From ec8de250e28b3356bb29b273baa557852f3c000b Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Mon, 2 Dec 2019 15:08:28 -0800
Subject: [PATCH] tiered storage: can copy to s3, read from s3

master not aware tiered volume yet, file assigning is not working yet
---
 weed/pb/volume_server.proto                   |  17 +-
 weed/pb/volume_server_pb/volume_server.pb.go  | 534 +++++++++++-------
 .../volume_server_pb/volume_server_helper.go  |   5 +
 weed/server/common.go                         |   7 +-
 weed/server/volume_grpc_tier.go               |  75 ++-
 weed/shell/command_volume_tier.go             |  68 ++-
 weed/storage/backend/backend.go               |  27 +-
 weed/storage/backend/s3_backend/s3_backend.go |  56 +-
 weed/storage/backend/s3_backend/s3_upload.go  |  66 ++-
 weed/storage/disk_location.go                 |   6 +-
 weed/storage/volume.go                        |   3 +
 weed/storage/volume_loading.go                |   7 +-
 weed/storage/volume_tier.go                   | 104 ++++
 13 files changed, 689 insertions(+), 286 deletions(-)
 create mode 100644 weed/pb/volume_server_pb/volume_server_helper.go
 create mode 100644 weed/storage/volume_tier.go

diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index 94af4bea0..81c9901b9 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -68,7 +68,7 @@ service VolumeServer {
     }
 
     // tiered storage
-    rpc VolumeTierCopyDatToRemote (VolumeTierCopyDatToRemoteRequest) returns (VolumeTierCopyDatToRemoteResponse) {
+    rpc VolumeTierCopyDatToRemote (VolumeTierCopyDatToRemoteRequest) returns (stream VolumeTierCopyDatToRemoteResponse) {
     }
 
     // query
@@ -329,18 +329,27 @@ message MemStatus {
 }
 
 // tired storage on volume servers
-message TieredVolume {
+message RemoteFile {
     string backend_type = 1;
-    string backend_name = 2;
-    uint64 version = 3;
+    string backend_id = 2;
+    string key = 3;
+    uint64 offset = 4;
+    uint64 file_size = 5;
+    uint64 modified_time = 6;
+}
+message VolumeTierInfo {
+    repeated RemoteFile files = 1;
 }
 
 message VolumeTierCopyDatToRemoteRequest {
     uint32 volume_id = 1;
     string collection = 2;
     string destination_backend_name = 3;
+    bool keep_local_dat_file = 4;
 }
 message VolumeTierCopyDatToRemoteResponse {
+    int64 processed = 1;
+    float processedPercentage = 2;
 }
 
 // select on volume servers
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index 29d624209..030310644 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -65,7 +65,8 @@ It has these top-level messages:
 	ReadVolumeFileStatusResponse
 	DiskStatus
 	MemStatus
-	TieredVolume
+	RemoteFile
+	VolumeTierInfo
 	VolumeTierCopyDatToRemoteRequest
 	VolumeTierCopyDatToRemoteResponse
 	QueryRequest
@@ -1398,49 +1399,90 @@ func (m *MemStatus) GetStack() uint64 {
 }
 
 // tired storage on volume servers
-type TieredVolume struct {
-	BackendType string `protobuf:"bytes,1,opt,name=backend_type,json=backendType" json:"backend_type,omitempty"`
-	BackendName string `protobuf:"bytes,2,opt,name=backend_name,json=backendName" json:"backend_name,omitempty"`
-	Version     uint64 `protobuf:"varint,3,opt,name=version" json:"version,omitempty"`
+type RemoteFile struct {
+	BackendType  string `protobuf:"bytes,1,opt,name=backend_type,json=backendType" json:"backend_type,omitempty"`
+	BackendId    string `protobuf:"bytes,2,opt,name=backend_id,json=backendId" json:"backend_id,omitempty"`
+	Key          string `protobuf:"bytes,3,opt,name=key" json:"key,omitempty"`
+	Offset       uint64 `protobuf:"varint,4,opt,name=offset" json:"offset,omitempty"`
+	FileSize     uint64 `protobuf:"varint,5,opt,name=file_size,json=fileSize" json:"file_size,omitempty"`
+	ModifiedTime uint64 `protobuf:"varint,6,opt,name=modified_time,json=modifiedTime" json:"modified_time,omitempty"`
 }
 
-func (m *TieredVolume) Reset()                    { *m = TieredVolume{} }
-func (m *TieredVolume) String() string            { return proto.CompactTextString(m) }
-func (*TieredVolume) ProtoMessage()               {}
-func (*TieredVolume) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{56} }
+func (m *RemoteFile) Reset()                    { *m = RemoteFile{} }
+func (m *RemoteFile) String() string            { return proto.CompactTextString(m) }
+func (*RemoteFile) ProtoMessage()               {}
+func (*RemoteFile) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{56} }
 
-func (m *TieredVolume) GetBackendType() string {
+func (m *RemoteFile) GetBackendType() string {
 	if m != nil {
 		return m.BackendType
 	}
 	return ""
 }
 
-func (m *TieredVolume) GetBackendName() string {
+func (m *RemoteFile) GetBackendId() string {
 	if m != nil {
-		return m.BackendName
+		return m.BackendId
 	}
 	return ""
 }
 
-func (m *TieredVolume) GetVersion() uint64 {
+func (m *RemoteFile) GetKey() string {
 	if m != nil {
-		return m.Version
+		return m.Key
+	}
+	return ""
+}
+
+func (m *RemoteFile) GetOffset() uint64 {
+	if m != nil {
+		return m.Offset
 	}
 	return 0
 }
 
+func (m *RemoteFile) GetFileSize() uint64 {
+	if m != nil {
+		return m.FileSize
+	}
+	return 0
+}
+
+func (m *RemoteFile) GetModifiedTime() uint64 {
+	if m != nil {
+		return m.ModifiedTime
+	}
+	return 0
+}
+
+type VolumeTierInfo struct {
+	Files []*RemoteFile `protobuf:"bytes,1,rep,name=files" json:"files,omitempty"`
+}
+
+func (m *VolumeTierInfo) Reset()                    { *m = VolumeTierInfo{} }
+func (m *VolumeTierInfo) String() string            { return proto.CompactTextString(m) }
+func (*VolumeTierInfo) ProtoMessage()               {}
+func (*VolumeTierInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{57} }
+
+func (m *VolumeTierInfo) GetFiles() []*RemoteFile {
+	if m != nil {
+		return m.Files
+	}
+	return nil
+}
+
 type VolumeTierCopyDatToRemoteRequest 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"`
 	DestinationBackendName string `protobuf:"bytes,3,opt,name=destination_backend_name,json=destinationBackendName" json:"destination_backend_name,omitempty"`
+	KeepLocalDatFile       bool   `protobuf:"varint,4,opt,name=keep_local_dat_file,json=keepLocalDatFile" json:"keep_local_dat_file,omitempty"`
 }
 
 func (m *VolumeTierCopyDatToRemoteRequest) Reset()         { *m = VolumeTierCopyDatToRemoteRequest{} }
 func (m *VolumeTierCopyDatToRemoteRequest) String() string { return proto.CompactTextString(m) }
 func (*VolumeTierCopyDatToRemoteRequest) ProtoMessage()    {}
 func (*VolumeTierCopyDatToRemoteRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{57}
+	return fileDescriptor0, []int{58}
 }
 
 func (m *VolumeTierCopyDatToRemoteRequest) GetVolumeId() uint32 {
@@ -1464,14 +1506,37 @@ func (m *VolumeTierCopyDatToRemoteRequest) GetDestinationBackendName() string {
 	return ""
 }
 
+func (m *VolumeTierCopyDatToRemoteRequest) GetKeepLocalDatFile() bool {
+	if m != nil {
+		return m.KeepLocalDatFile
+	}
+	return false
+}
+
 type VolumeTierCopyDatToRemoteResponse struct {
+	Processed           int64   `protobuf:"varint,1,opt,name=processed" json:"processed,omitempty"`
+	ProcessedPercentage float32 `protobuf:"fixed32,2,opt,name=processedPercentage" json:"processedPercentage,omitempty"`
 }
 
 func (m *VolumeTierCopyDatToRemoteResponse) Reset()         { *m = VolumeTierCopyDatToRemoteResponse{} }
 func (m *VolumeTierCopyDatToRemoteResponse) String() string { return proto.CompactTextString(m) }
 func (*VolumeTierCopyDatToRemoteResponse) ProtoMessage()    {}
 func (*VolumeTierCopyDatToRemoteResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{58}
+	return fileDescriptor0, []int{59}
+}
+
+func (m *VolumeTierCopyDatToRemoteResponse) GetProcessed() int64 {
+	if m != nil {
+		return m.Processed
+	}
+	return 0
+}
+
+func (m *VolumeTierCopyDatToRemoteResponse) GetProcessedPercentage() float32 {
+	if m != nil {
+		return m.ProcessedPercentage
+	}
+	return 0
 }
 
 // select on volume servers
@@ -1486,7 +1551,7 @@ type QueryRequest struct {
 func (m *QueryRequest) Reset()                    { *m = QueryRequest{} }
 func (m *QueryRequest) String() string            { return proto.CompactTextString(m) }
 func (*QueryRequest) ProtoMessage()               {}
-func (*QueryRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{59} }
+func (*QueryRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{60} }
 
 func (m *QueryRequest) GetSelections() []string {
 	if m != nil {
@@ -1532,7 +1597,7 @@ type QueryRequest_Filter struct {
 func (m *QueryRequest_Filter) Reset()                    { *m = QueryRequest_Filter{} }
 func (m *QueryRequest_Filter) String() string            { return proto.CompactTextString(m) }
 func (*QueryRequest_Filter) ProtoMessage()               {}
-func (*QueryRequest_Filter) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{59, 0} }
+func (*QueryRequest_Filter) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{60, 0} }
 
 func (m *QueryRequest_Filter) GetField() string {
 	if m != nil {
@@ -1567,7 +1632,7 @@ func (m *QueryRequest_InputSerialization) Reset()         { *m = QueryRequest_In
 func (m *QueryRequest_InputSerialization) String() string { return proto.CompactTextString(m) }
 func (*QueryRequest_InputSerialization) ProtoMessage()    {}
 func (*QueryRequest_InputSerialization) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 1}
+	return fileDescriptor0, []int{60, 1}
 }
 
 func (m *QueryRequest_InputSerialization) GetCompressionType() string {
@@ -1615,7 +1680,7 @@ func (m *QueryRequest_InputSerialization_CSVInput) Reset() {
 func (m *QueryRequest_InputSerialization_CSVInput) String() string { return proto.CompactTextString(m) }
 func (*QueryRequest_InputSerialization_CSVInput) ProtoMessage()    {}
 func (*QueryRequest_InputSerialization_CSVInput) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 1, 0}
+	return fileDescriptor0, []int{60, 1, 0}
 }
 
 func (m *QueryRequest_InputSerialization_CSVInput) GetFileHeaderInfo() string {
@@ -1677,7 +1742,7 @@ func (m *QueryRequest_InputSerialization_JSONInput) Reset() {
 func (m *QueryRequest_InputSerialization_JSONInput) String() string { return proto.CompactTextString(m) }
 func (*QueryRequest_InputSerialization_JSONInput) ProtoMessage()    {}
 func (*QueryRequest_InputSerialization_JSONInput) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 1, 1}
+	return fileDescriptor0, []int{60, 1, 1}
 }
 
 func (m *QueryRequest_InputSerialization_JSONInput) GetType() string {
@@ -1698,7 +1763,7 @@ func (m *QueryRequest_InputSerialization_ParquetInput) String() string {
 }
 func (*QueryRequest_InputSerialization_ParquetInput) ProtoMessage() {}
 func (*QueryRequest_InputSerialization_ParquetInput) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 1, 2}
+	return fileDescriptor0, []int{60, 1, 2}
 }
 
 type QueryRequest_OutputSerialization struct {
@@ -1710,7 +1775,7 @@ func (m *QueryRequest_OutputSerialization) Reset()         { *m = QueryRequest_O
 func (m *QueryRequest_OutputSerialization) String() string { return proto.CompactTextString(m) }
 func (*QueryRequest_OutputSerialization) ProtoMessage()    {}
 func (*QueryRequest_OutputSerialization) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 2}
+	return fileDescriptor0, []int{60, 2}
 }
 
 func (m *QueryRequest_OutputSerialization) GetCsvOutput() *QueryRequest_OutputSerialization_CSVOutput {
@@ -1743,7 +1808,7 @@ func (m *QueryRequest_OutputSerialization_CSVOutput) String() string {
 }
 func (*QueryRequest_OutputSerialization_CSVOutput) ProtoMessage() {}
 func (*QueryRequest_OutputSerialization_CSVOutput) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 2, 0}
+	return fileDescriptor0, []int{60, 2, 0}
 }
 
 func (m *QueryRequest_OutputSerialization_CSVOutput) GetQuoteFields() string {
@@ -1793,7 +1858,7 @@ func (m *QueryRequest_OutputSerialization_JSONOutput) String() string {
 }
 func (*QueryRequest_OutputSerialization_JSONOutput) ProtoMessage() {}
 func (*QueryRequest_OutputSerialization_JSONOutput) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{59, 2, 1}
+	return fileDescriptor0, []int{60, 2, 1}
 }
 
 func (m *QueryRequest_OutputSerialization_JSONOutput) GetRecordDelimiter() string {
@@ -1810,7 +1875,7 @@ type QueriedStripe struct {
 func (m *QueriedStripe) Reset()                    { *m = QueriedStripe{} }
 func (m *QueriedStripe) String() string            { return proto.CompactTextString(m) }
 func (*QueriedStripe) ProtoMessage()               {}
-func (*QueriedStripe) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{60} }
+func (*QueriedStripe) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{61} }
 
 func (m *QueriedStripe) GetRecords() []byte {
 	if m != nil {
@@ -1876,7 +1941,8 @@ func init() {
 	proto.RegisterType((*ReadVolumeFileStatusResponse)(nil), "volume_server_pb.ReadVolumeFileStatusResponse")
 	proto.RegisterType((*DiskStatus)(nil), "volume_server_pb.DiskStatus")
 	proto.RegisterType((*MemStatus)(nil), "volume_server_pb.MemStatus")
-	proto.RegisterType((*TieredVolume)(nil), "volume_server_pb.TieredVolume")
+	proto.RegisterType((*RemoteFile)(nil), "volume_server_pb.RemoteFile")
+	proto.RegisterType((*VolumeTierInfo)(nil), "volume_server_pb.VolumeTierInfo")
 	proto.RegisterType((*VolumeTierCopyDatToRemoteRequest)(nil), "volume_server_pb.VolumeTierCopyDatToRemoteRequest")
 	proto.RegisterType((*VolumeTierCopyDatToRemoteResponse)(nil), "volume_server_pb.VolumeTierCopyDatToRemoteResponse")
 	proto.RegisterType((*QueryRequest)(nil), "volume_server_pb.QueryRequest")
@@ -1932,7 +1998,7 @@ type VolumeServerClient interface {
 	VolumeEcShardRead(ctx context.Context, in *VolumeEcShardReadRequest, opts ...grpc.CallOption) (VolumeServer_VolumeEcShardReadClient, error)
 	VolumeEcBlobDelete(ctx context.Context, in *VolumeEcBlobDeleteRequest, opts ...grpc.CallOption) (*VolumeEcBlobDeleteResponse, error)
 	// tiered storage
-	VolumeTierCopyDatToRemote(ctx context.Context, in *VolumeTierCopyDatToRemoteRequest, opts ...grpc.CallOption) (*VolumeTierCopyDatToRemoteResponse, error)
+	VolumeTierCopyDatToRemote(ctx context.Context, in *VolumeTierCopyDatToRemoteRequest, opts ...grpc.CallOption) (VolumeServer_VolumeTierCopyDatToRemoteClient, error)
 	// query
 	Query(ctx context.Context, in *QueryRequest, opts ...grpc.CallOption) (VolumeServer_QueryClient, error)
 }
@@ -2271,17 +2337,40 @@ func (c *volumeServerClient) VolumeEcBlobDelete(ctx context.Context, in *VolumeE
 	return out, nil
 }
 
