Add proxy service to ci workflow

Signed-off-by: dragondriver <jiquan.long@zilliz.com>
2024-11-29 18:38:44 +08:00 · 2021-01-22 12:57:23 +08:00 · 2021-01-22 12:57:23 +08:00 · cd52adc18b
commit cd52adc18b
parent 90a0b8b2f5
32 changed files with 2036 additions and 367 deletions
--- a/.jenkins/modules/Publish/Publish.groovy
+++ b/.jenkins/modules/Publish/Publish.groovy
@ -21,6 +21,10 @@ dir ('build/docker/deploy') {
            sh 'docker-compose build --force-rm indexbuilder'
            sh 'docker-compose push indexbuilder'

+            sh 'docker pull ${SOURCE_REPO}/proxyservice:${SOURCE_TAG} || true'
+            sh 'docker-compose build --force-rm proxyservice'
+            sh 'docker-compose push proxyservice'
+
            sh 'docker pull ${SOURCE_REPO}/proxynode:${SOURCE_TAG} || true'
            sh 'docker-compose build --force-rm proxynode'
            sh 'docker-compose push proxynode'
--- a/.jenkins/modules/Regression/PythonRegression.groovy
+++ b/.jenkins/modules/Regression/PythonRegression.groovy
@ -7,6 +7,7 @@ try {
        sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} pull'
        sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d master'
        sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d indexbuilder'
+        sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d proxyservice'
        sh 'docker-compose -p ${DOCKER_COMPOSE_PROJECT_NAME} up -d proxynode'
        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'
--- a/4
+++ b/4
@ -113,6 +113,8 @@ build-go: build-cpp
 	@echo "Building each component's binary to './bin'"
 	@echo "Building master ..."
 	@mkdir -p $(INSTALL_PATH) && go env -w CGO_ENABLED="0" && GO111MODULE=on $(GO) build -o $(INSTALL_PATH)/master $(PWD)/cmd/master/main.go 1>/dev/null
+	@echo "Building proxy service ..."
+	@mkdir -p $(INSTALL_PATH) && go env -w CGO_ENABLED="0" && GO111MODULE=on $(GO) build -o $(INSTALL_PATH)/proxyservice $(PWD)/cmd/proxy/service/proxy_service.go 1>/dev/null
 	@echo "Building proxy node ..."
 	@mkdir -p $(INSTALL_PATH) && go env -w CGO_ENABLED="0" && GO111MODULE=on $(GO) build -o $(INSTALL_PATH)/proxynode $(PWD)/cmd/proxy/node/proxy_node.go 1>/dev/null
 	@echo "Building query node ..."
@ -166,6 +168,7 @@ install: all
 	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/querynode $(GOPATH)/bin/querynode
 	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/master $(GOPATH)/bin/master
 	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/proxynode $(GOPATH)/bin/proxynode
+	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/proxyservice $(GOPATH)/bin/proxyservice
 	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/writenode $(GOPATH)/bin/writenode
 	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/indexbuilder $(GOPATH)/bin/indexbuilder
 	@mkdir -p $(GOPATH)/bin && cp -f $(PWD)/bin/singlenode $(GOPATH)/bin/singlenode
@ -180,6 +183,7 @@ clean:
 	@rm -rf lib/
 	@rm -rf $(GOPATH)/bin/master
 	@rm -rf $(GOPATH)/bin/proxynode
+	@rm -rf $(GOPATH)/bin/proxyservice
 	@rm -rf $(GOPATH)/bin/querynode
 	@rm -rf $(GOPATH)/bin/writenode
 	@rm -rf $(GOPATH)/bin/indexbuilder
--- a/build/docker/deploy/.env
+++ b/build/docker/deploy/.env
@ -7,3 +7,5 @@ ETCD_ADDRESS=etcd:2379
 MASTER_ADDRESS=master:53100
 MINIO_ADDRESS=minio:9000
 INDEX_BUILDER_ADDRESS=indexbuilder:31000
+PROXY_NODE_HOST=proxynode
+PROXY_SERVICE_ADDRESS=proxyservice:19530
--- a/build/docker/deploy/docker-compose.yml
+++ b/build/docker/deploy/docker-compose.yml
@ -15,6 +15,16 @@ services:
    networks: 
      - milvus

+  proxyservice:
+    image: ${TARGET_REPO}/proxyservice:${TARGET_TAG}
+    build:
+      context: ../../../
+      dockerfile: build/docker/deploy/proxyservice/DockerFile
+      cache_from:
+        - ${SOURCE_REPO}/proxyservice:${SOURCE_TAG}
+    networks:
+      - milvus
+
  proxynode:
    image: ${TARGET_REPO}/proxynode:${TARGET_TAG}
    build:
@ -25,7 +35,9 @@ services:
    environment: 
      PULSAR_ADDRESS: ${PULSAR_ADDRESS}
      MASTER_ADDRESS: ${MASTER_ADDRESS}
-    networks: 
+      PROXY_NODE_HOST: ${PROXY_NODE_HOST}
+      PROXY_SERVICE_ADDRESS: ${PROXY_SERVICE_ADDRESS}
+    networks:
      - milvus

  indexbuilder:
--- a/build/docker/deploy/proxyservice/DockerFile
+++ b/build/docker/deploy/proxyservice/DockerFile
@ -0,0 +1,22 @@
+# 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 alpine:3.12.1
+
+COPY ./bin/proxyservice /milvus-distributed/bin/proxyservice
+
+COPY ./configs/ /milvus-distributed/configs/
+
+WORKDIR /milvus-distributed/
+
+CMD ["./bin/proxyservice"]
+
+EXPOSE 19530
--- a/build/docker/test/docker-compose.yml
+++ b/build/docker/test/docker-compose.yml
@ -12,7 +12,7 @@ services:
      - ../../..:/milvus-distributed:delegated
    working_dir: "/milvus-distributed/tests/python"
    command: >
-      /bin/bash -c "pytest --ip proxynode"
+      /bin/bash -c "pytest --ip proxyservice"
    networks:
      - milvus

--- a/cmd/proxy/service/proxy_service.go
+++ b/cmd/proxy/service/proxy_service.go
@ -0,0 +1,59 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	grpcproxyservice "github.com/zilliztech/milvus-distributed/internal/distributed/proxyservice"
+
+	"go.uber.org/zap"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	svr, err := grpcproxyservice.CreateProxyServiceServer()
+	if err != nil {
+		log.Print("create server failed", zap.Error(err))
+	}
+
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc,
+		syscall.SIGHUP,
+		syscall.SIGINT,
+		syscall.SIGTERM,
+		syscall.SIGQUIT)
+
+	var sig os.Signal
+	go func() {
+		sig = <-sc
+		cancel()
+	}()
+
+	if err := svr.Init(); err != nil {
+		log.Fatal("init server failed", zap.Error(err))
+	}
+
+	if err := svr.Start(); err != nil {
+		log.Fatal("run server failed", zap.Error(err))
+	}
+
+	<-ctx.Done()
+	log.Print("Got signal to exit", zap.String("signal", sig.String()))
+
+	if err := svr.Stop(); err != nil {
+		log.Fatal("stop server failed", zap.Error(err))
+	}
+	switch sig {
+	case syscall.SIGTERM:
+		exit(0)
+	default:
+		exit(1)
+	}
+}
+
+func exit(code int) {
+	os.Exit(code)
+}
--- a/cmd/singlenode/main.go
+++ b/cmd/singlenode/main.go
@ -16,7 +16,7 @@ import (

 	"github.com/zilliztech/milvus-distributed/internal/indexnode"
 	"github.com/zilliztech/milvus-distributed/internal/master"
-	proxynodeimpl "github.com/zilliztech/milvus-distributed/internal/proxynode"
+	"github.com/zilliztech/milvus-distributed/internal/proxynode"
 	"github.com/zilliztech/milvus-distributed/internal/querynode"
 	"github.com/zilliztech/milvus-distributed/internal/writenode"
 )
@ -62,10 +62,10 @@ func InitMaster(cpuprofile *string, wg *sync.WaitGroup) {

 func InitProxy(wg *sync.WaitGroup) {
 	defer wg.Done()
-	//proxynodeimpl.Init()
-	//fmt.Println("ProxyID is", proxynodeimpl.Params.ProxyID())
+	//proxynode.Init()
+	//fmt.Println("ProxyID is", proxynode.Params.ProxyID())
 	ctx, cancel := context.WithCancel(context.Background())
-	svr, err := proxynodeimpl.CreateProxyNodeImpl(ctx)
+	svr, err := proxynode.CreateProxyNodeImpl(ctx)
 	if err != nil {
 		log.Print("create server failed", zap.Error(err))
 	}
@ -220,9 +220,13 @@ func main() {
 	wg.Add(1)
 	go InitMaster(cpuprofile, &wg)
 	time.Sleep(time.Second * 1)
+	wg.Add(1)
 	go InitProxy(&wg)
+	wg.Add(1)
 	go InitQueryNode(&wg)
+	wg.Add(1)
 	go InitIndexBuilder(&wg)
+	wg.Add(1)
 	go InitWriteNode(&wg)
 	wg.Wait()
 }
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@ -51,7 +51,6 @@ proxyNode:
  address: localhost
  port: 19530

-# not used now
 proxyService:
  address: localhost
  port: 19530
--- a/internal/core/src/pb/milvus.pb.cc
+++ b/internal/core/src/pb/milvus.pb.cc
@ -15,6 +15,7 @@
 #include <google/protobuf/wire_format.h>
 // @@protoc_insertion_point(includes)
 #include <google/protobuf/port_def.inc>
+extern PROTOBUF_INTERNAL_EXPORT_common_2eproto ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_Address_common_2eproto;
 extern PROTOBUF_INTERNAL_EXPORT_common_2eproto ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_Blob_common_2eproto;
 extern PROTOBUF_INTERNAL_EXPORT_common_2eproto ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_KeyValuePair_common_2eproto;
 extern PROTOBUF_INTERNAL_EXPORT_common_2eproto ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_MsgBase_common_2eproto;
@ -185,6 +186,10 @@ class FlushRequestDefaultTypeInternal {
 public:
  ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<FlushRequest> _instance;
 } _FlushRequest_default_instance_;
+class RegisterLinkResponseDefaultTypeInternal {
+ public:
+  ::PROTOBUF_NAMESPACE_ID::internal::ExplicitlyConstructed<RegisterLinkResponse> _instance;
+} _RegisterLinkResponse_default_instance_;
 }  // namespace milvus
 }  // namespace proto
 }  // namespace milvus
@ -627,6 +632,22 @@ static void InitDefaultsscc_info_PlaceholderValue_milvus_2eproto() {
 ::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<0> scc_info_PlaceholderValue_milvus_2eproto =
    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 0, InitDefaultsscc_info_PlaceholderValue_milvus_2eproto}, {}};

+static void InitDefaultsscc_info_RegisterLinkResponse_milvus_2eproto() {
+  GOOGLE_PROTOBUF_VERIFY_VERSION;
+
+  {
+    void* ptr = &::milvus::proto::milvus::_RegisterLinkResponse_default_instance_;
+    new (ptr) ::milvus::proto::milvus::RegisterLinkResponse();
+    ::PROTOBUF_NAMESPACE_ID::internal::OnShutdownDestroyMessage(ptr);
+  }
+  ::milvus::proto::milvus::RegisterLinkResponse::InitAsDefaultInstance();
+}
+
+::PROTOBUF_NAMESPACE_ID::internal::SCCInfo<2> scc_info_RegisterLinkResponse_milvus_2eproto =
+    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 2, InitDefaultsscc_info_RegisterLinkResponse_milvus_2eproto}, {
+      &scc_info_Address_common_2eproto.base,
+      &scc_info_Status_common_2eproto.base,}};
+
 static void InitDefaultsscc_info_ReleaseCollectionRequest_milvus_2eproto() {
  GOOGLE_PROTOBUF_VERIFY_VERSION;

@ -792,7 +813,7 @@ static void InitDefaultsscc_info_StringResponse_milvus_2eproto() {
    {{ATOMIC_VAR_INIT(::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase::kUninitialized), 1, InitDefaultsscc_info_StringResponse_milvus_2eproto}, {
      &scc_info_Status_common_2eproto.base,}};

-static ::PROTOBUF_NAMESPACE_ID::Metadata file_level_metadata_milvus_2eproto[40];
+static ::PROTOBUF_NAMESPACE_ID::Metadata file_level_metadata_milvus_2eproto[41];
 static const ::PROTOBUF_NAMESPACE_ID::EnumDescriptor* file_level_enum_descriptors_milvus_2eproto[1];
 static constexpr ::PROTOBUF_NAMESPACE_ID::ServiceDescriptor const** file_level_service_descriptors_milvus_2eproto = nullptr;

