diff --git a/weed/Makefile b/weed/Makefile
index d7e743e9c..f537fe051 100644
--- a/weed/Makefile
+++ b/weed/Makefile
@@ -24,4 +24,4 @@ debug_server:
 
 debug_volume:
 	go build -gcflags="all=-N -l"
-	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- volume -dir=/Volumes/mobile_disk/100 -port 8564 -max=30
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- volume -dir=/Volumes/mobile_disk/100 -port 8564 -max=30 -preStopSeconds=2
diff --git a/weed/command/volume.go b/weed/command/volume.go
index 5ac31ba79..92f83f945 100644
--- a/weed/command/volume.go
+++ b/weed/command/volume.go
@@ -223,22 +223,27 @@ func (v VolumeServerOptions) startVolumeServer(volumeFolders, maxVolumeCounts, v
 	// starting the cluster http server
 	clusterHttpServer := v.startClusterHttpService(volumeMux)
 
+	stopChan := make(chan bool)
 	grace.OnInterrupt(func() {
 		fmt.Println("volume server has be killed")
 
-		// Stop heartbeatsZ
-		glog.V(0).Infof("stop send heartbeat and wait %d seconds until shutdown ...", *v.preStopSeconds)
-		volumeServer.SendHeartbeat = false
-		time.Sleep(time.Duration(*v.preStopSeconds) * time.Second)
+		// Stop heartbeats
+		if !volumeServer.StopHeartbeat() {
+			glog.V(0).Infof("stop send heartbeat and wait %d seconds until shutdown ...", *v.preStopSeconds)
+			time.Sleep(time.Duration(*v.preStopSeconds) * time.Second)
+		}
 
-		v.shutdown(publicHttpDown, clusterHttpServer, grpcS, volumeServer)
+		shutdown(publicHttpDown, clusterHttpServer, grpcS, volumeServer)
+		stopChan <- true
 	})
 
-	select {}
+	select {
+	case <-stopChan:
+	}
 
 }
 
-func (v VolumeServerOptions) shutdown(publicHttpDown httpdown.Server, clusterHttpServer httpdown.Server, grpcS *grpc.Server, volumeServer *weed_server.VolumeServer) {
+func shutdown(publicHttpDown httpdown.Server, clusterHttpServer httpdown.Server, grpcS *grpc.Server, volumeServer *weed_server.VolumeServer) {
 
 	// firstly, stop the public http service to prevent from receiving new user request
 	if nil != publicHttpDown {
diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index 2121cc3cc..73ec16239 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -85,6 +85,8 @@ service VolumeServer {
 
     rpc VolumeServerStatus (VolumeServerStatusRequest) returns (VolumeServerStatusResponse) {
     }
+    rpc VolumeServerLeave (VolumeServerLeaveRequest) returns (VolumeServerLeaveResponse) {
+    }
 
     // <experimental> query
     rpc Query (QueryRequest) returns (stream QueriedStripe) {
@@ -425,6 +427,11 @@ message VolumeServerStatusResponse {
     MemStatus memory_status = 2;
 }
 
+message VolumeServerLeaveRequest {
+}
+message VolumeServerLeaveResponse {
+}
+
 // select on volume servers
 message QueryRequest {
     repeated string selections = 1;
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index 4609d6dd8..d95912b68 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -3979,6 +3979,82 @@ func (x *VolumeServerStatusResponse) GetMemoryStatus() *MemStatus {
 	return nil
 }
 
+type VolumeServerLeaveRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *VolumeServerLeaveRequest) Reset() {
+	*x = VolumeServerLeaveRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[72]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VolumeServerLeaveRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VolumeServerLeaveRequest) ProtoMessage() {}
+
+func (x *VolumeServerLeaveRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[72]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VolumeServerLeaveRequest.ProtoReflect.Descriptor instead.
+func (*VolumeServerLeaveRequest) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{72}
+}
+
+type VolumeServerLeaveResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *VolumeServerLeaveResponse) Reset() {
+	*x = VolumeServerLeaveResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[73]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VolumeServerLeaveResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VolumeServerLeaveResponse) ProtoMessage() {}
+
+func (x *VolumeServerLeaveResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[73]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VolumeServerLeaveResponse.ProtoReflect.Descriptor instead.
+func (*VolumeServerLeaveResponse) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{73}
+}
+
 // select on volume servers
 type QueryRequest struct {
 	state         protoimpl.MessageState
@@ -3995,7 +4071,7 @@ type QueryRequest struct {
 func (x *QueryRequest) Reset() {
 	*x = QueryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[72]
+		mi := &file_volume_server_proto_msgTypes[74]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4008,7 +4084,7 @@ func (x *QueryRequest) String() string {
 func (*QueryRequest) ProtoMessage() {}
 