-func (c *volumeServerClient) VolumeTierCopyDatToRemote(ctx context.Context, in *VolumeTierCopyDatToRemoteRequest, opts ...grpc.CallOption) (*VolumeTierCopyDatToRemoteResponse, error) {
-	out := new(VolumeTierCopyDatToRemoteResponse)
-	err := grpc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeTierCopyDatToRemote", in, out, c.cc, opts...)
+func (c *volumeServerClient) VolumeTierCopyDatToRemote(ctx context.Context, in *VolumeTierCopyDatToRemoteRequest, opts ...grpc.CallOption) (VolumeServer_VolumeTierCopyDatToRemoteClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[4], c.cc, "/volume_server_pb.VolumeServer/VolumeTierCopyDatToRemote", opts...)
 	if err != nil {
 		return nil, err
 	}
-	return out, nil
+	x := &volumeServerVolumeTierCopyDatToRemoteClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type VolumeServer_VolumeTierCopyDatToRemoteClient interface {
+	Recv() (*VolumeTierCopyDatToRemoteResponse, error)
+	grpc.ClientStream
+}
+
+type volumeServerVolumeTierCopyDatToRemoteClient struct {
+	grpc.ClientStream
+}
+
+func (x *volumeServerVolumeTierCopyDatToRemoteClient) Recv() (*VolumeTierCopyDatToRemoteResponse, error) {
+	m := new(VolumeTierCopyDatToRemoteResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
 }
 
 func (c *volumeServerClient) Query(ctx context.Context, in *QueryRequest, opts ...grpc.CallOption) (VolumeServer_QueryClient, error) {
-	stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[4], c.cc, "/volume_server_pb.VolumeServer/Query", opts...)
+	stream, err := grpc.NewClientStream(ctx, &_VolumeServer_serviceDesc.Streams[5], c.cc, "/volume_server_pb.VolumeServer/Query", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -2345,7 +2434,7 @@ type VolumeServerServer interface {
 	VolumeEcShardRead(*VolumeEcShardReadRequest, VolumeServer_VolumeEcShardReadServer) error
 	VolumeEcBlobDelete(context.Context, *VolumeEcBlobDeleteRequest) (*VolumeEcBlobDeleteResponse, error)
 	// tiered storage
-	VolumeTierCopyDatToRemote(context.Context, *VolumeTierCopyDatToRemoteRequest) (*VolumeTierCopyDatToRemoteResponse, error)
+	VolumeTierCopyDatToRemote(*VolumeTierCopyDatToRemoteRequest, VolumeServer_VolumeTierCopyDatToRemoteServer) error
 	// query
 	Query(*QueryRequest, VolumeServer_QueryServer) error
 }
@@ -2834,22 +2923,25 @@ func _VolumeServer_VolumeEcBlobDelete_Handler(srv interface{}, ctx context.Conte
 	return interceptor(ctx, in, info, handler)
 }
 
-func _VolumeServer_VolumeTierCopyDatToRemote_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(VolumeTierCopyDatToRemoteRequest)
-	if err := dec(in); err != nil {
-		return nil, err
+func _VolumeServer_VolumeTierCopyDatToRemote_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(VolumeTierCopyDatToRemoteRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
 	}
-	if interceptor == nil {
-		return srv.(VolumeServerServer).VolumeTierCopyDatToRemote(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/volume_server_pb.VolumeServer/VolumeTierCopyDatToRemote",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(VolumeServerServer).VolumeTierCopyDatToRemote(ctx, req.(*VolumeTierCopyDatToRemoteRequest))
-	}
-	return interceptor(ctx, in, info, handler)
+	return srv.(VolumeServerServer).VolumeTierCopyDatToRemote(m, &volumeServerVolumeTierCopyDatToRemoteServer{stream})
+}
+
+type VolumeServer_VolumeTierCopyDatToRemoteServer interface {
+	Send(*VolumeTierCopyDatToRemoteResponse) error
+	grpc.ServerStream
+}
+
+type volumeServerVolumeTierCopyDatToRemoteServer struct {
+	grpc.ServerStream
+}
+
+func (x *volumeServerVolumeTierCopyDatToRemoteServer) Send(m *VolumeTierCopyDatToRemoteResponse) error {
+	return x.ServerStream.SendMsg(m)
 }
 
