Add load index client in query node

Signed-off-by: xige-16 <xi.ge@zilliz.com>

internal/master/segment_manager.go

@@ -50,9 +50,9 @@ func (segMgr *SegmentManager) HandleQueryNodeMsgPack(msgPack *msgstream.MsgPack)
 	segMgr.mu.Lock()
 	defer segMgr.mu.Unlock()
 	for _, msg := range msgPack.Msgs {
-		statsMsg, ok := msg.(*msgstream.QueryNodeSegStatsMsg)
+		statsMsg, ok := msg.(*msgstream.QueryNodeStatsMsg)
 		if !ok {
-			return errors.Errorf("Type of message is not QueryNodeSegStatsMsg")
+			return errors.Errorf("Type of message is not QueryNodeStatsMsg")
 		}
 
 		for _, segStat := range statsMsg.GetSegStats() {

internal/master/segment_manager_test.go

@@ -177,8 +177,8 @@ func TestSegmentManager_SegmentStats(t *testing.T) {
 		OpenTime:     ts,
 	})
 	assert.Nil(t, err)
-	stats := internalpb.QueryNodeSegStats{
-		MsgType: internalpb.MsgType_kQueryNodeSegStats,
+	stats := internalpb.QueryNodeStats{
+		MsgType: internalpb.MsgType_kQueryNodeStats,
 		PeerID:  1,
 		SegStats: []*internalpb.SegmentStats{
 			{SegmentID: 100, MemorySize: 2500000, NumRows: 25000, RecentlyModified: true},
@@ -189,9 +189,9 @@ func TestSegmentManager_SegmentStats(t *testing.T) {
 		EndTimestamp:   0,
 		HashValues:     []uint32{1},
 	}
-	msg := msgstream.QueryNodeSegStatsMsg{
-		QueryNodeSegStats: stats,
-		BaseMsg:           baseMsg,
+	msg := msgstream.QueryNodeStatsMsg{
+		QueryNodeStats: stats,
+		BaseMsg:        baseMsg,
 	}
 
 	var tsMsg msgstream.TsMsg = &msg
@@ -350,9 +350,9 @@ func TestSegmentManager_RPC(t *testing.T) {
 		BeginTs: 102,
 		EndTs:   104,
 		Msgs: []msgstream.TsMsg{
-			&msgstream.QueryNodeSegStatsMsg{
-				QueryNodeSegStats: internalpb.QueryNodeSegStats{
-					MsgType: internalpb.MsgType_kQueryNodeSegStats,
+			&msgstream.QueryNodeStatsMsg{
+				QueryNodeStats: internalpb.QueryNodeStats{
+					MsgType: internalpb.MsgType_kQueryNodeStats,
 					PeerID:  1,
 					SegStats: []*internalpb.SegmentStats{
 						{SegmentID: segID, MemorySize: 600000000, NumRows: 1000000, RecentlyModified: true},

internal/msgstream/msg.go

@@ -221,19 +221,19 @@ func (tst *TimeTickMsg) Unmarshal(input []byte) (TsMsg, error) {
 	return timeTick, nil
 }
 
-/////////////////////////////////////////QueryNodeSegStats//////////////////////////////////////////
-type QueryNodeSegStatsMsg struct {
+/////////////////////////////////////////QueryNodeStats//////////////////////////////////////////
+type QueryNodeStatsMsg struct {
 	BaseMsg
-	internalPb.QueryNodeSegStats
+	internalPb.QueryNodeStats
 }
 
-func (qs *QueryNodeSegStatsMsg) Type() MsgType {
+func (qs *QueryNodeStatsMsg) Type() MsgType {
 	return qs.MsgType
 }
 
-func (qs *QueryNodeSegStatsMsg) Marshal(input TsMsg) ([]byte, error) {
-	queryNodeSegStatsTask := input.(*QueryNodeSegStatsMsg)
-	queryNodeSegStats := &queryNodeSegStatsTask.QueryNodeSegStats
+func (qs *QueryNodeStatsMsg) Marshal(input TsMsg) ([]byte, error) {
+	queryNodeSegStatsTask := input.(*QueryNodeStatsMsg)
+	queryNodeSegStats := &queryNodeSegStatsTask.QueryNodeStats
 	mb, err := proto.Marshal(queryNodeSegStats)
 	if err != nil {
 		return nil, err
@@ -241,13 +241,13 @@ func (qs *QueryNodeSegStatsMsg) Marshal(input TsMsg) ([]byte, error) {
 	return mb, nil
 }
 