 func (x *QueryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[72]
+	mi := &file_volume_server_proto_msgTypes[74]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4021,7 +4097,7 @@ func (x *QueryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest.ProtoReflect.Descriptor instead.
 func (*QueryRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72}
+	return file_volume_server_proto_rawDescGZIP(), []int{74}
 }
 
 func (x *QueryRequest) GetSelections() []string {
@@ -4070,7 +4146,7 @@ type QueriedStripe struct {
 func (x *QueriedStripe) Reset() {
 	*x = QueriedStripe{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[73]
+		mi := &file_volume_server_proto_msgTypes[75]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4083,7 +4159,7 @@ func (x *QueriedStripe) String() string {
 func (*QueriedStripe) ProtoMessage() {}
 
 func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[73]
+	mi := &file_volume_server_proto_msgTypes[75]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4096,7 +4172,7 @@ func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueriedStripe.ProtoReflect.Descriptor instead.
 func (*QueriedStripe) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{73}
+	return file_volume_server_proto_rawDescGZIP(), []int{75}
 }
 
 func (x *QueriedStripe) GetRecords() []byte {
@@ -4118,7 +4194,7 @@ type VolumeNeedleStatusRequest struct {
 func (x *VolumeNeedleStatusRequest) Reset() {
 	*x = VolumeNeedleStatusRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[74]
+		mi := &file_volume_server_proto_msgTypes[76]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4131,7 +4207,7 @@ func (x *VolumeNeedleStatusRequest) String() string {
 func (*VolumeNeedleStatusRequest) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[74]
+	mi := &file_volume_server_proto_msgTypes[76]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4144,7 +4220,7 @@ func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusRequest.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{74}
+	return file_volume_server_proto_rawDescGZIP(), []int{76}
 }
 
 func (x *VolumeNeedleStatusRequest) GetVolumeId() uint32 {
@@ -4177,7 +4253,7 @@ type VolumeNeedleStatusResponse struct {
 func (x *VolumeNeedleStatusResponse) Reset() {
 	*x = VolumeNeedleStatusResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[75]
+		mi := &file_volume_server_proto_msgTypes[77]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4190,7 +4266,7 @@ func (x *VolumeNeedleStatusResponse) String() string {
 func (*VolumeNeedleStatusResponse) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[75]
+	mi := &file_volume_server_proto_msgTypes[77]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4203,7 +4279,7 @@ func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusResponse.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{75}
+	return file_volume_server_proto_rawDescGZIP(), []int{77}
 }
 
 func (x *VolumeNeedleStatusResponse) GetNeedleId() uint64 {
@@ -4261,7 +4337,7 @@ type QueryRequest_Filter struct {
 func (x *QueryRequest_Filter) Reset() {
 	*x = QueryRequest_Filter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[76]
+		mi := &file_volume_server_proto_msgTypes[78]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4274,7 +4350,7 @@ func (x *QueryRequest_Filter) String() string {
 func (*QueryRequest_Filter) ProtoMessage() {}
 
 func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[76]
+	mi := &file_volume_server_proto_msgTypes[78]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4287,7 +4363,7 @@ func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_Filter.ProtoReflect.Descriptor instead.
 func (*QueryRequest_Filter) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 0}
 }
 
 func (x *QueryRequest_Filter) GetField() string {
@@ -4326,7 +4402,7 @@ type QueryRequest_InputSerialization struct {
 func (x *QueryRequest_InputSerialization) Reset() {
 	*x = QueryRequest_InputSerialization{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[77]
+		mi := &file_volume_server_proto_msgTypes[79]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4339,7 +4415,7 @@ func (x *QueryRequest_InputSerialization) String() string {
 func (*QueryRequest_InputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[77]
+	mi := &file_volume_server_proto_msgTypes[79]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4352,7 +4428,7 @@ func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_InputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 1}
 }
 