 func _VolumeServer_Query_Handler(srv interface{}, stream grpc.ServerStream) error {
@@ -2965,10 +3057,6 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 			MethodName: "VolumeEcBlobDelete",
 			Handler:    _VolumeServer_VolumeEcBlobDelete_Handler,
 		},
-		{
-			MethodName: "VolumeTierCopyDatToRemote",
-			Handler:    _VolumeServer_VolumeTierCopyDatToRemote_Handler,
-		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
@@ -2991,6 +3079,11 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 			Handler:       _VolumeServer_VolumeEcShardRead_Handler,
 			ServerStreams: true,
 		},
+		{
+			StreamName:    "VolumeTierCopyDatToRemote",
+			Handler:       _VolumeServer_VolumeTierCopyDatToRemote_Handler,
+			ServerStreams: true,
+		},
 		{
 			StreamName:    "Query",
 			Handler:       _VolumeServer_Query_Handler,
@@ -3003,169 +3096,176 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("volume_server.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 2613 bytes of a gzipped FileDescriptorProto
+	// 2735 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xd4, 0x3a, 0xcd, 0x73, 0x1c, 0x47,
-	0xf5, 0x5a, 0xaf, 0x3e, 0x76, 0xdf, 0xae, 0x2c, 0xb9, 0x25, 0x4b, 0xeb, 0xb1, 0x25, 0xcb, 0xe3,
-	0x24, 0x96, 0xed, 0x44, 0x76, 0xe4, 0xdf, 0x8f, 0x98, 0x84, 0x00, 0xb6, 0x6c, 0x83, 0x49, 0x2c,
-	0x93, 0x91, 0x62, 0x02, 0x4e, 0x31, 0xd5, 0x9a, 0x69, 0x59, 0x83, 0x66, 0xa6, 0xc7, 0x33, 0x3d,
-	0xb2, 0xd7, 0x05, 0xa7, 0x50, 0xdc, 0xf8, 0x03, 0x72, 0xe6, 0xce, 0x81, 0x0b, 0x7f, 0x00, 0x17,
-	0xfe, 0x00, 0xb8, 0x72, 0xe1, 0xcc, 0x81, 0x1b, 0x55, 0x5c, 0xa8, 0xfe, 0x98, 0xd9, 0xf9, 0xd4,
-	0x8e, 0x62, 0x57, 0x51, 0xdc, 0x66, 0x5f, 0xbf, 0xef, 0x7e, 0xaf, 0xfb, 0xf5, 0x7b, 0x0b, 0x0b,
-	0x47, 0xd4, 0x8d, 0x3d, 0x62, 0x46, 0x24, 0x3c, 0x22, 0xe1, 0x46, 0x10, 0x52, 0x46, 0xd1, 0x7c,
-	0x0e, 0x68, 0x06, 0x7b, 0xfa, 0x0d, 0x40, 0x77, 0x31, 0xb3, 0x0e, 0xee, 0x11, 0x97, 0x30, 0x62,
-	0x90, 0xe7, 0x31, 0x89, 0x18, 0x3a, 0x07, 0x9d, 0x7d, 0xc7, 0x25, 0xa6, 0x63, 0x47, 0x83, 0xd6,
-	0x5a, 0x7b, 0xbd, 0x6b, 0xcc, 0xf0, 0xdf, 0x0f, 0xed, 0x48, 0x7f, 0x0c, 0x0b, 0x39, 0x82, 0x28,
-	0xa0, 0x7e, 0x44, 0xd0, 0x6d, 0x98, 0x09, 0x49, 0x14, 0xbb, 0x4c, 0x12, 0xf4, 0x36, 0x57, 0x37,
-	0x8a, 0xb2, 0x36, 0x52, 0x92, 0xd8, 0x65, 0x46, 0x82, 0xae, 0x7f, 0xd5, 0x82, 0x7e, 0x76, 0x05,
-	0x2d, 0xc3, 0x8c, 0x12, 0x3e, 0x68, 0xad, 0xb5, 0xd6, 0xbb, 0xc6, 0xb4, 0x94, 0x8d, 0x96, 0x60,
-	0x3a, 0x62, 0x98, 0xc5, 0xd1, 0xe0, 0xd4, 0x5a, 0x6b, 0x7d, 0xca, 0x50, 0xbf, 0xd0, 0x22, 0x4c,
-	0x91, 0x30, 0xa4, 0xe1, 0xa0, 0x2d, 0xd0, 0xe5, 0x0f, 0x84, 0x60, 0x32, 0x72, 0x5e, 0x91, 0xc1,
-	0xe4, 0x5a, 0x6b, 0x7d, 0xd6, 0x10, 0xdf, 0x68, 0x00, 0x33, 0x47, 0x24, 0x8c, 0x1c, 0xea, 0x0f,
-	0xa6, 0x04, 0x38, 0xf9, 0xa9, 0xcf, 0xc0, 0xd4, 0x7d, 0x2f, 0x60, 0x43, 0xfd, 0x03, 0x18, 0x3c,
-	0xc1, 0x56, 0x1c, 0x7b, 0x4f, 0x84, 0xfa, 0x5b, 0x07, 0xc4, 0x3a, 0x4c, 0xdc, 0x72, 0x1e, 0xba,
-	0xca, 0x28, 0xa5, 0xdb, 0xac, 0xd1, 0x91, 0x80, 0x87, 0xb6, 0xfe, 0x7d, 0x38, 0x57, 0x41, 0xa8,
-	0xdc, 0x73, 0x19, 0x66, 0x9f, 0xe1, 0x70, 0x0f, 0x3f, 0x23, 0x66, 0x88, 0x99, 0x43, 0x05, 0x75,
-	0xcb, 0xe8, 0x2b, 0xa0, 0xc1, 0x61, 0xfa, 0x53, 0xd0, 0x72, 0x1c, 0xa8, 0x17, 0x60, 0x8b, 0x35,
-	0x11, 0x8e, 0xd6, 0xa0, 0x17, 0x84, 0x04, 0xbb, 0x2e, 0xb5, 0x30, 0x23, 0xc2, 0x3f, 0x6d, 0x23,
-	0x0b, 0xd2, 0x57, 0xe0, 0x7c, 0x25, 0x73, 0xa9, 0xa0, 0x7e, 0xbb, 0xa0, 0x3d, 0xf5, 0x3c, 0xa7,
-	0x91, 0x68, 0xfd, 0x42, 0x49, 0x6b, 0x41, 0xa9, 0xf8, 0x7e, 0xbb, 0xb0, 0xea, 0x12, 0xec, 0xc7,
-	0x41, 0x23, 0xc6, 0x45, 0x8d, 0x13, 0xd2, 0x94, 0xf3, 0xb2, 0x0c, 0x9b, 0x2d, 0xea, 0xba, 0xc4,
-	0x62, 0x0e, 0xf5, 0x13, 0xb6, 0xab, 0x00, 0x56, 0x0a, 0x54, 0x41, 0x94, 0x81, 0xe8, 0x1a, 0x0c,
-	0xca, 0xa4, 0x8a, 0xed, 0xdf, 0x5a, 0x70, 0xf6, 0x8e, 0x72, 0x9a, 0x14, 0xdc, 0x68, 0x03, 0xf2,
-	0x22, 0x4f, 0x15, 0x45, 0x16, 0x37, 0xa8, 0x5d, 0xda, 0x20, 0x8e, 0x11, 0x92, 0xc0, 0x75, 0x2c,
-	0x2c, 0x58, 0x4c, 0x0a, 0x16, 0x59, 0x10, 0x9a, 0x87, 0x36, 0x63, 0xae, 0x88, 0xdc, 0xae, 0xc1,
-	0x3f, 0xd1, 0x26, 0x2c, 0x79, 0xc4, 0xa3, 0xe1, 0xd0, 0xf4, 0x70, 0x60, 0x7a, 0xf8, 0xa5, 0xc9,
-	0xc3, 0xdc, 0xf4, 0xf6, 0x06, 0xd3, 0x42, 0x3f, 0x24, 0x57, 0x1f, 0xe1, 0xe0, 0x11, 0x7e, 0xb9,
-	0xe3, 0xbc, 0x22, 0x8f, 0xf6, 0xf4, 0x01, 0x2c, 0x15, 0xed, 0x53, 0xa6, 0x7f, 0x0b, 0x96, 0x25,
-	0x64, 0x67, 0xe8, 0x5b, 0x3b, 0x22, 0xb7, 0x1a, 0x6d, 0xd4, 0xbf, 0x5b, 0x30, 0x28, 0x13, 0xaa,
-	0xc8, 0x7f, 0x5d, 0xaf, 0x9d, 0xd8, 0x27, 0x17, 0xa1, 0xc7, 0xb0, 0xe3, 0x9a, 0x74, 0x7f, 0x3f,
-	0x22, 0x4c, 0x38, 0x62, 0xd2, 0x00, 0x0e, 0x7a, 0x2c, 0x20, 0xe8, 0x2a, 0xcc, 0x5b, 0x32, 0xfa,
-	0xcd, 0x90, 0x1c, 0x39, 0xe2, 0x34, 0x98, 0x11, 0x8a, 0xcd, 0x59, 0x49, 0x56, 0x48, 0x30, 0xd2,
-	0x61, 0xd6, 0xb1, 0x5f, 0x9a, 0xe2, 0x38, 0x12, 0x87, 0x49, 0x47, 0x70, 0xeb, 0x39, 0xf6, 0xcb,
-	0x07, 0x8e, 0x4b, 0xb8, 0x47, 0xf5, 0x27, 0x70, 0x41, 0x1a, 0xff, 0xd0, 0xb7, 0x42, 0xe2, 0x11,
-	0x9f, 0x61, 0x77, 0x8b, 0x06, 0xc3, 0x46, 0x61, 0x73, 0x0e, 0x3a, 0x91, 0xe3, 0x5b, 0xc4, 0xf4,
-	0xe5, 0xa1, 0x36, 0x69, 0xcc, 0x88, 0xdf, 0xdb, 0x91, 0x7e, 0x17, 0x56, 0x6a, 0xf8, 0x2a, 0xcf,
-	0x5e, 0x82, 0xbe, 0x50, 0xcc, 0xa2, 0x3e, 0x23, 0x3e, 0x13, 0xbc, 0xfb, 0x46, 0x8f, 0xc3, 0xb6,
-	0x24, 0x48, 0x7f, 0x1f, 0x90, 0xe4, 0xf1, 0x88, 0xc6, 0x7e, 0xb3, 0x74, 0x3e, 0x0b, 0x0b, 0x39,
-	0x12, 0x15, 0x1b, 0xb7, 0x60, 0x51, 0x82, 0x3f, 0xf7, 0xbd, 0xc6, 0xbc, 0x96, 0xe1, 0x6c, 0x81,
-	0x48, 0x71, 0xdb, 0x4c, 0x84, 0xe4, 0xaf, 0x9d, 0x63, 0x99, 0x2d, 0x25, 0x1a, 0xe4, 0x6f, 0x1e,
-	0x71, 0x72, 0x49, 0x85, 0x71, 0x78, 0x68, 0x10, 0x6c, 0x53, 0xdf, 0x1d, 0x36, 0x3e, 0xb9, 0x2a,
-	0x28, 0x15, 0xdf, 0xdf, 0xb7, 0xe0, 0x4c, 0x72, 0xa4, 0x35, 0xdc, 0xcd, 0x13, 0x86, 0x73, 0xbb,
-	0x36, 0x9c, 0x27, 0x47, 0xe1, 0xbc, 0x0e, 0xf3, 0x11, 0x8d, 0x43, 0x8b, 0x98, 0x36, 0x66, 0xd8,
-	0xf4, 0xa9, 0x4d, 0x54, 0xb4, 0x9f, 0x96, 0xf0, 0x7b, 0x98, 0xe1, 0x6d, 0x6a, 0x13, 0xfd, 0x7b,
-	0xc9, 0x66, 0xe7, 0xa2, 0xe4, 0x2a, 0x9c, 0x71, 0x71, 0xc4, 0x4c, 0x1c, 0x04, 0xc4, 0xb7, 0x4d,
-	0xcc, 0x78, 0xa8, 0xb5, 0x44, 0xa8, 0x9d, 0xe6, 0x0b, 0x77, 0x04, 0xfc, 0x0e, 0xdb, 0x8e, 0xf4,
-	0xbf, 0xb4, 0x60, 0x8e, 0xd3, 0xf2, 0xd0, 0x6e, 0x64, 0xef, 0x3c, 0xb4, 0xc9, 0x4b, 0xa6, 0x0c,
-	0xe5, 0x9f, 0xe8, 0x06, 0x2c, 0xa8, 0x1c, 0x72, 0xa8, 0x3f, 0x4a, 0xaf, 0xb6, 0x3c, 0x8d, 0x46,
-	0x4b, 0x69, 0x86, 0x5d, 0x84, 0x5e, 0xc4, 0x68, 0x90, 0x64, 0xeb, 0xa4, 0xcc, 0x56, 0x0e, 0x52,
-	0xd9, 0x9a, 0xf7, 0xe9, 0x54, 0x85, 0x4f, 0xfb, 0x4e, 0x64, 0x12, 0xcb, 0x94, 0x5a, 0x89, 0x7c,
-	0xef, 0x18, 0xe0, 0x44, 0xf7, 0x2d, 0xe9, 0x0d, 0xfd, 0xff, 0x61, 0x7e, 0x64, 0x55, 0xf3, 0xdc,
-	0xf9, 0xaa, 0x95, 0x1c, 0x87, 0xbb, 0xd8, 0x71, 0x77, 0x88, 0x6f, 0x93, 0xf0, 0x35, 0x73, 0x1a,
-	0xdd, 0x84, 0x45, 0xc7, 0x76, 0x89, 0xc9, 0x1c, 0x8f, 0xd0, 0x98, 0x99, 0x11, 0xb1, 0xa8, 0x6f,
-	0x47, 0x89, 0x7f, 0xf8, 0xda, 0xae, 0x5c, 0xda, 0x91, 0x2b, 0xfa, 0xaf, 0xd3, 0xb3, 0x35, 0xab,
-	0xc5, 0xa8, 0xaa, 0xf0, 0x09, 0xe1, 0x0c, 0x0f, 0x08, 0xb6, 0x49, 0xa8, 0xcc, 0xe8, 0x4b, 0xe0,
-	0x0f, 0x05, 0x8c, 0x7b, 0x58, 0x21, 0xed, 0x51, 0x7b, 0x28, 0x34, 0xea, 0x1b, 0x20, 0x41, 0x77,
-	0xa9, 0x3d, 0x14, 0x87, 0x5c, 0x64, 0x8a, 0x20, 0xb1, 0x0e, 0x62, 0xff, 0x50, 0x68, 0xd3, 0x31,
-	0x7a, 0x4e, 0xf4, 0x29, 0x8e, 0xd8, 0x16, 0x07, 0xe9, 0x7f, 0x6c, 0x25, 0x59, 0xc6, 0xd5, 0x30,
-	0x88, 0x45, 0x9c, 0xa3, 0xff, 0x82, 0x3b, 0x38, 0x85, 0xca, 0x86, 0x5c, 0x75, 0xa9, 0x12, 0x06,
-	0xc9, 0x35, 0x75, 0x17, 0x89, 0x95, 0x51, 0x92, 0xe7, 0x15, 0x57, 0x49, 0xfe, 0x65, 0x72, 0xc8,
-	0xde, 0xb7, 0x76, 0x0e, 0x70, 0x68, 0x47, 0x3f, 0x20, 0x3e, 0x09, 0x31, 0x7b, 0x23, 0x97, 0xbe,
-	0xbe, 0x06, 0xab, 0x75, 0xdc, 0x95, 0xfc, 0xa7, 0xc9, 0xe5, 0x91, 0x60, 0x18, 0x64, 0x2f, 0x76,
-	0x5c, 0xfb, 0x8d, 0x88, 0xff, 0xa4, 0x68, 0x5c, 0xca, 0x5c, 0xc5, 0xcf, 0x35, 0x38, 0x13, 0x0a,
-	0x10, 0x33, 0x23, 0x8e, 0x90, 0xd6, 0xfb, 0xb3, 0xc6, 0x9c, 0x5a, 0x10, 0x84, 0xbc, 0xee, 0xff,
-	0x53, 0x1a, 0x01, 0x09, 0xb7, 0x37, 0x76, 0x2c, 0x9e, 0x87, 0xee, 0x48, 0x7c, 0x5b, 0x88, 0xef,
-	0x44, 0x4a, 0x2e, 0x8f, 0x4e, 0x8b, 0x06, 0x43, 0x93, 0x58, 0xf2, 0x1e, 0x16, 0x5b, 0xdd, 0x31,
-	0x7a, 0x1c, 0x78, 0xdf, 0x12, 0xd7, 0xf0, 0x09, 0xce, 0xc8, 0x34, 0x1a, 0xf2, 0x46, 0xa8, 0xdd,
-	0x78, 0x01, 0xe7, 0xf3, 0xab, 0xcd, 0xaf, 0xa7, 0xd7, 0x32, 0x52, 0x5f, 0x2d, 0x86, 0x41, 0xe1,
-	0x8e, 0x3b, 0x2a, 0xaa, 0xdd, 0xf8, 0x3e, 0x7f, 0x3d, 0xbd, 0x56, 0x8a, 0x0e, 0xc9, 0x17, 0x05,
-	0x5f, 0x14, 0xd5, 0x3e, 0x41, 0x71, 0x70, 0xbc, 0xe0, 0x8b, 0xc5, 0xd0, 0x2d, 0x56, 0x10, 0x5f,
-	0xa7, 0xe7, 0xa2, 0xc2, 0xe0, 0xf7, 0x77, 0xe3, 0xf3, 0x48, 0xc9, 0x15, 0xee, 0x98, 0x35, 0x66,
-	0x94, 0x58, 0xfe, 0xc0, 0x54, 0xf7, 0x90, 0xac, 0xcf, 0xd5, 0xaf, 0xdc, 0x53, 0xb2, 0xad, 0x9e,
-	0x92, 0xc9, 0x13, 0xf9, 0x90, 0x0c, 0x45, 0xac, 0x4d, 0xca, 0x27, 0xf2, 0x27, 0x64, 0xa8, 0x6f,