-func (qs *QueryNodeSegStatsMsg) Unmarshal(input []byte) (TsMsg, error) {
-	queryNodeSegStats := internalPb.QueryNodeSegStats{}
+func (qs *QueryNodeStatsMsg) Unmarshal(input []byte) (TsMsg, error) {
+	queryNodeSegStats := internalPb.QueryNodeStats{}
 	err := proto.Unmarshal(input, &queryNodeSegStats)
 	if err != nil {
 		return nil, err
 	}
-	queryNodeSegStatsMsg := &QueryNodeSegStatsMsg{QueryNodeSegStats: queryNodeSegStats}
+	queryNodeSegStatsMsg := &QueryNodeStatsMsg{QueryNodeStats: queryNodeSegStats}
 
 	return queryNodeSegStatsMsg, nil
 }
@@ -591,3 +591,34 @@ func (sc *ShowPartitionMsg) Unmarshal(input []byte) (TsMsg, error) {
 
 	return showPartitionMsg, nil
 }
+
+/////////////////////////////////////////LoadIndex//////////////////////////////////////////
+type LoadIndexMsg struct {
+	BaseMsg
+	internalPb.LoadIndex
+}
+
+func (lim *LoadIndexMsg) Type() MsgType {
+	return lim.MsgType
+}
+
+func (lim *LoadIndexMsg) Marshal(input TsMsg) ([]byte, error) {
+	loadIndexMsg := input.(*LoadIndexMsg)
+	loadIndexRequest := &loadIndexMsg.LoadIndex
+	mb, err := proto.Marshal(loadIndexRequest)
+	if err != nil {
+		return nil, err
+	}
+	return mb, nil
+}
+
+func (lim *LoadIndexMsg) Unmarshal(input []byte) (TsMsg, error) {
+	loadIndexRequest := internalPb.LoadIndex{}
+	err := proto.Unmarshal(input, &loadIndexRequest)
+	if err != nil {
+		return nil, err
+	}
+	loadIndexMsg := &LoadIndexMsg{LoadIndex: loadIndexRequest}
+
+	return loadIndexMsg, nil
+}

internal/msgstream/msgstream_test.go

@@ -115,14 +115,14 @@ func getTsMsg(msgType MsgType, reqID UniqueID, hashValue uint32) TsMsg {
 			TimeTickMsg: timeTickResult,
 		}
 		return timeTickMsg
-	case internalPb.MsgType_kQueryNodeSegStats:
-		queryNodeSegStats := internalPb.QueryNodeSegStats{
-			MsgType: internalPb.MsgType_kQueryNodeSegStats,
+	case internalPb.MsgType_kQueryNodeStats:
+		queryNodeSegStats := internalPb.QueryNodeStats{
+			MsgType: internalPb.MsgType_kQueryNodeStats,
 			PeerID:  reqID,
 		}
-		queryNodeSegStatsMsg := &QueryNodeSegStatsMsg{
-			BaseMsg:           baseMsg,
-			QueryNodeSegStats: queryNodeSegStats,
+		queryNodeSegStatsMsg := &QueryNodeStatsMsg{
+			BaseMsg:        baseMsg,
+			QueryNodeStats: queryNodeSegStats,
 		}
 		return queryNodeSegStatsMsg
 	}
@@ -473,7 +473,7 @@ func TestStream_PulsarMsgStream_DefaultRepackFunc(t *testing.T) {
 	msgPack.Msgs = append(msgPack.Msgs, getTsMsg(internalPb.MsgType_kTimeTick, 1, 1))
 	msgPack.Msgs = append(msgPack.Msgs, getTsMsg(internalPb.MsgType_kSearch, 2, 2))
 	msgPack.Msgs = append(msgPack.Msgs, getTsMsg(internalPb.MsgType_kSearchResult, 3, 3))
-	msgPack.Msgs = append(msgPack.Msgs, getTsMsg(internalPb.MsgType_kQueryNodeSegStats, 4, 4))
+	msgPack.Msgs = append(msgPack.Msgs, getTsMsg(internalPb.MsgType_kQueryNodeStats, 4, 4))
 
 	inputStream := NewPulsarMsgStream(context.Background(), 100)
 	inputStream.SetPulsarClient(pulsarAddress)

internal/msgstream/unmarshal.go

@@ -35,14 +35,14 @@ func (dispatcher *UnmarshalDispatcher) addDefaultMsgTemplates() {
 	createPartitionMsg := CreatePartitionMsg{}
 	dropPartitionMsg := DropPartitionMsg{}
 