 func (x *QueryRequest_InputSerialization) GetCompressionType() string {
@@ -4395,7 +4471,7 @@ type QueryRequest_OutputSerialization struct {
 func (x *QueryRequest_OutputSerialization) Reset() {
 	*x = QueryRequest_OutputSerialization{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[78]
+		mi := &file_volume_server_proto_msgTypes[80]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4408,7 +4484,7 @@ func (x *QueryRequest_OutputSerialization) String() string {
 func (*QueryRequest_OutputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[78]
+	mi := &file_volume_server_proto_msgTypes[80]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4421,7 +4497,7 @@ func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_OutputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 2}
 }
 
 func (x *QueryRequest_OutputSerialization) GetCsvOutput() *QueryRequest_OutputSerialization_CSVOutput {
@@ -4456,7 +4532,7 @@ type QueryRequest_InputSerialization_CSVInput struct {
 func (x *QueryRequest_InputSerialization_CSVInput) Reset() {
 	*x = QueryRequest_InputSerialization_CSVInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[79]
+		mi := &file_volume_server_proto_msgTypes[81]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4469,7 +4545,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) String() string {
 func (*QueryRequest_InputSerialization_CSVInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[79]
+	mi := &file_volume_server_proto_msgTypes[81]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4482,7 +4558,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.M
 
 // Deprecated: Use QueryRequest_InputSerialization_CSVInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_CSVInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 1, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 1, 0}
 }
 
 func (x *QueryRequest_InputSerialization_CSVInput) GetFileHeaderInfo() string {
@@ -4545,7 +4621,7 @@ type QueryRequest_InputSerialization_JSONInput struct {
 func (x *QueryRequest_InputSerialization_JSONInput) Reset() {
 	*x = QueryRequest_InputSerialization_JSONInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[80]
+		mi := &file_volume_server_proto_msgTypes[82]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4558,7 +4634,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) String() string {
 func (*QueryRequest_InputSerialization_JSONInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[80]
+	mi := &file_volume_server_proto_msgTypes[82]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4571,7 +4647,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.
 
 // Deprecated: Use QueryRequest_InputSerialization_JSONInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_JSONInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 1, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 1, 1}
 }
 
 func (x *QueryRequest_InputSerialization_JSONInput) GetType() string {
@@ -4590,7 +4666,7 @@ type QueryRequest_InputSerialization_ParquetInput struct {
 func (x *QueryRequest_InputSerialization_ParquetInput) Reset() {
 	*x = QueryRequest_InputSerialization_ParquetInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[81]
+		mi := &file_volume_server_proto_msgTypes[83]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4603,7 +4679,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) String() string {
 func (*QueryRequest_InputSerialization_ParquetInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[81]
+	mi := &file_volume_server_proto_msgTypes[83]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4616,7 +4692,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protorefle
 
 // Deprecated: Use QueryRequest_InputSerialization_ParquetInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_ParquetInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 1, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 1, 2}
 }
 
 type QueryRequest_OutputSerialization_CSVOutput struct {
@@ -4634,7 +4710,7 @@ type QueryRequest_OutputSerialization_CSVOutput struct {
 func (x *QueryRequest_OutputSerialization_CSVOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_CSVOutput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[82]
+		mi := &file_volume_server_proto_msgTypes[84]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4647,7 +4723,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) String() string {
 func (*QueryRequest_OutputSerialization_CSVOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[82]
+	mi := &file_volume_server_proto_msgTypes[84]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4660,7 +4736,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect
 
 // Deprecated: Use QueryRequest_OutputSerialization_CSVOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_CSVOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 2, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 2, 0}
 }
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) GetQuoteFields() string {
@@ -4709,7 +4785,7 @@ type QueryRequest_OutputSerialization_JSONOutput struct {
 func (x *QueryRequest_OutputSerialization_JSONOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_JSONOutput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[83]
+		mi := &file_volume_server_proto_msgTypes[85]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4722,7 +4798,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) String() string {
 func (*QueryRequest_OutputSerialization_JSONOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[83]
+	mi := &file_volume_server_proto_msgTypes[85]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4735,7 +4811,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflec
 
 // Deprecated: Use QueryRequest_OutputSerialization_JSONOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_JSONOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{72, 2, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{74, 2, 1}
 }
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) GetRecordDelimiter() string {
@@ -5171,381 +5247,391 @@ var file_volume_server_proto_rawDesc = []byte{
 	0x5f, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1b, 0x2e,
 	0x76, 0x6f, 0x6c, 0x75, 0x6d, 0x65, 0x5f, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x70, 0x62,
 	0x2e, 0x4d, 0x65, 0x6d, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x52, 0x0c, 0x6d, 0x65, 0x6d, 0x6f,
-	0x72, 0x79, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x22, 0xf8, 0x0c, 0x0a, 0x0c, 0x51, 0x75, 0x65,
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 }
 
 var (
@@ -5560,7 +5646,7 @@ func file_volume_server_proto_rawDescGZIP() []byte {
 	return file_volume_server_proto_rawDescData
 }
 
