Add GetCount and implement GetCollectionStatistics

Signed-off-by: sunby <bingyi.sun@zilliz.com>

.jenkins/modules/Publish/Publish.groovy

@@ -33,6 +33,10 @@ dir ('build/docker/deploy') {
             sh 'docker-compose build --force-rm queryservice'
             sh 'docker-compose push queryservice'
 
+            sh 'docker pull ${SOURCE_REPO}/dataservice:${SOURCE_TAG} || true'
+            sh 'docker-compose build --force-rm dataservice'
+            sh 'docker-compose push dataservice'
+
             sh 'docker pull registry.zilliz.com/milvus-distributed/milvus-distributed-dev:latest || true'
             sh 'docker pull ${SOURCE_REPO}/querynode:${SOURCE_TAG} || true'
             sh 'docker-compose build --force-rm querynode'

.jenkins/modules/Regression/PythonRegression.groovy

@@ -10,6 +10,7 @@ try {
         sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d indexservice'
         sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d indexnode'
         sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d queryservice'
+        sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d dataservice'
         sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} run -e QUERY_NODE_ID=1 -d querynode'
         sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} run -e QUERY_NODE_ID=2 -d querynode'
         sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} run -e DATA_NODE_ID=3 -d datanode'

build/docker/deploy/.env

@@ -9,3 +9,4 @@ MINIO_ADDRESS=minio:9000
 PROXY_NODE_HOST=proxynode
 PROXY_SERVICE_ADDRESS=proxyservice:19530
 INDEX_SERVICE_ADDRESS=indexservice:31000
+DATA_SERVICE_ADDRESS=dataservice:13333

build/docker/deploy/dataservice/DockerFile

@@ -0,0 +1,41 @@
+# Copyright (C) 2019-2020 Zilliz. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License
+# is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+# or implied. See the License for the specific language governing permissions and limitations under the License.
+
+FROM milvusdb/milvus-distributed-dev:amd64-ubuntu18.04-latest AS openblas
+
+#FROM alpine
+FROM ubuntu:bionic-20200921
+
+RUN apt-get update && apt-get install -y --no-install-recommends libtbb-dev gfortran
+
+#RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
+
+#RUN sed -i "s/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g" /etc/apk/repositories \
+#      && apk add --no-cache libtbb gfortran
+
+COPY --from=openblas /usr/lib/libopenblas-r0.3.9.so /usr/lib/
+
+RUN ln -s /usr/lib/libopenblas-r0.3.9.so /usr/lib/libopenblas.so.0 && \
+    ln -s /usr/lib/libopenblas.so.0 /usr/lib/libopenblas.so
+
+COPY ./bin/dataservice /milvus-distributed/bin/dataservice
+
+COPY ./configs/ /milvus-distributed/configs/
+
+COPY ./lib/ /milvus-distributed/lib/
+
+ENV LD_LIBRARY_PATH=/milvus-distributed/lib:$LD_LIBRARY_PATH:/usr/lib
+
+WORKDIR /milvus-distributed/
+
+CMD ["./bin/dataservice"]
+
+EXPOSE 13333

build/docker/deploy/docker-compose.yml

@@ -100,5 +100,21 @@ services:
     networks:
       - milvus
 
+  dataservice:
+    image: ${TARGET_REPO}/dataservice:${TARGET_TAG}
+    build:
+      context: ../../../
+      dockerfile: build/docker/deploy/dataservice/Dockerfile
+      cache_from:
+        - ${SOURCE_REPO}/dataservice:${SOURCE_TAG}
+    environment:
+      PULSAR_ADDRESS: ${PULSAR_ADDRESS}
+      ETCD_ADDRESS: ${ETCD_ADDRESS}
+      MASTER_ADDRESS: ${MASTER_ADDRESS}
+      MINIO_ADDRESS: ${MINIO_ADDRESS}
+    networks:
+      - milvus
+
+
 networks:
   milvus:

internal/dataservice/dd_handler.go

@@ -57,11 +57,8 @@ func (handler *ddHandler) handleCreateCollection(msg *msgstream.CreateCollection
 }
 