@ -1122,6 +1143,13 @@ const ::PROTOBUF_NAMESPACE_ID::uint32 TableStruct_milvus_2eproto::offsets[] PROT
  PROTOBUF_FIELD_OFFSET(::milvus::proto::milvus::FlushRequest, base_),
  PROTOBUF_FIELD_OFFSET(::milvus::proto::milvus::FlushRequest, db_name_),
  PROTOBUF_FIELD_OFFSET(::milvus::proto::milvus::FlushRequest, collection_name_),
+  ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::milvus::proto::milvus::RegisterLinkResponse, _internal_metadata_),
+  ~0u,  // no _extensions_
+  ~0u,  // no _oneof_case_
+  ~0u,  // no _weak_field_map_
+  PROTOBUF_FIELD_OFFSET(::milvus::proto::milvus::RegisterLinkResponse, address_),
+  PROTOBUF_FIELD_OFFSET(::milvus::proto::milvus::RegisterLinkResponse, status_),
 };
 static const ::PROTOBUF_NAMESPACE_ID::internal::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protodesc_cold) = {
  { 0, -1, sizeof(::milvus::proto::milvus::CreateCollectionRequest)},
@ -1164,6 +1192,7 @@ static const ::PROTOBUF_NAMESPACE_ID::internal::MigrationSchema schemas[] PROTOB
  { 302, -1, sizeof(::milvus::proto::milvus::Hits)},
  { 310, -1, sizeof(::milvus::proto::milvus::SearchResults)},
  { 317, -1, sizeof(::milvus::proto::milvus::FlushRequest)},
+  { 325, -1, sizeof(::milvus::proto::milvus::RegisterLinkResponse)},
 };

 static ::PROTOBUF_NAMESPACE_ID::Message const * const file_default_instances[] = {
@ -1207,6 +1236,7 @@ static ::PROTOBUF_NAMESPACE_ID::Message const * const file_default_instances[] =
  reinterpret_cast<const ::PROTOBUF_NAMESPACE_ID::Message*>(&::milvus::proto::milvus::_Hits_default_instance_),
  reinterpret_cast<const ::PROTOBUF_NAMESPACE_ID::Message*>(&::milvus::proto::milvus::_SearchResults_default_instance_),
  reinterpret_cast<const ::PROTOBUF_NAMESPACE_ID::Message*>(&::milvus::proto::milvus::_FlushRequest_default_instance_),
+  reinterpret_cast<const ::PROTOBUF_NAMESPACE_ID::Message*>(&::milvus::proto::milvus::_RegisterLinkResponse_default_instance_),
 };

 const char descriptor_table_protodef_milvus_2eproto[] PROTOBUF_SECTION_VARIABLE(protodesc_cold) =
@ -1328,71 +1358,76 @@ const char descriptor_table_protodef_milvus_2eproto[] PROTOBUF_SECTION_VARIABLE(
  "(\0132\033.milvus.proto.common.Status\022\014\n\004hits\030"
  "\002 \003(\014\"d\n\014FlushRequest\022*\n\004base\030\001 \001(\0132\034.mi"
  "lvus.proto.common.MsgBase\022\017\n\007db_name\030\002 \001"
-  "(\t\022\027\n\017collection_name\030\003 \001(\t*@\n\017Placehold"
-  "erType\022\010\n\004NONE\020\000\022\021\n\rVECTOR_BINARY\020d\022\020\n\014V"
-  "ECTOR_FLOAT\020e2\357\020\n\rMilvusService\022_\n\020Creat"
-  "eCollection\022,.milvus.proto.milvus.Create"
-  "CollectionRequest\032\033.milvus.proto.common."
-  "Status\"\000\022[\n\016DropCollection\022*.milvus.prot"
-  "o.milvus.DropCollectionRequest\032\033.milvus."
-  "proto.common.Status\"\000\022_\n\rHasCollection\022)"
-  ".milvus.proto.milvus.HasCollectionReques"
-  "t\032!.milvus.proto.milvus.BoolResponse\"\000\022["
-  "\n\016LoadCollection\022*.milvus.proto.milvus.L"
-  "oadCollectionRequest\032\033.milvus.proto.comm"
-  "on.Status\"\000\022a\n\021ReleaseCollection\022-.milvu"
-  "s.proto.milvus.ReleaseCollectionRequest\032"
-  "\033.milvus.proto.common.Status\"\000\022w\n\022Descri"
-  "beCollection\022..milvus.proto.milvus.Descr"
-  "ibeCollectionRequest\032/.milvus.proto.milv"
-  "us.DescribeCollectionResponse\"\000\022v\n\027GetCo"
-  "llectionStatistics\022+.milvus.proto.milvus"
-  ".CollectionStatsRequest\032,.milvus.proto.m"
-  "ilvus.CollectionStatsResponse\"\000\022l\n\017ShowC"
-  "ollections\022*.milvus.proto.milvus.ShowCol"
-  "lectionRequest\032+.milvus.proto.milvus.Sho"
-  "wCollectionResponse\"\000\022]\n\017CreatePartition"
-  "\022+.milvus.proto.milvus.CreatePartitionRe"
-  "quest\032\033.milvus.proto.common.Status\"\000\022Y\n\r"
-  "DropPartition\022).milvus.proto.milvus.Drop"
+  "(\t\022\027\n\017collection_name\030\003 \001(\t\"r\n\024RegisterL"
+  "inkResponse\022-\n\007address\030\001 \001(\0132\034.milvus.pr"
+  "oto.common.Address\022+\n\006status\030\002 \001(\0132\033.mil"
+  "vus.proto.common.Status*@\n\017PlaceholderTy"
+  "pe\022\010\n\004NONE\020\000\022\021\n\rVECTOR_BINARY\020d\022\020\n\014VECTO"
+  "R_FLOAT\020e2\357\020\n\rMilvusService\022_\n\020CreateCol"
+  "lection\022,.milvus.proto.milvus.CreateColl"
+  "ectionRequest\032\033.milvus.proto.common.Stat"
+  "us\"\000\022[\n\016DropCollection\022*.milvus.proto.mi"
+  "lvus.DropCollectionRequest\032\033.milvus.prot"
+  "o.common.Status\"\000\022_\n\rHasCollection\022).mil"
+  "vus.proto.milvus.HasCollectionRequest\032!."
+  "milvus.proto.milvus.BoolResponse\"\000\022[\n\016Lo"
+  "adCollection\022*.milvus.proto.milvus.LoadC"
+  "ollectionRequest\032\033.milvus.proto.common.S"
+  "tatus\"\000\022a\n\021ReleaseCollection\022-.milvus.pr"
+  "oto.milvus.ReleaseCollectionRequest\032\033.mi"
+  "lvus.proto.common.Status\"\000\022w\n\022DescribeCo"
+  "llection\022..milvus.proto.milvus.DescribeC"
+  "ollectionRequest\032/.milvus.proto.milvus.D"
+  "escribeCollectionResponse\"\000\022v\n\027GetCollec"
+  "tionStatistics\022+.milvus.proto.milvus.Col"
+  "lectionStatsRequest\032,.milvus.proto.milvu"
+  "s.CollectionStatsResponse\"\000\022l\n\017ShowColle"
+  "ctions\022*.milvus.proto.milvus.ShowCollect"
+  "ionRequest\032+.milvus.proto.milvus.ShowCol"
+  "lectionResponse\"\000\022]\n\017CreatePartition\022+.m"
+  "ilvus.proto.milvus.CreatePartitionReques"
+  "t\032\033.milvus.proto.common.Status\"\000\022Y\n\rDrop"
+  "Partition\022).milvus.proto.milvus.DropPart"
+  "itionRequest\032\033.milvus.proto.common.Statu"
+  "s\"\000\022]\n\014HasPartition\022(.milvus.proto.milvu"
+  "s.HasPartitionRequest\032!.milvus.proto.mil"
+  "vus.BoolResponse\"\000\022Y\n\016LoadPartitions\022(.m"
+  "ilvus.proto.milvus.LoadPartitonRequest\032\033"
+  ".milvus.proto.common.Status\"\000\022`\n\021Release"
+  "Partitions\022,.milvus.proto.milvus.Release"
  "PartitionRequest\032\033.milvus.proto.common.S"
-  "tatus\"\000\022]\n\014HasPartition\022(.milvus.proto.m"
-  "ilvus.HasPartitionRequest\032!.milvus.proto"
-  ".milvus.BoolResponse\"\000\022Y\n\016LoadPartitions"
-  "\022(.milvus.proto.milvus.LoadPartitonReque"
-  "st\032\033.milvus.proto.common.Status\"\000\022`\n\021Rel"
-  "easePartitions\022,.milvus.proto.milvus.Rel"
-  "easePartitionRequest\032\033.milvus.proto.comm"
-  "on.Status\"\000\022s\n\026GetPartitionStatistics\022*."
-  "milvus.proto.milvus.PartitionStatsReques"
-  "t\032+.milvus.proto.milvus.PartitionStatsRe"
-  "sponse\"\000\022i\n\016ShowPartitions\022).milvus.prot"
-  "o.milvus.ShowPartitionRequest\032*.milvus.p"
-  "roto.milvus.ShowPartitionResponse\"\000\022U\n\013C"
-  "reateIndex\022\'.milvus.proto.milvus.CreateI"
-  "ndexRequest\032\033.milvus.proto.common.Status"
-  "\"\000\022h\n\rDescribeIndex\022).milvus.proto.milvu"
-  "s.DescribeIndexRequest\032*.milvus.proto.mi"
-  "lvus.DescribeIndexResponse\"\000\022b\n\rGetIndex"
-  "State\022&.milvus.proto.milvus.IndexStateRe"
-  "quest\032\'.milvus.proto.milvus.IndexStateRe"
-  "sponse\"\000\022S\n\006Insert\022\".milvus.proto.milvus"
-  ".InsertRequest\032#.milvus.proto.milvus.Ins"
-  "ertResponse\"\000\022R\n\006Search\022\".milvus.proto.m"
-  "ilvus.SearchRequest\032\".milvus.proto.milvu"
-  "s.SearchResults\"\000\022I\n\005Flush\022!.milvus.prot"
-  "o.milvus.FlushRequest\032\033.milvus.proto.com"
-  "mon.Status\"\000\022Q\n\014GetDdChannel\022\032.milvus.pr"
-  "oto.common.Empty\032#.milvus.proto.milvus.S"
-  "tringResponse\"\000BBZ@github.com/zilliztech"
-  "/milvus-distributed/internal/proto/milvu"
-  "spbb\006proto3"
+  "tatus\"\000\022s\n\026GetPartitionStatistics\022*.milv"
+  "us.proto.milvus.PartitionStatsRequest\032+."
+  "milvus.proto.milvus.PartitionStatsRespon"
+  "se\"\000\022i\n\016ShowPartitions\022).milvus.proto.mi"
+  "lvus.ShowPartitionRequest\032*.milvus.proto"
+  ".milvus.ShowPartitionResponse\"\000\022U\n\013Creat"
+  "eIndex\022\'.milvus.proto.milvus.CreateIndex"
+  "Request\032\033.milvus.proto.common.Status\"\000\022h"
+  "\n\rDescribeIndex\022).milvus.proto.milvus.De"
+  "scribeIndexRequest\032*.milvus.proto.milvus"
+  ".DescribeIndexResponse\"\000\022b\n\rGetIndexStat"
+  "e\022&.milvus.proto.milvus.IndexStateReques"
+  "t\032\'.milvus.proto.milvus.IndexStateRespon"
+  "se\"\000\022S\n\006Insert\022\".milvus.proto.milvus.Ins"
+  "ertRequest\032#.milvus.proto.milvus.InsertR"
+  "esponse\"\000\022R\n\006Search\022\".milvus.proto.milvu"
+  "s.SearchRequest\032\".milvus.proto.milvus.Se"
+  "archResults\"\000\022I\n\005Flush\022!.milvus.proto.mi"
+  "lvus.FlushRequest\032\033.milvus.proto.common."
+  "Status\"\000\022Q\n\014GetDdChannel\022\032.milvus.proto."
+  "common.Empty\032#.milvus.proto.milvus.Strin"
+  "gResponse\"\0002g\n\014ProxyService\022W\n\014RegisterL"
+  "ink\022\032.milvus.proto.common.Empty\032).milvus"
+  ".proto.milvus.RegisterLinkResponse\"\000BBZ@"
+  "github.com/zilliztech/milvus-distributed"
+  "/internal/proto/milvuspbb\006proto3"
  ;
 static const ::PROTOBUF_NAMESPACE_ID::internal::DescriptorTable*const descriptor_table_milvus_2eproto_deps[2] = {
  &::descriptor_table_common_2eproto,
  &::descriptor_table_schema_2eproto,
 };
-static ::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase*const descriptor_table_milvus_2eproto_sccs[40] = {
+static ::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase*const descriptor_table_milvus_2eproto_sccs[41] = {
  &scc_info_BoolResponse_milvus_2eproto.base,
  &scc_info_CollectionStatsRequest_milvus_2eproto.base,
  &scc_info_CollectionStatsResponse_milvus_2eproto.base,
@ -1422,6 +1457,7 @@ static ::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase*const descriptor_table_mil
  &scc_info_PartitionStatsResponse_milvus_2eproto.base,
  &scc_info_PlaceholderGroup_milvus_2eproto.base,
  &scc_info_PlaceholderValue_milvus_2eproto.base,
+  &scc_info_RegisterLinkResponse_milvus_2eproto.base,
  &scc_info_ReleaseCollectionRequest_milvus_2eproto.base,
  &scc_info_ReleasePartitionRequest_milvus_2eproto.base,
  &scc_info_SearchRequest_milvus_2eproto.base,
@ -1437,10 +1473,10 @@ static ::PROTOBUF_NAMESPACE_ID::internal::SCCInfoBase*const descriptor_table_mil
 static ::PROTOBUF_NAMESPACE_ID::internal::once_flag descriptor_table_milvus_2eproto_once;
 static bool descriptor_table_milvus_2eproto_initialized = false;
 const ::PROTOBUF_NAMESPACE_ID::internal::DescriptorTable descriptor_table_milvus_2eproto = {
-  &descriptor_table_milvus_2eproto_initialized, descriptor_table_protodef_milvus_2eproto, "milvus.proto", 7051,
-  &descriptor_table_milvus_2eproto_once, descriptor_table_milvus_2eproto_sccs, descriptor_table_milvus_2eproto_deps, 40, 2,
+  &descriptor_table_milvus_2eproto_initialized, descriptor_table_protodef_milvus_2eproto, "milvus.proto", 7272,
+  &descriptor_table_milvus_2eproto_once, descriptor_table_milvus_2eproto_sccs, descriptor_table_milvus_2eproto_deps, 41, 2,
  schemas, file_default_instances, TableStruct_milvus_2eproto::offsets,
-  file_level_metadata_milvus_2eproto, 40, file_level_enum_descriptors_milvus_2eproto, file_level_service_descriptors_milvus_2eproto,
+  file_level_metadata_milvus_2eproto, 41, file_level_enum_descriptors_milvus_2eproto, file_level_service_descriptors_milvus_2eproto,
 };

 // Force running AddDescriptors() at dynamic initialization time.
@ -17396,6 +17432,345 @@ void FlushRequest::InternalSwap(FlushRequest* other) {
 }