-var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 84)
+var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 86)
 var file_volume_server_proto_goTypes = []interface{}{
 	(*BatchDeleteRequest)(nil),                           // 0: volume_server_pb.BatchDeleteRequest
 	(*BatchDeleteResponse)(nil),                          // 1: volume_server_pb.BatchDeleteResponse
@@ -5634,32 +5720,34 @@ var file_volume_server_proto_goTypes = []interface{}{
 	(*VolumeTierMoveDatFromRemoteResponse)(nil),          // 69: volume_server_pb.VolumeTierMoveDatFromRemoteResponse
 	(*VolumeServerStatusRequest)(nil),                    // 70: volume_server_pb.VolumeServerStatusRequest
 	(*VolumeServerStatusResponse)(nil),                   // 71: volume_server_pb.VolumeServerStatusResponse
-	(*QueryRequest)(nil),                                 // 72: volume_server_pb.QueryRequest
-	(*QueriedStripe)(nil),                                // 73: volume_server_pb.QueriedStripe
-	(*VolumeNeedleStatusRequest)(nil),                    // 74: volume_server_pb.VolumeNeedleStatusRequest
-	(*VolumeNeedleStatusResponse)(nil),                   // 75: volume_server_pb.VolumeNeedleStatusResponse
-	(*QueryRequest_Filter)(nil),                          // 76: volume_server_pb.QueryRequest.Filter
-	(*QueryRequest_InputSerialization)(nil),              // 77: volume_server_pb.QueryRequest.InputSerialization
-	(*QueryRequest_OutputSerialization)(nil),             // 78: volume_server_pb.QueryRequest.OutputSerialization
-	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 79: volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 80: volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 81: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 82: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 83: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	(*VolumeServerLeaveRequest)(nil),                      // 72: volume_server_pb.VolumeServerLeaveRequest
+	(*VolumeServerLeaveResponse)(nil),                     // 73: volume_server_pb.VolumeServerLeaveResponse
+	(*QueryRequest)(nil),                                 // 74: volume_server_pb.QueryRequest
+	(*QueriedStripe)(nil),                                // 75: volume_server_pb.QueriedStripe
+	(*VolumeNeedleStatusRequest)(nil),                    // 76: volume_server_pb.VolumeNeedleStatusRequest
+	(*VolumeNeedleStatusResponse)(nil),                   // 77: volume_server_pb.VolumeNeedleStatusResponse
+	(*QueryRequest_Filter)(nil),                          // 78: volume_server_pb.QueryRequest.Filter
+	(*QueryRequest_InputSerialization)(nil),              // 79: volume_server_pb.QueryRequest.InputSerialization
+	(*QueryRequest_OutputSerialization)(nil),             // 80: volume_server_pb.QueryRequest.OutputSerialization
+	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 81: volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 82: volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 83: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 84: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 85: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
 }
 var file_volume_server_proto_depIdxs = []int32{
 	2,  // 0: volume_server_pb.BatchDeleteResponse.results:type_name -> volume_server_pb.DeleteResult
 	64, // 1: volume_server_pb.VolumeInfo.files:type_name -> volume_server_pb.RemoteFile
 	62, // 2: volume_server_pb.VolumeServerStatusResponse.disk_statuses:type_name -> volume_server_pb.DiskStatus
 	63, // 3: volume_server_pb.VolumeServerStatusResponse.memory_status:type_name -> volume_server_pb.MemStatus
-	76, // 4: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
-	77, // 5: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
-	78, // 6: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
-	79, // 7: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	80, // 8: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	81, // 9: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	82, // 10: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	83, // 11: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	78, // 4: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
+	79, // 5: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
+	80, // 6: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
+	81, // 7: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	82, // 8: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	83, // 9: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	84, // 10: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	85, // 11: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
 	0,  // 12: volume_server_pb.VolumeServer.BatchDelete:input_type -> volume_server_pb.BatchDeleteRequest
 	4,  // 13: volume_server_pb.VolumeServer.VacuumVolumeCheck:input_type -> volume_server_pb.VacuumVolumeCheckRequest
 	6,  // 14: volume_server_pb.VolumeServer.VacuumVolumeCompact:input_type -> volume_server_pb.VacuumVolumeCompactRequest
@@ -5693,45 +5781,47 @@ var file_volume_server_proto_depIdxs = []int32{
 	66, // 42: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:input_type -> volume_server_pb.VolumeTierMoveDatToRemoteRequest
 	68, // 43: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:input_type -> volume_server_pb.VolumeTierMoveDatFromRemoteRequest
 	70, // 44: volume_server_pb.VolumeServer.VolumeServerStatus:input_type -> volume_server_pb.VolumeServerStatusRequest
-	72, // 45: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
-	74, // 46: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
-	1,  // 47: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
-	5,  // 48: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
-	7,  // 49: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
-	9,  // 50: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
-	11, // 51: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
-	13, // 52: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
-	15, // 53: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
-	17, // 54: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
-	19, // 55: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
-	21, // 56: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
-	23, // 57: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
-	25, // 58: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
-	27, // 59: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
-	29, // 60: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
-	31, // 61: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
-	33, // 62: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
-	35, // 63: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
-	61, // 64: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
-	37, // 65: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
-	39, // 66: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
-	41, // 67: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
-	43, // 68: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
-	45, // 69: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
-	47, // 70: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
-	49, // 71: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
-	51, // 72: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
-	53, // 73: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
-	55, // 74: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
-	57, // 75: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
-	59, // 76: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
-	67, // 77: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
-	69, // 78: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