-	queryNodeSegStatsMsg := QueryNodeSegStatsMsg{}
+	queryNodeSegStatsMsg := QueryNodeStatsMsg{}
 	dispatcher.tempMap = make(map[internalPb.MsgType]UnmarshalFunc)
 	dispatcher.tempMap[internalPb.MsgType_kInsert] = insertMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kDelete] = deleteMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kSearch] = searchMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kSearchResult] = searchResultMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kTimeTick] = timeTickMsg.Unmarshal
-	dispatcher.tempMap[internalPb.MsgType_kQueryNodeSegStats] = queryNodeSegStatsMsg.Unmarshal
+	dispatcher.tempMap[internalPb.MsgType_kQueryNodeStats] = queryNodeSegStatsMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kCreateCollection] = createCollectionMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kDropCollection] = dropCollectionMsg.Unmarshal
 	dispatcher.tempMap[internalPb.MsgType_kCreatePartition] = createPartitionMsg.Unmarshal

internal/proto/internal_msg.proto

@@ -33,7 +33,8 @@ enum MsgType {
 
     /* System Control */
     kTimeTick = 1200;
-    kQueryNodeSegStats = 1201;
+    kQueryNodeStats = 1201;
+    kLoadIndex = 1202;
 
 }
 
@@ -276,6 +277,24 @@ message Key2SegMsg {
     repeated Key2Seg key2seg = 2;
 }
 
+message LoadIndex {
+    MsgType msg_type = 1;
+    int64 segmentID = 2;
+    int64 fieldID = 3;
+    repeated string index_paths = 4;
+}
+
+message IndexStats {
+    repeated common.KeyValuePair index_params = 1;
+    int64 num_related_segments = 2;
+}
+
+message FieldStats {
+    int64 collectionID = 1;
+    int64 fieldID = 2;
+    repeated IndexStats index_stats = 3;
+}
+
 message SegmentStats {
     int64 segmentID = 1;
     int64 memory_size = 2;
@@ -283,8 +302,9 @@ message SegmentStats {
     bool recently_modified = 4;
 }
 
-message QueryNodeSegStats {
+message QueryNodeStats {
     MsgType msg_type = 1;
     int64 peerID = 2;
     repeated SegmentStats seg_stats = 3;
+    repeated FieldStats field_stats = 4;
 }

internal/proto/internalpb/internal_msg.pb.go

@@ -46,8 +46,9 @@ const (
 	MsgType_kSearch       MsgType = 500
 	MsgType_kSearchResult MsgType = 501
 	// System Control
-	MsgType_kTimeTick          MsgType = 1200
-	MsgType_kQueryNodeSegStats MsgType = 1201
+	MsgType_kTimeTick       MsgType = 1200
+	MsgType_kQueryNodeStats MsgType = 1201
+	MsgType_kLoadIndex      MsgType = 1202
 )
 
 var MsgType_name = map[int32]string{
@@ -68,7 +69,8 @@ var MsgType_name = map[int32]string{
 	500:  "kSearch",
 	501:  "kSearchResult",
 	1200: "kTimeTick",
-	1201: "kQueryNodeSegStats",
+	1201: "kQueryNodeStats",
+	1202: "kLoadIndex",
 }
 
 var MsgType_value = map[string]int32{
@@ -89,7 +91,8 @@ var MsgType_value = map[string]int32{
 	"kSearch":             500,
 	"kSearchResult":       501,
 	"kTimeTick":           1200,
-	"kQueryNodeSegStats":  1201,
+	"kQueryNodeStats":     1201,
+	"kLoadIndex":          1202,
 }
 
 func (x MsgType) String() string {
@@ -1979,6 +1982,171 @@ func (m *Key2SegMsg) GetKey2Seg() []*Key2Seg {
 	return nil
 }
 