+// ===================================================================
+
+void RegisterLinkResponse::InitAsDefaultInstance() {
+  ::milvus::proto::milvus::_RegisterLinkResponse_default_instance_._instance.get_mutable()->address_ = const_cast< ::milvus::proto::common::Address*>(
+      ::milvus::proto::common::Address::internal_default_instance());
+  ::milvus::proto::milvus::_RegisterLinkResponse_default_instance_._instance.get_mutable()->status_ = const_cast< ::milvus::proto::common::Status*>(
+      ::milvus::proto::common::Status::internal_default_instance());
+}
+class RegisterLinkResponse::_Internal {
+ public:
+  static const ::milvus::proto::common::Address& address(const RegisterLinkResponse* msg);
+  static const ::milvus::proto::common::Status& status(const RegisterLinkResponse* msg);
+};
+
+const ::milvus::proto::common::Address&
+RegisterLinkResponse::_Internal::address(const RegisterLinkResponse* msg) {
+  return *msg->address_;
+}
+const ::milvus::proto::common::Status&
+RegisterLinkResponse::_Internal::status(const RegisterLinkResponse* msg) {
+  return *msg->status_;
+}
+void RegisterLinkResponse::clear_address() {
+  if (GetArenaNoVirtual() == nullptr && address_ != nullptr) {
+    delete address_;
+  }
+  address_ = nullptr;
+}
+void RegisterLinkResponse::clear_status() {
+  if (GetArenaNoVirtual() == nullptr && status_ != nullptr) {
+    delete status_;
+  }
+  status_ = nullptr;
+}
+RegisterLinkResponse::RegisterLinkResponse()
+  : ::PROTOBUF_NAMESPACE_ID::Message(), _internal_metadata_(nullptr) {
+  SharedCtor();
+  // @@protoc_insertion_point(constructor:milvus.proto.milvus.RegisterLinkResponse)
+}
+RegisterLinkResponse::RegisterLinkResponse(const RegisterLinkResponse& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message(),
+      _internal_metadata_(nullptr) {
+  _internal_metadata_.MergeFrom(from._internal_metadata_);
+  if (from.has_address()) {
+    address_ = new ::milvus::proto::common::Address(*from.address_);
+  } else {
+    address_ = nullptr;
+  }
+  if (from.has_status()) {
+    status_ = new ::milvus::proto::common::Status(*from.status_);
+  } else {
+    status_ = nullptr;
+  }
+  // @@protoc_insertion_point(copy_constructor:milvus.proto.milvus.RegisterLinkResponse)
+}
+
+void RegisterLinkResponse::SharedCtor() {
+  ::PROTOBUF_NAMESPACE_ID::internal::InitSCC(&scc_info_RegisterLinkResponse_milvus_2eproto.base);
+  ::memset(&address_, 0, static_cast<size_t>(
+      reinterpret_cast<char*>(&status_) -
+      reinterpret_cast<char*>(&address_)) + sizeof(status_));
+}
+
+RegisterLinkResponse::~RegisterLinkResponse() {
+  // @@protoc_insertion_point(destructor:milvus.proto.milvus.RegisterLinkResponse)
+  SharedDtor();
+}
+
+void RegisterLinkResponse::SharedDtor() {
+  if (this != internal_default_instance()) delete address_;
+  if (this != internal_default_instance()) delete status_;
+}
+
+void RegisterLinkResponse::SetCachedSize(int size) const {
+  _cached_size_.Set(size);
+}
+const RegisterLinkResponse& RegisterLinkResponse::default_instance() {
+  ::PROTOBUF_NAMESPACE_ID::internal::InitSCC(&::scc_info_RegisterLinkResponse_milvus_2eproto.base);
+  return *internal_default_instance();
+}
+
+
+void RegisterLinkResponse::Clear() {
+// @@protoc_insertion_point(message_clear_start:milvus.proto.milvus.RegisterLinkResponse)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  if (GetArenaNoVirtual() == nullptr && address_ != nullptr) {
+    delete address_;
+  }
+  address_ = nullptr;
+  if (GetArenaNoVirtual() == nullptr && status_ != nullptr) {
+    delete status_;
+  }
+  status_ = nullptr;
+  _internal_metadata_.Clear();
+}
+
+#if GOOGLE_PROTOBUF_ENABLE_EXPERIMENTAL_PARSER
+const char* RegisterLinkResponse::_InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) {
+#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failure
+  while (!ctx->Done(&ptr)) {
+    ::PROTOBUF_NAMESPACE_ID::uint32 tag;
+    ptr = ::PROTOBUF_NAMESPACE_ID::internal::ReadTag(ptr, &tag);
+    CHK_(ptr);
+    switch (tag >> 3) {
+      // .milvus.proto.common.Address address = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 10)) {
+          ptr = ctx->ParseMessage(mutable_address(), ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      // .milvus.proto.common.Status status = 2;
+      case 2:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<::PROTOBUF_NAMESPACE_ID::uint8>(tag) == 18)) {
+          ptr = ctx->ParseMessage(mutable_status(), ptr);
+          CHK_(ptr);
+        } else goto handle_unusual;
+        continue;
+      default: {
+      handle_unusual:
+        if ((tag & 7) == 4 || tag == 0) {
+          ctx->SetLastTag(tag);
+          goto success;
+        }
+        ptr = UnknownFieldParse(tag, &_internal_metadata_, ptr, ctx);
+        CHK_(ptr != nullptr);
+        continue;
+      }
+    }  // switch
+  }  // while
+success:
+  return ptr;
+failure:
+  ptr = nullptr;
+  goto success;
+#undef CHK_
+}
+#else  // GOOGLE_PROTOBUF_ENABLE_EXPERIMENTAL_PARSER
+bool RegisterLinkResponse::MergePartialFromCodedStream(
+    ::PROTOBUF_NAMESPACE_ID::io::CodedInputStream* input) {
+#define DO_(EXPRESSION) if (!PROTOBUF_PREDICT_TRUE(EXPRESSION)) goto failure
+  ::PROTOBUF_NAMESPACE_ID::uint32 tag;
+  // @@protoc_insertion_point(parse_start:milvus.proto.milvus.RegisterLinkResponse)
+  for (;;) {
+    ::std::pair<::PROTOBUF_NAMESPACE_ID::uint32, bool> p = input->ReadTagWithCutoffNoLastTag(127u);
+    tag = p.first;
+    if (!p.second) goto handle_unusual;
+    switch (::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::GetTagFieldNumber(tag)) {
+      // .milvus.proto.common.Address address = 1;
+      case 1: {
+        if (static_cast< ::PROTOBUF_NAMESPACE_ID::uint8>(tag) == (10 & 0xFF)) {
+          DO_(::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::ReadMessage(
+               input, mutable_address()));
+        } else {
+          goto handle_unusual;
+        }
+        break;
+      }
+
+      // .milvus.proto.common.Status status = 2;
+      case 2: {
+        if (static_cast< ::PROTOBUF_NAMESPACE_ID::uint8>(tag) == (18 & 0xFF)) {
+          DO_(::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::ReadMessage(
+               input, mutable_status()));
+        } else {
+          goto handle_unusual;
+        }
+        break;
+      }
+
+      default: {
+      handle_unusual:
+        if (tag == 0) {
+          goto success;
+        }
+        DO_(::PROTOBUF_NAMESPACE_ID::internal::WireFormat::SkipField(
+              input, tag, _internal_metadata_.mutable_unknown_fields()));
+        break;
+      }
+    }
+  }
+success:
+  // @@protoc_insertion_point(parse_success:milvus.proto.milvus.RegisterLinkResponse)
+  return true;
+failure:
+  // @@protoc_insertion_point(parse_failure:milvus.proto.milvus.RegisterLinkResponse)
+  return false;
+#undef DO_
+}
+#endif  // GOOGLE_PROTOBUF_ENABLE_EXPERIMENTAL_PARSER
+
+void RegisterLinkResponse::SerializeWithCachedSizes(
+    ::PROTOBUF_NAMESPACE_ID::io::CodedOutputStream* output) const {
+  // @@protoc_insertion_point(serialize_start:milvus.proto.milvus.RegisterLinkResponse)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .milvus.proto.common.Address address = 1;
+  if (this->has_address()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteMessageMaybeToArray(
+      1, _Internal::address(this), output);
+  }
+
+  // .milvus.proto.common.Status status = 2;
+  if (this->has_status()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::WriteMessageMaybeToArray(
+      2, _Internal::status(this), output);
+  }
+
+  if (_internal_metadata_.have_unknown_fields()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormat::SerializeUnknownFields(
+        _internal_metadata_.unknown_fields(), output);
+  }
+  // @@protoc_insertion_point(serialize_end:milvus.proto.milvus.RegisterLinkResponse)
+}
+
+::PROTOBUF_NAMESPACE_ID::uint8* RegisterLinkResponse::InternalSerializeWithCachedSizesToArray(
+    ::PROTOBUF_NAMESPACE_ID::uint8* target) const {
+  // @@protoc_insertion_point(serialize_to_array_start:milvus.proto.milvus.RegisterLinkResponse)
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .milvus.proto.common.Address address = 1;
+  if (this->has_address()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessageToArray(
+        1, _Internal::address(this), target);
+  }
+
+  // .milvus.proto.common.Status status = 2;
+  if (this->has_status()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessageToArray(
+        2, _Internal::status(this), target);
+  }
+
+  if (_internal_metadata_.have_unknown_fields()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormat::SerializeUnknownFieldsToArray(
+        _internal_metadata_.unknown_fields(), target);
+  }
+  // @@protoc_insertion_point(serialize_to_array_end:milvus.proto.milvus.RegisterLinkResponse)
+  return target;
+}
+
+size_t RegisterLinkResponse::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:milvus.proto.milvus.RegisterLinkResponse)
+  size_t total_size = 0;
+
+  if (_internal_metadata_.have_unknown_fields()) {
+    total_size +=
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormat::ComputeUnknownFieldsSize(
+        _internal_metadata_.unknown_fields());
+  }
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // .milvus.proto.common.Address address = 1;
+  if (this->has_address()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *address_);
+  }
+
+  // .milvus.proto.common.Status status = 2;
+  if (this->has_status()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *status_);
+  }
+
+  int cached_size = ::PROTOBUF_NAMESPACE_ID::internal::ToCachedSize(total_size);
+  SetCachedSize(cached_size);
+  return total_size;
+}
+
+void RegisterLinkResponse::MergeFrom(const ::PROTOBUF_NAMESPACE_ID::Message& from) {
+// @@protoc_insertion_point(generalized_merge_from_start:milvus.proto.milvus.RegisterLinkResponse)
+  GOOGLE_DCHECK_NE(&from, this);
+  const RegisterLinkResponse* source =
+      ::PROTOBUF_NAMESPACE_ID::DynamicCastToGenerated<RegisterLinkResponse>(
+          &from);
+  if (source == nullptr) {
+  // @@protoc_insertion_point(generalized_merge_from_cast_fail:milvus.proto.milvus.RegisterLinkResponse)
+    ::PROTOBUF_NAMESPACE_ID::internal::ReflectionOps::Merge(from, this);
+  } else {
+  // @@protoc_insertion_point(generalized_merge_from_cast_success:milvus.proto.milvus.RegisterLinkResponse)
+    MergeFrom(*source);
+  }
+}
+
+void RegisterLinkResponse::MergeFrom(const RegisterLinkResponse& from) {
+// @@protoc_insertion_point(class_specific_merge_from_start:milvus.proto.milvus.RegisterLinkResponse)
+  GOOGLE_DCHECK_NE(&from, this);
+  _internal_metadata_.MergeFrom(from._internal_metadata_);
+  ::PROTOBUF_NAMESPACE_ID::uint32 cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (from.has_address()) {
+    mutable_address()->::milvus::proto::common::Address::MergeFrom(from.address());
+  }
+  if (from.has_status()) {
+    mutable_status()->::milvus::proto::common::Status::MergeFrom(from.status());
+  }
+}
+
+void RegisterLinkResponse::CopyFrom(const ::PROTOBUF_NAMESPACE_ID::Message& from) {
+// @@protoc_insertion_point(generalized_copy_from_start:milvus.proto.milvus.RegisterLinkResponse)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+void RegisterLinkResponse::CopyFrom(const RegisterLinkResponse& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:milvus.proto.milvus.RegisterLinkResponse)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool RegisterLinkResponse::IsInitialized() const {
+  return true;
+}
+
+void RegisterLinkResponse::InternalSwap(RegisterLinkResponse* other) {
+  using std::swap;
+  _internal_metadata_.Swap(&other->_internal_metadata_);
+  swap(address_, other->address_);
+  swap(status_, other->status_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata RegisterLinkResponse::GetMetadata() const {
+  return GetMetadataStatic();
+}
+
+
 // @@protoc_insertion_point(namespace_scope)
 }  // namespace milvus
 }  // namespace proto
@ -17521,6 +17896,9 @@ template<> PROTOBUF_NOINLINE ::milvus::proto::milvus::SearchResults* Arena::Crea
 template<> PROTOBUF_NOINLINE ::milvus::proto::milvus::FlushRequest* Arena::CreateMaybeMessage< ::milvus::proto::milvus::FlushRequest >(Arena* arena) {
  return Arena::CreateInternal< ::milvus::proto::milvus::FlushRequest >(arena);
 }
+template<> PROTOBUF_NOINLINE ::milvus::proto::milvus::RegisterLinkResponse* Arena::CreateMaybeMessage< ::milvus::proto::milvus::RegisterLinkResponse >(Arena* arena) {
+  return Arena::CreateInternal< ::milvus::proto::milvus::RegisterLinkResponse >(arena);
+}
 PROTOBUF_NAMESPACE_CLOSE