-	71, // 79: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
-	73, // 80: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
-	75, // 81: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
-	47, // [47:82] is the sub-list for method output_type
-	12, // [12:47] is the sub-list for method input_type
+	72, // 45: volume_server_pb.VolumeServer.VolumeServerLeave:input_type -> volume_server_pb.VolumeServerLeaveRequest
+	74, // 46: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
+	76, // 47: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
+	1,  // 48: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
+	5,  // 49: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
+	7,  // 50: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
+	9,  // 51: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
+	11, // 52: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
+	13, // 53: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
+	15, // 54: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
+	17, // 55: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
+	19, // 56: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
+	21, // 57: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
+	23, // 58: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
+	25, // 59: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
+	27, // 60: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
+	29, // 61: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
+	31, // 62: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
+	33, // 63: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
+	35, // 64: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
+	61, // 65: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
+	37, // 66: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
+	39, // 67: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
+	41, // 68: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
+	43, // 69: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
+	45, // 70: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
+	47, // 71: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
+	49, // 72: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
+	51, // 73: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
+	53, // 74: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
+	55, // 75: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
+	57, // 76: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
+	59, // 77: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
+	67, // 78: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
+	69, // 79: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
+	71, // 80: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
+	73, // 81: volume_server_pb.VolumeServer.VolumeServerLeave:output_type -> volume_server_pb.VolumeServerLeaveResponse
+	75, // 82: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
+	77, // 83: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
+	48, // [48:84] is the sub-list for method output_type
+	12, // [12:48] is the sub-list for method input_type
 	12, // [12:12] is the sub-list for extension type_name
 	12, // [12:12] is the sub-list for extension extendee
 	0,  // [0:12] is the sub-list for field type_name
@@ -6608,7 +6698,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[72].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest); i {
+			switch v := v.(*VolumeServerLeaveRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6620,7 +6710,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[73].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueriedStripe); i {
+			switch v := v.(*VolumeServerLeaveResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6632,7 +6722,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[74].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeNeedleStatusRequest); i {
+			switch v := v.(*QueryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6644,7 +6734,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[75].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeNeedleStatusResponse); i {
+			switch v := v.(*QueriedStripe); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6656,7 +6746,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[76].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_Filter); i {
+			switch v := v.(*VolumeNeedleStatusRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6668,7 +6758,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[77].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization); i {
+			switch v := v.(*VolumeNeedleStatusResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6680,7 +6770,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[78].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_OutputSerialization); i {
+			switch v := v.(*QueryRequest_Filter); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6692,7 +6782,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[79].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_CSVInput); i {
+			switch v := v.(*QueryRequest_InputSerialization); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6704,7 +6794,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[80].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_JSONInput); i {
+			switch v := v.(*QueryRequest_OutputSerialization); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6716,7 +6806,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[81].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_ParquetInput); i {
+			switch v := v.(*QueryRequest_InputSerialization_CSVInput); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6728,7 +6818,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[82].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_OutputSerialization_CSVOutput); i {
+			switch v := v.(*QueryRequest_InputSerialization_JSONInput); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6740,6 +6830,30 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[83].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_InputSerialization_ParquetInput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[84].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_OutputSerialization_CSVOutput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[85].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryRequest_OutputSerialization_JSONOutput); i {
 			case 0:
 				return &v.state
@@ -6758,7 +6872,7 @@ func file_volume_server_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_volume_server_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   84,
+			NumMessages:   86,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
@@ -6821,6 +6935,7 @@ type VolumeServerClient interface {
 	VolumeTierMoveDatToRemote(ctx context.Context, in *VolumeTierMoveDatToRemoteRequest, opts ...grpc.CallOption) (VolumeServer_VolumeTierMoveDatToRemoteClient, error)
 	VolumeTierMoveDatFromRemote(ctx context.Context, in *VolumeTierMoveDatFromRemoteRequest, opts ...grpc.CallOption) (VolumeServer_VolumeTierMoveDatFromRemoteClient, error)
 	VolumeServerStatus(ctx context.Context, in *VolumeServerStatusRequest, opts ...grpc.CallOption) (*VolumeServerStatusResponse, error)
+	VolumeServerLeave(ctx context.Context, in *VolumeServerLeaveRequest, opts ...grpc.CallOption) (*VolumeServerLeaveResponse, error)
 	// <experimental> query
 	Query(ctx context.Context, in *QueryRequest, opts ...grpc.CallOption) (VolumeServer_QueryClient, error)
 	VolumeNeedleStatus(ctx context.Context, in *VolumeNeedleStatusRequest, opts ...grpc.CallOption) (*VolumeNeedleStatusResponse, error)
@@ -7269,6 +7384,15 @@ func (c *volumeServerClient) VolumeServerStatus(ctx context.Context, in *VolumeS
 	return out, nil
 }
 