+type LoadIndex struct {
+	MsgType              MsgType  `protobuf:"varint,1,opt,name=msg_type,json=msgType,proto3,enum=milvus.proto.internal.MsgType" json:"msg_type,omitempty"`
+	SegmentID            int64    `protobuf:"varint,2,opt,name=segmentID,proto3" json:"segmentID,omitempty"`
+	FieldID              int64    `protobuf:"varint,3,opt,name=fieldID,proto3" json:"fieldID,omitempty"`
+	IndexPaths           []string `protobuf:"bytes,4,rep,name=index_paths,json=indexPaths,proto3" json:"index_paths,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *LoadIndex) Reset()         { *m = LoadIndex{} }
+func (m *LoadIndex) String() string { return proto.CompactTextString(m) }
+func (*LoadIndex) ProtoMessage()    {}
+func (*LoadIndex) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7eb37f6b80b23116, []int{26}
+}
+
+func (m *LoadIndex) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LoadIndex.Unmarshal(m, b)
+}
+func (m *LoadIndex) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LoadIndex.Marshal(b, m, deterministic)
+}
+func (m *LoadIndex) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LoadIndex.Merge(m, src)
+}
+func (m *LoadIndex) XXX_Size() int {
+	return xxx_messageInfo_LoadIndex.Size(m)
+}
+func (m *LoadIndex) XXX_DiscardUnknown() {
+	xxx_messageInfo_LoadIndex.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LoadIndex proto.InternalMessageInfo
+
+func (m *LoadIndex) GetMsgType() MsgType {
+	if m != nil {
+		return m.MsgType
+	}
+	return MsgType_kNone
+}
+
+func (m *LoadIndex) GetSegmentID() int64 {
+	if m != nil {
+		return m.SegmentID
+	}
+	return 0
+}
+
+func (m *LoadIndex) GetFieldID() int64 {
+	if m != nil {
+		return m.FieldID
+	}
+	return 0
+}
+
+func (m *LoadIndex) GetIndexPaths() []string {
+	if m != nil {
+		return m.IndexPaths
+	}
+	return nil
+}
+
+type IndexStats struct {
+	IndexParams          []*commonpb.KeyValuePair `protobuf:"bytes,1,rep,name=index_params,json=indexParams,proto3" json:"index_params,omitempty"`
+	NumRelatedSegments   int64                    `protobuf:"varint,2,opt,name=num_related_segments,json=numRelatedSegments,proto3" json:"num_related_segments,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                 `json:"-"`
+	XXX_unrecognized     []byte                   `json:"-"`
+	XXX_sizecache        int32                    `json:"-"`
+}
+
+func (m *IndexStats) Reset()         { *m = IndexStats{} }
+func (m *IndexStats) String() string { return proto.CompactTextString(m) }
+func (*IndexStats) ProtoMessage()    {}
+func (*IndexStats) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7eb37f6b80b23116, []int{27}
+}
+
+func (m *IndexStats) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_IndexStats.Unmarshal(m, b)
+}
+func (m *IndexStats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_IndexStats.Marshal(b, m, deterministic)
+}
+func (m *IndexStats) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_IndexStats.Merge(m, src)
+}
+func (m *IndexStats) XXX_Size() int {
+	return xxx_messageInfo_IndexStats.Size(m)
+}
+func (m *IndexStats) XXX_DiscardUnknown() {
+	xxx_messageInfo_IndexStats.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_IndexStats proto.InternalMessageInfo
+
+func (m *IndexStats) GetIndexParams() []*commonpb.KeyValuePair {
+	if m != nil {
+		return m.IndexParams
+	}
+	return nil
+}
+
+func (m *IndexStats) GetNumRelatedSegments() int64 {
+	if m != nil {
+		return m.NumRelatedSegments
+	}
+	return 0
+}
+
+type FieldStats struct {
+	CollectionID         int64         `protobuf:"varint,1,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
+	FieldID              int64         `protobuf:"varint,2,opt,name=fieldID,proto3" json:"fieldID,omitempty"`
+	IndexStats           []*IndexStats `protobuf:"bytes,3,rep,name=index_stats,json=indexStats,proto3" json:"index_stats,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
+}
+
+func (m *FieldStats) Reset()         { *m = FieldStats{} }
+func (m *FieldStats) String() string { return proto.CompactTextString(m) }
+func (*FieldStats) ProtoMessage()    {}
+func (*FieldStats) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7eb37f6b80b23116, []int{28}
+}
+
+func (m *FieldStats) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FieldStats.Unmarshal(m, b)
+}
+func (m *FieldStats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FieldStats.Marshal(b, m, deterministic)
+}
+func (m *FieldStats) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FieldStats.Merge(m, src)
+}
+func (m *FieldStats) XXX_Size() int {
+	return xxx_messageInfo_FieldStats.Size(m)
+}
+func (m *FieldStats) XXX_DiscardUnknown() {
+	xxx_messageInfo_FieldStats.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FieldStats proto.InternalMessageInfo
+
+func (m *FieldStats) GetCollectionID() int64 {
+	if m != nil {
+		return m.CollectionID
+	}
+	return 0
+}
+
+func (m *FieldStats) GetFieldID() int64 {
+	if m != nil {
+		return m.FieldID
+	}
+	return 0
+}
+
+func (m *FieldStats) GetIndexStats() []*IndexStats {
+	if m != nil {
+		return m.IndexStats
+	}
+	return nil
+}
+
 type SegmentStats struct {
 	SegmentID            int64    `protobuf:"varint,1,opt,name=segmentID,proto3" json:"segmentID,omitempty"`
 	MemorySize           int64    `protobuf:"varint,2,opt,name=memory_size,json=memorySize,proto3" json:"memory_size,omitempty"`
@@ -1993,7 +2161,7 @@ func (m *SegmentStats) Reset()         { *m = SegmentStats{} }
 func (m *SegmentStats) String() string { return proto.CompactTextString(m) }
 func (*SegmentStats) ProtoMessage()    {}
 func (*SegmentStats) Descriptor() ([]byte, []int) {
-	return fileDescriptor_7eb37f6b80b23116, []int{26}
+	return fileDescriptor_7eb37f6b80b23116, []int{29}
 }
 