-	0x17, 0x32, 0x45, 0xaa, 0xa6, 0x72, 0x0e, 0xc1, 0x24, 0x0f, 0x52, 0x75, 0x54, 0x8b, 0x6f, 0xb4,
-	0x02, 0xe0, 0x44, 0xa6, 0x2d, 0xf6, 0x5c, 0x2a, 0xd5, 0x31, 0xba, 0x8e, 0x0a, 0x02, 0x5b, 0xff,
-	0x6d, 0x26, 0xf5, 0xee, 0xba, 0x74, 0xef, 0x0d, 0x46, 0x65, 0xd6, 0x8a, 0x76, 0xce, 0x8a, 0xec,
-	0x5b, 0x79, 0x32, 0xff, 0x56, 0xce, 0x24, 0x51, 0x56, 0x1d, 0xb5, 0x33, 0x1f, 0xc2, 0x79, 0x6e,
-	0xb0, 0xc4, 0x10, 0x55, 0x72, 0xf3, 0x97, 0xc4, 0x3f, 0x4e, 0xc1, 0x85, 0x6a, 0xe2, 0x26, 0xaf,
-	0x89, 0x8f, 0x40, 0x4b, 0xab, 0x75, 0x7e, 0xa5, 0x44, 0x0c, 0x7b, 0x41, 0x7a, 0xa9, 0xc8, 0xbb,
-	0x67, 0x59, 0x95, 0xee, 0xbb, 0xc9, 0x7a, 0x72, 0xb3, 0x94, 0x4a, 0xfd, 0x76, 0xa9, 0xd4, 0xe7,
-	0x02, 0x6c, 0xcc, 0xea, 0x04, 0xc8, 0xda, 0x65, 0xd9, 0xc6, 0xac, 0x4e, 0x40, 0x4a, 0x2c, 0x04,
-	0xc8, 0xa8, 0xe9, 0x29, 0x7c, 0x21, 0x60, 0x05, 0x40, 0x95, 0x25, 0xb1, 0x9f, 0x3c, 0x5d, 0xba,
-	0xb2, 0x28, 0x89, 0xfd, 0xda, 0xea, 0x6a, 0xa6, 0xb6, 0xba, 0xca, 0x6f, 0x7f, 0xa7, 0x74, 0x43,
-	0x7c, 0x01, 0x70, 0xcf, 0x89, 0x0e, 0xa5, 0x93, 0x79, 0x39, 0x67, 0x3b, 0xa1, 0x7a, 0x2f, 0xf3,
-	0x4f, 0x0e, 0xc1, 0xae, 0xab, 0x5c, 0xc7, 0x3f, 0x79, 0xf8, 0xc6, 0x11, 0xb1, 0x95, 0x77, 0xc4,
-	0x37, 0x87, 0xed, 0x87, 0x84, 0x28, 0x07, 0x88, 0x6f, 0xfd, 0x77, 0x2d, 0xe8, 0x3e, 0x22, 0x9e,
-	0xe2, 0xbc, 0x0a, 0xf0, 0x8c, 0x86, 0x34, 0x66, 0x8e, 0x4f, 0x64, 0xf5, 0x39, 0x65, 0x64, 0x20,
-	0xdf, 0x5c, 0x8e, 0x48, 0x4d, 0xe2, 0xee, 0x2b, 0x67, 0x8a, 0x6f, 0x0e, 0x3b, 0x20, 0x38, 0x50,
-	0xfe, 0x13, 0xdf, 0x68, 0x11, 0xa6, 0x22, 0x86, 0xad, 0x43, 0xe1, 0xac, 0x49, 0x43, 0xfe, 0xd0,
-	0x7d, 0xe8, 0xef, 0x3a, 0x24, 0x24, 0x2a, 0xe0, 0x78, 0x59, 0xb8, 0x87, 0xad, 0x43, 0x5e, 0x28,
-	0xb3, 0x61, 0x40, 0x94, 0x2b, 0x7a, 0x0a, 0xb6, 0x3b, 0x0c, 0x72, 0x28, 0x3e, 0xf6, 0x88, 0xca,
-	0xa9, 0x04, 0x65, 0x1b, 0x7b, 0xb9, 0x2e, 0x93, 0xca, 0xa9, 0x24, 0x73, 0xbe, 0x6e, 0xc1, 0x9a,
-	0xaa, 0x46, 0x1c, 0x12, 0xf2, 0xbb, 0xe7, 0x1e, 0x66, 0xbb, 0xd4, 0x20, 0x1e, 0x7d, 0x43, 0x09,
-	0x7d, 0x1b, 0x06, 0x36, 0x89, 0x98, 0xe3, 0x8b, 0xf7, 0x84, 0x99, 0x53, 0x55, 0xbe, 0x37, 0x96,
-	0x32, 0xeb, 0x77, 0x47, 0x5a, 0xeb, 0x97, 0xe1, 0xd2, 0x31, 0xaa, 0xa9, 0xe4, 0xfe, 0x57, 0x1f,
-	0xfa, 0x9f, 0xc5, 0x24, 0x1c, 0x66, 0x5a, 0x2d, 0x11, 0x51, 0xc2, 0x93, 0x5e, 0x61, 0x06, 0xc2,
-	0xa3, 0x7e, 0x3f, 0xa4, 0x9e, 0x99, 0xb6, 0x13, 0x4f, 0x09, 0x94, 0x1e, 0x07, 0x3e, 0x90, 0x2d,
-	0x45, 0xf4, 0x31, 0x4c, 0xef, 0x3b, 0x2e, 0x23, 0xb2, 0x81, 0xd7, 0xdb, 0x7c, 0xbb, 0xdc, 0x3a,
-	0xcc, 0xca, 0xdc, 0x78, 0x20, 0x90, 0x0d, 0x45, 0x84, 0xf6, 0x60, 0xc1, 0xf1, 0x03, 0x51, 0x3e,
-	0x86, 0x0e, 0x76, 0x9d, 0x57, 0xa3, 0x66, 0x41, 0x6f, 0xf3, 0xfd, 0x31, 0xbc, 0x1e, 0x72, 0xca,
-	0x9d, 0x2c, 0xa1, 0x81, 0x9c, 0x12, 0x0c, 0x11, 0x58, 0xa4, 0x31, 0x2b, 0x0b, 0x99, 0x12, 0x42,
-	0x36, 0xc7, 0x08, 0x79, 0x2c, 0x48, 0xf3, 0x52, 0x16, 0x68, 0x19, 0xa8, 0x6d, 0xc3, 0xb4, 0x34,
-	0x8e, 0xc7, 0xeb, 0xbe, 0x43, 0xdc, 0xa4, 0x05, 0x2a, 0x7f, 0xf0, 0xc8, 0xa2, 0x01, 0x09, 0xb1,
-	0x6f, 0xab, 0xad, 0x4f, 0x7e, 0x72, 0xfc, 0x23, 0xec, 0xc6, 0xc9, 0x26, 0xcb, 0x1f, 0xda, 0x5f,
-	0xa7, 0x00, 0x95, 0x2d, 0x4c, 0x3a, 0x20, 0x21, 0x89, 0x78, 0x54, 0x66, 0x43, 0x7d, 0x2e, 0x03,
-	0x17, 0xe1, 0xfe, 0x13, 0xe8, 0x5a, 0xd1, 0x91, 0x29, 0x5c, 0x22, 0x64, 0xf6, 0x36, 0x3f, 0x3c,
-	0xb1, 0x4b, 0x37, 0xb6, 0x76, 0x9e, 0x08, 0xa8, 0xd1, 0xb1, 0xa2, 0x23, 0xf1, 0x85, 0x7e, 0x06,
-	0xf0, 0x8b, 0x88, 0xfa, 0x8a, 0xb3, 0xdc, 0xf8, 0x8f, 0x4e, 0xce, 0xf9, 0x47, 0x3b, 0x8f, 0xb7,
-	0x25, 0xeb, 0x2e, 0x67, 0x27, 0x79, 0x5b, 0x30, 0x1b, 0xe0, 0xf0, 0x79, 0x4c, 0x98, 0x62, 0x2f,
-	0x63, 0xe1, 0xbb, 0x27, 0x67, 0xff, 0x63, 0xc9, 0x46, 0x4a, 0xe8, 0x07, 0x99, 0x5f, 0xda, 0x9f,
-	0x4f, 0x41, 0x27, 0xb1, 0x8b, 0x57, 0xa0, 0x22, 0xc2, 0xe5, 0x3b, 0xcc, 0x74, 0xfc, 0x7d, 0xaa,
-	0x3c, 0x7a, 0x9a, 0xc3, 0xe5, 0x53, 0xec, 0xa1, 0xbf, 0x4f, 0xb9, 0xef, 0x43, 0x62, 0xd1, 0xd0,
-	0xe6, 0xf7, 0xbd, 0xe3, 0x39, 0x3c, 0xec, 0xe5, 0x5e, 0xce, 0x49, 0xf8, 0xbd, 0x04, 0x8c, 0xae,
-	0xc0, 0x9c, 0xd8, 0xf6, 0x0c, 0x66, 0x3b, 0xe1, 0x49, 0xdc, 0x0c, 0xe2, 0x55, 0x98, 0x7f, 0x1e,
-	0x53, 0x46, 0x4c, 0xeb, 0x00, 0x87, 0xd8, 0x62, 0x34, 0x7d, 0x11, 0xcd, 0x09, 0xf8, 0x56, 0x0a,
-	0x46, 0xff, 0x07, 0x4b, 0x12, 0x95, 0x44, 0x16, 0x0e, 0x52, 0x0a, 0x12, 0xaa, 0x82, 0x79, 0x51,
-	0xac, 0xde, 0x17, 0x8b, 0x5b, 0xc9, 0x1a, 0xd2, 0xa0, 0x63, 0x51, 0xcf, 0x23, 0x3e, 0x8b, 0xc4,
-	0xa9, 0xda, 0x35, 0xd2, 0xdf, 0xe8, 0x0e, 0xac, 0x60, 0xd7, 0xa5, 0x2f, 0x4c, 0x41, 0x69, 0x9b,
-	0x25, 0xeb, 0x66, 0x44, 0x3d, 0xa3, 0x09, 0xa4, 0xcf, 0x04, 0x8e, 0x91, 0x37, 0x54, 0xbb, 0x08,
-	0xdd, 0x74, 0x1f, 0xf9, 0xe9, 0x9d, 0x09, 0x48, 0xf1, 0xad, 0x9d, 0x86, 0x7e, 0x76, 0x27, 0xb4,
-	0x7f, 0xb6, 0x61, 0xa1, 0x22, 0xa9, 0xd0, 0x53, 0x00, 0x1e, 0xad, 0x32, 0xb5, 0x54, 0xb8, 0x7e,
-	0xe7, 0xe4, 0xc9, 0xc9, 0xe3, 0x55, 0x82, 0x0d, 0x1e, 0xfd, 0xf2, 0x13, 0xfd, 0x1c, 0x7a, 0x22,
-	0x62, 0x15, 0x77, 0x19, 0xb2, 0x1f, 0x7f, 0x03, 0xee, 0xdc, 0x56, 0xc5, 0x5e, 0xe4, 0x80, 0xfc,
-	0xd6, 0xfe, 0xde, 0x82, 0x6e, 0x2a, 0x98, 0xdf, 0x33, 0x72, 0xa3, 0xc4, 0x5e, 0x47, 0xc9, 0x55,
-	0x24, 0x60, 0x0f, 0x04, 0xe8, 0x7f, 0x32, 0x94, 0xb4, 0x0f, 0x00, 0x46, 0xf6, 0x57, 0x9a, 0xd0,
-	0xaa, 0x34, 0x41, 0xbf, 0x0a, 0xb3, 0xdc, 0xb3, 0x0e, 0xb1, 0x77, 0x58, 0xe8, 0x04, 0xe2, 0x9a,
-	0x95, 0x38, 0x91, 0x2a, 0xa6, 0x93, 0x9f, 0x9b, 0x7f, 0x18, 0x40, 0x3f, 0xdb, 0x04, 0x40, 0x5f,
-	0x42, 0x2f, 0x33, 0xb4, 0x42, 0x6f, 0x95, 0x37, 0xad, 0x3c, 0x04, 0xd3, 0xde, 0x1e, 0x83, 0xa5,
-	0xae, 0xc4, 0x09, 0xe4, 0xc3, 0x99, 0xd2, 0xe4, 0x07, 0x5d, 0x2b, 0x53, 0xd7, 0xcd, 0x95, 0xb4,
-	0xeb, 0x8d, 0x70, 0x53, 0x79, 0x0c, 0x16, 0x2a, 0x46, 0x39, 0xe8, 0xdd, 0x31, 0x5c, 0x72, 0xe3,
-	0x24, 0xed, 0xbd, 0x86, 0xd8, 0xa9, 0xd4, 0xe7, 0x80, 0xca, 0x73, 0x1e, 0x74, 0x7d, 0x2c, 0x9b,
-	0xd1, 0x1c, 0x49, 0x7b, 0xb7, 0x19, 0x72, 0xad, 0xa1, 0x72, 0x02, 0x34, 0xd6, 0xd0, 0xdc, 0x8c,
-	0x69, 0xac, 0xa1, 0x85, 0xb1, 0xd2, 0x04, 0x3a, 0x84, 0xf9, 0xe2, 0x74, 0x08, 0x5d, 0xad, 0x9b,
-	0x66, 0x96, 0x86, 0x4f, 0xda, 0xb5, 0x26, 0xa8, 0xa9, 0x30, 0x02, 0xa7, 0xf3, 0xd3, 0x18, 0x74,
-	0xa5, 0x4c, 0x5f, 0x39, 0x8f, 0xd2, 0xd6, 0xc7, 0x23, 0x66, 0x6d, 0x2a, 0x4e, 0x68, 0xaa, 0x6c,
-	0xaa, 0x19, 0xff, 0x54, 0xd9, 0x54, 0x37, 0xf0, 0xd1, 0x27, 0xd0, 0x2f, 0x93, 0xb6, 0x7f, 0x61,
-	0x72, 0x81, 0x36, 0xea, 0xd8, 0x54, 0x8f, 0x4e, 0xb4, 0x1b, 0x8d, 0xf1, 0x13, 0xd9, 0x37, 0x5b,
-	0x3c, 0xd7, 0x33, 0x03, 0x8c, 0xaa, 0x5c, 0x2f, 0x8f, 0x44, 0xaa, 0x72, 0xbd, 0x6a, 0x0a, 0x32,
-	0x81, 0xf6, 0x60, 0x36, 0x37, 0xd2, 0x40, 0xef, 0xd4, 0x51, 0xe6, 0x7b, 0x21, 0xda, 0x95, 0xb1,
-	0x78, 0xa9, 0x0c, 0x33, 0x39, 0xbd, 0xd4, 0x71, 0x55, 0xab, 0x5c, 0xfe, 0xbc, 0x7a, 0x67, 0x1c,
-	0x5a, 0x2e, 0x95, 0x4b, 0x83, 0x8f, 0xca, 0x54, 0xae, 0x1b, 0xac, 0x54, 0xa6, 0x72, 0xfd, 0x2c,
-	0x65, 0x02, 0xfd, 0x14, 0x60, 0x34, 0x9c, 0x40, 0x97, 0xeb, 0xa8, 0xb3, 0xbb, 0xff, 0xd6, 0xf1,
-	0x48, 0x29, 0xeb, 0x17, 0xb0, 0x58, 0xd5, 0x33, 0x40, 0x15, 0x89, 0x7f, 0x4c, 0x63, 0x42, 0xdb,
-	0x68, 0x8a, 0x9e, 0x0a, 0xfe, 0x1c, 0x3a, 0xc9, 0x60, 0x01, 0x5d, 0x2a, 0x53, 0x17, 0x46, 0x29,
-	0x9a, 0x7e, 0x1c, 0x4a, 0x26, 0x80, 0xbd, 0x24, 0x57, 0x47, 0x1d, 0xff, 0xfa, 0x5c, 0x2d, 0xcd,
-	0x26, 0xea, 0x73, 0xb5, 0x3c, 0x40, 0x10, 0xe2, 0xd2, 0x60, 0xc8, 0x36, 0xc8, 0xeb, 0x83, 0xa1,
-	0xa2, 0xff, 0x5f, 0x1f, 0x0c, 0x95, 0x3d, 0xf7, 0x09, 0xf4, 0x2b, 0x58, 0xaa, 0xee, 0x8b, 0xa3,
-	0xda, 0x8c, 0xaf, 0xe9, 0xcf, 0x6b, 0x37, 0x9b, 0x13, 0xa4, 0xe2, 0x5f, 0x25, 0xe7, 0x53, 0xa1,
-	0x2f, 0x5e, 0x7f, 0x3e, 0x55, 0x77, 0xe7, 0xb5, 0x1b, 0x8d, 0xf1, 0xcb, 0xa9, 0x97, 0x6d, 0x40,
-	0xd7, 0x7b, 0xbb, 0xa2, 0xd7, 0x5e, 0xef, 0xed, 0xca, 0x9e, 0xb6, 0xc8, 0x8f, 0xaa, 0xe6, 0x72,
-	0x55, 0x7e, 0x1c, 0xd3, 0xfd, 0xd6, 0x36, 0x9a, 0xa2, 0xe7, 0xae, 0xef, 0x72, 0xf7, 0x18, 0x8d,
-	0xd5, 0x3f, 0x77, 0x32, 0xbf, 0xd7, 0x10, 0xbb, 0x7e, 0x77, 0x93, 0x93, 0x7a, 0xac, 0x01, 0x85,
-	0x13, 0xfb, 0x46, 0x63, 0xfc, 0x54, 0x76, 0x90, 0x8c, 0x8c, 0x33, 0x9d, 0x5f, 0x74, 0x6d, 0x0c,
-	0x9f, 0x4c, 0xe7, 0x5a, 0xbb, 0xde, 0x08, 0xb7, 0x2a, 0x7b, 0xb3, 0xbd, 0xd8, 0xe3, 0xe2, 0xa9,
-	0xd4, 0x40, 0x3e, 0x2e, 0x9e, 0x2a, 0xda, 0xbb, 0x13, 0xe8, 0x37, 0xa3, 0x59, 0x60, 0xb9, 0x53,
-	0x84, 0x36, 0x6b, 0xcf, 0x82, 0xda, 0x8e, 0x97, 0x76, 0xeb, 0x44, 0x34, 0xa9, 0x22, 0x9f, 0xc2,
-	0x94, 0x78, 0x6b, 0xa1, 0xd5, 0xe3, 0x1f, 0x61, 0xda, 0xc5, 0xea, 0xf5, 0xf4, 0x29, 0xc1, 0x3d,
-	0xb9, 0x37, 0x2d, 0xfe, 0x22, 0x77, 0xeb, 0x3f, 0x01, 0x00, 0x00, 0xff, 0xff, 0x81, 0x26, 0xf7,
-	0x49, 0x39, 0x27, 0x00, 0x00,
+	0xf5, 0x5a, 0xaf, 0x64, 0xed, 0xbe, 0x5d, 0x59, 0x72, 0x4b, 0x91, 0x37, 0x23, 0x4b, 0x56, 0x26,
+	0x5f, 0x92, 0x13, 0xcb, 0x8e, 0xf2, 0xfb, 0x91, 0x90, 0x10, 0xc0, 0x96, 0x6c, 0x30, 0x89, 0xe5,
+	0x64, 0xe4, 0x98, 0x40, 0x52, 0x4c, 0xb5, 0x66, 0x5a, 0xd6, 0xa0, 0x99, 0xe9, 0xf1, 0x4c, 0xaf,
