, 0xaa, 0xef, 0xa7, 0xdc,
+	0x79, 0x0c, 0x97, 0x1a, 0xec, 0x9a, 0xca, 0x5e, 0x85, 0xbe, 0x0a, 0xcc, 0x67, 0x91, 0x20, 0x91,
+	0x50, 0xb6, 0xfb, 0x6e, 0x4f, 0x62, 0x9b, 0x1a, 0x72, 0x3e, 0x06, 0xa4, 0x6d, 0x3c, 0x61, 0x69,
+	0xd4, 0xee, 0x6a, 0x9e, 0x85, 0xd5, 0x82, 0x8a, 0xe9, 0x8d, 0x07, 0x70, 0x46, 0xc3, 0x2f, 0xa2,
+	0x71, 0x6b, 0x5b, 0x6b, 0x70, 0xb6, 0xa4, 0x64, 0xac, 0xdd, 0xcf, 0x9c, 0x14, 0xdf, 0x89, 0x63,
+	0x8d, 0x9d, 0xcb, 0x22, 0x28, 0x3e, 0x15, 0xce, 0x5f, 0x16, 0x9c, 0xce, 0xc6, 0x48, 0xcb, 0xaa,
+	0xbf, 0x63, 0xdb, 0x75, 0x1a, 0xdb, 0xae, 0x3b, 0x69, 0xbb, 0x11, 0xac, 0x70, 0x96, 0x26, 0x3e,
+	0xf1, 0x02, 0x2c, 0xb0, 0x17, 0xb1, 0x80, 0x98, 0xae, 0x3c, 0xa9, 0xf1, 0x2d, 0x2c, 0xf0, 0x53,
+	0x16, 0x10, 0xe7, 0xab, 0xec, 0x50, 0x0a, 0xa7, 0x79, 0x0b, 0x4e, 0x87, 0x98, 0x0b, 0x0f, 0xc7,
+	0x31, 0x89, 0x02, 0x0f, 0x0b, 0xd9, 0x12, 0x96, 0x6a, 0x89, 0x93, 0x72, 0xe3, 0x91, 0xc2, 0x1f,
+	0x89, 0xa7, 0xdc, 0xf9, 0xdb, 0x82, 0x53, 0x52, 0x57, 0xb6, 0x60, 0xcb, 0x7c, 0x7b, 0x94, 0x7b,
+	0x59, 0x27, 0xab, 0x84, 0x97, 0xdc, 0x65, 0xca, 0xb7, 0x75, 0x1b, 0x9b, 0xfd, 0x00, 0x0b, 0xbd,
+	0xdf, 0xc9, 0xf6, 0xb7, 0xb0, 0x50, 0xfb, 0xf7, 0x60, 0xd5, 0xdc, 0x0c, 0xca, 0xa2, 0xc9, 0xa5,
+	0xd1, 0x6f, 0x21, 0x9a, 0x6c, 0xe5, 0xf7, 0xe6, 0x0a, 0xf4, 0xb8, 0x60, 0x71, 0x76, 0x07, 0xe7,
+	0xf5, 0x1d, 0x94, 0x90, 0xbe, 0x83, 0xce, 0x27, 0xb0, 0x32, 0xc9, 0xa0, 0x7d, 0x3f, 0xa7, 0xd9,
+	0x51, 0x3f, 0xc7, 0x34, 0x7c, 0xcf, 0x0b, 0x86, 0x46, 0x70, 0x2a, 0x48, 0x30, 0x8d, 0x68, 0xb4,
+	0xbf, 0x43, 0x7c, 0x16, 0x05, 0x5c, 0x65, 0x3e, 0x70, 0xcb, 0xb0, 0xf3, 0x5b, 0x76, 0x62, 0xda,
+	0xed, 0xe4, 0x7d, 0x8e, 0x08, 0x09, 0x42, 0xe2, 0x1d, 0x10, 0x1c, 0x90, 0xc4, 0x04, 0xdc, 0xd7,
+	0xe0, 0x77, 0x0a, 0x93, 0x95, 0x30, 0x42, 0xbb, 0x2c, 0x38, 0x52, 0x21, 0xf4, 0x5d, 0xd0, 0xd0,
+	0x63, 0x16, 0x1c, 0xa9, 0x11, 0xc3, 0x3d, 0x75, 0xf4, 0xfe, 0x41, 0x1a, 0x1d, 0x9a, 0xea, 0xf7,
+	0x28, 0xff, 0x1e, 0x73, 0xb1, 0x29, 0x21, 0xe7, 0x0b, 0xb8, 0xe0, 0x12, 0x1c, 0xe8, 0x18, 0xd4,
+	0xe0, 0x69, 0x3f, 0x9c, 0xff, 0x39, 0x01, 0x17, 0xeb, 0x95, 0xdb, 0x0c, 0xe8, 0x2f, 0xc1, 0xce,
+	0x07, 0xa0, 0xa0, 0x63, 0xc2, 0x05, 0x1e, 0xc7, 0x1e, 0x37, 0xe5, 0xd2, 0x05, 0x5d, 0x33, 0xd3,
+	0xf0, 0x79, 0xb6, 0x6f, 0xca, 0x56, 0x9d, 0x9e, 0x9d, 0xca, 0xf4, 0x94, 0x0e, 0xb2, 0xbe, 0xab,
+	0x71, 0xd0, 0xd5, 0x0e, 0x02, 0xdd, 0x87, 0x75, 0x0e, 0x72, 0x65, 0xe5, 0x40, 0x37, 0x5a, 0xcf,
+	0xc8, 0x2b, 0x07, 0x97, 0x00, 0x4c, 0x57, 0xa5, 0x51, 0xf6, 0x1a, 0x2c, 0xeb, 0x9e, 0x4a, 0x23,
+	0xd1, 0xd4, 0xda, 0x8b, 0x4d, 0xad, 0xed, 0xfc, 0x00, 0xb0, 0x45, 0xf9, 0xa1, 0x2e, 0xa2, 0x9c,
+	0x03, 0x01, 0x4d, 0x0c, 0x5d, 0x90, 0x4b, 0x89, 0xe0, 0x30, 0x34, 0xa5, 0x91, 0x4b, 0x49, 0x1d,