 func (m *SegmentStats) XXX_Unmarshal(b []byte) error {
@@ -2042,61 +2210,69 @@ func (m *SegmentStats) GetRecentlyModified() bool {
 	return false
 }
 
-type QueryNodeSegStats struct {
+type QueryNodeStats struct {
 	MsgType              MsgType         `protobuf:"varint,1,opt,name=msg_type,json=msgType,proto3,enum=milvus.proto.internal.MsgType" json:"msg_type,omitempty"`
 	PeerID               int64           `protobuf:"varint,2,opt,name=peerID,proto3" json:"peerID,omitempty"`
 	SegStats             []*SegmentStats `protobuf:"bytes,3,rep,name=seg_stats,json=segStats,proto3" json:"seg_stats,omitempty"`
+	FieldStats           []*FieldStats   `protobuf:"bytes,4,rep,name=field_stats,json=fieldStats,proto3" json:"field_stats,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
 	XXX_unrecognized     []byte          `json:"-"`
 	XXX_sizecache        int32           `json:"-"`
 }
 
-func (m *QueryNodeSegStats) Reset()         { *m = QueryNodeSegStats{} }
-func (m *QueryNodeSegStats) String() string { return proto.CompactTextString(m) }
-func (*QueryNodeSegStats) ProtoMessage()    {}
-func (*QueryNodeSegStats) Descriptor() ([]byte, []int) {
-	return fileDescriptor_7eb37f6b80b23116, []int{27}
+func (m *QueryNodeStats) Reset()         { *m = QueryNodeStats{} }
+func (m *QueryNodeStats) String() string { return proto.CompactTextString(m) }
+func (*QueryNodeStats) ProtoMessage()    {}
+func (*QueryNodeStats) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7eb37f6b80b23116, []int{30}
 }
 