+	0xe2, 0x75, 0xc1, 0x29, 0x1c, 0xb8, 0xf0, 0x07, 0x70, 0xe6, 0xce, 0x89, 0x2a, 0xaa, 0xb8, 0x72,
+	0xc9, 0x1f, 0x00, 0x57, 0x2e, 0x9c, 0x39, 0x70, 0xa3, 0x8a, 0x0b, 0xd5, 0x5f, 0xb3, 0xf3, 0xa9,
+	0x1d, 0xc5, 0xae, 0xa2, 0xb8, 0xf5, 0xbc, 0x7e, 0x1f, 0xfd, 0x5e, 0xbf, 0xf7, 0xfa, 0x75, 0xbf,
+	0x81, 0xc5, 0x13, 0xea, 0x0f, 0x03, 0x62, 0x27, 0x24, 0x3e, 0x21, 0xf1, 0x56, 0x14, 0x53, 0x46,
+	0xd1, 0x42, 0x0e, 0x68, 0x47, 0x07, 0xe6, 0x75, 0x40, 0xb7, 0x30, 0x73, 0x8e, 0x76, 0x89, 0x4f,
+	0x18, 0xb1, 0xc8, 0xe3, 0x21, 0x49, 0x18, 0x7a, 0x11, 0x3a, 0x87, 0x9e, 0x4f, 0x6c, 0xcf, 0x4d,
+	0x06, 0xad, 0xf5, 0xf6, 0x46, 0xd7, 0x9a, 0xe5, 0xdf, 0x77, 0xdd, 0xc4, 0xbc, 0x0f, 0x8b, 0x39,
+	0x82, 0x24, 0xa2, 0x61, 0x42, 0xd0, 0xbb, 0x30, 0x1b, 0x93, 0x64, 0xe8, 0x33, 0x49, 0xd0, 0xdb,
+	0x5e, 0xdb, 0x2a, 0xca, 0xda, 0x4a, 0x49, 0x86, 0x3e, 0xb3, 0x34, 0xba, 0xf9, 0x55, 0x0b, 0xfa,
+	0xd9, 0x19, 0x74, 0x09, 0x66, 0x95, 0xf0, 0x41, 0x6b, 0xbd, 0xb5, 0xd1, 0xb5, 0xce, 0x4b, 0xd9,
+	0x68, 0x19, 0xce, 0x27, 0x0c, 0xb3, 0x61, 0x32, 0x38, 0xb7, 0xde, 0xda, 0x98, 0xb1, 0xd4, 0x17,
+	0x5a, 0x82, 0x19, 0x12, 0xc7, 0x34, 0x1e, 0xb4, 0x05, 0xba, 0xfc, 0x40, 0x08, 0xa6, 0x13, 0xef,
+	0x29, 0x19, 0x4c, 0xaf, 0xb7, 0x36, 0xe6, 0x2c, 0x31, 0x46, 0x03, 0x98, 0x3d, 0x21, 0x71, 0xe2,
+	0xd1, 0x70, 0x30, 0x23, 0xc0, 0xfa, 0xd3, 0x9c, 0x85, 0x99, 0xdb, 0x41, 0xc4, 0x46, 0xe6, 0x3b,
+	0x30, 0x78, 0x88, 0x9d, 0xe1, 0x30, 0x78, 0x28, 0x96, 0xbf, 0x73, 0x44, 0x9c, 0x63, 0x6d, 0x96,
+	0x15, 0xe8, 0x2a, 0xa5, 0xd4, 0xda, 0xe6, 0xac, 0x8e, 0x04, 0xdc, 0x75, 0xcd, 0xef, 0xc3, 0x8b,
+	0x15, 0x84, 0xca, 0x3c, 0x2f, 0xc3, 0xdc, 0x23, 0x1c, 0x1f, 0xe0, 0x47, 0xc4, 0x8e, 0x31, 0xf3,
+	0xa8, 0xa0, 0x6e, 0x59, 0x7d, 0x05, 0xb4, 0x38, 0xcc, 0xfc, 0x1c, 0x8c, 0x1c, 0x07, 0x1a, 0x44,
+	0xd8, 0x61, 0x4d, 0x84, 0xa3, 0x75, 0xe8, 0x45, 0x31, 0xc1, 0xbe, 0x4f, 0x1d, 0xcc, 0x88, 0xb0,
+	0x4f, 0xdb, 0xca, 0x82, 0xcc, 0x55, 0x58, 0xa9, 0x64, 0x2e, 0x17, 0x68, 0xbe, 0x5b, 0x58, 0x3d,
+	0x0d, 0x02, 0xaf, 0x91, 0x68, 0xf3, 0x72, 0x69, 0xd5, 0x82, 0x52, 0xf1, 0xfd, 0x76, 0x61, 0xd6,
+	0x27, 0x38, 0x1c, 0x46, 0x8d, 0x18, 0x17, 0x57, 0xac, 0x49, 0x53, 0xce, 0x97, 0xa4, 0xdb, 0xec,
+	0x50, 0xdf, 0x27, 0x0e, 0xf3, 0x68, 0xa8, 0xd9, 0xae, 0x01, 0x38, 0x29, 0x50, 0x39, 0x51, 0x06,
+	0x62, 0x1a, 0x30, 0x28, 0x93, 0x2a, 0xb6, 0x7f, 0x6b, 0xc1, 0x0b, 0x37, 0x95, 0xd1, 0xa4, 0xe0,
+	0x46, 0x1b, 0x90, 0x17, 0x79, 0xae, 0x28, 0xb2, 0xb8, 0x41, 0xed, 0xd2, 0x06, 0x71, 0x8c, 0x98,
+	0x44, 0xbe, 0xe7, 0x60, 0xc1, 0x62, 0x5a, 0xb0, 0xc8, 0x82, 0xd0, 0x02, 0xb4, 0x19, 0xf3, 0x85,
+	0xe7, 0x76, 0x2d, 0x3e, 0x44, 0xdb, 0xb0, 0x1c, 0x90, 0x80, 0xc6, 0x23, 0x3b, 0xc0, 0x91, 0x1d,
+	0xe0, 0x27, 0x36, 0x77, 0x73, 0x3b, 0x38, 0x18, 0x9c, 0x17, 0xeb, 0x43, 0x72, 0xf6, 0x1e, 0x8e,
+	0xee, 0xe1, 0x27, 0xfb, 0xde, 0x53, 0x72, 0xef, 0xc0, 0x1c, 0xc0, 0x72, 0x51, 0x3f, 0xa5, 0xfa,
+	0xb7, 0xe0, 0x92, 0x84, 0xec, 0x8f, 0x42, 0x67, 0x5f, 0xc4, 0x56, 0xa3, 0x8d, 0xfa, 0x77, 0x0b,
+	0x06, 0x65, 0x42, 0xe5, 0xf9, 0xcf, 0x6a, 0xb5, 0x33, 0xdb, 0xe4, 0x0a, 0xf4, 0x18, 0xf6, 0x7c,
+	0x9b, 0x1e, 0x1e, 0x26, 0x84, 0x09, 0x43, 0x4c, 0x5b, 0xc0, 0x41, 0xf7, 0x05, 0x04, 0x6d, 0xc2,
+	0x82, 0x23, 0xbd, 0xdf, 0x8e, 0xc9, 0x89, 0x27, 0xb2, 0xc1, 0xac, 0x58, 0xd8, 0xbc, 0xa3, 0xa3,
+	0x42, 0x82, 0x91, 0x09, 0x73, 0x9e, 0xfb, 0xc4, 0x16, 0xe9, 0x48, 0x24, 0x93, 0x8e, 0xe0, 0xd6,
+	0xf3, 0xdc, 0x27, 0x77, 0x3c, 0x9f, 0x70, 0x8b, 0x9a, 0x0f, 0xe1, 0xb2, 0x54, 0xfe, 0x6e, 0xe8,
+	0xc4, 0x24, 0x20, 0x21, 0xc3, 0xfe, 0x0e, 0x8d, 0x46, 0x8d, 0xdc, 0xe6, 0x45, 0xe8, 0x24, 0x5e,
+	0xe8, 0x10, 0x3b, 0x94, 0x49, 0x6d, 0xda, 0x9a, 0x15, 0xdf, 0x7b, 0x89, 0x79, 0x0b, 0x56, 0x6b,
+	0xf8, 0x2a, 0xcb, 0xbe, 0x04, 0x7d, 0xb1, 0x30, 0x87, 0x86, 0x8c, 0x84, 0x4c, 0xf0, 0xee, 0x5b,
+	0x3d, 0x0e, 0xdb, 0x91, 0x20, 0xf3, 0x2d, 0x40, 0x92, 0xc7, 0x3d, 0x3a, 0x0c, 0x9b, 0x85, 0xf3,
+	0x0b, 0xb0, 0x98, 0x23, 0x51, 0xbe, 0xf1, 0x36, 0x2c, 0x49, 0xf0, 0xa7, 0x61, 0xd0, 0x98, 0xd7,
+	0x25, 0x78, 0xa1, 0x40, 0xa4, 0xb8, 0x6d, 0x6b, 0x21, 0xf9, 0x63, 0xe7, 0x54, 0x66, 0xcb, 0x7a,
+	0x05, 0xf9, 0x93, 0x47, 0x64, 0x2e, 0xb9, 0x60, 0x1c, 0x1f, 0x5b, 0x04, 0xbb, 0x34, 0xf4, 0x47,
+	0x8d, 0x33, 0x57, 0x05, 0xa5, 0xe2, 0xfb, 0xfb, 0x16, 0x5c, 0xd4, 0x29, 0xad, 0xe1, 0x6e, 0x9e,
+	0xd1, 0x9d, 0xdb, 0xb5, 0xee, 0x3c, 0x3d, 0x76, 0xe7, 0x0d, 0x58, 0x48, 0xe8, 0x30, 0x76, 0x88,
+	0xed, 0x62, 0x86, 0xed, 0x90, 0xba, 0x44, 0x79, 0xfb, 0x05, 0x09, 0xdf, 0xc5, 0x0c, 0xef, 0x51,
+	0x97, 0x98, 0xdf, 0xd3, 0x9b, 0x9d, 0xf3, 0x92, 0x4d, 0xb8, 0xe8, 0xe3, 0x84, 0xd9, 0x38, 0x8a,
+	0x48, 0xe8, 0xda, 0x98, 0x71, 0x57, 0x6b, 0x09, 0x57, 0xbb, 0xc0, 0x27, 0x6e, 0x0a, 0xf8, 0x4d,
+	0xb6, 0x97, 0x98, 0x7f, 0x69, 0xc1, 0x3c, 0xa7, 0xe5, 0xae, 0xdd, 0x48, 0xdf, 0x05, 0x68, 0x93,
+	0x27, 0x4c, 0x29, 0xca, 0x87, 0xe8, 0x3a, 0x2c, 0xaa, 0x18, 0xf2, 0x68, 0x38, 0x0e, 0xaf, 0xb6,
+	0xcc, 0x46, 0xe3, 0xa9, 0x34, 0xc2, 0xae, 0x40, 0x2f, 0x61, 0x34, 0xd2, 0xd1, 0x3a, 0x2d, 0xa3,
+	0x95, 0x83, 0x54, 0xb4, 0xe6, 0x6d, 0x3a, 0x53, 0x61, 0xd3, 0xbe, 0x97, 0xd8, 0xc4, 0xb1, 0xe5,
+	0xaa, 0x44, 0xbc, 0x77, 0x2c, 0xf0, 0x92, 0xdb, 0x8e, 0xb4, 0x86, 0xf9, 0xff, 0xb0, 0x30, 0xd6,
+	0xaa, 0x79, 0xec, 0x7c, 0xd5, 0xd2, 0xe9, 0xf0, 0x01, 0xf6, 0xfc, 0x7d, 0x12, 0xba, 0x24, 0x7e,
+	0xc6, 0x98, 0x46, 0x37, 0x60, 0xc9, 0x73, 0x7d, 0x62, 0x33, 0x2f, 0x20, 0x74, 0xc8, 0xec, 0x84,
+	0x38, 0x34, 0x74, 0x13, 0x6d, 0x1f, 0x3e, 0xf7, 0x40, 0x4e, 0xed, 0xcb, 0x19, 0xf3, 0x57, 0x69,
+	0x6e, 0xcd, 0xae, 0x62, 0x5c, 0x55, 0x84, 0x84, 0x70, 0x86, 0x47, 0x04, 0xbb, 0x24, 0x56, 0x6a,
+	0xf4, 0x25, 0xf0, 0x87, 0x02, 0xc6, 0x2d, 0xac, 0x90, 0x0e, 0xa8, 0x3b, 0x12, 0x2b, 0xea, 0x5b,
+	0x20, 0x41, 0xb7, 0xa8, 0x3b, 0x12, 0x49, 0x2e, 0xb1, 0x85, 0x93, 0x38, 0x47, 0xc3, 0xf0, 0x58,
+	0xac, 0xa6, 0x63, 0xf5, 0xbc, 0xe4, 0x23, 0x9c, 0xb0, 0x1d, 0x0e, 0x32, 0xff, 0xd8, 0xd2, 0x51,
+	0xc6, 0x97, 0x61, 0x11, 0x87, 0x78, 0x27, 0xff, 0x05, 0x73, 0x70, 0x0a, 0x15, 0x0d, 0xb9, 0xea,
+	0x52, 0x05, 0x0c, 0x92, 0x73, 0xea, 0x2c, 0x12, 0x33, 0xe3, 0x20, 0xcf, 0x2f, 0x5c, 0x05, 0xf9,
+	0x17, 0x3a, 0xc9, 0xde, 0x76, 0xf6, 0x8f, 0x70, 0xec, 0x26, 0x3f, 0x20, 0x21, 0x89, 0x31, 0x7b,
+	0x2e, 0x87, 0xbe, 0xb9, 0x0e, 0x6b, 0x75, 0xdc, 0x95, 0xfc, 0xcf, 0xf5, 0xe1, 0xa1, 0x31, 0x2c,
+	0x72, 0x30, 0xf4, 0x7c, 0xf7, 0xb9, 0x88, 0xff, 0xb0, 0xa8, 0x5c, 0xca, 0x5c, 0xf9, 0xcf, 0x55,
+	0xb8, 0x18, 0x0b, 0x10, 0xb3, 0x13, 0x8e, 0x90, 0xd6, 0xfb, 0x73, 0xd6, 0xbc, 0x9a, 0x10, 0x84,
+	0xbc, 0xee, 0xff, 0x73, 0xea, 0x01, 0x9a, 0xdb, 0x73, 0x4b, 0x8b, 0x2b, 0xd0, 0x1d, 0x8b, 0x6f,
+	0x0b, 0xf1, 0x9d, 0x44, 0xc9, 0xe5, 0xde, 0xe9, 0xd0, 0x68, 0x64, 0x13, 0x47, 0x9e, 0xc3, 0x62,
+	0xab, 0x3b, 0x56, 0x8f, 0x03, 0x6f, 0x3b, 0xe2, 0x18, 0x3e, 0x43, 0x8e, 0x4c, 0xbd, 0x21, 0xaf,
+	0x84, 0xda, 0x8d, 0x2f, 0x61, 0x25, 0x3f, 0xdb, 0xfc, 0x78, 0x7a, 0x26, 0x25, 0xcd, 0xb5, 0xa2,
+	0x1b, 0x14, 0xce, 0xb8, 0x93, 0xe2, 0xb2, 0x1b, 0x9f, 0xe7, 0xcf, 0xb6, 0xae, 0xd5, 0xa2, 0x41,
+	0xf2, 0x45, 0xc1, 0x67, 0xc5, 0x65, 0x9f, 0xa1, 0x38, 0x38, 0x5d, 0xf0, 0x95, 0xa2, 0xeb, 0x16,
+	0x2b, 0x88, 0xdf, 0xa6, 0x79, 0x51, 0x61, 0xf0, 0xf3, 0xbb, 0x71, 0x3e, 0x52, 0x72, 0x85, 0x39,
+	0xe6, 0xac, 0x59, 0x25, 0x96, 0x5f, 0x30, 0xd5, 0x39, 0x24, 0xeb, 0x73, 0xf5, 0x95, 0xbb, 0x4a,
+	0xb6, 0xd5, 0x55, 0x52, 0x5f, 0x91, 0x8f, 0xc9, 0x48, 0xf8, 0xda, 0xb4, 0xbc, 0x22, 0x7f, 0x48,
+	0x46, 0xe6, 0x5e, 0x21, 0x52, 0xe4, 0xd2, 0x54, 0xcc, 0x21, 0x98, 0xe6, 0x4e, 0xaa, 0x52, 0xb5,
+	0x18, 0xa3, 0x55, 0x00, 0x2f, 0xb1, 0x5d, 0xb1, 0xe7, 0x72, 0x51, 0x1d, 0xab, 0xeb, 0x29, 0x27,
+	0x70, 0xcd, 0xdf, 0x64, 0x42, 0xef, 0x96, 0x4f, 0x0f, 0x9e, 0xa3, 0x57, 0x66, 0xb5, 0x68, 0xe7,
+	0xb4, 0xc8, 0xde, 0x95, 0xa7, 0xf3, 0x77, 0xe5, 0x4c, 0x10, 0x65, 0x97, 0xa3, 0x76, 0xe6, 0x3d,
+	0x58, 0xe1, 0x0a, 0x4b, 0x0c, 0x51, 0x25, 0x37, 0xbf, 0x49, 0xfc, 0xe3, 0x1c, 0x5c, 0xae, 0x26,
+	0x6e, 0x72, 0x9b, 0x78, 0x1f, 0x8c, 0xb4, 0x5a, 0xe7, 0x47, 0x4a, 0xc2, 0x70, 0x10, 0xa5, 0x87,
+	0x8a, 0x3c, 0x7b, 0x2e, 0xa9, 0xd2, 0xfd, 0x81, 0x9e, 0xd7, 0x27, 0x4b, 0xa9, 0xd4, 0x6f, 0x97,
+	0x4a, 0x7d, 0x2e, 0xc0, 0xc5, 0xac, 0x4e, 0x80, 0xac, 0x5d, 0x2e, 0xb9, 0x98, 0xd5, 0x09, 0x48,
+	0x89, 0x85, 0x00, 0xe9, 0x35, 0x3d, 0x85, 0x2f, 0x04, 0xac, 0x02, 0xa8, 0xb2, 0x64, 0x18, 0xea,
+	0xab, 0x4b, 0x57, 0x16, 0x25, 0xc3, 0xb0, 0xb6, 0xba, 0x9a, 0xad, 0xad, 0xae, 0xf2, 0xdb, 0xdf,
+	0x29, 0x9d, 0x10, 0x9f, 0x01, 0xec, 0x7a, 0xc9, 0xb1, 0x34, 0x32, 0x2f, 0xe7, 0x5c, 0x2f, 0x56,
+	0xf7, 0x65, 0x3e, 0xe4, 0x10, 0xec, 0xfb, 0xca, 0x74, 0x7c, 0xc8, 0xdd, 0x77, 0x98, 0x10, 0x57,
+	0x59, 0x47, 0x8c, 0x39, 0xec, 0x30, 0x26, 0x44, 0x19, 0x40, 0x8c, 0xcd, 0xdf, 0xb5, 0xa0, 0x7b,
+	0x8f, 0x04, 0x8a, 0xf3, 0x1a, 0xc0, 0x23, 0x1a, 0xd3, 0x21, 0xf3, 0x42, 0x22, 0xab, 0xcf, 0x19,