 func (handler *ddHandler) handleDropCollection(msg *msgstream.DropCollectionMsg) error {
-	ids := handler.meta.GetSegmentsByCollectionID(msg.CollectionID)
-	for _, id := range ids {
-		if err := handler.meta.DropSegment(id); err != nil {
-			continue
-		}
+	segmentsOfCollection := handler.meta.GetSegmentsOfCollection(msg.CollectionID)
+	for _, id := range segmentsOfCollection {
 		handler.segmentAllocator.DropSegment(id)
 	}
 	if err := handler.meta.DropCollection(msg.CollectionID); err != nil {
@@ -71,11 +68,8 @@ func (handler *ddHandler) handleDropCollection(msg *msgstream.DropCollectionMsg)
 }
 
 func (handler *ddHandler) handleDropPartition(msg *msgstream.DropPartitionMsg) error {
-	ids := handler.meta.GetSegmentsByCollectionAndPartitionID(msg.CollectionID, msg.PartitionID)
-	for _, id := range ids {
-		if err := handler.meta.DropSegment(id); err != nil {
-			return err
-		}
+	segmentsOfPartition := handler.meta.GetSegmentsOfPartition(msg.CollectionID, msg.PartitionID)
+	for _, id := range segmentsOfPartition {
 		handler.segmentAllocator.DropSegment(id)
 	}
 	if err := handler.meta.DropPartition(msg.CollectionID, msg.PartitionID); err != nil {

internal/dataservice/meta.go

@@ -97,6 +97,17 @@ func (meta *meta) DropCollection(collID UniqueID) error {
 	if _, ok := meta.collID2Info[collID]; !ok {
 		return newErrCollectionNotFound(collID)
 	}
+	ids := make([]UniqueID, 0)
+	for i, info := range meta.segID2Info {
+		if info.CollectionID == collID {
+			delete(meta.segID2Info, i)
+			ids = append(ids, i)
+		}
+	}
+	if err := meta.removeSegments(ids); err != nil {
+		_ = meta.reloadFromKV()
+		return err
+	}
 	delete(meta.collID2Info, collID)
 	return nil
 }
@@ -118,6 +129,30 @@ func (meta *meta) GetCollection(collectionID UniqueID) (*collectionInfo, error)
 	return collectionInfo, nil
 }
 
+func (meta *meta) GetNumRowsOfCollection(collectionID UniqueID) (int64, error) {
+	meta.ddLock.RLock()
+	defer meta.ddLock.RUnlock()
+	var ret int64 = 0
+	for _, info := range meta.segID2Info {
+		if info.CollectionID == collectionID {
+			ret += info.NumRows
+		}
+	}
+	return ret, nil
+}
+
+func (meta *meta) GetMemSizeOfCollection(collectionID UniqueID) (int64, error) {
+	meta.ddLock.RLock()
+	defer meta.ddLock.RUnlock()
+	var ret int64 = 0
+	for _, info := range meta.segID2Info {
+		if info.CollectionID == collectionID {
+			ret += info.MemSize
+		}
+	}
+	return ret, nil
+}
+
 func (meta *meta) AddSegment(segmentInfo *datapb.SegmentInfo) error {
 	meta.ddLock.Lock()
 	defer meta.ddLock.Unlock()
@@ -152,6 +187,10 @@ func (meta *meta) DropSegment(segmentID UniqueID) error {
 		return newErrSegmentNotFound(segmentID)
 	}
 	delete(meta.segID2Info, segmentID)
+	if err := meta.removeSegmentInfo(segmentID); err != nil {
+		_ = meta.reloadFromKV()
+		return err
+	}
 	return nil
 }
 
@@ -240,7 +279,7 @@ func (meta *meta) SetSegmentState(segmentID UniqueID, state datapb.SegmentState)
 	return nil
 }
 
-func (meta *meta) GetSegmentsByCollectionID(collectionID UniqueID) []UniqueID {
+func (meta *meta) GetSegmentsOfCollection(collectionID UniqueID) []UniqueID {
 	meta.ddLock.RLock()
 	defer meta.ddLock.RUnlock()
 
@@ -253,7 +292,7 @@ func (meta *meta) GetSegmentsByCollectionID(collectionID UniqueID) []UniqueID {
 	return ret
 }
 
-func (meta *meta) GetSegmentsByCollectionAndPartitionID(collectionID, partitionID UniqueID) []UniqueID {
+func (meta *meta) GetSegmentsOfPartition(collectionID, partitionID UniqueID) []UniqueID {
 	meta.ddLock.RLock()
 	defer meta.ddLock.RUnlock()
 