-func (m *QueryNodeSegStats) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_QueryNodeSegStats.Unmarshal(m, b)
+func (m *QueryNodeStats) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_QueryNodeStats.Unmarshal(m, b)
 }
-func (m *QueryNodeSegStats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_QueryNodeSegStats.Marshal(b, m, deterministic)
+func (m *QueryNodeStats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_QueryNodeStats.Marshal(b, m, deterministic)
 }
-func (m *QueryNodeSegStats) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_QueryNodeSegStats.Merge(m, src)
+func (m *QueryNodeStats) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_QueryNodeStats.Merge(m, src)
 }
-func (m *QueryNodeSegStats) XXX_Size() int {
-	return xxx_messageInfo_QueryNodeSegStats.Size(m)
+func (m *QueryNodeStats) XXX_Size() int {
+	return xxx_messageInfo_QueryNodeStats.Size(m)
 }
-func (m *QueryNodeSegStats) XXX_DiscardUnknown() {
-	xxx_messageInfo_QueryNodeSegStats.DiscardUnknown(m)
+func (m *QueryNodeStats) XXX_DiscardUnknown() {
+	xxx_messageInfo_QueryNodeStats.DiscardUnknown(m)
 }
 
-var xxx_messageInfo_QueryNodeSegStats proto.InternalMessageInfo
+var xxx_messageInfo_QueryNodeStats proto.InternalMessageInfo
 
-func (m *QueryNodeSegStats) GetMsgType() MsgType {
+func (m *QueryNodeStats) GetMsgType() MsgType {
 	if m != nil {
 		return m.MsgType
 	}
 	return MsgType_kNone
 }
 
-func (m *QueryNodeSegStats) GetPeerID() int64 {
+func (m *QueryNodeStats) GetPeerID() int64 {
 	if m != nil {
 		return m.PeerID
 	}
 	return 0
 }
 
-func (m *QueryNodeSegStats) GetSegStats() []*SegmentStats {
+func (m *QueryNodeStats) GetSegStats() []*SegmentStats {
 	if m != nil {
 		return m.SegStats
 	}
 	return nil
 }
 
+func (m *QueryNodeStats) GetFieldStats() []*FieldStats {
+	if m != nil {
+		return m.FieldStats
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterEnum("milvus.proto.internal.MsgType", MsgType_name, MsgType_value)
 	proto.RegisterEnum("milvus.proto.internal.PeerRole", PeerRole_name, PeerRole_value)
@@ -2126,108 +2302,122 @@ func init() {
 	proto.RegisterType((*TimeTickMsg)(nil), "milvus.proto.internal.TimeTickMsg")
 	proto.RegisterType((*Key2Seg)(nil), "milvus.proto.internal.Key2Seg")
 	proto.RegisterType((*Key2SegMsg)(nil), "milvus.proto.internal.Key2SegMsg")
+	proto.RegisterType((*LoadIndex)(nil), "milvus.proto.internal.LoadIndex")
+	proto.RegisterType((*IndexStats)(nil), "milvus.proto.internal.IndexStats")
+	proto.RegisterType((*FieldStats)(nil), "milvus.proto.internal.FieldStats")
 	proto.RegisterType((*SegmentStats)(nil), "milvus.proto.internal.SegmentStats")
-	proto.RegisterType((*QueryNodeSegStats)(nil), "milvus.proto.internal.QueryNodeSegStats")
+	proto.RegisterType((*QueryNodeStats)(nil), "milvus.proto.internal.QueryNodeStats")
 }
 
 func init() { proto.RegisterFile("internal_msg.proto", fileDescriptor_7eb37f6b80b23116) }
 