+	0x2b, 0x03, 0xf9, 0xe6, 0x72, 0x44, 0x68, 0x12, 0xff, 0x50, 0x19, 0x53, 0x8c, 0x39, 0xec, 0x88,
+	0xe0, 0x48, 0xd9, 0x4f, 0x8c, 0xd1, 0x12, 0xcc, 0x24, 0x0c, 0x3b, 0xc7, 0xc2, 0x58, 0xd3, 0x96,
+	0xfc, 0x30, 0xff, 0xd4, 0x02, 0xb0, 0x48, 0x40, 0x99, 0xf0, 0x35, 0x5e, 0x15, 0x1e, 0x60, 0xe7,
+	0x98, 0xd7, 0xc9, 0x6c, 0x14, 0x11, 0x65, 0x89, 0x9e, 0x82, 0x3d, 0x18, 0x45, 0x62, 0x87, 0x34,
+	0x8a, 0xca, 0x1f, 0x5d, 0xab, 0xab, 0x20, 0xb2, 0x22, 0xd6, 0xa1, 0xd4, 0xb5, 0xf8, 0x30, 0x93,
+	0x53, 0xe4, 0xb2, 0x75, 0x4e, 0x59, 0x81, 0x6e, 0xd1, 0x15, 0x44, 0x28, 0x0a, 0x3f, 0x78, 0x19,
+	0xe6, 0x02, 0xea, 0x7a, 0x87, 0x1e, 0x71, 0x85, 0xa3, 0x29, 0x55, 0xfa, 0x1a, 0xc8, 0x9d, 0xcb,
+	0xdc, 0x85, 0x0b, 0xaa, 0xb2, 0xf1, 0x48, 0x7c, 0x37, 0x3c, 0xa4, 0x68, 0x1b, 0x66, 0x38, 0x0b,
+	0xfd, 0x04, 0x77, 0xb9, 0xfc, 0x04, 0x37, 0x56, 0xd6, 0x92, 0xa8, 0xe6, 0xd7, 0x2d, 0x58, 0x1f,
+	0xb3, 0xe1, 0xc7, 0xe1, 0x2e, 0x66, 0x0f, 0xa8, 0x44, 0x7c, 0x2e, 0x39, 0xe6, 0x5d, 0x18, 0xb8,
+	0x24, 0x61, 0x5e, 0x28, 0xae, 0x38, 0xb6, 0x36, 0x5f, 0x88, 0x03, 0xa2, 0x0c, 0xb5, 0x9c, 0x99,
+	0xbf, 0x25, 0xa7, 0xf7, 0x70, 0x40, 0xd0, 0x35, 0x58, 0x3c, 0x26, 0x24, 0xb2, 0x7d, 0xea, 0x60,
+	0xdf, 0xd6, 0xd1, 0xa3, 0x2a, 0x80, 0x05, 0x3e, 0xf5, 0x11, 0x9f, 0xd9, 0x95, 0x11, 0x64, 0x26,
+	0xf0, 0xd2, 0x29, 0x9a, 0xa8, 0x0c, 0x72, 0x19, 0xba, 0x51, 0x4c, 0x1d, 0x92, 0x70, 0xef, 0x6a,
+	0x89, 0x84, 0x3e, 0x06, 0xa0, 0x1b, 0xb0, 0x98, 0x7e, 0x7c, 0x4c, 0x62, 0x87, 0xdf, 0xba, 0x1f,
+	0xc9, 0xf7, 0xb4, 0x73, 0x56, 0xd5, 0x94, 0xf9, 0xaf, 0x3e, 0xf4, 0x3f, 0x19, 0x92, 0x78, 0x94,
+	0x79, 0x7c, 0x4a, 0x88, 0xd2, 0x5d, 0xbf, 0x9e, 0x66, 0x20, 0x3c, 0x0f, 0x1c, 0xc6, 0x34, 0xb0,
+	0xd3, 0x07, 0xd6, 0x73, 0x02, 0xa5, 0xc7, 0x81, 0x77, 0xe4, 0x23, 0x2b, 0xfa, 0x00, 0xce, 0x1f,
+	0x7a, 0x3e, 0x23, 0xf2, 0x49, 0xb3, 0xb7, 0xfd, 0x6a, 0x79, 0x27, 0xb3, 0x32, 0xb7, 0xee, 0x08,
+	0x64, 0x4b, 0x11, 0xa1, 0x03, 0x58, 0xf4, 0xc2, 0x48, 0x14, 0xd4, 0xb1, 0x87, 0x7d, 0xef, 0xe9,
+	0xf8, 0xf9, 0xa4, 0xb7, 0xfd, 0xd6, 0x04, 0x5e, 0x77, 0x39, 0xe5, 0x7e, 0x96, 0xd0, 0x42, 0x5e,
+	0x09, 0x86, 0x08, 0x2c, 0xd1, 0x21, 0x2b, 0x0b, 0x99, 0x11, 0x42, 0xb6, 0x27, 0x08, 0xb9, 0x2f,
+	0x48, 0xf3, 0x52, 0x16, 0x69, 0x19, 0x68, 0xec, 0xc1, 0x79, 0xa9, 0x1c, 0x8f, 0xe0, 0x43, 0x8f,
+	0xf8, 0xfa, 0x51, 0x58, 0x7e, 0xf0, 0x53, 0x8a, 0x46, 0x24, 0xc6, 0xa1, 0x0e, 0x46, 0xfd, 0xc9,
+	0xf1, 0x4f, 0xb0, 0x3f, 0xd4, 0x3e, 0x26, 0x3f, 0x8c, 0xbf, 0xce, 0x00, 0x2a, 0x6b, 0xa8, 0xdf,
+	0x84, 0x62, 0x92, 0xf0, 0xbc, 0x99, 0x8d, 0xfe, 0xf9, 0x0c, 0x5c, 0x64, 0x80, 0x1f, 0x43, 0xd7,
+	0x49, 0x4e, 0x6c, 0x61, 0x12, 0x21, 0xb3, 0xb7, 0xfd, 0xde, 0x99, 0x4d, 0xba, 0xb5, 0xb3, 0xff,
+	0x50, 0x40, 0xad, 0x8e, 0x93, 0x9c, 0x88, 0x11, 0xfa, 0x29, 0xc0, 0xcf, 0x13, 0x1a, 0x2a, 0xce,
+	0x72, 0xe3, 0xdf, 0x3f, 0x3b, 0xe7, 0x1f, 0xed, 0xdf, 0xdf, 0x93, 0xac, 0xbb, 0x9c, 0x9d, 0xe4,
+	0xed, 0xc0, 0x5c, 0x84, 0xe3, 0xc7, 0x43, 0xc2, 0x14, 0x7b, 0xe9, 0x0b, 0xdf, 0x3d, 0x3b, 0xfb,
+	0x8f, 0x25, 0x1b, 0x29, 0xa1, 0x1f, 0x65, 0xbe, 0x8c, 0xaf, 0xcf, 0x41, 0x47, 0xeb, 0xc5, 0x6b,
+	0x72, 0xe1, 0xe1, 0xf2, 0x66, 0x6a, 0x7b, 0xe1, 0x21, 0x55, 0x16, 0xbd, 0xc0, 0xe1, 0xf2, 0x72,
+	0x2a, 0xb2, 0xd6, 0x26, 0x2c, 0xc4, 0xc4, 0xa1, 0xb1, 0xcb, 0x2b, 0x20, 0x2f, 0xf0, 0xb8, 0xdb,
+	0xcb, 0xbd, 0x9c, 0x97, 0xf0, 0x5d, 0x0d, 0x46, 0xaf, 0xc3, 0xbc, 0xd8, 0xf6, 0x0c, 0x66, 0x5b,
+	0xf3, 0x24, 0x7e, 0x06, 0x71, 0x13, 0x16, 0x1e, 0x0f, 0x29, 0x23, 0xb6, 0x73, 0x84, 0x63, 0xec,
+	0x30, 0x9a, 0xde, 0x11, 0xe7, 0x05, 0x7c, 0x27, 0x05, 0xa3, 0xff, 0x83, 0x65, 0x89, 0x4a, 0x12,
+	0x07, 0x47, 0x29, 0x05, 0x89, 0xd5, 0x15, 0x62, 0x49, 0xcc, 0xde, 0x16, 0x93, 0x3b, 0x7a, 0x0e,
+	0x19, 0xd0, 0x71, 0x68, 0x10, 0x90, 0x90, 0x25, 0x22, 0x39, 0x77, 0xad, 0xf4, 0x1b, 0xdd, 0x84,
+	0x55, 0xec, 0xfb, 0xf4, 0x4b, 0x5b, 0x50, 0xba, 0x76, 0x49, 0xbb, 0x59, 0x91, 0xc0, 0x0c, 0x81,
+	0xf4, 0x89, 0xc0, 0xb1, 0xf2, 0x8a, 0x1a, 0x57, 0xa0, 0x9b, 0xee, 0x23, 0x3f, 0xcf, 0x32, 0x0e,
+	0x29, 0xc6, 0xc6, 0x05, 0xe8, 0x67, 0x77, 0xc2, 0xf8, 0x67, 0x1b, 0x16, 0x2b, 0x82, 0x0a, 0x7d,
+	0x0e, 0xc0, 0xbd, 0x55, 0x86, 0x96, 0x72, 0xd7, 0xef, 0x9c, 0x3d, 0x38, 0xb9, 0xbf, 0x4a, 0xb0,
+	0xc5, 0xbd, 0x5f, 0x0e, 0xd1, 0xcf, 0xa0, 0x27, 0x3c, 0x56, 0x71, 0x97, 0x2e, 0xfb, 0xc1, 0x37,
+	0xe0, 0xce, 0x75, 0x55, 0xec, 0x45, 0x0c, 0xc8, 0xb1, 0xf1, 0xf7, 0x16, 0x74, 0x53, 0xc1, 0xfc,
+	0x74, 0x96, 0x1b, 0x25, 0xf6, 0x3a, 0xd1, 0xa7, 0xb3, 0x80, 0xdd, 0x11, 0xa0, 0xff, 0x49, 0x57,
+	0x32, 0xde, 0x01, 0x18, 0xeb, 0x5f, 0xa9, 0x42, 0xab, 0x52, 0x05, 0x73, 0x13, 0xe6, 0xb8, 0x65,
+	0x3d, 0xe2, 0xee, 0xb3, 0xd8, 0x8b, 0x44, 0x7b, 0x4b, 0xe2, 0x24, 0xea, 0x7a, 0xa1, 0x3f, 0xb7,
+	0xff, 0x30, 0x80, 0x7e, 0xf6, 0x59, 0x04, 0x7d, 0x01, 0xbd, 0x4c, 0x1b, 0x0f, 0xbd, 0x52, 0xde,
+	0xb4, 0x72, 0x5b, 0xd0, 0x78, 0x75, 0x02, 0x96, 0xba, 0x01, 0x4c, 0xa1, 0x10, 0x2e, 0x96, 0x7a,
+	0x61, 0xe8, 0x6a, 0x99, 0xba, 0xae, 0xd3, 0x66, 0xbc, 0xd1, 0x08, 0x37, 0x95, 0xc7, 0x60, 0xb1,
+	0xa2, 0xb9, 0x85, 0xde, 0x9c, 0xc0, 0x25, 0xd7, 0x60, 0x33, 0xae, 0x35, 0xc4, 0x4e, 0xa5, 0x3e,
+	0x06, 0x54, 0xee, 0x7c, 0xa1, 0x37, 0x26, 0xb2, 0x19, 0x77, 0xd6, 0x8c, 0x37, 0x9b, 0x21, 0xd7,
+	0x2a, 0x2a, 0x7b, 0x62, 0x13, 0x15, 0xcd, 0x75, 0xdd, 0x26, 0x2a, 0x5a, 0x68, 0xb4, 0x4d, 0xa1,
+	0x63, 0x58, 0x28, 0xf6, 0xcb, 0xd0, 0x66, 0x5d, 0x7f, 0xb7, 0xd4, 0x8e, 0x33, 0xae, 0x36, 0x41,
+	0x4d, 0x85, 0x11, 0xb8, 0x90, 0xef, 0x4f, 0xa1, 0xd7, 0xcb, 0xf4, 0x95, 0x1d, 0x3a, 0x63, 0x63,
+	0x32, 0x62, 0x56, 0xa7, 0x62, 0xcf, 0xaa, 0x4a, 0xa7, 0x9a, 0x86, 0x58, 0x95, 0x4e, 0x75, 0x2d,
+	0x30, 0x73, 0x0a, 0xfd, 0x42, 0x37, 0x42, 0x0a, 0xbd, 0x1c, 0xb4, 0x55, 0xc7, 0xa6, 0xba, 0x99,
+	0x64, 0x5c, 0x6f, 0x8c, 0xaf, 0x65, 0xdf, 0x68, 0xf1, 0x58, 0xcf, 0xb4, 0x74, 0xaa, 0x62, 0xbd,
+	0xdc, 0x24, 0xaa, 0x8a, 0xf5, 0xaa, 0xbe, 0xd0, 0x14, 0x3a, 0x80, 0xb9, 0x5c, 0x93, 0x07, 0xbd,
+	0x56, 0x47, 0x99, 0x7f, 0x1d, 0x32, 0x5e, 0x9f, 0x88, 0x97, 0xca, 0xb0, 0x75, 0xf6, 0x52, 0xe9,
+	0xaa, 0x76, 0x71, 0xf9, 0x7c, 0xf5, 0xda, 0x24, 0xb4, 0x5c, 0x28, 0x97, 0x5a, 0x41, 0x95, 0xa1,
+	0x5c, 0xd7, 0x6a, 0xaa, 0x0c, 0xe5, 0xfa, 0xee, 0xd2, 0x14, 0xfa, 0x09, 0xc0, 0xb8, 0x5d, 0x83,
+	0x5e, 0xae, 0xa3, 0xce, 0xee, 0xfe, 0x2b, 0xa7, 0x23, 0xa5, 0xac, 0xbf, 0x84, 0xa5, 0xaa, 0x57,
+	0x14, 0x74, 0xad, 0xea, 0x42, 0x58, 0xfb, 0x54, 0x63, 0x6c, 0x35, 0x45, 0x4f, 0x05, 0x7f, 0x0a,
+	0x1d, 0xdd, 0x6a, 0x41, 0x2f, 0x95, 0xa9, 0x0b, 0xcd, 0x25, 0xc3, 0x3c, 0x0d, 0x25, 0xe3, 0xc0,
+	0x81, 0x8e, 0xd5, 0x71, 0x0f, 0xa4, 0x3e, 0x56, 0x4b, 0xdd, 0x9a, 0xfa, 0x58, 0x2d, 0xb7, 0x54,
+	0x84, 0xb8, 0xd4, 0x19, 0xb2, 0x2d, 0x83, 0x7a, 0x67, 0xa8, 0xe8, 0x88, 0xd4, 0x3b, 0x43, 0x65,
+	0x17, 0x62, 0x0a, 0xfd, 0x12, 0x96, 0xab, 0x3b, 0x05, 0xa8, 0x36, 0xe2, 0x6b, 0x3a, 0x16, 0xc6,
+	0x8d, 0xe6, 0x04, 0xa9, 0xf8, 0xa7, 0x3a, 0x3f, 0x15, 0x3a, 0x05, 0xf5, 0xf9, 0xa9, 0xba, 0x5f,
+	0x61, 0x5c, 0x6f, 0x8c, 0x5f, 0x0e, 0xbd, 0xec, 0x93, 0x7c, 0xbd, 0xb5, 0x2b, 0xba, 0x0f, 0xf5,
+	0xd6, 0xae, 0x7c, 0xe5, 0x17, 0xf1, 0x51, 0xf5, 0xdc, 0x5e, 0x15, 0x1f, 0xa7, 0xf4, 0x03, 0x8c,
+	0xad, 0xa6, 0xe8, 0xb9, 0xe3, 0xbb, 0xfc, 0x9e, 0x8e, 0x26, 0xae, 0x3f, 0x97, 0x99, 0xaf, 0x35,
+	0xc4, 0xae, 0xdf, 0x5d, 0x9d, 0xa9, 0x27, 0x2a, 0x50, 0xc8, 0xd8, 0xd7, 0x1b, 0xe3, 0xa7, 0xb2,
+	0x23, 0xdd, 0x44, 0xcf, 0xbc, 0x85, 0xa3, 0xab, 0x13, 0xf8, 0x64, 0xde, 0xf2, 0x8d, 0x37, 0x1a,
+	0xe1, 0x56, 0x45, 0x6f, 0xf6, 0x75, 0xfa, 0x34, 0x7f, 0x2a, 0x3d, 0xa9, 0x9f, 0xe6, 0x4f, 0x15,
+	0x0f, 0xde, 0x53, 0xe8, 0xd7, 0xe3, 0xee, 0x68, 0xf9, 0xe5, 0x09, 0x6d, 0xd7, 0xe6, 0x82, 0xda,
+	0x07, 0x37, 0xe3, 0xed, 0x33, 0xd1, 0x64, 0xb4, 0xff, 0x08, 0x66, 0xc4, 0x6d, 0x0b, 0xad, 0x9d,
+	0x7e, 0x0d, 0x33, 0xae, 0x54, 0xcf, 0xa7, 0x97, 0x09, 0xce, 0xed, 0xe0, 0xbc, 0xf8, 0x6d, 0xf0,
+	0xed, 0xff, 0x04, 0x00, 0x00, 0xff, 0xff, 0x8a, 0x85, 0xda, 0x2e, 0x4d, 0x28, 0x00, 0x00,
 }
diff --git a/weed/pb/volume_server_pb/volume_server_helper.go b/weed/pb/volume_server_pb/volume_server_helper.go
new file mode 100644
index 000000000..356be27ff
--- /dev/null
+++ b/weed/pb/volume_server_pb/volume_server_helper.go
@@ -0,0 +1,5 @@
+package volume_server_pb
+
+func (m *RemoteFile) BackendName() string {
+	return m.BackendType + "." + m.BackendId
+}
diff --git a/weed/server/common.go b/weed/server/common.go
index e3e16b927..ba5562dfe 100644
--- a/weed/server/common.go
+++ b/weed/server/common.go
@@ -11,15 +11,12 @@ import (
 	"strings"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/storage/needle"
-	"google.golang.org/grpc"
-
-	_ "github.com/chrislusf/seaweedfs/weed/storage/backend/s3_backend"
-
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/stats"
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/chrislusf/seaweedfs/weed/util"
+	"google.golang.org/grpc"
 