 // @@protoc_insertion_point(global_scope)
--- a/internal/core/src/pb/milvus.pb.h
+++ b/internal/core/src/pb/milvus.pb.h
@ -50,7 +50,7 @@ struct TableStruct_milvus_2eproto {
    PROTOBUF_SECTION_VARIABLE(protodesc_cold);
  static const ::PROTOBUF_NAMESPACE_ID::internal::AuxillaryParseTableField aux[]
    PROTOBUF_SECTION_VARIABLE(protodesc_cold);
-  static const ::PROTOBUF_NAMESPACE_ID::internal::ParseTable schema[40]
+  static const ::PROTOBUF_NAMESPACE_ID::internal::ParseTable schema[41]
    PROTOBUF_SECTION_VARIABLE(protodesc_cold);
  static const ::PROTOBUF_NAMESPACE_ID::internal::FieldMetadata field_metadata[];
  static const ::PROTOBUF_NAMESPACE_ID::internal::SerializationTable serialization_table[];
@ -147,6 +147,9 @@ extern PlaceholderGroupDefaultTypeInternal _PlaceholderGroup_default_instance_;
 class PlaceholderValue;
 class PlaceholderValueDefaultTypeInternal;
 extern PlaceholderValueDefaultTypeInternal _PlaceholderValue_default_instance_;
+class RegisterLinkResponse;
+class RegisterLinkResponseDefaultTypeInternal;
+extern RegisterLinkResponseDefaultTypeInternal _RegisterLinkResponse_default_instance_;
 class ReleaseCollectionRequest;
 class ReleaseCollectionRequestDefaultTypeInternal;
 extern ReleaseCollectionRequestDefaultTypeInternal _ReleaseCollectionRequest_default_instance_;
@ -213,6 +216,7 @@ template<> ::milvus::proto::milvus::PartitionStatsRequest* Arena::CreateMaybeMes
 template<> ::milvus::proto::milvus::PartitionStatsResponse* Arena::CreateMaybeMessage<::milvus::proto::milvus::PartitionStatsResponse>(Arena*);
 template<> ::milvus::proto::milvus::PlaceholderGroup* Arena::CreateMaybeMessage<::milvus::proto::milvus::PlaceholderGroup>(Arena*);
 template<> ::milvus::proto::milvus::PlaceholderValue* Arena::CreateMaybeMessage<::milvus::proto::milvus::PlaceholderValue>(Arena*);
+template<> ::milvus::proto::milvus::RegisterLinkResponse* Arena::CreateMaybeMessage<::milvus::proto::milvus::RegisterLinkResponse>(Arena*);
 template<> ::milvus::proto::milvus::ReleaseCollectionRequest* Arena::CreateMaybeMessage<::milvus::proto::milvus::ReleaseCollectionRequest>(Arena*);
 template<> ::milvus::proto::milvus::ReleasePartitionRequest* Arena::CreateMaybeMessage<::milvus::proto::milvus::ReleasePartitionRequest>(Arena*);
 template<> ::milvus::proto::milvus::SearchRequest* Arena::CreateMaybeMessage<::milvus::proto::milvus::SearchRequest>(Arena*);
@ -6716,6 +6720,150 @@ class FlushRequest :
  mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
  friend struct ::TableStruct_milvus_2eproto;
 };
+// -------------------------------------------------------------------
+
+class RegisterLinkResponse :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:milvus.proto.milvus.RegisterLinkResponse) */ {
+ public:
+  RegisterLinkResponse();
+  virtual ~RegisterLinkResponse();
+
+  RegisterLinkResponse(const RegisterLinkResponse& from);
+  RegisterLinkResponse(RegisterLinkResponse&& from) noexcept
+    : RegisterLinkResponse() {
+    *this = ::std::move(from);
+  }
+
+  inline RegisterLinkResponse& operator=(const RegisterLinkResponse& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline RegisterLinkResponse& operator=(RegisterLinkResponse&& from) noexcept {
+    if (GetArenaNoVirtual() == from.GetArenaNoVirtual()) {
+      if (this != &from) InternalSwap(&from);
+    } else {
+      CopyFrom(from);
+    }
+    return *this;
+  }
+
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* descriptor() {
+    return GetDescriptor();
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* GetDescriptor() {
+    return GetMetadataStatic().descriptor;
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Reflection* GetReflection() {
+    return GetMetadataStatic().reflection;
+  }
+  static const RegisterLinkResponse& default_instance();
+
+  static void InitAsDefaultInstance();  // FOR INTERNAL USE ONLY
+  static inline const RegisterLinkResponse* internal_default_instance() {
+    return reinterpret_cast<const RegisterLinkResponse*>(
+               &_RegisterLinkResponse_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    40;
+
+  friend void swap(RegisterLinkResponse& a, RegisterLinkResponse& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(RegisterLinkResponse* other) {
+    if (other == this) return;
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  inline RegisterLinkResponse* New() const final {
+    return CreateMaybeMessage<RegisterLinkResponse>(nullptr);
+  }
+
+  RegisterLinkResponse* New(::PROTOBUF_NAMESPACE_ID::Arena* arena) const final {
+    return CreateMaybeMessage<RegisterLinkResponse>(arena);
+  }
+  void CopyFrom(const ::PROTOBUF_NAMESPACE_ID::Message& from) final;
+  void MergeFrom(const ::PROTOBUF_NAMESPACE_ID::Message& from) final;
+  void CopyFrom(const RegisterLinkResponse& from);
+  void MergeFrom(const RegisterLinkResponse& from);
+  PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;
+  bool IsInitialized() const final;
+
+  size_t ByteSizeLong() const final;
+  #if GOOGLE_PROTOBUF_ENABLE_EXPERIMENTAL_PARSER
+  const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;
+  #else
+  bool MergePartialFromCodedStream(
+      ::PROTOBUF_NAMESPACE_ID::io::CodedInputStream* input) final;
+  #endif  // GOOGLE_PROTOBUF_ENABLE_EXPERIMENTAL_PARSER
+  void SerializeWithCachedSizes(
+      ::PROTOBUF_NAMESPACE_ID::io::CodedOutputStream* output) const final;
+  ::PROTOBUF_NAMESPACE_ID::uint8* InternalSerializeWithCachedSizesToArray(
+      ::PROTOBUF_NAMESPACE_ID::uint8* target) const final;
+  int GetCachedSize() const final { return _cached_size_.Get(); }
+
+  private:
+  inline void SharedCtor();
+  inline void SharedDtor();
+  void SetCachedSize(int size) const final;
+  void InternalSwap(RegisterLinkResponse* other);
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "milvus.proto.milvus.RegisterLinkResponse";
+  }
+  private:
+  inline ::PROTOBUF_NAMESPACE_ID::Arena* GetArenaNoVirtual() const {
+    return nullptr;
+  }
+  inline void* MaybeArenaPtr() const {
+    return nullptr;
+  }
+  public:
+
+  ::PROTOBUF_NAMESPACE_ID::Metadata GetMetadata() const final;
+  private:
+  static ::PROTOBUF_NAMESPACE_ID::Metadata GetMetadataStatic() {
+    ::PROTOBUF_NAMESPACE_ID::internal::AssignDescriptors(&::descriptor_table_milvus_2eproto);
+    return ::descriptor_table_milvus_2eproto.file_level_metadata[kIndexInFileMessages];
+  }
+
+  public:
+
+  // nested types ----------------------------------------------------
+
+  // accessors -------------------------------------------------------
+
+  enum : int {
+    kAddressFieldNumber = 1,
+    kStatusFieldNumber = 2,
+  };
+  // .milvus.proto.common.Address address = 1;
+  bool has_address() const;
+  void clear_address();
+  const ::milvus::proto::common::Address& address() const;
+  ::milvus::proto::common::Address* release_address();
+  ::milvus::proto::common::Address* mutable_address();
+  void set_allocated_address(::milvus::proto::common::Address* address);
+
+  // .milvus.proto.common.Status status = 2;
+  bool has_status() const;
+  void clear_status();
+  const ::milvus::proto::common::Status& status() const;
+  ::milvus::proto::common::Status* release_status();
+  ::milvus::proto::common::Status* mutable_status();
+  void set_allocated_status(::milvus::proto::common::Status* status);
+
+  // @@protoc_insertion_point(class_scope:milvus.proto.milvus.RegisterLinkResponse)
+ private:
+  class _Internal;
+
+  ::PROTOBUF_NAMESPACE_ID::internal::InternalMetadataWithArena _internal_metadata_;
+  ::milvus::proto::common::Address* address_;
+  ::milvus::proto::common::Status* status_;
+  mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  friend struct ::TableStruct_milvus_2eproto;
+};
 // ===================================================================


@ -12474,6 +12622,100 @@ inline void FlushRequest::set_allocated_collection_name(std::string* collection_
  // @@protoc_insertion_point(field_set_allocated:milvus.proto.milvus.FlushRequest.collection_name)
 }

+// -------------------------------------------------------------------
+
+// RegisterLinkResponse
+
+// .milvus.proto.common.Address address = 1;
+inline bool RegisterLinkResponse::has_address() const {
+  return this != internal_default_instance() && address_ != nullptr;
+}
+inline const ::milvus::proto::common::Address& RegisterLinkResponse::address() const {
+  const ::milvus::proto::common::Address* p = address_;
+  // @@protoc_insertion_point(field_get:milvus.proto.milvus.RegisterLinkResponse.address)
+  return p != nullptr ? *p : *reinterpret_cast<const ::milvus::proto::common::Address*>(
+      &::milvus::proto::common::_Address_default_instance_);
+}
+inline ::milvus::proto::common::Address* RegisterLinkResponse::release_address() {
+  // @@protoc_insertion_point(field_release:milvus.proto.milvus.RegisterLinkResponse.address)
+  
+  ::milvus::proto::common::Address* temp = address_;
+  address_ = nullptr;
+  return temp;
+}
+inline ::milvus::proto::common::Address* RegisterLinkResponse::mutable_address() {
+  
+  if (address_ == nullptr) {
+    auto* p = CreateMaybeMessage<::milvus::proto::common::Address>(GetArenaNoVirtual());
+    address_ = p;
+  }
+  // @@protoc_insertion_point(field_mutable:milvus.proto.milvus.RegisterLinkResponse.address)
+  return address_;
+}
+inline void RegisterLinkResponse::set_allocated_address(::milvus::proto::common::Address* address) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaNoVirtual();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(address_);
+  }
+  if (address) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena = nullptr;
+    if (message_arena != submessage_arena) {
+      address = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, address, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  address_ = address;
+  // @@protoc_insertion_point(field_set_allocated:milvus.proto.milvus.RegisterLinkResponse.address)
+}
+
+// .milvus.proto.common.Status status = 2;
+inline bool RegisterLinkResponse::has_status() const {
+  return this != internal_default_instance() && status_ != nullptr;
+}
+inline const ::milvus::proto::common::Status& RegisterLinkResponse::status() const {
+  const ::milvus::proto::common::Status* p = status_;
+  // @@protoc_insertion_point(field_get:milvus.proto.milvus.RegisterLinkResponse.status)
+  return p != nullptr ? *p : *reinterpret_cast<const ::milvus::proto::common::Status*>(
+      &::milvus::proto::common::_Status_default_instance_);
+}
+inline ::milvus::proto::common::Status* RegisterLinkResponse::release_status() {
+  // @@protoc_insertion_point(field_release:milvus.proto.milvus.RegisterLinkResponse.status)
+  
+  ::milvus::proto::common::Status* temp = status_;
+  status_ = nullptr;
+  return temp;
+}
+inline ::milvus::proto::common::Status* RegisterLinkResponse::mutable_status() {
+  
+  if (status_ == nullptr) {
+    auto* p = CreateMaybeMessage<::milvus::proto::common::Status>(GetArenaNoVirtual());
+    status_ = p;
+  }
+  // @@protoc_insertion_point(field_mutable:milvus.proto.milvus.RegisterLinkResponse.status)
+  return status_;
+}
+inline void RegisterLinkResponse::set_allocated_status(::milvus::proto::common::Status* status) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaNoVirtual();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(status_);
+  }
+  if (status) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena = nullptr;
+    if (message_arena != submessage_arena) {
+      status = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, status, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  status_ = status;
+  // @@protoc_insertion_point(field_set_allocated:milvus.proto.milvus.RegisterLinkResponse.status)
+}
+
 #ifdef __GNUC__
  #pragma GCC diagnostic pop
 #endif  // __GNUC__
@ -12555,6 +12797,8 @@ inline void FlushRequest::set_allocated_collection_name(std::string* collection_

 // -------------------------------------------------------------------

+// -------------------------------------------------------------------
+

 // @@protoc_insertion_point(namespace_scope)

--- a/internal/distributed/proxynode/service.go
+++ b/internal/distributed/proxynode/service.go
@ -3,13 +3,18 @@ package grpcproxynode
 import (
 	"context"
 	"net"
+	"os"
 	"strconv"
 	"sync"

+	"github.com/go-basic/ipv4"
+
+	grpcproxyservice "github.com/zilliztech/milvus-distributed/internal/distributed/proxyservice"
+
 	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
 	"github.com/zilliztech/milvus-distributed/internal/proto/milvuspb"

-	proxynodeimpl "github.com/zilliztech/milvus-distributed/internal/proxynode"
+	"github.com/zilliztech/milvus-distributed/internal/proxynode"

 	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"

@ -19,12 +24,12 @@ import (
 type Server struct {
 	ctx                 context.Context
 	wg                  sync.WaitGroup
-	impl                proxynodeimpl.ProxyNode
+	impl                proxynode.ProxyNode
 	grpcServer          *grpc.Server
 	ip                  string
 	port                int
 	proxyServiceAddress string
-	//proxyServiceClient  *proxyservice.Client
+	proxyServiceClient  *grpcproxyservice.Client
 }

 func CreateProxyNodeServer() (*Server, error) {
@ -32,51 +37,56 @@ func CreateProxyNodeServer() (*Server, error) {
 }

 func (s *Server) connectProxyService() error {
-	proxynodeimpl.Params.Init()
+	proxynode.Params.Init()