@@ -291,7 +330,6 @@ func (meta *meta) DropPartition(collID UniqueID, partitionID UniqueID) error {
 	if !ok {
 		return newErrCollectionNotFound(collID)
 	}
-
 	idx := -1
 	for i, id := range collection.Partitions {
 		if partitionID == id {
@@ -299,15 +337,37 @@ func (meta *meta) DropPartition(collID UniqueID, partitionID UniqueID) error {
 			break
 		}
 	}
-
 	if idx == -1 {
 		return fmt.Errorf("cannot find partition id %d", partitionID)
 	}
 
+	ids := make([]UniqueID, 0)
+	for i, info := range meta.segID2Info {
+		if info.PartitionID == partitionID {
+			delete(meta.segID2Info, i)
+			ids = append(ids, i)
+		}
+	}
+	if err := meta.removeSegments(ids); err != nil {
+		_ = meta.reloadFromKV()
+		return err
+	}
 	collection.Partitions = append(collection.Partitions[:idx], collection.Partitions[idx+1:]...)
 	return nil
 }
 
+func (meta *meta) GetNumRowsOfPartition(collectionID UniqueID, partitionID UniqueID) (int64, error) {
+	meta.ddLock.RLock()
+	defer meta.ddLock.RUnlock()
+	var ret int64 = 0
+	for _, info := range meta.segID2Info {
+		if info.CollectionID == collectionID && info.PartitionID == partitionID {
+			ret += info.NumRows
+		}
+	}
+	return ret, nil
+}
+
 func (meta *meta) saveSegmentInfo(segmentInfo *datapb.SegmentInfo) error {
 	segBytes := proto.MarshalTextString(segmentInfo)
 
@@ -317,6 +377,15 @@ func (meta *meta) saveSegmentInfo(segmentInfo *datapb.SegmentInfo) error {
 func (meta *meta) removeSegmentInfo(segID UniqueID) error {
 	return meta.client.Remove("/segment/" + strconv.FormatInt(segID, 10))
 }
+
+func (meta *meta) removeSegments(segIDs []UniqueID) error {
+	segmentPaths := make([]string, len(segIDs))
+	for i, id := range segIDs {
+		segmentPaths[i] = "/segment/" + strconv.FormatInt(id, 10)
+	}
+	return meta.client.MultiRemove(segmentPaths)
+}
+
 func BuildSegment(collectionID UniqueID, partitionID UniqueID, segmentID UniqueID, channelRange []string) (*datapb.SegmentInfo, error) {
 	return &datapb.SegmentInfo{
 		SegmentID:      segmentID,

internal/dataservice/meta_test.go

@@ -55,10 +55,10 @@ func TestSegment(t *testing.T) {
 	info, err := meta.GetSegment(segmentInfo.SegmentID)
 	assert.Nil(t, err)
 	assert.EqualValues(t, segmentInfo, info)
-	ids := meta.GetSegmentsByCollectionID(id)
+	ids := meta.GetSegmentsOfCollection(id)
 	assert.EqualValues(t, 1, len(ids))
 	assert.EqualValues(t, segmentInfo.SegmentID, ids[0])
-	ids = meta.GetSegmentsByCollectionAndPartitionID(id, 100)
+	ids = meta.GetSegmentsOfPartition(id, 100)
 	assert.EqualValues(t, 1, len(ids))
 	assert.EqualValues(t, segmentInfo.SegmentID, ids[0])
 	err = meta.SealSegment(segmentInfo.SegmentID, 100)
@@ -102,3 +102,31 @@ func TestPartition(t *testing.T) {
 	err = meta.DropPartition(id, 10)
 	assert.NotNil(t, err)
 }
+
+func TestGetCount(t *testing.T) {
+	mockAllocator := newMockAllocator()
+	meta, err := newMemoryMeta(mockAllocator)
+	assert.Nil(t, err)
+	id, err := mockAllocator.allocID()
+	assert.Nil(t, err)
+	segID, err := mockAllocator.allocID()
+	assert.Nil(t, err)
+	nums, err := meta.GetNumRowsOfCollection(id)
+	assert.Nil(t, err)
+	assert.EqualValues(t, 0, nums)
+	segment, err := BuildSegment(id, 100, segID, []string{"c1"})
+	assert.Nil(t, err)
+	segment.NumRows = 100
+	err = meta.AddSegment(segment)
+	assert.Nil(t, err)
+	segID, err = mockAllocator.allocID()
+	assert.Nil(t, err)
+	segment, err = BuildSegment(id, 100, segID, []string{"c1"})
+	assert.Nil(t, err)
+	segment.NumRows = 300
+	err = meta.AddSegment(segment)
+	assert.Nil(t, err)
+	nums, err = meta.GetNumRowsOfCollection(id)
+	assert.Nil(t, err)
+	assert.EqualValues(t, 400, nums)
+}