 	_ "github.com/chrislusf/seaweedfs/weed/statik"
 	"github.com/gorilla/mux"
diff --git a/weed/server/volume_grpc_tier.go b/weed/server/volume_grpc_tier.go
index cbd344ed0..d3cdd62f2 100644
--- a/weed/server/volume_grpc_tier.go
+++ b/weed/server/volume_grpc_tier.go
@@ -1,9 +1,9 @@
 package weed_server
 
 import (
-	"context"
 	"fmt"
 	"os"
+	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/backend"
@@ -11,28 +11,83 @@ import (
 )
 
 // VolumeTierCopyDatToRemote copy dat file to a remote tier
-func (vs *VolumeServer) VolumeTierCopyDatToRemote(ctx context.Context, req *volume_server_pb.VolumeTierCopyDatToRemoteRequest) (*volume_server_pb.VolumeTierCopyDatToRemoteResponse, error) {
+func (vs *VolumeServer) VolumeTierCopyDatToRemote(req *volume_server_pb.VolumeTierCopyDatToRemoteRequest, stream volume_server_pb.VolumeServer_VolumeTierCopyDatToRemoteServer) error {
 
+	// find existing volume
 	v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
 	if v == nil {
-		return nil, fmt.Errorf("volume %d not found", req.VolumeId)
+		return fmt.Errorf("volume %d not found", req.VolumeId)
 	}
 
+	// verify the collection
 	if v.Collection != req.Collection {
-		return nil, fmt.Errorf("existing collection:%v unexpected input: %v", v.Collection, req.Collection)
+		return fmt.Errorf("existing collection:%v unexpected input: %v", v.Collection, req.Collection)
 	}
 
+	// locate the disk file
 	diskFile, ok := v.DataBackend.(*backend.DiskFile)
 	if !ok {
-		return nil, fmt.Errorf("volume %d is not on local disk", req.VolumeId)
+		return fmt.Errorf("volume %d is not on local disk", req.VolumeId)
 	}
-	err := uploadFileToRemote(ctx, req, diskFile.File)
 
-	return &volume_server_pb.VolumeTierCopyDatToRemoteResponse{}, err
-}
+	// check valid storage backend type
+	backendStorage, found := backend.BackendStorages[req.DestinationBackendName]
+	if !found {
+		var keys []string
+		for key := range backend.BackendStorages {
+			keys = append(keys, key)
+		}
+		return fmt.Errorf("destination %s not found, suppported: %v", req.DestinationBackendName, keys)
+	}
 
-func uploadFileToRemote(ctx context.Context, req *volume_server_pb.VolumeTierCopyDatToRemoteRequest, f *os.File) error {
-	println("copying dat file of", f.Name(), "to remote")
+	// check whether the existing backend storage is the same as requested
+	// if same, skip
+	backendType, backendId := backend.BackendNameToTypeId(req.DestinationBackendName)
+	for _, remoteFile := range v.GetVolumeTierInfo().GetFiles() {
+		if remoteFile.BackendType == backendType && remoteFile.BackendId == backendId {
+			return fmt.Errorf("destination %s already exists", req.DestinationBackendName)
+		}
+	}
+
+	startTime := time.Now()
+	fn := func(progressed int64, percentage float32) error {
+		now := time.Now()
+		if now.Sub(startTime) < time.Second {
+			return nil
+		}
+		startTime = now
+		return stream.Send(&volume_server_pb.VolumeTierCopyDatToRemoteResponse{
+			Processed:           progressed,
+			ProcessedPercentage: percentage,
+		})
+	}
+	// copy the data file
+	key, size, err := backendStorage.CopyFile(diskFile.File, fn)
+	if err != nil {
+		return fmt.Errorf("backend %s copy file %s: %v", req.DestinationBackendName, diskFile.String(), err)
+	}
+
+	// save the remote file to volume tier info
+	v.GetVolumeTierInfo().Files = append(v.GetVolumeTierInfo().GetFiles(), &volume_server_pb.RemoteFile{
+		BackendType:  backendType,
+		BackendId:    backendId,
+		Key:          key,
+		Offset:       0,
+		FileSize:     uint64(size),
+		ModifiedTime: uint64(time.Now().Unix()),
+	})
+
+	if err := v.SaveVolumeTierInfo(); err != nil {
+		return fmt.Errorf("volume %d fail to save remote file info: %v", v.Id, err)
+	}
+
+	if err := v.LoadRemoteFile(); err != nil {
+		return fmt.Errorf("volume %d fail to load remote file: %v", v.Id, err)
+	}
+
+	if !req.KeepLocalDatFile {
+		os.Remove(v.FileName() + ".dat")
+	}
 
 	return nil
 }
diff --git a/weed/shell/command_volume_tier.go b/weed/shell/command_volume_tier.go
index 177d3f30d..9047d1199 100644
--- a/weed/shell/command_volume_tier.go
+++ b/weed/shell/command_volume_tier.go
@@ -25,14 +25,30 @@ func (c *commandVolumeTier) Name() string {
 }
 
 func (c *commandVolumeTier) Help() string {
-	return `copy the dat file of a volume to a remote tier
+	return `move the dat file of a volume to a remote tier
 
-	ec.encode [-collection=""] [-fullPercent=95] [-quietFor=1h]
-	ec.encode [-collection=""] [-volumeId=<volume_id>]
+	volume.tier [-collection=""] [-fullPercent=95] [-quietFor=1h]
+	volume.tier [-collection=""] -volumeId=<volume_id> -dest=<storage_backend> [-keepLocalDatFile]
 
-	This command will:
-	1. freeze one volume
-	2. copy the dat file of a volume to a remote tier
+	e.g.:
+	volume.tier -volumeId=7 -dest=s3
+	volume.tier -volumeId=7 -dest=s3.default
+
+	The <storage_backend> is defined in master.toml.
+	For example, "s3.default" in [storage.backend.s3.default]
+
+	This command will move the dat file of a volume to a remote tier.
+
+	SeaweedFS enables scalable and fast local access to lots of files, 
+	and the cloud storage is slower by cost efficient. How to combine them together?
+
+	Usually the data follows 80/20 rule: only 20% of data is frequently accessed.
+	We can offload the old volumes to the cloud.
+
+	With this, SeaweedFS can be both fast and scalable, and infinite storage space.
+	Just add more local SeaweedFS volume servers to increase the throughput.
+
+	The index file is still local, and the same O(1) disk read is applied to the remote file.
 
 `
 }
@@ -44,7 +60,8 @@ func (c *commandVolumeTier) Do(args []string, commandEnv *CommandEnv, writer io.
 	collection := tierCommand.String("collection", "", "the collection name")
 	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")
-	dest := tierCommand.String("destination", "", "the target tier name")
+	dest := tierCommand.String("dest", "", "the target tier name")
+	keepLocalDatFile := tierCommand.Bool("keepLocalDatFile", false, "whether keep local dat file")
 	if err = tierCommand.Parse(args); err != nil {
 		return nil
 	}
@@ -54,7 +71,7 @@ func (c *commandVolumeTier) Do(args []string, commandEnv *CommandEnv, writer io.
 
 	// volumeId is provided
 	if vid != 0 {
-		return doVolumeTier(ctx, commandEnv, *collection, vid, *dest)
+		return doVolumeTier(ctx, commandEnv, writer, *collection, vid, *dest, *keepLocalDatFile)
 	}
 
 	// apply to all volumes in the collection
@@ -65,7 +82,7 @@ func (c *commandVolumeTier) Do(args []string, commandEnv *CommandEnv, writer io.
 	}
 	fmt.Printf("tiering volumes: %v\n", volumeIds)
 	for _, vid := range volumeIds {
-		if err = doVolumeTier(ctx, commandEnv, *collection, vid, *dest); err != nil {
+		if err = doVolumeTier(ctx, commandEnv, writer, *collection, vid, *dest, *keepLocalDatFile); err != nil {
 			return err
 		}
 	}
@@ -73,7 +90,7 @@ func (c *commandVolumeTier) Do(args []string, commandEnv *CommandEnv, writer io.
 	return nil
 }
 
-func doVolumeTier(ctx context.Context, commandEnv *CommandEnv, collection string, vid needle.VolumeId, dest string) (err error) {
+func doVolumeTier(ctx context.Context, commandEnv *CommandEnv, writer io.Writer, collection string, vid needle.VolumeId, dest string, keepLocalDatFile bool) (err error) {
 	// find volume location
 	locations, found := commandEnv.MasterClient.GetLocations(uint32(vid))
 	if !found {
@@ -89,7 +106,7 @@ func doVolumeTier(ctx context.Context, commandEnv *CommandEnv, collection string
 	*/
 
 	// copy the .dat file to remote tier
-	err = copyDatToRemoteTier(ctx, commandEnv.option.GrpcDialOption, needle.VolumeId(vid), collection, locations[0].Url, dest)
+	err = copyDatToRemoteTier(ctx, commandEnv.option.GrpcDialOption, writer, needle.VolumeId(vid), collection, locations[0].Url, 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)
 	}
@@ -97,13 +114,34 @@ func doVolumeTier(ctx context.Context, commandEnv *CommandEnv, collection string
 	return nil
 }
 
-func copyDatToRemoteTier(ctx context.Context, grpcDialOption grpc.DialOption, volumeId needle.VolumeId, collection string, sourceVolumeServer string, dest string) error {
+func copyDatToRemoteTier(ctx context.Context, grpcDialOption grpc.DialOption, writer io.Writer, volumeId needle.VolumeId, collection string, sourceVolumeServer string, dest string, keepLocalDatFile bool) error {
 
 	err := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
-		_, copyErr := volumeServerClient.VolumeTierCopyDatToRemote(ctx, &volume_server_pb.VolumeTierCopyDatToRemoteRequest{
-			VolumeId:   uint32(volumeId),
-			Collection: collection,
+		stream, copyErr := volumeServerClient.VolumeTierCopyDatToRemote(ctx, &volume_server_pb.VolumeTierCopyDatToRemoteRequest{
+			VolumeId:               uint32(volumeId),
+			Collection:             collection,
+			DestinationBackendName: dest,
+			KeepLocalDatFile:       keepLocalDatFile,
 		})
+
+		var lastProcessed int64
+		for {
+			resp, recvErr := stream.Recv()
+			if recvErr != nil {
+				if recvErr == io.EOF {
+					break
+				} else {
+					return recvErr
+				}
+			}
+
+			processingSpeed := float64(resp.Processed - lastProcessed)/1024.0/1024.0
+
+			fmt.Fprintf(writer, "copied %.2f%%, %d bytes, %.2fMB/s\n", resp.ProcessedPercentage, resp.Processed, processingSpeed)
+
+			lastProcessed = resp.Processed
+		}
+
 		return copyErr
 	})
 
diff --git a/weed/storage/backend/backend.go b/weed/storage/backend/backend.go
index 2552e5c06..4b54d89dd 100644
--- a/weed/storage/backend/backend.go
+++ b/weed/storage/backend/backend.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/spf13/viper"
 )
 
@@ -23,7 +24,8 @@ type BackendStorageFile interface {
 
 type BackendStorage interface {
 	ToProperties() map[string]string
-	NewStorageFile(key string) BackendStorageFile
+	NewStorageFile(key string, tierInfo *volume_server_pb.VolumeTierInfo) BackendStorageFile
+	CopyFile(f *os.File, fn func(progressed int64, percentage float32) error) (key string, size int64, err error)
 }
 
 type StringProperties interface {
@@ -46,13 +48,13 @@ func LoadConfiguration(config *viper.Viper) {
 
 	backendSub := config.Sub(StorageBackendPrefix)
 
-	for backendTypeName, _ := range config.GetStringMap(StorageBackendPrefix) {
+	for backendTypeName := range config.GetStringMap(StorageBackendPrefix) {
 		backendStorageFactory, found := BackendStorageFactories[StorageType(backendTypeName)]
 		if !found {
 			glog.Fatalf("backend storage type %s not found", backendTypeName)
 		}
 		backendTypeSub := backendSub.Sub(backendTypeName)
-		for backendStorageId, _ := range backendSub.GetStringMap(backendTypeName) {
+		for backendStorageId := range backendSub.GetStringMap(backendTypeName) {
 			if !backendTypeSub.GetBool(backendStorageId + ".enabled") {
 				continue
 			}
@@ -105,12 +107,10 @@ func (p *Properties) GetString(key string) string {
 
 func ToPbStorageBackends() (backends []*master_pb.StorageBackend) {
 	for sName, s := range BackendStorages {
-		parts := strings.Split(sName, ".")
-		if len(parts) != 2 {
+		sType, sId := BackendNameToTypeId(sName)
+		if sType == "" {
 			continue
 		}
-
-		sType, sId := parts[0], parts[1]
 		backends = append(backends, &master_pb.StorageBackend{
 			Type:       sType,
 			Id:         sId,
@@ -119,3 +119,16 @@ func ToPbStorageBackends() (backends []*master_pb.StorageBackend) {
 	}
 	return
 }
+
+func BackendNameToTypeId(backendName string) (backendType, backendId string) {
+	parts := strings.Split(backendName, ".")
+	if len(parts) == 1 {
+		return backendName, "default"
+	}
+	if len(parts) != 2 {
+		return
+	}
+
+	backendType, backendId = parts[0], parts[1]
+	return
+}
diff --git a/weed/storage/backend/s3_backend/s3_backend.go b/weed/storage/backend/s3_backend/s3_backend.go
index 7db8f2337..66299be48 100644
--- a/weed/storage/backend/s3_backend/s3_backend.go
+++ b/weed/storage/backend/s3_backend/s3_backend.go
@@ -2,6 +2,7 @@ package s3_backend
 
 import (
 	"fmt"
+	"io"
 	"os"
 	"strings"
 	"time"
@@ -9,7 +10,9 @@ import (
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/aws/aws-sdk-go/service/s3/s3iface"
 	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage/backend"
+	"github.com/google/uuid"
 )
 
 func init() {
@@ -57,7 +60,7 @@ func (s *S3BackendStorage) ToProperties() map[string]string {
 	return m
 }
 