-	//s.proxyServiceAddress = proxynodeimpl.Params.ProxyServiceAddress()
-	//s.proxyServiceClient = proxyservice.NewClient(s.ctx, s.proxyServiceAddress)
-	//
-	//getAvailablePort := func() int {
-	//	listener, err := net.Listen("tcp", ":0")
-	//	if err != nil {
-	//		panic(err)
-	//	}
-	//	defer listener.Close()
-	//
-	//	return listener.Addr().(*net.TCPAddr).Port
-	//}
-	//getLocalIp := func() string {
-	//	return ipv4.LocalIP()
-	//}
-	//s.ip = getLocalIp()
-	//s.port = getAvailablePort()
-	//
-	//request := &proxypb.RegisterNodeRequest{
-	//	Address: &commonpb.Address{
-	//		Ip:   s.ip,
-	//		Port: int64(s.port),
-	//	},
-	//}
-	//response, err := s.proxyServiceClient.RegisterNode(request)
-	//if err != nil {
-	//	panic(err)
-	//}
-	//
-	//proxynodeimpl.Params.Save("_proxyID", strconv.Itoa(int(response.InitParams.NodeID)))
-	//
-	//for _, params := range response.InitParams.StartParams {
-	//	proxynodeimpl.Params.Save(params.Key, params.Value)
-	//}
-	//
-	//return err
-	return nil
+	s.proxyServiceAddress = proxynode.Params.ProxyServiceAddress()
+	s.proxyServiceClient = grpcproxyservice.NewClient(s.ctx, s.proxyServiceAddress)
+
+	getAvailablePort := func() int {
+		listener, err := net.Listen("tcp", ":0")
+		if err != nil {
+			panic(err)
+		}
+		defer listener.Close()
+
+		return listener.Addr().(*net.TCPAddr).Port
+	}
+	getLocalIP := func() string {
+		localIP := ipv4.LocalIP()
+		host := os.Getenv("PROXY_NODE_HOST")
+		// TODO: shall we write this to ParamTable?
+		if len(host) <= 0 {
+			return localIP
+		}
+		return host
+	}
+	s.ip = getLocalIP()
+	s.port = getAvailablePort()
+
+	request := &proxypb.RegisterNodeRequest{
+		Address: &commonpb.Address{
+			Ip:   s.ip,
+			Port: int64(s.port),
+		},
+	}
+	response, err := s.proxyServiceClient.RegisterNode(request)
+	if err != nil {
+		panic(err)
+	}
+
+	proxynode.Params.Save("_proxyID", strconv.Itoa(int(response.InitParams.NodeID)))
+
+	for _, params := range response.InitParams.StartParams {
+		proxynode.Params.Save(params.Key, params.Value)
+	}
+
+	return err
 }

 func (s *Server) Init() error {
 	s.ctx = context.Background()
 	var err error
-	s.impl, err = proxynodeimpl.CreateProxyNodeImpl(s.ctx)
+	s.impl, err = proxynode.CreateProxyNodeImpl(s.ctx)
 	if err != nil {
 		return err
 	}
@ -93,7 +103,7 @@ func (s *Server) Start() error {
 		defer s.wg.Done()

 		// TODO: use config
-		lis, err := net.Listen("tcp", ":"+strconv.Itoa(proxynodeimpl.Params.NetworkPort()))
+		lis, err := net.Listen("tcp", ":"+strconv.Itoa(s.port))
 		if err != nil {
 			panic(err)
 		}
--- a/internal/distributed/proxyservice/client.go
+++ b/internal/distributed/proxyservice/client.go
@ -0,0 +1,52 @@
+package grpcproxyservice
+
+import (
+	"context"
+
+	"google.golang.org/grpc"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+)
+
+type Client struct {
+	proxyServiceClient proxypb.ProxyServiceClient
+	address            string
+	ctx                context.Context
+}
+
+func (c *Client) tryConnect() error {
+	if c.proxyServiceClient != nil {
+		return nil
+	}
+	conn, err := grpc.DialContext(c.ctx, c.address, grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		return err
+	}
+	c.proxyServiceClient = proxypb.NewProxyServiceClient(conn)
+	return nil
+}
+
+func (c *Client) RegisterNode(request *proxypb.RegisterNodeRequest) (*proxypb.RegisterNodeResponse, error) {
+	err := c.tryConnect()
+	if err != nil {
+		return nil, err
+	}
+	return c.proxyServiceClient.RegisterNode(c.ctx, request)
+}
+
+func (c *Client) InvalidateCollectionMetaCache(request *proxypb.InvalidateCollMetaCacheRequest) error {
+	var err error
+	err = c.tryConnect()
+	if err != nil {
+		return err
+	}
+	_, err = c.proxyServiceClient.InvalidateCollectionMetaCache(c.ctx, request)
+	return err
+}
+
+func NewClient(ctx context.Context, address string) *Client {
+	return &Client{
+		address: address,
+		ctx:     ctx,
+	}
+}
--- a/internal/distributed/proxyservice/paramtable.go
+++ b/internal/distributed/proxyservice/paramtable.go
@ -0,0 +1,46 @@
+package grpcproxyservice
+
+import (
+	"net"
+	"strconv"
+
+	"github.com/zilliztech/milvus-distributed/internal/util/paramtable"
+)
+
+type ParamTable struct {
+	paramtable.BaseTable
+}
+
+var Params ParamTable
+
+func (pt *ParamTable) Init() {
+	pt.BaseTable.Init()
+}
+
+func (pt *ParamTable) NetworkPort() int {
+	return pt.ParseInt("proxyService.port")
+}
+
+func (pt *ParamTable) NetworkAddress() string {
+	addr, err := pt.Load("proxyService.address")
+	if err != nil {
+		panic(err)
+	}
+
+	hostName, _ := net.LookupHost(addr)
+	if len(hostName) <= 0 {
+		if ip := net.ParseIP(addr); ip == nil {
+			panic("invalid ip proxyService.address")
+		}
+	}
+
+	port, err := pt.Load("proxyService.port")
+	if err != nil {
+		panic(err)
+	}
+	_, err = strconv.Atoi(port)
+	if err != nil {
+		panic(err)
+	}
+	return addr + ":" + port
+}
--- a/internal/distributed/proxyservice/service.go
+++ b/internal/distributed/proxyservice/service.go
@ -0,0 +1,84 @@
+package grpcproxyservice
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"strconv"
+	"sync"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/milvuspb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proxyservice"
+	"google.golang.org/grpc"
+)
+
+type Server struct {
+	ctx        context.Context
+	wg         sync.WaitGroup
+	impl       proxyservice.ProxyService
+	grpcServer *grpc.Server
+}
+
+func CreateProxyServiceServer() (*Server, error) {
+	return &Server{}, nil
+}
+
+func (s *Server) Init() error {
+	s.ctx = context.Background()
+	Params.Init()
+	s.impl, _ = proxyservice.CreateProxyService(s.ctx)
+	s.impl.Init()
+	return nil
+}
+
+func (s *Server) Start() error {
+	fmt.Println("proxy service start ...")
+	s.wg.Add(1)
+	go func() {
+		defer s.wg.Done()
+
+		// TODO: use config
+		fmt.Println("network port: ", Params.NetworkPort())
+		lis, err := net.Listen("tcp", ":"+strconv.Itoa(Params.NetworkPort()))
+		if err != nil {
+			panic(err)
+		}
+
+		s.grpcServer = grpc.NewServer()
+		proxypb.RegisterProxyServiceServer(s.grpcServer, s)
+		milvuspb.RegisterProxyServiceServer(s.grpcServer, s)
+		if err = s.grpcServer.Serve(lis); err != nil {
+			panic(err)
+		}
+	}()
+
+	s.impl.Start()
+
+	return nil
+}
+
+func (s *Server) Stop() error {
+	s.impl.Stop()
+	if s.grpcServer != nil {
+		s.grpcServer.GracefulStop()
+	}
+	s.wg.Wait()
+	return nil
+}
+
+func (s *Server) RegisterLink(ctx context.Context, empty *commonpb.Empty) (*milvuspb.RegisterLinkResponse, error) {
+	return s.impl.RegisterLink()
+}
+
+func (s *Server) RegisterNode(ctx context.Context, request *proxypb.RegisterNodeRequest) (*proxypb.RegisterNodeResponse, error) {
+	return s.impl.RegisterNode(request)
+}
+
+func (s *Server) InvalidateCollectionMetaCache(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
+	return &commonpb.Status{}, s.impl.InvalidateCollectionMetaCache(request)
+}
--- a/internal/proto/milvus.proto
+++ b/internal/proto/milvus.proto
@ -292,3 +292,12 @@ service MilvusService {

  rpc GetDdChannel(common.Empty) returns (StringResponse) {}
 }
+
+message RegisterLinkResponse {
+  common.Address address = 1;
+  common.Status status = 2;
+}
+
+service ProxyService {
+  rpc RegisterLink(common.Empty) returns (RegisterLinkResponse) {}
+}
--- a/internal/proto/milvuspb/milvus.pb.go
+++ b/internal/proto/milvuspb/milvus.pb.go
@ -2297,6 +2297,53 @@ func (m *FlushRequest) GetCollectionName() string {
 	return ""
 }

+type RegisterLinkResponse struct {
+	Address              *commonpb.Address `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
+	Status               *commonpb.Status  `protobuf:"bytes,2,opt,name=status,proto3" json:"status,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *RegisterLinkResponse) Reset()         { *m = RegisterLinkResponse{} }
+func (m *RegisterLinkResponse) String() string { return proto.CompactTextString(m) }
+func (*RegisterLinkResponse) ProtoMessage()    {}
+func (*RegisterLinkResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_02345ba45cc0e303, []int{40}
+}
+
+func (m *RegisterLinkResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RegisterLinkResponse.Unmarshal(m, b)
+}
+func (m *RegisterLinkResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RegisterLinkResponse.Marshal(b, m, deterministic)
+}
+func (m *RegisterLinkResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RegisterLinkResponse.Merge(m, src)
+}
+func (m *RegisterLinkResponse) XXX_Size() int {
+	return xxx_messageInfo_RegisterLinkResponse.Size(m)
+}
+func (m *RegisterLinkResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_RegisterLinkResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RegisterLinkResponse proto.InternalMessageInfo
+
+func (m *RegisterLinkResponse) GetAddress() *commonpb.Address {
+	if m != nil {
+		return m.Address
+	}
+	return nil
+}
+
+func (m *RegisterLinkResponse) GetStatus() *commonpb.Status {
+	if m != nil {
+		return m.Status
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterEnum("milvus.proto.milvus.PlaceholderType", PlaceholderType_name, PlaceholderType_value)
 	proto.RegisterType((*CreateCollectionRequest)(nil), "milvus.proto.milvus.CreateCollectionRequest")
@ -2339,112 +2386,117 @@ func init() {
 	proto.RegisterType((*Hits)(nil), "milvus.proto.milvus.Hits")
 	proto.RegisterType((*SearchResults)(nil), "milvus.proto.milvus.SearchResults")
 	proto.RegisterType((*FlushRequest)(nil), "milvus.proto.milvus.FlushRequest")
+	proto.RegisterType((*RegisterLinkResponse)(nil), "milvus.proto.milvus.RegisterLinkResponse")
 }

 func init() { proto.RegisterFile("milvus.proto", fileDescriptor_02345ba45cc0e303) }

 var fileDescriptor_02345ba45cc0e303 = []byte{
-	// 1591 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xd4, 0x59, 0xdd, 0x6e, 0x1b, 0x45,
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-	0x8e, 0xcf, 0x9c, 0xf9, 0xce, 0xcf, 0xcc, 0x9c, 0xf9, 0x0c, 0xe9, 0x86, 0x61, 0xee, 0xb5, 0xe8,
-	0x52, 0xd3, 0xb1, 0x99, 0x8d, 0xa6, 0x82, 0xa3, 0x25, 0x31, 0x28, 0xa4, 0x6b, 0x76, 0xa3, 0x61,
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-	0xf4, 0x12, 0x24, 0xab, 0x1a, 0x25, 0x79, 0x65, 0x5e, 0x59, 0x1c, 0x5f, 0x39, 0xbb, 0x14, 0xb2,
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+	0x00, 0x00, 0x00, 0xff, 0xff, 0x74, 0x4c, 0x32, 0xc3, 0x7e, 0x21, 0x00, 0x00,
 }

 // Reference imports to suppress errors if they are not otherwise used.
@ -3282,3 +3334,75 @@ var _MilvusService_serviceDesc = grpc.ServiceDesc{
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "milvus.proto",
 }
+
+// ProxyServiceClient is the client API for ProxyService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type ProxyServiceClient interface {
+	RegisterLink(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*RegisterLinkResponse, error)
+}
+
+type proxyServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewProxyServiceClient(cc *grpc.ClientConn) ProxyServiceClient {
+	return &proxyServiceClient{cc}
+}
+
+func (c *proxyServiceClient) RegisterLink(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*RegisterLinkResponse, error) {
+	out := new(RegisterLinkResponse)
+	err := c.cc.Invoke(ctx, "/milvus.proto.milvus.ProxyService/RegisterLink", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ProxyServiceServer is the server API for ProxyService service.
+type ProxyServiceServer interface {
+	RegisterLink(context.Context, *commonpb.Empty) (*RegisterLinkResponse, error)
+}
+
+// UnimplementedProxyServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedProxyServiceServer struct {
+}
+
+func (*UnimplementedProxyServiceServer) RegisterLink(ctx context.Context, req *commonpb.Empty) (*RegisterLinkResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method RegisterLink not implemented")
+}
+
+func RegisterProxyServiceServer(s *grpc.Server, srv ProxyServiceServer) {
+	s.RegisterService(&_ProxyService_serviceDesc, srv)
+}
+
+func _ProxyService_RegisterLink_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(commonpb.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ProxyServiceServer).RegisterLink(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/milvus.proto.milvus.ProxyService/RegisterLink",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ProxyServiceServer).RegisterLink(ctx, req.(*commonpb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _ProxyService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "milvus.proto.milvus.ProxyService",
+	HandlerType: (*ProxyServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "RegisterLink",
+			Handler:    _ProxyService_RegisterLink_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "milvus.proto",
+}
--- a/internal/proto/proxy_service.proto
+++ b/internal/proto/proxy_service.proto
@ -14,10 +14,7 @@ message RegisterNodeRequest {

 message RegisterNodeResponse {
  internal.InitParams init_params = 1;
-}
-
-message RegisterLinkResponse {
-  common.Address address = 1;
+  common.Status status = 2;
 }

 message InvalidateCollMetaCacheRequest {
@ -27,7 +24,6 @@ message InvalidateCollMetaCacheRequest {
 }

 service ProxyService {
-  rpc RegisterLink(common.Empty) returns (RegisterLinkResponse) {}
  rpc RegisterNode(RegisterNodeRequest) returns (RegisterNodeResponse) {}
  rpc InvalidateCollectionMetaCache(InvalidateCollMetaCacheRequest) returns (common.Status) {}
 }
--- a/internal/proto/proxypb/proxy_service.pb.go
+++ b/internal/proto/proxypb/proxy_service.pb.go
@ -75,6 +75,7 @@ func (m *RegisterNodeRequest) GetAddress() *commonpb.Address {

 type RegisterNodeResponse struct {
 	InitParams           *internalpb2.InitParams `protobuf:"bytes,1,opt,name=init_params,json=initParams,proto3" json:"init_params,omitempty"`
+	Status               *commonpb.Status        `protobuf:"bytes,2,opt,name=status,proto3" json:"status,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                `json:"-"`
 	XXX_unrecognized     []byte                  `json:"-"`
 	XXX_sizecache        int32                   `json:"-"`
@ -112,41 +113,9 @@ func (m *RegisterNodeResponse) GetInitParams() *internalpb2.InitParams {
 	return nil
 }