internal/dataservice/server.go

@@ -51,6 +51,7 @@ type DataService interface {
 	GetCollectionStatistics(req *datapb.CollectionStatsRequest) (*datapb.CollectionStatsResponse, error)
 	GetPartitionStatistics(req *datapb.PartitionStatsRequest) (*datapb.PartitionStatsResponse, error)
 	GetComponentStates() (*internalpb2.ComponentStates, error)
+	GetCount(req *datapb.CollectionCountRequest) (*datapb.CollectionCountResponse, error)
 }
 
 type MasterClient interface {
@@ -606,7 +607,7 @@ func (s *Server) ShowSegments(req *datapb.ShowSegmentRequest) (*datapb.ShowSegme
 		resp.Status.Reason = "server is initializing"
 		return resp, nil
 	}
-	ids := s.meta.GetSegmentsByCollectionAndPartitionID(req.CollectionID, req.PartitionID)
+	ids := s.meta.GetSegmentsOfPartition(req.CollectionID, req.PartitionID)
 	resp.Status.ErrorCode = commonpb.ErrorCode_SUCCESS
 	resp.SegmentIDs = ids
 	return resp, nil
@@ -696,8 +697,25 @@ func (s *Server) GetInsertChannels(req *datapb.InsertChannelRequest) ([]string,
 }
 
 func (s *Server) GetCollectionStatistics(req *datapb.CollectionStatsRequest) (*datapb.CollectionStatsResponse, error) {
-	// todo implement
-	return nil, nil
+	resp := &datapb.CollectionStatsResponse{
+		Status: &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UNEXPECTED_ERROR,
+		},
+	}
+	nums, err := s.meta.GetNumRowsOfCollection(req.CollectionID)
+	if err != nil {
+		resp.Status.Reason = err.Error()
+		return resp, nil
+	}
+	memsize, err := s.meta.GetMemSizeOfCollection(req.CollectionID)
+	if err != nil {
+		resp.Status.Reason = err.Error()
+		return resp, nil
+	}
+	resp.Status.ErrorCode = commonpb.ErrorCode_SUCCESS
+	resp.Stats = append(resp.Stats, &commonpb.KeyValuePair{Key: "nums", Value: strconv.FormatInt(nums, 10)})
+	resp.Stats = append(resp.Stats, &commonpb.KeyValuePair{Key: "memsize", Value: strconv.FormatInt(memsize, 10)})
+	return resp, nil
 }
 
 func (s *Server) GetPartitionStatistics(req *datapb.PartitionStatsRequest) (*datapb.PartitionStatsResponse, error) {
@@ -708,3 +726,19 @@ func (s *Server) GetPartitionStatistics(req *datapb.PartitionStatsRequest) (*dat
 func (s *Server) GetSegmentInfoChannel() (string, error) {
 	return Params.SegmentInfoChannelName, nil
 }
+
+func (s *Server) GetCount(req *datapb.CollectionCountRequest) (*datapb.CollectionCountResponse, error) {
+	resp := &datapb.CollectionCountResponse{
+		Status: &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_UNEXPECTED_ERROR,
+		},
+	}
+	nums, err := s.meta.GetNumRowsOfCollection(req.CollectionID)
+	if err != nil {
+		resp.Status.Reason = err.Error()
+		return resp, nil
+	}
+	resp.Count = nums
+	resp.Status.ErrorCode = commonpb.ErrorCode_SUCCESS
+	return resp, nil
+}

internal/distributed/dataservice/client.go

@@ -133,3 +133,7 @@ func (c *Client) GetSegmentInfoChannel() (string, error) {
 	}
 	return resp.Value, nil
 }
+
+func (c *Client) GetCount(req *datapb.CollectionCountRequest) (*datapb.CollectionCountResponse, error) {
+	return c.grpcClient.GetCount(context.Background(), req)
+}