+	0x53, 0x4e, 0x02, 0x93, 0xbd, 0x5a, 0x4b, 0x6c, 0x2f, 0x21, 0xc4, 0x24, 0xa8, 0xd6, 0xce, 0xef,
+	0x16, 0x2c, 0x3f, 0x21, 0x63, 0x63, 0xf9, 0x32, 0xc0, 0x3e, 0x4b, 0x58, 0x2a, 0x68, 0x44, 0xf4,
+	0x20, 0x98, 0x77, 0xa7, 0x90, 0xff, 0xef, 0x47, 0x51, 0x59, 0x12, 0xee, 0x99, 0x62, 0xa9, 0xb5,
+	0xc4, 0x0e, 0x08, 0x8e, 0x4d, 0x7d, 0xd4, 0x5a, 0x12, 0x61, 0x2e, 0xb0, 0x7f, 0xa8, 0x8a, 0xd1,
+	0x75, 0xf5, 0xc7, 0xfd, 0x3f, 0x06, 0xd0, 0x37, 0x8f, 0xbd, 0x62, 0xe2, 0xe8, 0x27, 0xe8, 0x4d,
+	0x31, 0x78, 0x74, 0xbd, 0x4a, 0xd4, 0xab, 0xbf, 0x08, 0xec, 0x0f, 0x66, 0x48, 0x99, 0xd9, 0x3e,
+	0x87, 0x22, 0x38, 0x5d, 0x61, 0xc8, 0xe8, 0x76, 0x55, 0xbb, 0x89, 0x7f, 0xdb, 0x77, 0x5a, 0xc9,
+	0xe6, 0xfe, 0x04, 0xac, 0xd6, 0x50, 0x5e, 0x74, 0x77, 0x86, 0x95, 0x02, 0xed, 0xb6, 0x3f, 0x6c,
+	0x29, 0x9d, 0x7b, 0x7d, 0x0d, 0xa8, 0xca, 0x87, 0xd1, 0x9d, 0x99, 0x66, 0x26, 0x7c, 0xdb, 0xbe,
+	0xdb, 0x4e, 0xb8, 0x31, 0x51, 0xcd, 0x94, 0x67, 0x26, 0x5a, 0xe0, 0xe2, 0x33, 0x13, 0x2d, 0xd1,
+	0xef, 0x39, 0x74, 0x08, 0x2b, 0x65, 0x16, 0x8d, 0x6e, 0x35, 0xfd, 0xb4, 0xab, 0x90, 0x74, 0xfb,
+	0x76, 0x1b, 0xd1, 0xdc, 0x19, 0x81, 0x93, 0x45, 0xa6, 0x8b, 0x6e, 0x56, 0xf5, 0x6b, 0x79, 0xbb,
+	0x3d, 0x9a, 0x2d, 0x38, 0x9d, 0x53, 0x99, 0xfd, 0xd6, 0xe5, 0xd4, 0x40, 0xad, 0xeb, 0x72, 0x6a,
+	0x22, 0xd3, 0xce, 0x1c, 0xfa, 0x35, 0xa3, 0x54, 0x25, 0x56, 0x88, 0x36, 0x9a, 0xcc, 0xd4, 0xd3,
+	0x52, 0xfb, 0x5e, 0x6b, 0xf9, 0xcc, 0xf7, 0x47, 0x96, 0xbc, 0xeb, 0x53, 0xe4, 0xb0, 0xee, 0xae,
+	0x57, 0xe9, 0x66, 0xdd, 0x5d, 0xaf, 0x63, 0x98, 0x73, 0x68, 0x17, 0x06, 0x05, 0xba, 0x88, 0x6e,
+	0x34, 0x69, 0x16, 0x49, 0xa8, 0x7d, 0x73, 0xa6, 0x5c, 0xee, 0xc3, 0xcb, 0xa6, 0x97, 0x19, 0x57,
+	0x8d, 0xc1, 0x15, 0xe7, 0xd5, 0x8d, 0x59, 0x62, 0xb9, 0x83, 0x1f, 0x01, 0x26, 0xec, 0x0e, 0x5d,
+	0x6b, 0xd2, 0x9b, 0x3e, 0x8a, 0xeb, 0xc7, 0x0b, 0xe5, 0xa6, 0x7f, 0x86, 0x33, 0x75, 0x2f, 0x39,
+	0xaa, 0xb9, 0x85, 0xc7, 0xd0, 0x05, 0x7b, 0xa3, 0xad, 0x78, 0xee, 0xf8, 0x05, 0x2c, 0x65, 0x6c,
+	0x0d, 0x5d, 0xad, 0x6a, 0x97, 0xb8, 0xa8, 0xed, 0x1c, 0x27, 0x32, 0xd5, 0x4d, 0xaf, 0xb2, 0x52,
+	0x49, 0x5a, 0xd5, 0x5c, 0xaa, 0x29, 0xae, 0xd7, 0x5c, 0xaa, 0x69, 0x66, 0x26, 0x8d, 0xef, 0x2e,
+	0xa8, 0xbf, 0xa8, 0x1e, 0xfc, 0x17, 0x00, 0x00, 0xff, 0xff, 0x07, 0x6f, 0xca, 0x8a, 0xb9, 0x12,
+	0x00, 0x00,
 }
diff --git a/weed/server/volume_grpc_copy.go b/weed/server/volume_grpc_copy.go
index 0cb5bb455..dbcdb1052 100644
--- a/weed/server/volume_grpc_copy.go
+++ b/weed/server/volume_grpc_copy.go
@@ -52,9 +52,13 @@ func (vs *VolumeServer) VolumeCopy(ctx context.Context, req *volume_server_pb.Vo
 			return fmt.Errorf("read volume file status failed, %v", err)
 		}
 