-type RegisterLinkResponse struct {
-	Address              *commonpb.Address `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
-	XXX_unrecognized     []byte            `json:"-"`
-	XXX_sizecache        int32             `json:"-"`
-}
-
-func (m *RegisterLinkResponse) Reset()         { *m = RegisterLinkResponse{} }
-func (m *RegisterLinkResponse) String() string { return proto.CompactTextString(m) }
-func (*RegisterLinkResponse) ProtoMessage()    {}
-func (*RegisterLinkResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_34ca2fbc94d169de, []int{2}
-}
-
-func (m *RegisterLinkResponse) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_RegisterLinkResponse.Unmarshal(m, b)
-}
-func (m *RegisterLinkResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_RegisterLinkResponse.Marshal(b, m, deterministic)
-}
-func (m *RegisterLinkResponse) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_RegisterLinkResponse.Merge(m, src)
-}
-func (m *RegisterLinkResponse) XXX_Size() int {
-	return xxx_messageInfo_RegisterLinkResponse.Size(m)
-}
-func (m *RegisterLinkResponse) XXX_DiscardUnknown() {
-	xxx_messageInfo_RegisterLinkResponse.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_RegisterLinkResponse proto.InternalMessageInfo
-
-func (m *RegisterLinkResponse) GetAddress() *commonpb.Address {
+func (m *RegisterNodeResponse) GetStatus() *commonpb.Status {
 	if m != nil {
-		return m.Address
+		return m.Status
 	}
 	return nil
 }
@ -164,7 +133,7 @@ func (m *InvalidateCollMetaCacheRequest) Reset()         { *m = InvalidateCollMe
 func (m *InvalidateCollMetaCacheRequest) String() string { return proto.CompactTextString(m) }
 func (*InvalidateCollMetaCacheRequest) ProtoMessage()    {}
 func (*InvalidateCollMetaCacheRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_34ca2fbc94d169de, []int{3}
+	return fileDescriptor_34ca2fbc94d169de, []int{2}
 }

 func (m *InvalidateCollMetaCacheRequest) XXX_Unmarshal(b []byte) error {
@ -209,41 +178,39 @@ func (m *InvalidateCollMetaCacheRequest) GetCollectionName() string {
 func init() {
 	proto.RegisterType((*RegisterNodeRequest)(nil), "milvus.proto.proxy.RegisterNodeRequest")
 	proto.RegisterType((*RegisterNodeResponse)(nil), "milvus.proto.proxy.RegisterNodeResponse")
-	proto.RegisterType((*RegisterLinkResponse)(nil), "milvus.proto.proxy.RegisterLinkResponse")
 	proto.RegisterType((*InvalidateCollMetaCacheRequest)(nil), "milvus.proto.proxy.InvalidateCollMetaCacheRequest")
 }

 func init() { proto.RegisterFile("proxy_service.proto", fileDescriptor_34ca2fbc94d169de) }

 var fileDescriptor_34ca2fbc94d169de = []byte{
-	// 429 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xc4, 0x52, 0x4d, 0x6b, 0x14, 0x41,
-	0x10, 0xdd, 0x89, 0x92, 0x60, 0x67, 0x89, 0xd2, 0x11, 0x0c, 0xe3, 0x07, 0x3a, 0x97, 0xe4, 0xe2,
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-	0x8b, 0xdd, 0xc2, 0x9e, 0xee, 0xb1, 0xbb, 0x66, 0x31, 0xb9, 0x78, 0xf3, 0x17, 0xf8, 0x7f, 0xfc,
-	0x6b, 0x32, 0xdd, 0xd9, 0x2f, 0x1c, 0x06, 0xc4, 0x43, 0x6e, 0x53, 0x3d, 0xaf, 0x5e, 0xbd, 0x7a,
-	0xf5, 0xd8, 0x61, 0x6d, 0xcd, 0xf7, 0x9b, 0xa9, 0x03, 0xbb, 0xc0, 0x12, 0xd2, 0xda, 0x1a, 0x32,
-	0x9c, 0x57, 0xa8, 0x16, 0x8d, 0x0b, 0x55, 0xea, 0x11, 0xf1, 0xb0, 0x34, 0x55, 0x65, 0x74, 0x78,
-	0x8b, 0x0f, 0x50, 0x13, 0x58, 0x2d, 0x54, 0xa8, 0x93, 0x1f, 0xec, 0x30, 0x87, 0x19, 0x3a, 0x02,
-	0x3b, 0x31, 0x12, 0x72, 0xf8, 0xd6, 0x80, 0x23, 0xfe, 0x8e, 0x3d, 0x2c, 0x84, 0x83, 0xa3, 0xe8,
-	0x75, 0x74, 0xb2, 0x3f, 0x7a, 0x91, 0x6e, 0xf1, 0xde, 0x11, 0x5e, 0xb8, 0xd9, 0x58, 0x38, 0xc8,
-	0x3d, 0x92, 0x7f, 0x60, 0x7b, 0x42, 0x4a, 0x0b, 0xce, 0x1d, 0xed, 0xf4, 0x34, 0x9d, 0x06, 0x4c,
-	0xbe, 0x04, 0x27, 0xd7, 0xec, 0xe9, 0xb6, 0x00, 0x57, 0x1b, 0xed, 0x80, 0x8f, 0xd9, 0x3e, 0x6a,
-	0xa4, 0x69, 0x2d, 0xac, 0xa8, 0xdc, 0x9d, 0x90, 0x37, 0xdb, 0x9c, 0xab, 0x5d, 0xce, 0x35, 0xd2,
-	0xa5, 0x07, 0xe6, 0x0c, 0x57, 0xdf, 0xc9, 0x64, 0xcd, 0xfd, 0x19, 0xf5, 0xd7, 0x15, 0xf7, 0x86,
-	0xd6, 0xe8, 0x5f, 0xb4, 0xfe, 0x8a, 0xd8, 0xab, 0x73, 0xbd, 0x10, 0x0a, 0xa5, 0x20, 0x38, 0x33,
-	0x4a, 0x5d, 0x00, 0x89, 0x33, 0x51, 0xce, 0xff, 0xc3, 0xb8, 0x67, 0x6c, 0x4f, 0x16, 0x53, 0x2d,
-	0x2a, 0xf0, 0xc6, 0x3d, 0xca, 0x77, 0x65, 0x31, 0x11, 0x15, 0xf0, 0x63, 0xf6, 0xb8, 0x34, 0x4a,
-	0x41, 0x49, 0x68, 0x74, 0x00, 0x3c, 0xf0, 0x80, 0x83, 0xf5, 0x73, 0x0b, 0x1c, 0xfd, 0xde, 0x61,
-	0xc3, 0xcb, 0xf6, 0xd6, 0x57, 0x21, 0x0c, 0xfc, 0x0b, 0x1b, 0x6e, 0xee, 0xcd, 0xe3, 0x4e, 0x19,
-	0x9f, 0xaa, 0x9a, 0x6e, 0xe2, 0x93, 0xf4, 0xef, 0xcc, 0xa4, 0x5d, 0xae, 0x25, 0x03, 0x5e, 0xae,
-	0x79, 0xdb, 0x5b, 0xf1, 0xe3, 0xbe, 0xde, 0x8d, 0x38, 0xf5, 0x0f, 0xd9, 0x3c, 0x7b, 0x32, 0xe0,
-	0x96, 0xbd, 0xdc, 0xf6, 0x38, 0x6c, 0xba, 0x72, 0x9a, 0x8f, 0xba, 0xc8, 0xfa, 0xcf, 0x12, 0x3f,
-	0xef, 0x74, 0xe0, 0x8a, 0x04, 0x35, 0x2e, 0x19, 0x8c, 0x7e, 0x46, 0xec, 0x89, 0x77, 0xb0, 0xd5,
-	0xb2, 0x74, 0xf1, 0x1e, 0x84, 0x8c, 0x4f, 0xaf, 0x3f, 0xce, 0x90, 0xe6, 0x4d, 0xd1, 0xfe, 0xc9,
-	0x6e, 0x51, 0x29, 0xbc, 0x25, 0x28, 0xe7, 0x59, 0xe8, 0x7a, 0x2b, 0xd1, 0x91, 0xc5, 0xa2, 0x21,
-	0x90, 0xd9, 0x32, 0xfd, 0x99, 0xa7, 0xca, 0xfc, 0xf8, 0xba, 0x28, 0x76, 0x7d, 0xf9, 0xfe, 0x4f,
-	0x00, 0x00, 0x00, 0xff, 0xff, 0x25, 0x02, 0x4c, 0xbc, 0x21, 0x04, 0x00, 0x00,
+	// 403 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xc4, 0x92, 0x3f, 0xaf, 0xda, 0x30,
+	0x14, 0xc5, 0x49, 0x5b, 0x81, 0x6a, 0x10, 0xad, 0x4c, 0xa5, 0xa2, 0xf4, 0x8f, 0xda, 0x2c, 0xb0,
+	0x34, 0xa9, 0x82, 0xd4, 0xb5, 0x02, 0x26, 0x06, 0x10, 0x0a, 0x5b, 0x17, 0xe4, 0xc4, 0x57, 0x60,
+	0xc9, 0xb1, 0x53, 0xdb, 0x41, 0x2d, 0x4b, 0xb7, 0xae, 0x5d, 0xfa, 0x1d, 0xfb, 0x35, 0xaa, 0xd8,
+	0x84, 0xf7, 0xa2, 0x87, 0x78, 0xc3, 0x1b, 0xde, 0x96, 0xeb, 0xfc, 0x7c, 0x72, 0xee, 0x39, 0x41,
+	0x83, 0x42, 0xc9, 0x1f, 0x3f, 0xb7, 0x1a, 0xd4, 0x81, 0x65, 0x10, 0x16, 0x4a, 0x1a, 0x89, 0x71,
+	0xce, 0xf8, 0xa1, 0xd4, 0x6e, 0x0a, 0x2d, 0xe1, 0xf7, 0x32, 0x99, 0xe7, 0x52, 0xb8, 0x33, 0xbf,
+	0xcf, 0x84, 0x01, 0x25, 0x08, 0x77, 0x73, 0xf0, 0x0b, 0x0d, 0x12, 0xd8, 0x31, 0x6d, 0x40, 0xad,
+	0x24, 0x85, 0x04, 0xbe, 0x97, 0xa0, 0x0d, 0xfe, 0x8c, 0x9e, 0xa5, 0x44, 0xc3, 0xd0, 0xfb, 0xe0,
+	0x8d, 0xbb, 0xf1, 0xdb, 0xb0, 0xa1, 0x7b, 0x12, 0x5c, 0xea, 0xdd, 0x8c, 0x68, 0x48, 0x2c, 0x89,
+	0xbf, 0xa0, 0x0e, 0xa1, 0x54, 0x81, 0xd6, 0xc3, 0x27, 0x57, 0x2e, 0x4d, 0x1d, 0x93, 0xd4, 0x70,
+	0xf0, 0xc7, 0x43, 0xaf, 0x9a, 0x0e, 0x74, 0x21, 0x85, 0x06, 0x3c, 0x43, 0x5d, 0x26, 0x98, 0xd9,
+	0x16, 0x44, 0x91, 0x5c, 0x9f, 0x9c, 0x7c, 0x6c, 0x8a, 0x9e, 0x97, 0x59, 0x08, 0x66, 0xd6, 0x16,
+	0x4c, 0x10, 0x3b, 0x3f, 0xe3, 0x09, 0x6a, 0x6b, 0x43, 0x4c, 0x59, 0x7b, 0x7a, 0x73, 0xd1, 0xd3,
+	0xc6, 0x22, 0xc9, 0x09, 0x0d, 0xfe, 0x7a, 0xe8, 0xfd, 0x42, 0x1c, 0x08, 0x67, 0x94, 0x18, 0x98,
+	0x4b, 0xce, 0x97, 0x60, 0xc8, 0x9c, 0x64, 0xfb, 0x07, 0xc4, 0xf3, 0x1a, 0x75, 0x68, 0xba, 0x15,
+	0x24, 0x07, 0x6b, 0xe5, 0x79, 0xd2, 0xa6, 0xe9, 0x8a, 0xe4, 0x80, 0x47, 0xe8, 0x45, 0x26, 0x39,
+	0x87, 0xcc, 0x30, 0x29, 0x1c, 0xf0, 0xd4, 0x02, 0xfd, 0x9b, 0xe3, 0x0a, 0x8c, 0xff, 0x79, 0xa8,
+	0xb7, 0xae, 0x1a, 0xdd, 0xb8, 0xca, 0x71, 0x86, 0x7a, 0xb7, 0x83, 0xc3, 0xa3, 0xf0, 0x6e, 0xfb,
+	0xe1, 0x85, 0x72, 0xfd, 0xf1, 0xfd, 0xa0, 0xeb, 0x20, 0x68, 0x61, 0x85, 0xde, 0x35, 0xb3, 0x70,
+	0x8e, 0xce, 0x89, 0xe0, 0xf8, 0x92, 0xd8, 0xf5, 0xf8, 0xfc, 0x6b, 0x35, 0x04, 0xad, 0xf8, 0xb7,
+	0x87, 0x5e, 0xda, 0x4d, 0x2b, 0x2f, 0xf5, 0xb6, 0x8f, 0x60, 0x64, 0x36, 0xfd, 0xf6, 0x75, 0xc7,
+	0xcc, 0xbe, 0x4c, 0xab, 0x37, 0xd1, 0x91, 0x71, 0xce, 0x8e, 0x06, 0xb2, 0x7d, 0xe4, 0x6e, 0x7d,
+	0xa2, 0x4c, 0x1b, 0xc5, 0xd2, 0xd2, 0x00, 0x8d, 0xea, 0x5f, 0x31, 0xb2, 0x52, 0x91, 0xfd, 0x7c,
+	0x91, 0xa6, 0x6d, 0x3b, 0x4e, 0xfe, 0x07, 0x00, 0x00, 0xff, 0xff, 0xa8, 0x2b, 0x26, 0x14, 0xaf,
+	0x03, 0x00, 0x00,
 }