internal/distributed/dataservice/grpc_service.go

@@ -178,3 +178,7 @@ func (s *Service) GetSegmentInfoChannel(ctx context.Context, empty *commonpb.Emp
 	resp.Value = channel
 	return resp, nil
 }
+
+func (s *Service) GetCount(ctx context.Context, request *datapb.CollectionCountRequest) (*datapb.CollectionCountResponse, error) {
+	return s.server.GetCount(request)
+}

internal/proto/data_service.proto

@@ -155,8 +155,8 @@ message SegmentMsg{
 
 message CollectionStatsRequest{
   common.MsgBase base = 1;
-  string dbID = 2;
-  string collectionID = 3;
+  int64 dbID = 2;
+  int64 collectionID = 3;
 }
 
 message CollectionStatsResponse {
@@ -166,9 +166,9 @@ message CollectionStatsResponse {
 
 message PartitionStatsRequest{
   common.MsgBase base = 1;
-  string dbID = 2;
-  string collectionID = 3;
-  string partitionID = 4;
+  int64 dbID = 2;
+  int64 collectionID = 3;
+  int64 partitionID = 4;
 }
 
 message PartitionStatsResponse {
@@ -192,6 +192,17 @@ message DDLFlushMeta {
   repeated string binlog_paths = 2;
 }
 
+message CollectionCountRequest{
+  common.MsgBase base = 1;
+  int64 dbID = 2;
+  int64 collectionID = 3;
+}
+
+message CollectionCountResponse{
+  common.Status status = 1;
+  int64 count = 2;
+}
+
 service DataService {
 
   rpc RegisterNode(RegisterNodeRequest) returns (RegisterNodeResponse) {}
@@ -212,6 +223,7 @@ service DataService {
   rpc GetStatisticsChannel(common.Empty) returns(milvus.StringResponse){}
 
   rpc GetSegmentInfoChannel(common.Empty) returns (milvus.StringResponse){}
+   rpc GetCount(CollectionCountRequest) returns (CollectionCountResponse){}
 }
 
 service DataNode {

internal/proto/datapb/data_service.pb.go

@@ -1236,8 +1236,8 @@ func (m *SegmentMsg) GetSegment() *SegmentInfo {
 
 type CollectionStatsRequest struct {
 	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
-	DbID                 string            `protobuf:"bytes,2,opt,name=dbID,proto3" json:"dbID,omitempty"`
-	CollectionID         string            `protobuf:"bytes,3,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
+	DbID                 int64             `protobuf:"varint,2,opt,name=dbID,proto3" json:"dbID,omitempty"`
+	CollectionID         int64             `protobuf:"varint,3,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
 	XXX_unrecognized     []byte            `json:"-"`
 	XXX_sizecache        int32             `json:"-"`
@@ -1275,18 +1275,18 @@ func (m *CollectionStatsRequest) GetBase() *commonpb.MsgBase {
 	return nil
 }
 
-func (m *CollectionStatsRequest) GetDbID() string {
+func (m *CollectionStatsRequest) GetDbID() int64 {
 	if m != nil {
 		return m.DbID
 	}
-	return ""
+	return 0
 }
 
-func (m *CollectionStatsRequest) GetCollectionID() string {
+func (m *CollectionStatsRequest) GetCollectionID() int64 {
 	if m != nil {
 		return m.CollectionID
 	}
-	return ""
+	return 0
 }
 
 type CollectionStatsResponse struct {
@@ -1338,9 +1338,9 @@ func (m *CollectionStatsResponse) GetStatus() *commonpb.Status {
 
 type PartitionStatsRequest struct {
 	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
-	DbID                 string            `protobuf:"bytes,2,opt,name=dbID,proto3" json:"dbID,omitempty"`
-	CollectionID         string            `protobuf:"bytes,3,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
-	PartitionID          string            `protobuf:"bytes,4,opt,name=partitionID,proto3" json:"partitionID,omitempty"`
+	DbID                 int64             `protobuf:"varint,2,opt,name=dbID,proto3" json:"dbID,omitempty"`
+	CollectionID         int64             `protobuf:"varint,3,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
+	PartitionID          int64             `protobuf:"varint,4,opt,name=partitionID,proto3" json:"partitionID,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
 	XXX_unrecognized     []byte            `json:"-"`
 	XXX_sizecache        int32             `json:"-"`
@@ -1378,25 +1378,25 @@ func (m *PartitionStatsRequest) GetBase() *commonpb.MsgBase {
 	return nil
 }
 