+		// println("source:", volFileInfoResp.String())
+
 		copyFileClient, err := client.CopyFile(ctx, &volume_server_pb.CopyFileRequest{
-			VolumeId:  req.VolumeId,
-			IsIdxFile: true,
+			VolumeId:           req.VolumeId,
+			IsIdxFile:          true,
+			CompactionRevision: volFileInfoResp.CompactionRevision,
+			StopOffset:         volFileInfoResp.IdxFileSize,
 		})
 		if err != nil {
 			return fmt.Errorf("failed to start copying volume %d idx file: %v", req.VolumeId, err)
@@ -66,8 +70,10 @@ func (vs *VolumeServer) VolumeCopy(ctx context.Context, req *volume_server_pb.Vo
 		}
 
 		copyFileClient, err = client.CopyFile(ctx, &volume_server_pb.CopyFileRequest{
-			VolumeId:  req.VolumeId,
-			IsDatFile: true,
+			VolumeId:           req.VolumeId,
+			IsDatFile:          true,
+			CompactionRevision: volFileInfoResp.CompactionRevision,
+			StopOffset:         volFileInfoResp.DatFileSize,
 		})
 		if err != nil {
 			return fmt.Errorf("failed to start copying volume %d dat file: %v", req.VolumeId, err)
@@ -97,7 +103,7 @@ func (vs *VolumeServer) VolumeCopy(ctx context.Context, req *volume_server_pb.Vo
 	}
 
 	return &volume_server_pb.VolumeCopyResponse{
-		LastAppendAtNs:volFileInfoResp.DatFileTimestampSeconds*uint64(time.Second),
+		LastAppendAtNs: volFileInfoResp.DatFileTimestampSeconds * uint64(time.Second),
 	}, err
 }
 