+func (c *volumeServerClient) VolumeServerLeave(ctx context.Context, in *VolumeServerLeaveRequest, opts ...grpc.CallOption) (*VolumeServerLeaveResponse, error) {
+	out := new(VolumeServerLeaveResponse)
+	err := c.cc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeServerLeave", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *volumeServerClient) Query(ctx context.Context, in *QueryRequest, opts ...grpc.CallOption) (VolumeServer_QueryClient, error) {
 	stream, err := c.cc.NewStream(ctx, &_VolumeServer_serviceDesc.Streams[6], "/volume_server_pb.VolumeServer/Query", opts...)
 	if err != nil {
@@ -7349,6 +7473,7 @@ type VolumeServerServer interface {
 	VolumeTierMoveDatToRemote(*VolumeTierMoveDatToRemoteRequest, VolumeServer_VolumeTierMoveDatToRemoteServer) error
 	VolumeTierMoveDatFromRemote(*VolumeTierMoveDatFromRemoteRequest, VolumeServer_VolumeTierMoveDatFromRemoteServer) error
 	VolumeServerStatus(context.Context, *VolumeServerStatusRequest) (*VolumeServerStatusResponse, error)
+	VolumeServerLeave(context.Context, *VolumeServerLeaveRequest) (*VolumeServerLeaveResponse, error)
 	// <experimental> query
 	Query(*QueryRequest, VolumeServer_QueryServer) error
 	VolumeNeedleStatus(context.Context, *VolumeNeedleStatusRequest) (*VolumeNeedleStatusResponse, error)
@@ -7457,6 +7582,9 @@ func (*UnimplementedVolumeServerServer) VolumeTierMoveDatFromRemote(*VolumeTierM
 func (*UnimplementedVolumeServerServer) VolumeServerStatus(context.Context, *VolumeServerStatusRequest) (*VolumeServerStatusResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method VolumeServerStatus not implemented")
 }
+func (*UnimplementedVolumeServerServer) VolumeServerLeave(context.Context, *VolumeServerLeaveRequest) (*VolumeServerLeaveResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method VolumeServerLeave not implemented")
+}
 func (*UnimplementedVolumeServerServer) Query(*QueryRequest, VolumeServer_QueryServer) error {
 	return status.Errorf(codes.Unimplemented, "method Query not implemented")
 }
@@ -8080,6 +8208,24 @@ func _VolumeServer_VolumeServerStatus_Handler(srv interface{}, ctx context.Conte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _VolumeServer_VolumeServerLeave_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(VolumeServerLeaveRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(VolumeServerServer).VolumeServerLeave(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/volume_server_pb.VolumeServer/VolumeServerLeave",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(VolumeServerServer).VolumeServerLeave(ctx, req.(*VolumeServerLeaveRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _VolumeServer_Query_Handler(srv interface{}, stream grpc.ServerStream) error {
 	m := new(QueryRequest)
 	if err := stream.RecvMsg(m); err != nil {
@@ -8231,6 +8377,10 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 			MethodName: "VolumeServerStatus",
 			Handler:    _VolumeServer_VolumeServerStatus_Handler,
 		},
+		{
+			MethodName: "VolumeServerLeave",
+			Handler:    _VolumeServer_VolumeServerLeave_Handler,
+		},
 		{
 			MethodName: "VolumeNeedleStatus",
 			Handler:    _VolumeServer_VolumeNeedleStatus_Handler,
diff --git a/weed/server/volume_grpc_admin.go b/weed/server/volume_grpc_admin.go
index f81ec649d..9296c63e9 100644
--- a/weed/server/volume_grpc_admin.go
+++ b/weed/server/volume_grpc_admin.go
@@ -196,6 +196,16 @@ func (vs *VolumeServer) VolumeServerStatus(ctx context.Context, req *volume_serv
 