-func (m *PartitionStatsRequest) GetDbID() string {
+func (m *PartitionStatsRequest) GetDbID() int64 {
 	if m != nil {
 		return m.DbID
 	}
-	return ""
+	return 0
 }
 
-func (m *PartitionStatsRequest) GetCollectionID() string {
+func (m *PartitionStatsRequest) GetCollectionID() int64 {
 	if m != nil {
 		return m.CollectionID
 	}
-	return ""
+	return 0
 }
 
-func (m *PartitionStatsRequest) GetPartitionID() string {
+func (m *PartitionStatsRequest) GetPartitionID() int64 {
 	if m != nil {
 		return m.PartitionID
 	}
-	return ""
+	return 0
 }
 
 type PartitionStatsResponse struct {
@@ -1595,6 +1595,108 @@ func (m *DDLFlushMeta) GetBinlogPaths() []string {
 	return nil
 }
 
+type CollectionCountRequest struct {
+	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
+	DbID                 int64             `protobuf:"varint,2,opt,name=dbID,proto3" json:"dbID,omitempty"`
+	CollectionID         int64             `protobuf:"varint,3,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *CollectionCountRequest) Reset()         { *m = CollectionCountRequest{} }
+func (m *CollectionCountRequest) String() string { return proto.CompactTextString(m) }
+func (*CollectionCountRequest) ProtoMessage()    {}
+func (*CollectionCountRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_3385cd32ad6cfe64, []int{26}
+}
+
+func (m *CollectionCountRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CollectionCountRequest.Unmarshal(m, b)
+}
+func (m *CollectionCountRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CollectionCountRequest.Marshal(b, m, deterministic)
+}
+func (m *CollectionCountRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CollectionCountRequest.Merge(m, src)
+}
+func (m *CollectionCountRequest) XXX_Size() int {
+	return xxx_messageInfo_CollectionCountRequest.Size(m)
+}
+func (m *CollectionCountRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_CollectionCountRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CollectionCountRequest proto.InternalMessageInfo
+
+func (m *CollectionCountRequest) GetBase() *commonpb.MsgBase {
+	if m != nil {
+		return m.Base
+	}
+	return nil
+}
+
+func (m *CollectionCountRequest) GetDbID() int64 {
+	if m != nil {
+		return m.DbID
+	}
+	return 0
+}
+
+func (m *CollectionCountRequest) GetCollectionID() int64 {
+	if m != nil {
+		return m.CollectionID
+	}
+	return 0
+}
+
+type CollectionCountResponse struct {
+	Status               *commonpb.Status `protobuf:"bytes,1,opt,name=status,proto3" json:"status,omitempty"`
+	Count                int64            `protobuf:"varint,2,opt,name=count,proto3" json:"count,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *CollectionCountResponse) Reset()         { *m = CollectionCountResponse{} }
+func (m *CollectionCountResponse) String() string { return proto.CompactTextString(m) }
+func (*CollectionCountResponse) ProtoMessage()    {}
+func (*CollectionCountResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_3385cd32ad6cfe64, []int{27}
+}
+
+func (m *CollectionCountResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CollectionCountResponse.Unmarshal(m, b)
+}
+func (m *CollectionCountResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CollectionCountResponse.Marshal(b, m, deterministic)
+}
+func (m *CollectionCountResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CollectionCountResponse.Merge(m, src)
+}
+func (m *CollectionCountResponse) XXX_Size() int {
+	return xxx_messageInfo_CollectionCountResponse.Size(m)
+}
+func (m *CollectionCountResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_CollectionCountResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CollectionCountResponse proto.InternalMessageInfo
+
+func (m *CollectionCountResponse) GetStatus() *commonpb.Status {
+	if m != nil {
+		return m.Status
+	}
+	return nil
+}
+
+func (m *CollectionCountResponse) GetCount() int64 {
+	if m != nil {
+		return m.Count
+	}
+	return 0
+}
+
 func init() {
 	proto.RegisterEnum("milvus.proto.data.SegmentState", SegmentState_name, SegmentState_value)
 	proto.RegisterType((*RegisterNodeRequest)(nil), "milvus.proto.data.RegisterNodeRequest")
@@ -1623,112 +1725,116 @@ func init() {
 	proto.RegisterType((*FieldFlushMeta)(nil), "milvus.proto.data.FieldFlushMeta")
 	proto.RegisterType((*SegmentFlushMeta)(nil), "milvus.proto.data.SegmentFlushMeta")
 	proto.RegisterType((*DDLFlushMeta)(nil), "milvus.proto.data.DDLFlushMeta")
+	proto.RegisterType((*CollectionCountRequest)(nil), "milvus.proto.data.CollectionCountRequest")
+	proto.RegisterType((*CollectionCountResponse)(nil), "milvus.proto.data.CollectionCountResponse")
 }
 