 // Reference imports to suppress errors if they are not otherwise used.
@ -258,7 +225,6 @@ const _ = grpc.SupportPackageIsVersion4
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type ProxyServiceClient interface {
-	RegisterLink(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*RegisterLinkResponse, error)
 	RegisterNode(ctx context.Context, in *RegisterNodeRequest, opts ...grpc.CallOption) (*RegisterNodeResponse, error)
 	InvalidateCollectionMetaCache(ctx context.Context, in *InvalidateCollMetaCacheRequest, opts ...grpc.CallOption) (*commonpb.Status, error)
 }
@ -271,15 +237,6 @@ func NewProxyServiceClient(cc *grpc.ClientConn) ProxyServiceClient {
 	return &proxyServiceClient{cc}
 }

-func (c *proxyServiceClient) RegisterLink(ctx context.Context, in *commonpb.Empty, opts ...grpc.CallOption) (*RegisterLinkResponse, error) {
-	out := new(RegisterLinkResponse)
-	err := c.cc.Invoke(ctx, "/milvus.proto.proxy.ProxyService/RegisterLink", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
 func (c *proxyServiceClient) RegisterNode(ctx context.Context, in *RegisterNodeRequest, opts ...grpc.CallOption) (*RegisterNodeResponse, error) {
 	out := new(RegisterNodeResponse)
 	err := c.cc.Invoke(ctx, "/milvus.proto.proxy.ProxyService/RegisterNode", in, out, opts...)
@ -300,7 +257,6 @@ func (c *proxyServiceClient) InvalidateCollectionMetaCache(ctx context.Context,

 // ProxyServiceServer is the server API for ProxyService service.
 type ProxyServiceServer interface {
-	RegisterLink(context.Context, *commonpb.Empty) (*RegisterLinkResponse, error)
 	RegisterNode(context.Context, *RegisterNodeRequest) (*RegisterNodeResponse, error)
 	InvalidateCollectionMetaCache(context.Context, *InvalidateCollMetaCacheRequest) (*commonpb.Status, error)
 }
@ -309,9 +265,6 @@ type ProxyServiceServer interface {
 type UnimplementedProxyServiceServer struct {
 }

-func (*UnimplementedProxyServiceServer) RegisterLink(ctx context.Context, req *commonpb.Empty) (*RegisterLinkResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method RegisterLink not implemented")
-}
 func (*UnimplementedProxyServiceServer) RegisterNode(ctx context.Context, req *RegisterNodeRequest) (*RegisterNodeResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method RegisterNode not implemented")
 }
@ -323,24 +276,6 @@ func RegisterProxyServiceServer(s *grpc.Server, srv ProxyServiceServer) {
 	s.RegisterService(&_ProxyService_serviceDesc, srv)
 }

-func _ProxyService_RegisterLink_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(commonpb.Empty)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ProxyServiceServer).RegisterLink(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/milvus.proto.proxy.ProxyService/RegisterLink",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProxyServiceServer).RegisterLink(ctx, req.(*commonpb.Empty))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
 func _ProxyService_RegisterNode_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(RegisterNodeRequest)
 	if err := dec(in); err != nil {
@ -381,10 +316,6 @@ var _ProxyService_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "milvus.proto.proxy.ProxyService",
 	HandlerType: (*ProxyServiceServer)(nil),
 	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "RegisterLink",
-			Handler:    _ProxyService_RegisterLink_Handler,
-		},
 		{
 			MethodName: "RegisterNode",
 			Handler:    _ProxyService_RegisterNode_Handler,
--- a/internal/proxynode/paramtable.go
+++ b/internal/proxynode/paramtable.go
@ -66,6 +66,12 @@ func (pt *ParamTable) NetworkAddress() string {
 }

 func (pt *ParamTable) ProxyServiceAddress() string {
+	addressFromEnv := os.Getenv("PROXY_SERVICE_ADDRESS")
+	if len(addressFromEnv) > 0 {
+		// TODO: or write to param table?
+		return addressFromEnv
+	}
+
 	addr, err := pt.Load("proxyService.address")
 	if err != nil {
 		panic(err)
--- a/internal/proxynode/proxy_node.go
+++ b/internal/proxynode/proxy_node.go
@ -11,6 +11,8 @@ import (

 	"github.com/zilliztech/milvus-distributed/internal/msgstream/pulsarms"

+	grpcproxyservice "github.com/zilliztech/milvus-distributed/internal/distributed/proxyservice"
+
 	"github.com/zilliztech/milvus-distributed/internal/proto/internalpb2"

 	"github.com/opentracing/opentracing-go"
@ -32,9 +34,10 @@ type NodeImpl struct {
 	cancel func()
 	wg     sync.WaitGroup

-	initParams *internalpb2.InitParams
-	ip         string
-	port       int
+	proxyServiceClient *grpcproxyservice.Client
+	initParams         *internalpb2.InitParams
+	ip                 string
+	port               int

 	masterConn   *grpc.ClientConn
 	masterClient masterpb.MasterServiceClient
--- a/internal/proxyservice/impl.go
+++ b/internal/proxyservice/impl.go
@ -0,0 +1,145 @@
+package proxyservice
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/milvuspb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/internalpb2"
+	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+)
+
+const (
+	timeoutInterval = time.Second * 10
+)
+
+func (s ServiceImpl) Init() error {
+	return nil
+}
+
+func (s *ServiceImpl) Start() error {
+	s.sched.Start()
+	return nil
+}
+
+func (s *ServiceImpl) Stop() error {
+	s.sched.Close()
+	return nil
+}
+
+func (s *ServiceImpl) GetComponentStates() (*internalpb2.ComponentStates, error) {
+	panic("implement me")
+}
+
+func (s *ServiceImpl) GetTimeTickChannel() (string, error) {
+	panic("implement me")
+}
+
+func (s *ServiceImpl) GetStatisticsChannel() (string, error) {
+	panic("implement me")
+}
+
+func (s *ServiceImpl) RegisterLink() (*milvuspb.RegisterLinkResponse, error) {
+	fmt.Println("register link")
+	ctx, cancel := context.WithTimeout(s.ctx, timeoutInterval)
+	defer cancel()
+
+	t := &RegisterLinkTask{
+		Condition: NewTaskCondition(ctx),
+		nodeInfos: s.nodeInfos,
+	}
+
+	var err error
+
+	err = s.sched.RegisterLinkTaskQueue.Enqueue(t)
+	if err != nil {
+		return &milvuspb.RegisterLinkResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UNEXPECTED_ERROR,
+				Reason:    err.Error(),
+			},
+			Address: nil,
+		}, nil
+	}
+
+	err = t.WaitToFinish()
+	if err != nil {
+		return &milvuspb.RegisterLinkResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UNEXPECTED_ERROR,
+				Reason:    err.Error(),
+			},
+			Address: nil,
+		}, nil
+	}
+
+	return t.response, nil
+}
+
+func (s *ServiceImpl) RegisterNode(request *proxypb.RegisterNodeRequest) (*proxypb.RegisterNodeResponse, error) {
+	fmt.Println("RegisterNode: ", request)
+	ctx, cancel := context.WithTimeout(s.ctx, timeoutInterval)
+	defer cancel()
+
+	t := &RegisterNodeTask{
+		request:   request,
+		Condition: NewTaskCondition(ctx),
+		allocator: s.allocator,
+		nodeInfos: s.nodeInfos,
+	}
+
+	var err error
+
+	err = s.sched.RegisterNodeTaskQueue.Enqueue(t)
+	if err != nil {
+		return &proxypb.RegisterNodeResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UNEXPECTED_ERROR,
+				Reason:    err.Error(),
+			},
+			InitParams: nil,
+		}, nil
+	}
+
+	err = t.WaitToFinish()
+	if err != nil {
+		return &proxypb.RegisterNodeResponse{
+			Status: &commonpb.Status{
+				ErrorCode: commonpb.ErrorCode_UNEXPECTED_ERROR,
+				Reason:    err.Error(),
+			},
+			InitParams: nil,
+		}, nil
+	}
+
+	return t.response, nil
+}
+
+func (s *ServiceImpl) InvalidateCollectionMetaCache(request *proxypb.InvalidateCollMetaCacheRequest) error {
+	fmt.Println("InvalidateCollectionMetaCache")
+	ctx, cancel := context.WithTimeout(s.ctx, timeoutInterval)
+	defer cancel()
+
+	t := &InvalidateCollectionMetaCacheTask{
+		request:   request,
+		Condition: NewTaskCondition(ctx),
+	}
+
+	var err error
+
+	err = s.sched.RegisterNodeTaskQueue.Enqueue(t)
+	if err != nil {
+		return err
+	}
+
+	err = t.WaitToFinish()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
--- a/internal/proxyservice/interface.go
+++ b/internal/proxyservice/interface.go
@ -0,0 +1,19 @@
+package proxyservice
+
+import (
+	"github.com/zilliztech/milvus-distributed/internal/proto/milvuspb"
+	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+	"github.com/zilliztech/milvus-distributed/internal/util/typeutil"
+)
+
+type Component = typeutil.Component
+type Service = typeutil.Service
+
+type ProxyService interface {
+	Component
+	Service
+	RegisterLink() (*milvuspb.RegisterLinkResponse, error)
+	RegisterNode(request *proxypb.RegisterNodeRequest) (*proxypb.RegisterNodeResponse, error)
+	// TODO: i'm sure it's not a best way to keep consistency, fix me
+	InvalidateCollectionMetaCache(request *proxypb.InvalidateCollMetaCacheRequest) error
+}
--- a/internal/proxyservice/node_info.go
+++ b/internal/proxyservice/node_info.go
@ -0,0 +1,116 @@
+package proxyservice
+
+import (
+	"fmt"
+	"math/rand"
+	"sync"
+	"time"
+
+	"github.com/zilliztech/milvus-distributed/internal/errors"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+)
+
+type NodeInfo struct {
+	ip   string
+	port int64
+}
+
+// TODO: replace as real node client impl
+type NodeClient interface {
+	InvalidateCollectionMetaCache(request *proxypb.InvalidateCollMetaCacheRequest) error
+}
+
+type FakeNodeClient struct {
+}
+
+func (c *FakeNodeClient) InvalidateCollectionMetaCache(request *proxypb.InvalidateCollMetaCacheRequest) error {
+	panic("implement me")
+}
+
+type GlobalNodeInfoTable struct {
+	mtx             sync.RWMutex
+	nodeIDs         []UniqueID
+	infos           map[UniqueID]*NodeInfo
+	createClientMtx sync.RWMutex
+	// lazy creating, so len(clients) <= len(infos)
+	clients map[UniqueID]NodeClient
+}
+
+func (table *GlobalNodeInfoTable) randomPick() UniqueID {
+	rand.Seed(time.Now().UnixNano())
+	l := len(table.nodeIDs)
+	choice := rand.Intn(l)
+	return table.nodeIDs[choice]
+}
+
+func (table *GlobalNodeInfoTable) Pick() (*NodeInfo, error) {
+	table.mtx.RLock()
+	defer table.mtx.RUnlock()
+
+	if len(table.nodeIDs) <= 0 || len(table.infos) <= 0 {
+		return nil, errors.New("no available server node")
+	}
+
+	id := table.randomPick()
+	info, ok := table.infos[id]
+	if !ok {
+		// though impossible
+		return nil, errors.New("fix me, something wrong in pick algorithm")
+	}
+
+	return info, nil
+}
+
+func (table *GlobalNodeInfoTable) Register(id UniqueID, info *NodeInfo) error {
+	table.mtx.Lock()
+	defer table.mtx.Unlock()
+
+	_, ok := table.infos[id]
+	if !ok {
+		table.infos[id] = info
+	}
+
+	if !SliceContain(table.nodeIDs, id) {
+		table.nodeIDs = append(table.nodeIDs, id)
+	}
+
+	return nil
+}
+
+func (table *GlobalNodeInfoTable) createClients() error {
+	if len(table.clients) == len(table.infos) {
+		return nil
+	}
+
+	for nodeID, info := range table.infos {
+		_, ok := table.clients[nodeID]
+		if !ok {
+			// TODO: use info to create client
+			fmt.Println(info)
+			table.clients[nodeID] = &FakeNodeClient{}
+		}
+	}
+
+	return nil
+}
+
+func (table *GlobalNodeInfoTable) ObtainAllClients() (map[UniqueID]NodeClient, error) {
+	table.mtx.RLock()
+	defer table.mtx.RUnlock()
+
+	table.createClientMtx.Lock()
+	defer table.createClientMtx.Unlock()
+
+	err := table.createClients()
+
+	return table.clients, err
+}
+
+func NewGlobalNodeInfoTable() *GlobalNodeInfoTable {
+	return &GlobalNodeInfoTable{
+		nodeIDs: make([]UniqueID, 0),
+		infos:   make(map[UniqueID]*NodeInfo),
+		clients: make(map[UniqueID]NodeClient),
+	}
+}
--- a/internal/proxyservice/nodeid_allocator.go
+++ b/internal/proxyservice/nodeid_allocator.go
@ -0,0 +1,33 @@
+package proxyservice
+
+import (
+	"sync"
+
+	"github.com/zilliztech/milvus-distributed/internal/util/typeutil"
+)
+
+type UniqueID = typeutil.UniqueID
+
+type NodeIDAllocator interface {
+	AllocOne() UniqueID
+}
+
+type NaiveNodeIDAllocatorImpl struct {
+	mtx sync.Mutex
+	now UniqueID
+}
+
+func (allocator *NaiveNodeIDAllocatorImpl) AllocOne() UniqueID {
+	allocator.mtx.Lock()
+	defer func() {
+		allocator.now++
+		allocator.mtx.Unlock()
+	}()
+	return allocator.now
+}
+
+func NewNodeIDAllocator() NodeIDAllocator {
+	return &NaiveNodeIDAllocatorImpl{
+		now: 0,
+	}
+}
--- a/internal/proxyservice/proxyservice.go
+++ b/internal/proxyservice/proxyservice.go
@ -1,54 +1,31 @@
 package proxyservice

 import (
-	"github.com/zilliztech/milvus-distributed/internal/proto/internalpb2"
-	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+	"context"
+	"math/rand"
+	"time"
 )