@@ -161,6 +167,7 @@ func (vs *VolumeServer) ReadVolumeFileStatus(ctx context.Context, req *volume_se
 	resp.DatFileTimestampSeconds = uint64(modTime.Unix())
 	resp.IdxFileTimestampSeconds = uint64(modTime.Unix())
 	resp.FileCount = v.FileCount()
+	resp.CompactionRevision = uint32(v.CompactionRevision)
 	return resp, nil
 }
 
@@ -171,7 +178,13 @@ func (vs *VolumeServer) CopyFile(req *volume_server_pb.CopyFileRequest, stream v
 		return fmt.Errorf("not found volume id %d", req.VolumeId)
 	}
 
-	const BufferSize = 1024 * 16
+	if uint32(v.CompactionRevision) != req.CompactionRevision {
+		return fmt.Errorf("volume %d is compacted", req.VolumeId)
+	}
+
+	bytesToRead := int64(req.StopOffset)
+
+	const BufferSize = 1024 * 1024 * 2
 	var fileName = v.FileName()
 	if req.IsDatFile {
 		fileName += ".dat"
@@ -186,19 +199,31 @@ func (vs *VolumeServer) CopyFile(req *volume_server_pb.CopyFileRequest, stream v
 
 	buffer := make([]byte, BufferSize)
 
-	for {
+	for bytesToRead > 0 {
 		bytesread, err := file.Read(buffer)
 
+		// println(fileName, "read", bytesread, "bytes, with target", bytesToRead)
+
 		if err != nil {
 			if err != io.EOF {
 				return err
 			}
+			// println(fileName, "read", bytesread, "bytes, with target", bytesToRead, "err", err.Error())
 			break
 		}
 
-		stream.Send(&volume_server_pb.CopyFileResponse{
+		if int64(bytesread) > bytesToRead {
+			bytesread = int(bytesToRead)
+		}
+		err = stream.Send(&volume_server_pb.CopyFileResponse{
 			FileContent: buffer[:bytesread],
 		})
+		if err != nil {
+			// println("sending", bytesread, "bytes err", err.Error())
+			return err
+		}
+
+		bytesToRead -= int64(bytesread)
 
 	}
 
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 3c222c0aa..61d55447d 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -125,7 +125,7 @@ func (s *Store) Status() []*VolumeInfo {
 				DeletedByteCount: v.nm.DeletedSize(),
 				ReadOnly:         v.readOnly,
 				Ttl:              v.Ttl,
-				CompactRevision:  uint32(v.CompactRevision),
+				CompactRevision:  uint32(v.CompactionRevision),
 			}
 			stats = append(stats, s)
 		}
diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index 616a2aee8..61d982831 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -166,6 +166,6 @@ func (v *Volume) ToVolumeInformationMessage() *master_pb.VolumeInformationMessag
 		ReplicaPlacement: uint32(v.ReplicaPlacement.Byte()),
 		Version:          uint32(v.Version()),
 		Ttl:              v.Ttl.ToUint32(),
-		CompactRevision:  uint32(v.SuperBlock.CompactRevision),
+		CompactRevision:  uint32(v.SuperBlock.CompactionRevision),
 	}
 }
diff --git a/weed/storage/volume_backup.go b/weed/storage/volume_backup.go
index 8b7238a8c..b7ca3c023 100644
--- a/weed/storage/volume_backup.go
+++ b/weed/storage/volume_backup.go
@@ -20,7 +20,7 @@ func (v *Volume) GetVolumeSyncStatus() *volume_server_pb.VolumeSyncStatusRespons
 	}
 	syncStatus.Collection = v.Collection
 	syncStatus.IdxFileSize = v.nm.IndexFileSize()
-	syncStatus.CompactRevision = uint32(v.SuperBlock.CompactRevision)
+	syncStatus.CompactRevision = uint32(v.SuperBlock.CompactionRevision)
 	syncStatus.Ttl = v.SuperBlock.Ttl.String()
 	syncStatus.Replication = v.SuperBlock.ReplicaPlacement.String()
 	return syncStatus
diff --git a/weed/storage/volume_super_block.go b/weed/storage/volume_super_block.go
index cdb668888..164c887e1 100644
--- a/weed/storage/volume_super_block.go
+++ b/weed/storage/volume_super_block.go
@@ -24,12 +24,12 @@ const (
 * Rest bytes: Reserved
  */
 type SuperBlock struct {
-	version          needle.Version
-	ReplicaPlacement *ReplicaPlacement
-	Ttl              *needle.TTL
-	CompactRevision  uint16
-	Extra            *master_pb.SuperBlockExtra
-	extraSize        uint16
+	version            needle.Version
+	ReplicaPlacement   *ReplicaPlacement
+	Ttl                *needle.TTL
+	CompactionRevision uint16
+	Extra              *master_pb.SuperBlockExtra
+	extraSize          uint16
 }
 