 func init() { proto.RegisterFile("data_service.proto", fileDescriptor_3385cd32ad6cfe64) }
 
 var fileDescriptor_3385cd32ad6cfe64 = []byte{
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1756,6 +1862,7 @@ type DataServiceClient interface {
 	GetTimeTickChannel(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*milvuspb.StringResponse, error)
 	GetStatisticsChannel(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*milvuspb.StringResponse, error)
 	GetSegmentInfoChannel(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*milvuspb.StringResponse, error)
+	GetCount(ctx context.Context, in *CollectionCountRequest, opts ...grpc.CallOption) (*CollectionCountResponse, error)
 }
 
 type dataServiceClient struct {
@@ -1883,6 +1990,15 @@ func (c *dataServiceClient) GetSegmentInfoChannel(ctx context.Context, in *commo
 	return out, nil
 }
 
+func (c *dataServiceClient) GetCount(ctx context.Context, in *CollectionCountRequest, opts ...grpc.CallOption) (*CollectionCountResponse, error) {
+	out := new(CollectionCountResponse)
+	err := c.cc.Invoke(ctx, "/milvus.proto.data.DataService/GetCount", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // DataServiceServer is the server API for DataService service.
 type DataServiceServer interface {
 	RegisterNode(context.Context, *RegisterNodeRequest) (*RegisterNodeResponse, error)
@@ -1898,6 +2014,7 @@ type DataServiceServer interface {
 	GetTimeTickChannel(context.Context, *commonpb.Empty) (*milvuspb.StringResponse, error)
 	GetStatisticsChannel(context.Context, *commonpb.Empty) (*milvuspb.StringResponse, error)
 	GetSegmentInfoChannel(context.Context, *commonpb.Empty) (*milvuspb.StringResponse, error)
+	GetCount(context.Context, *CollectionCountRequest) (*CollectionCountResponse, error)
 }
 
 // UnimplementedDataServiceServer can be embedded to have forward compatible implementations.
@@ -1943,6 +2060,9 @@ func (*UnimplementedDataServiceServer) GetStatisticsChannel(ctx context.Context,
 func (*UnimplementedDataServiceServer) GetSegmentInfoChannel(ctx context.Context, req *commonpb.Empty) (*milvuspb.StringResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetSegmentInfoChannel not implemented")
 }
+func (*UnimplementedDataServiceServer) GetCount(ctx context.Context, req *CollectionCountRequest) (*CollectionCountResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetCount not implemented")
+}
 
 func RegisterDataServiceServer(s *grpc.Server, srv DataServiceServer) {
 	s.RegisterService(&_DataService_serviceDesc, srv)
@@ -2182,6 +2302,24 @@ func _DataService_GetSegmentInfoChannel_Handler(srv interface{}, ctx context.Con
 	return interceptor(ctx, in, info, handler)
 }
 
+func _DataService_GetCount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CollectionCountRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(DataServiceServer).GetCount(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milvus.proto.data.DataService/GetCount",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(DataServiceServer).GetCount(ctx, req.(*CollectionCountRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _DataService_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "milvus.proto.data.DataService",
 	HandlerType: (*DataServiceServer)(nil),
@@ -2238,6 +2376,10 @@ var _DataService_serviceDesc = grpc.ServiceDesc{
 			MethodName: "GetSegmentInfoChannel",
 			Handler:    _DataService_GetSegmentInfoChannel_Handler,
 		},
+		{
+			MethodName: "GetCount",
+			Handler:    _DataService_GetCount_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "data_service.proto",