 }
 
+func (vs *VolumeServer) VolumeServerLeave(ctx context.Context, req *volume_server_pb.VolumeServerLeaveRequest) (*volume_server_pb.VolumeServerLeaveResponse, error) {
+
+	resp := &volume_server_pb.VolumeServerLeaveResponse{}
+
+	vs.StopHeartbeat()
+
+	return resp, nil
+
+}
+
 func (vs *VolumeServer) VolumeNeedleStatus(ctx context.Context, req *volume_server_pb.VolumeNeedleStatusRequest) (*volume_server_pb.VolumeNeedleStatusResponse, error) {
 
 	resp := &volume_server_pb.VolumeNeedleStatusResponse{}
diff --git a/weed/server/volume_grpc_client_to_master.go b/weed/server/volume_grpc_client_to_master.go
index ac94ff9d4..7f3a1635c 100644
--- a/weed/server/volume_grpc_client_to_master.go
+++ b/weed/server/volume_grpc_client_to_master.go
@@ -31,7 +31,7 @@ func (vs *VolumeServer) heartbeat() {
 
 	var err error
 	var newLeader string
-	for {
+	for vs.isHeartbeating {
 		for _, master := range vs.SeedMasterNodes {
 			if newLeader != "" {
 				// the new leader may actually is the same master
@@ -52,10 +52,22 @@ func (vs *VolumeServer) heartbeat() {
 				newLeader = ""
 				vs.store.MasterAddress = ""
 			}
+			if !vs.isHeartbeating {
+				break
+			}
 		}
 	}
 }
 
+func (vs *VolumeServer) StopHeartbeat() (isAlreadyStopping bool) {
+	if !vs.isHeartbeating {
+		return true
+	}
+	vs.isHeartbeating = false
+	vs.stopChan <- true
+	return false
+}
+
 func (vs *VolumeServer) doHeartbeat(masterNode, masterGrpcAddress string, grpcDialOption grpc.DialOption, sleepInterval time.Duration) (newLeader string, err error) {
 
 	ctx, cancel := context.WithCancel(context.Background())
@@ -171,14 +183,10 @@ func (vs *VolumeServer) doHeartbeat(masterNode, masterGrpcAddress string, grpcDi
 				return "", err
 			}
 		case <-volumeTickChan:
-			if vs.SendHeartbeat {
-				glog.V(4).Infof("volume server %s:%d heartbeat", vs.store.Ip, vs.store.Port)
-				if err = stream.Send(vs.store.CollectHeartbeat()); err != nil {
-					glog.V(0).Infof("Volume Server Failed to talk with master %s: %v", masterNode, err)
-					return "", err
-				}
-			} else {
-				glog.V(4).Infof("volume server %s:%d skip send heartbeat", vs.store.Ip, vs.store.Port)
+			glog.V(4).Infof("volume server %s:%d heartbeat", vs.store.Ip, vs.store.Port)
+			if err = stream.Send(vs.store.CollectHeartbeat()); err != nil {
+				glog.V(0).Infof("Volume Server Failed to talk with master %s: %v", masterNode, err)
+				return "", err
 			}
 		case <-ecShardTickChan:
 			glog.V(4).Infof("volume server %s:%d ec heartbeat", vs.store.Ip, vs.store.Port)
@@ -188,6 +196,8 @@ func (vs *VolumeServer) doHeartbeat(masterNode, masterGrpcAddress string, grpcDi
 			}
 		case err = <-doneChan:
 			return
+		case <-vs.stopChan:
+			return
 		}
 	}
 }
diff --git a/weed/server/volume_server.go b/weed/server/volume_server.go
index 6612e9045..e9d815579 100644
--- a/weed/server/volume_server.go
+++ b/weed/server/volume_server.go
@@ -31,7 +31,8 @@ type VolumeServer struct {
 	MetricsAddress          string
 	MetricsIntervalSec      int
 	fileSizeLimitBytes      int64
-	SendHeartbeat           bool
+	isHeartbeating          bool
+	stopChan                chan bool
 }
 