 func (s *SuperBlock) BlockSize() int {
@@ -48,7 +48,7 @@ func (s *SuperBlock) Bytes() []byte {
 	header[0] = byte(s.version)
 	header[1] = s.ReplicaPlacement.Byte()
 	s.Ttl.ToBytes(header[2:4])
-	util.Uint16toBytes(header[4:6], s.CompactRevision)
+	util.Uint16toBytes(header[4:6], s.CompactionRevision)
 
 	if s.Extra != nil {
 		extraData, err := proto.Marshal(s.Extra)
@@ -112,7 +112,7 @@ func ReadSuperBlock(dataFile *os.File) (superBlock SuperBlock, err error) {
 		return
 	}
 	superBlock.Ttl = needle.LoadTTLFromBytes(header[2:4])
-	superBlock.CompactRevision = util.BytesToUint16(header[4:6])
+	superBlock.CompactionRevision = util.BytesToUint16(header[4:6])
 	superBlock.extraSize = util.BytesToUint16(header[6:8])
 
 	if superBlock.extraSize > 0 {
diff --git a/weed/storage/volume_vacuum.go b/weed/storage/volume_vacuum.go
index 3287ae391..e31908764 100644
--- a/weed/storage/volume_vacuum.go
+++ b/weed/storage/volume_vacuum.go
@@ -27,7 +27,7 @@ func (v *Volume) Compact(preallocate int64) error {
 
 	filePath := v.FileName()
 	v.lastCompactIndexOffset = v.nm.IndexFileSize()
-	v.lastCompactRevision = v.SuperBlock.CompactRevision
+	v.lastCompactRevision = v.SuperBlock.CompactionRevision
 	glog.V(3).Infof("creating copies for volume %d ,last offset %d...", v.Id, v.lastCompactIndexOffset)
 	return v.copyDataAndGenerateIndexFile(filePath+".cpd", filePath+".cpx", preallocate)
 }
@@ -105,7 +105,7 @@ func fetchCompactRevisionFromDatFile(file *os.File) (compactRevision uint16, err
 	if err != nil {
 		return 0, err
 	}
-	return superBlock.CompactRevision, nil
+	return superBlock.CompactionRevision, nil
 }
 
 func (v *Volume) makeupDiff(newDatFileName, newIdxFileName, oldDatFileName, oldIdxFileName string) (err error) {
@@ -246,7 +246,7 @@ type VolumeFileScanner4Vacuum struct {
 
 func (scanner *VolumeFileScanner4Vacuum) VisitSuperBlock(superBlock SuperBlock) error {
 	scanner.version = superBlock.Version()
-	superBlock.CompactRevision++
+	superBlock.CompactionRevision++
 	_, err := scanner.dst.Write(superBlock.Bytes())
 	scanner.newOffset = int64(superBlock.BlockSize())
 	return err
@@ -321,7 +321,7 @@ func (v *Volume) copyDataBasedOnIndexFile(dstName, idxName string) (err error) {
 	nm := NewBtreeNeedleMap(idx)
 	now := uint64(time.Now().Unix())
 
-	v.SuperBlock.CompactRevision++
+	v.SuperBlock.CompactionRevision++
 	dst.Write(v.SuperBlock.Bytes())
 	newOffset := int64(v.SuperBlock.BlockSize())