-func (s *S3BackendStorage) NewStorageFile(key string) backend.BackendStorageFile {
+func (s *S3BackendStorage) NewStorageFile(key string, tierInfo *volume_server_pb.VolumeTierInfo) backend.BackendStorageFile {
 	if strings.HasPrefix(key, "/") {
 		key = key[1:]
 	}
@@ -65,18 +68,35 @@ func (s *S3BackendStorage) NewStorageFile(key string) backend.BackendStorageFile
 	f := &S3BackendStorageFile{
 		backendStorage: s,
 		key:            key,
+		tierInfo:       tierInfo,
 	}
 
 	return f
 }
 
+func (s *S3BackendStorage) CopyFile(f *os.File, fn func(progressed int64, percentage float32) error) (key string, size int64, err error) {
+	randomUuid, _ := uuid.NewRandom()
+	key = randomUuid.String()
+
+	glog.V(1).Infof("copying dat file of", f.Name(), "to remote s3", s.id, "as", key)
+
+	size, err = uploadToS3(s.conn, f.Name(), s.bucket, key, fn)
+
+	return
+}
+
 type S3BackendStorageFile struct {
 	backendStorage *S3BackendStorage
 	key            string
+	tierInfo       *volume_server_pb.VolumeTierInfo
 }
 
 func (s3backendStorageFile S3BackendStorageFile) ReadAt(p []byte, off int64) (n int, err error) {
+
 	bytesRange := fmt.Sprintf("bytes=%d-%d", off, off+int64(len(p))-1)
+
+	// glog.V(0).Infof("read %s %s", s3backendStorageFile.key, bytesRange)
+
 	getObjectOutput, getObjectErr := s3backendStorageFile.backendStorage.conn.GetObject(&s3.GetObjectInput{
 		Bucket: &s3backendStorageFile.backendStorage.bucket,
 		Key:    &s3backendStorageFile.key,
@@ -84,13 +104,26 @@ func (s3backendStorageFile S3BackendStorageFile) ReadAt(p []byte, off int64) (n
 	})
 
 	if getObjectErr != nil {
-		return 0, fmt.Errorf("bucket %s GetObject %s: %v",
-			s3backendStorageFile.backendStorage.bucket, s3backendStorageFile.key, getObjectErr)
+		return 0, fmt.Errorf("bucket %s GetObject %s: %v", s3backendStorageFile.backendStorage.bucket, s3backendStorageFile.key, getObjectErr)
 	}
 	defer getObjectOutput.Body.Close()
 
-	return getObjectOutput.Body.Read(p)
+	glog.V(4).Infof("read %s %s", s3backendStorageFile.key, bytesRange)
+	glog.V(4).Infof("content range: %s, contentLength: %d", *getObjectOutput.ContentRange, *getObjectOutput.ContentLength)
 
+	for {
+		if n, err = getObjectOutput.Body.Read(p); err == nil && n < len(p) {
+			p = p[n:]
+		} else {
+			break
+		}
+	}
+
+	if err == io.EOF {
+		err = nil
+	}
+
+	return
 }
 
 func (s3backendStorageFile S3BackendStorageFile) WriteAt(p []byte, off int64) (n int, err error) {
@@ -107,18 +140,15 @@ func (s3backendStorageFile S3BackendStorageFile) Close() error {
 
 func (s3backendStorageFile S3BackendStorageFile) GetStat() (datSize int64, modTime time.Time, err error) {
 
-	headObjectOutput, headObjectErr := s3backendStorageFile.backendStorage.conn.HeadObject(&s3.HeadObjectInput{
-		Bucket: &s3backendStorageFile.backendStorage.bucket,
-		Key:    &s3backendStorageFile.key,
-	})
+	files := s3backendStorageFile.tierInfo.GetFiles()
 
-	if headObjectErr != nil {
-		return 0, time.Now(), fmt.Errorf("bucket %s HeadObject %s: %v",
-			s3backendStorageFile.backendStorage.bucket, s3backendStorageFile.key, headObjectErr)
+	if len(files)==0 {
+		err = fmt.Errorf("remote file info not found")
+		return
 	}
 
-	datSize = int64(*headObjectOutput.ContentLength)
-	modTime = *headObjectOutput.LastModified
+	datSize = int64(files[0].FileSize)
+	modTime = time.Unix(int64(files[0].ModifiedTime),0)
 
 	return
 }
diff --git a/weed/storage/backend/s3_backend/s3_upload.go b/weed/storage/backend/s3_backend/s3_upload.go
index 1fde0a84f..38acd18ef 100644
--- a/weed/storage/backend/s3_backend/s3_upload.go
+++ b/weed/storage/backend/s3_backend/s3_upload.go
@@ -3,27 +3,30 @@ package s3_backend
 import (
 	"fmt"
 	"os"
+	"sync/atomic"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3/s3iface"
 	"github.com/aws/aws-sdk-go/service/s3/s3manager"
+	"github.com/chrislusf/seaweedfs/weed/glog"
 )
 
-func uploadToS3(sess s3iface.S3API, filename string, destBucket string, destKey string) error {
+func uploadToS3(sess s3iface.S3API, filename string, destBucket string, destKey string,
+	fn func(progressed int64, percentage float32)error) (fileSize int64, err error) {
 
 	//open the file
 	f, err := os.Open(filename)
 	if err != nil {
-		return fmt.Errorf("failed to open file %q, %v", filename, err)
+		return 0, fmt.Errorf("failed to open file %q, %v", filename, err)
 	}
 	defer f.Close()
 
 	info, err := f.Stat()
 	if err != nil {
-		return fmt.Errorf("failed to stat file %q, %v", filename, err)
+		return 0, fmt.Errorf("failed to stat file %q, %v", filename, err)
 	}
 
-	fileSize := info.Size()
+	fileSize = info.Size()
 
 	partSize := int64(64 * 1024 * 1024) // The minimum/default allowed part size is 5MB
 	for partSize*1000 < fileSize {
@@ -33,14 +36,22 @@ func uploadToS3(sess s3iface.S3API, filename string, destBucket string, destKey
 	// Create an uploader with the session and custom options
 	uploader := s3manager.NewUploaderWithClient(sess, func(u *s3manager.Uploader) {
 		u.PartSize = partSize
-		u.Concurrency = 15 // default is 15
+		u.Concurrency = 5
 	})
 
+	fileReader := &s3UploadProgressedReader{
+		fp: f,
+		size:fileSize,
+		read:-fileSize,
+		fn:fn,
+	}
+
 	// Upload the file to S3.
-	result, err := uploader.Upload(&s3manager.UploadInput{
+	var result *s3manager.UploadOutput
+	result, err = uploader.Upload(&s3manager.UploadInput{
 		Bucket:               aws.String(destBucket),
 		Key:                  aws.String(destKey),
-		Body:                 f,
+		Body:                 fileReader,
 		ACL:                  aws.String("private"),
 		ServerSideEncryption: aws.String("AES256"),
 		StorageClass:         aws.String("STANDARD_IA"),
@@ -48,9 +59,44 @@ func uploadToS3(sess s3iface.S3API, filename string, destBucket string, destKey
 
 	//in case it fails to upload
 	if err != nil {
-		return fmt.Errorf("failed to upload file, %v", err)
+		return 0, fmt.Errorf("failed to upload file %s: %v", filename, err)
 	}
-	fmt.Printf("file %s uploaded to %s\n", filename, result.Location)
+	glog.V(1).Infof("file %s uploaded to %s\n", filename, result.Location)
 
-	return nil
+	return
+}
+
+// adapted from https://github.com/aws/aws-sdk-go/pull/1868
+type s3UploadProgressedReader struct {
+	fp   *os.File
+	size int64
+	read int64
+	fn func(progressed int64, percentage float32)error
+}
+func (r *s3UploadProgressedReader) Read(p []byte) (int, error) {
+	return r.fp.Read(p)
+}
+
+func (r *s3UploadProgressedReader) ReadAt(p []byte, off int64) (int, error) {
+	n, err := r.fp.ReadAt(p, off)
+	if err != nil {
+		return n, err
+	}
+
+	// Got the length have read( or means has uploaded), and you can construct your message
+	atomic.AddInt64(&r.read, int64(n))
+
+	if r.fn != nil {
+		read := r.read
+		if err := r.fn(read, float32(read*100)/float32(r.size)); err != nil {
+			return n, err
+		}
+	}
+
+	return n, err
+}
+
+
+func (r *s3UploadProgressedReader) Seek(offset int64, whence int) (int64, error) {
+	return r.fp.Seek(offset, whence)
 }
diff --git a/weed/storage/disk_location.go b/weed/storage/disk_location.go
index c7faa57a6..66d3b86c2 100644
--- a/weed/storage/disk_location.go
+++ b/weed/storage/disk_location.go
@@ -33,8 +33,8 @@ func NewDiskLocation(dir string, maxVolumeCount int) *DiskLocation {
 
 func (l *DiskLocation) volumeIdFromPath(dir os.FileInfo) (needle.VolumeId, string, error) {
 	name := dir.Name()
-	if !dir.IsDir() && strings.HasSuffix(name, ".dat") {
-		base := name[:len(name)-len(".dat")]
+	if !dir.IsDir() && strings.HasSuffix(name, ".idx") {
+		base := name[:len(name)-len(".idx")]
 		collection, volumeId, err := parseCollectionVolumeId(base)
 		return volumeId, collection, err
 	}
@@ -53,7 +53,7 @@ func parseCollectionVolumeId(base string) (collection string, vid needle.VolumeI
 
 func (l *DiskLocation) loadExistingVolume(fileInfo os.FileInfo, needleMapKind NeedleMapType) {
 	name := fileInfo.Name()
-	if !fileInfo.IsDir() && strings.HasSuffix(name, ".dat") {
+	if !fileInfo.IsDir() && strings.HasSuffix(name, ".idx") {
 		vid, collection, err := l.volumeIdFromPath(fileInfo)
 		if err == nil {
 			l.RLock()
diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index 00d76a4b3..ee05126e1 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/storage/backend"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
@@ -37,6 +38,8 @@ type Volume struct {
 	lastCompactRevision    uint16
 
 	isCompacting bool
+
+	volumeTierInfo *volume_server_pb.VolumeTierInfo
 }
 
 func NewVolume(dirname string, collection string, id needle.VolumeId, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapMaxSizeMb uint32) (v *Volume, e error) {
diff --git a/weed/storage/volume_loading.go b/weed/storage/volume_loading.go
index 6f1d8fe40..e09f848ab 100644
--- a/weed/storage/volume_loading.go
+++ b/weed/storage/volume_loading.go
@@ -26,8 +26,11 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 	fileName := v.FileName()
 	alreadyHasSuperBlock := false
 
-	// open dat file
-	if exists, canRead, canWrite, modifiedTime, fileSize := checkFile(fileName + ".dat"); exists {
+	if v.maybeLoadVolumeTierInfo() {
+		// open remote file
+		alreadyHasSuperBlock = true
+	} else if exists, canRead, canWrite, modifiedTime, fileSize := checkFile(fileName + ".dat"); exists {
+		// open dat file
 		if !canRead {
 			return fmt.Errorf("cannot read Volume Data file %s.dat", fileName)
 		}
diff --git a/weed/storage/volume_tier.go b/weed/storage/volume_tier.go
new file mode 100644
index 000000000..d469d7483
--- /dev/null
+++ b/weed/storage/volume_tier.go
@@ -0,0 +1,104 @@
+package storage
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+
+	_ "github.com/chrislusf/seaweedfs/weed/storage/backend/s3_backend"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/storage/backend"
+	"github.com/golang/protobuf/jsonpb"
+)
+
+func (v *Volume) GetVolumeTierInfo() *volume_server_pb.VolumeTierInfo {
+	return v.volumeTierInfo
+}
+
+func (v *Volume) maybeLoadVolumeTierInfo() bool {
+
+	v.volumeTierInfo = &volume_server_pb.VolumeTierInfo{}
+
+	tierFileName := v.FileName() + ".tier"
+
+	if exists, canRead, _, _, _ := checkFile(tierFileName); !exists || !canRead {
+		if !exists {
+			return false
+		}
+		if !canRead {
+			glog.Warningf("can not read %s", tierFileName)
+		}
+		return false
+	}
+
+	glog.V(0).Infof("maybeLoadVolumeTierInfo loading volume %d check file", v.Id)
+
+	tierData, readErr := ioutil.ReadFile(tierFileName)
+	if readErr != nil {
+		glog.Warningf("fail to read %s : %v", tierFileName, readErr)
+		return false
+	}
+
+	glog.V(0).Infof("maybeLoadVolumeTierInfo loading volume %d ReadFile", v.Id)
+
+	if err := jsonpb.Unmarshal(bytes.NewReader(tierData), v.volumeTierInfo); err != nil {
+		glog.Warningf("unmarshal error: %v", err)
+		return false
+	}
+
+	glog.V(0).Infof("maybeLoadVolumeTierInfo loading volume %d Unmarshal tierInfo %v", v.Id, v.volumeTierInfo)
+
+	if len(v.volumeTierInfo.GetFiles()) == 0 {
+		return false
+	}
+
+	glog.V(0).Infof("volume %d is tiered to %s as %s and read only", v.Id,
+		v.volumeTierInfo.Files[0].BackendName(), v.volumeTierInfo.Files[0].Key)
+
+	v.readOnly = true
+
+	glog.V(0).Infof("loading volume %d from remote %v", v.Id, v.volumeTierInfo.Files)
+	v.LoadRemoteFile()
+
+	return true
+}
+
+func (v *Volume) LoadRemoteFile() error {
+	tierFile := v.volumeTierInfo.GetFiles()[0]
+	backendStorage := backend.BackendStorages[tierFile.BackendName()]
+
+	if v.DataBackend != nil {
+		v.DataBackend.Close()
+	}
+
+	v.DataBackend = backendStorage.NewStorageFile(tierFile.Key, v.volumeTierInfo)
+	return nil
+}
+
+func (v *Volume) SaveVolumeTierInfo() error {
+
+	tierFileName := v.FileName() + ".tier"
+
+	if exists, _, canWrite, _, _ := checkFile(tierFileName); exists && !canWrite {
+		return fmt.Errorf("%s not writable", tierFileName)
+	}
+
+	m := jsonpb.Marshaler{
+		EmitDefaults: true,
+		Indent:       "  ",
+	}
+
+	text, marshalErr := m.MarshalToString(v.GetVolumeTierInfo())
+	if marshalErr != nil {
+		return fmt.Errorf("marshal volume %d tier info: %v", v.Id, marshalErr)
+	}
+
+	writeErr := ioutil.WriteFile(tierFileName, []byte(text), 0755)
+	if writeErr != nil {
+		return fmt.Errorf("fail to write %s : %v", tierFileName, writeErr)
+	}
+
+	return nil
+}