 func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
@@ -67,7 +68,8 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 		grpcDialOption:          security.LoadClientTLS(util.GetViper(), "grpc.volume"),
 		compactionBytePerSecond: int64(compactionMBPerSecond) * 1024 * 1024,
 		fileSizeLimitBytes:      int64(fileSizeLimitMB) * 1024 * 1024,
-		SendHeartbeat:           true,
+		isHeartbeating:          true,
+		stopChan:                make(chan bool),
 	}
 	vs.SeedMasterNodes = masterNodes
 	vs.store = storage.NewStore(vs.grpcDialOption, port, ip, publicUrl, folders, maxCounts, minFreeSpacePercents, vs.needleMapKind)
diff --git a/weed/shell/command_volume_server_leave.go b/weed/shell/command_volume_server_leave.go
new file mode 100644
index 000000000..2a2e56e86
--- /dev/null
+++ b/weed/shell/command_volume_server_leave.go
@@ -0,0 +1,67 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"google.golang.org/grpc"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandVolumeServerLeave{})
+}
+
+type commandVolumeServerLeave struct {
+}
+
+func (c *commandVolumeServerLeave) Name() string {
+	return "volumeServer.leave"
+}
+
+func (c *commandVolumeServerLeave) Help() string {
+	return `stop a volume server from sending heartbeats to the master
+
+	volume.unmount -node <volume server host:port> -force
+
+	This command enables gracefully shutting down the volume server.
+	The volume server will stop sending heartbeats to the master.
+	After draining the traffic for a few seconds, you can safely shut down the volume server.
+
+	This operation is not revocable unless the volume server is restarted.
+`
+}
+
+func (c *commandVolumeServerLeave) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	if err = commandEnv.confirmIsLocked(); err != nil {
+		return
+	}
+
+	vsLeaveCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	volumeServer := vsLeaveCommand.String("node", "", "<host>:<port> of the volume server")
+	if err = vsLeaveCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	if *volumeServer == "" {
+		return fmt.Errorf("need to specify volume server by -node=<host>:<port>")
+	}
+
+	return volumeServerLeave(commandEnv.option.GrpcDialOption, *volumeServer, writer)
+
+}
+
+func volumeServerLeave(grpcDialOption grpc.DialOption, volumeServer string, writer io.Writer) (err error) {
+	return operation.WithVolumeServerClient(volumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+		_, leaveErr := volumeServerClient.VolumeServerLeave(context.Background(), &volume_server_pb.VolumeServerLeaveRequest{})
+		if leaveErr != nil {
+			fmt.Fprintf(writer, "ask volume server %s to leave: %v\n", volumeServer, leaveErr)
+		} else {
+			fmt.Fprintf(writer, "stopped heartbeat in volume server %s. After a few seconds to drain traffic, it will be safe to stop the volume server.\n", volumeServer)
+		}
+		return leaveErr
+	})
+}
diff --git a/weed/shell/shell_liner.go b/weed/shell/shell_liner.go
index 4632a1fb0..2d5166acf 100644
--- a/weed/shell/shell_liner.go
+++ b/weed/shell/shell_liner.go
@@ -66,7 +66,7 @@ func processEachCmd(reg *regexp.Regexp, cmd string, commandEnv *CommandEnv) bool
 			args[i] = strings.Trim(string(cmds[1+i]), "\"'")
 		}
 
-		cmd := strings.ToLower(cmds[0])
+		cmd := cmds[0]
 		if cmd == "help" || cmd == "?" {
 			printHelp(cmds)
 		} else if cmd == "exit" || cmd == "quit" {