-type ProxyService struct {
-	// implement Service
-
-	//nodeClients [] .Interface
-	// factory method
+type ServiceImpl struct {
+	allocator NodeIDAllocator
+	sched     *TaskScheduler
+	nodeInfos *GlobalNodeInfoTable

+	ctx    context.Context
+	cancel context.CancelFunc
 }

-func (s ProxyService) Init() error {
-	panic("implement me")
-}
+func CreateProxyService(ctx context.Context) (ProxyService, error) {
+	rand.Seed(time.Now().UnixNano())
+	ctx1, cancel := context.WithCancel(ctx)
+	s := &ServiceImpl{
+		ctx:    ctx1,
+		cancel: cancel,
+	}

-func (s ProxyService) Start() error {
-	panic("implement me")
-}
+	s.allocator = NewNodeIDAllocator()
+	s.sched = NewTaskScheduler(ctx1)
+	s.nodeInfos = NewGlobalNodeInfoTable()

-func (s ProxyService) Stop() error {
-	panic("implement me")
-}
-
-func (s ProxyService) GetComponentStates() (*internalpb2.ComponentStates, error) {
-	panic("implement me")
-}
-
-func (s ProxyService) GetTimeTickChannel() (string, error) {
-	panic("implement me")
-}
-
-func (s ProxyService) GetStatisticsChannel() (string, error) {
-	panic("implement me")
-}
-
-func (s ProxyService) RegisterLink() (proxypb.RegisterLinkResponse, error) {
-	panic("implement me")
-}
-
-func (s ProxyService) RegisterNode(request proxypb.RegisterNodeRequest) (proxypb.RegisterNodeResponse, error) {
-	panic("implement me")
-}
-
-func (s ProxyService) InvalidateCollectionMetaCache(request proxypb.InvalidateCollMetaCacheRequest) error {
-	panic("implement me")
-}
-
-func NewProxyServiceImpl() interface{} {
-	return &ProxyService{}
+	return s, nil
 }
--- a/internal/proxyservice/task.go
+++ b/internal/proxyservice/task.go
@ -0,0 +1,157 @@
+package proxyservice
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/internalpb2"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/milvuspb"
+
+	"github.com/zilliztech/milvus-distributed/internal/proto/proxypb"
+
+	"github.com/zilliztech/milvus-distributed/internal/errors"
+)
+
+type TaskEnum = int
+
+const (
+	FromSDK    TaskEnum = 0
+	FromMaster TaskEnum = 1
+	FromNode   TaskEnum = 2
+)
+
+type task interface {
+	PreExecute() error
+	Execute() error
+	PostExecute() error
+	WaitToFinish() error
+	Notify(err error)
+}
+
+type Condition interface {
+	WaitToFinish() error
+	Notify(err error)
+}
+
+type TaskCondition struct {
+	done chan error
+	ctx  context.Context
+}
+
+func (c *TaskCondition) WaitToFinish() error {
+	select {
+	case <-c.ctx.Done():
+		return errors.New("timeout")
+	case err := <-c.done:
+		return err
+	}
+}
+
+func (c *TaskCondition) Notify(err error) {
+	c.done <- err
+}
+
+func NewTaskCondition(ctx context.Context) Condition {
+	return &TaskCondition{
+		done: make(chan error),
+		ctx:  ctx,
+	}
+}
+
+type RegisterLinkTask struct {
+	Condition
+	response  *milvuspb.RegisterLinkResponse
+	nodeInfos *GlobalNodeInfoTable
+}
+
+func (t *RegisterLinkTask) PreExecute() error {
+	return nil
+}
+
+func (t *RegisterLinkTask) Execute() error {
+	info, err := t.nodeInfos.Pick()
+	fmt.Println("info: ", info)
+	if err != nil {
+		return err
+	}
+	t.response = &milvuspb.RegisterLinkResponse{
+		Address: &commonpb.Address{
+			Ip:   info.ip,
+			Port: info.port,
+		},
+		Status: &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_SUCCESS,
+			Reason:    "",
+		},
+	}
+	return nil
+}
+
+func (t *RegisterLinkTask) PostExecute() error {
+	return nil
+}
+
+type RegisterNodeTask struct {
+	Condition
+	request   *proxypb.RegisterNodeRequest
+	response  *proxypb.RegisterNodeResponse
+	allocator NodeIDAllocator
+	nodeInfos *GlobalNodeInfoTable
+}
+
+func (t *RegisterNodeTask) PreExecute() error {
+	return nil
+}
+
+func (t *RegisterNodeTask) Execute() error {
+	nodeID := t.allocator.AllocOne()
+	info := NodeInfo{
+		ip:   t.request.Address.Ip,
+		port: t.request.Address.Port,
+	}
+	err := t.nodeInfos.Register(nodeID, &info)
+	// TODO: fill init params
+	t.response = &proxypb.RegisterNodeResponse{
+		InitParams: &internalpb2.InitParams{
+			NodeID:      nodeID,
+			StartParams: nil,
+		},
+	}
+	return err
+}
+
+func (t *RegisterNodeTask) PostExecute() error {
+	return nil
+}
+
+type InvalidateCollectionMetaCacheTask struct {
+	Condition
+	request   *proxypb.InvalidateCollMetaCacheRequest
+	nodeInfos *GlobalNodeInfoTable
+}
+
+func (t *InvalidateCollectionMetaCacheTask) PreExecute() error {
+	return nil
+}
+
+func (t *InvalidateCollectionMetaCacheTask) Execute() error {
+	var err error
+	clients, err := t.nodeInfos.ObtainAllClients()
+	if err != nil {
+		return err
+	}
+	for _, c := range clients {
+		err = c.InvalidateCollectionMetaCache(t.request)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (t *InvalidateCollectionMetaCacheTask) PostExecute() error {
+	return nil
+}
--- a/internal/proxyservice/task_queue.go
+++ b/internal/proxyservice/task_queue.go
@ -0,0 +1,92 @@
+package proxyservice
+
+import (
+	"container/list"
+	"log"
+	"sync"
+
+	"github.com/zilliztech/milvus-distributed/internal/errors"
+)
+
+type TaskQueue interface {
+	Chan() <-chan int
+	Empty() bool
+	Full() bool
+	addTask(t task) error
+	FrontTask() task
+	PopTask() task
+	Enqueue(t task) error
+}
+
+type BaseTaskQueue struct {
+	tasks *list.List
+	mtx   sync.Mutex
+
+	// maxTaskNum should keep still
+	maxTaskNum int64
+
+	bufChan chan int // to block scheduler
+}
+
+func (queue *BaseTaskQueue) Chan() <-chan int {
+	return queue.bufChan
+}
+
+func (queue *BaseTaskQueue) Empty() bool {
+	return queue.tasks.Len() <= 0
+}
+
+func (queue *BaseTaskQueue) Full() bool {
+	return int64(queue.tasks.Len()) >= queue.maxTaskNum
+}
+
+func (queue *BaseTaskQueue) addTask(t task) error {
+	queue.mtx.Lock()
+	defer queue.mtx.Unlock()
+
+	if queue.Full() {
+		return errors.New("task queue is full")
+	}
+	queue.tasks.PushBack(t)
+	queue.bufChan <- 1
+	return nil
+}
+
+func (queue *BaseTaskQueue) FrontTask() task {
+	queue.mtx.Lock()
+	defer queue.mtx.Unlock()
+
+	if queue.tasks.Len() <= 0 {
+		log.Panic("sorry, but the task list is empty!")
+		return nil
+	}
+
+	return queue.tasks.Front().Value.(task)
+}
+
+func (queue *BaseTaskQueue) PopTask() task {
+	queue.mtx.Lock()
+	defer queue.mtx.Unlock()
+
+	if queue.tasks.Len() <= 0 {
+		log.Panic("sorry, but the task list is empty!")
+		return nil
+	}
+
+	ft := queue.tasks.Front()
+	queue.tasks.Remove(ft)
+
+	return ft.Value.(task)
+}
+
+func (queue *BaseTaskQueue) Enqueue(t task) error {
+	return queue.addTask(t)
+}
+
+func NewBaseTaskQueue() TaskQueue {
+	return &BaseTaskQueue{
+		tasks:      list.New(),
+		maxTaskNum: 1024,
+		bufChan:    make(chan int, 1024),
+	}
+}
--- a/internal/proxyservice/task_scheduler.go
+++ b/internal/proxyservice/task_scheduler.go
@ -0,0 +1,119 @@
+package proxyservice
+
+import (
+	"context"
+	"sync"
+)
+
+type TaskScheduler struct {
+	RegisterLinkTaskQueue                  TaskQueue
+	RegisterNodeTaskQueue                  TaskQueue
+	InvalidateCollectionMetaCacheTaskQueue TaskQueue
+
+	wg     sync.WaitGroup
+	ctx    context.Context
+	cancel context.CancelFunc
+}
+
+func NewTaskScheduler(ctx context.Context) *TaskScheduler {
+	ctx1, cancel := context.WithCancel(ctx)
+
+	return &TaskScheduler{
+		RegisterLinkTaskQueue:                  NewBaseTaskQueue(),
+		RegisterNodeTaskQueue:                  NewBaseTaskQueue(),
+		InvalidateCollectionMetaCacheTaskQueue: NewBaseTaskQueue(),
+		ctx:                                    ctx1,
+		cancel:                                 cancel,
+	}
+}
+
+func (sched *TaskScheduler) scheduleRegisterLinkTask() task {
+	return sched.RegisterLinkTaskQueue.PopTask()
+}
+
+func (sched *TaskScheduler) scheduleRegisterNodeTask() task {
+	return sched.RegisterNodeTaskQueue.PopTask()
+}
+
+func (sched *TaskScheduler) scheduleInvalidateCollectionMetaCacheTask() task {
+	return sched.InvalidateCollectionMetaCacheTaskQueue.PopTask()
+}
+
+func (sched *TaskScheduler) processTask(t task, q TaskQueue) {
+	var err error
+	err = t.PreExecute()
+
+	defer func() {
+		t.Notify(err)
+	}()
+	if err != nil {
+		return
+	}
+
+	err = t.Execute()
+	if err != nil {
+		return
+	}
+	err = t.PostExecute()
+}
+
+func (sched *TaskScheduler) registerLinkLoop() {
+	defer sched.wg.Done()
+	for {
+		select {
+		case <-sched.ctx.Done():
+			return
+		case <-sched.RegisterLinkTaskQueue.Chan():
+			if !sched.RegisterLinkTaskQueue.Empty() {
+				t := sched.scheduleRegisterLinkTask()
+				go sched.processTask(t, sched.RegisterLinkTaskQueue)
+			}
+		}
+	}
+}
+
+func (sched *TaskScheduler) registerNodeLoop() {
+	defer sched.wg.Done()
+	for {
+		select {
+		case <-sched.ctx.Done():
+			return
+		case <-sched.RegisterNodeTaskQueue.Chan():
+			if !sched.RegisterNodeTaskQueue.Empty() {
+				t := sched.scheduleRegisterNodeTask()
+				go sched.processTask(t, sched.RegisterNodeTaskQueue)
+			}
+		}
+	}
+}
+
+func (sched *TaskScheduler) invalidateCollectionMetaCacheLoop() {
+	defer sched.wg.Done()
+	for {
+		select {
+		case <-sched.ctx.Done():
+			return
+		case <-sched.InvalidateCollectionMetaCacheTaskQueue.Chan():
+			if !sched.InvalidateCollectionMetaCacheTaskQueue.Empty() {
+				t := sched.scheduleInvalidateCollectionMetaCacheTask()
+				go sched.processTask(t, sched.InvalidateCollectionMetaCacheTaskQueue)
+			}
+		}
+	}
+}
+
+func (sched *TaskScheduler) Start() {
+	sched.wg.Add(1)
+	go sched.registerLinkLoop()
+
+	sched.wg.Add(1)
+	go sched.registerNodeLoop()
+
+	sched.wg.Add(1)
+	go sched.invalidateCollectionMetaCacheLoop()
+}
+
+func (sched *TaskScheduler) Close() {
+	sched.cancel()
+	sched.wg.Wait()
+}
--- a/internal/proxyservice/utils.go
+++ b/internal/proxyservice/utils.go
@ -0,0 +1,21 @@
+package proxyservice
+
+import (
+	"reflect"
+)
+
+// what if golang support generic programming
+func SliceContain(s interface{}, item interface{}) bool {
+	ss := reflect.ValueOf(s)
+	if ss.Kind() != reflect.Slice {
+		panic("SliceContain expect a slice")
+	}
+
+	for i := 0; i < ss.Len(); i++ {
+		if ss.Index(i).Interface() == item {
+			return true
+		}
+	}
+
+	return false
+}
--- a/tests/python/requirements.txt
+++ b/tests/python/requirements.txt
@ -4,5 +4,5 @@ numpy==1.18.1
 pytest==5.3.4
 pytest-cov==2.8.1
 pytest-timeout==1.3.4
-pymilvus-distributed==0.0.16
+pymilvus-distributed==0.0.17
 sklearn==0.0