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+	0x52, 0xd9, 0xe2, 0x5e, 0x93, 0xc2, 0x7e, 0xa8, 0xc3, 0x86, 0x88, 0x6a, 0x9f, 0x71, 0xf6, 0xe2,
+	0x9c, 0xfd, 0x55, 0x83, 0xf5, 0x77, 0x5d, 0x7e, 0x93, 0x94, 0xdd, 0xec, 0xe1, 0xbf, 0x0c, 0xb6,
+	0xfa, 0x5f, 0x83, 0xfd, 0x48, 0x83, 0x4e, 0x16, 0xef, 0x3e, 0x1d, 0x88, 0xc5, 0x95, 0x26, 0x62,
+	0xdd, 0xab, 0x8b, 0xf6, 0x86, 0x83, 0xfb, 0xdf, 0x75, 0x58, 0xed, 0x85, 0x1c, 0x59, 0xf2, 0xd2,
+	0x90, 0xbe, 0x75, 0xd9, 0x63, 0x95, 0xc3, 0x5c, 0xf0, 0xe5, 0x85, 0x32, 0x19, 0xc1, 0x1b, 0xc7,
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+	0xf2, 0x35, 0x58, 0x61, 0xd1, 0xb9, 0x33, 0x74, 0x13, 0xb7, 0x03, 0xf2, 0x91, 0xbd, 0xe4, 0x35,
+	0x59, 0x67, 0xd1, 0x79, 0xd7, 0x4d, 0x5c, 0xeb, 0xb9, 0x0e, 0xab, 0x5d, 0xf4, 0x31, 0xc1, 0xff,
+	0x3d, 0xe9, 0x25, 0xc6, 0x2a, 0x4b, 0x18, 0xab, 0x2e, 0x63, 0xac, 0x76, 0x89, 0xb1, 0xfb, 0xd0,
+	0x8a, 0x19, 0x0d, 0x5c, 0x36, 0x75, 0x3c, 0x9c, 0xf2, 0x4e, 0x5d, 0xf2, 0xd6, 0x4c, 0x6d, 0x8f,
+	0x70, 0xca, 0xad, 0x8f, 0x35, 0x58, 0xed, 0xa3, 0xcb, 0x06, 0xe3, 0x97, 0x46, 0xc3, 0x8c, 0xff,
+	0x46, 0xd9, 0xff, 0xe5, 0x6f, 0xe8, 0x2f, 0x82, 0xc9, 0x90, 0x4f, 0xfc, 0xc4, 0x29, 0xc8, 0x51,
+	0x04, 0xac, 0x29, 0xfb, 0x41, 0x4e, 0xd1, 0x2e, 0x54, 0xcf, 0x26, 0xc8, 0xa6, 0x57, 0x67, 0x13,
+	0x6a, 0x9c, 0xf5, 0x67, 0x0d, 0xcc, 0xfe, 0x94, 0x1f, 0x44, 0xe1, 0x29, 0x1d, 0xbd, 0x72, 0xc8,
+	0x09, 0x54, 0xa4, 0x5e, 0xd5, 0x2d, 0x63, 0xbb, 0x61, 0xcb, 0xb6, 0xd0, 0xd2, 0xc3, 0xa9, 0x13,
+	0x33, 0x3c, 0xa5, 0x4f, 0x51, 0xa9, 0xdd, 0xb0, 0x9b, 0x1e, 0x4e, 0x8f, 0x52, 0x93, 0xf5, 0x81,
+	0x0e, 0xad, 0x4c, 0x4b, 0xc1, 0xcf, 0x75, 0x00, 0x15, 0x39, 0xb4, 0xfe, 0xe2, 0x39, 0xf4, 0xfc,
+	0x4c, 0x69, 0x71, 0x1c, 0xbd, 0x0f, 0x2d, 0x29, 0x87, 0x13, 0x46, 0x43, 0xcc, 0xd5, 0x6d, 0x4a,
+	0xdb, 0x63, 0x69, 0x2a, 0x13, 0x55, 0x7b, 0x91, 0x2d, 0x52, 0x9f, 0xbf, 0x45, 0x08, 0x54, 0xc6,
+	0x34, 0x51, 0x71, 0xa5, 0x65, 0xcb, 0xb6, 0xf5, 0x43, 0x68, 0x1e, 0xd3, 0x00, 0x8f, 0xe9, 0xc0,
+	0x3b, 0xe4, 0xa3, 0xeb, 0xd0, 0x55, 0x14, 0x71, 0xf4, 0x52, 0x11, 0x67, 0xe9, 0x0d, 0x63, 0xfd,
+	0x5c, 0x83, 0xfa, 0x23, 0x9c, 0xee, 0xf5, 0x71, 0x24, 0xb9, 0x13, 0xf1, 0x2c, 0x2b, 0xac, 0xc8,
+	0x0e, 0xb9, 0x07, 0xcd, 0x99, 0x13, 0x9c, 0x4e, 0x0e, 0xc5, 0x01, 0xbe, 0xe2, 0x0a, 0xbb, 0x0b,
+	0x2b, 0x94, 0x3b, 0x4f, 0x5c, 0x9f, 0x0e, 0x25, 0xf7, 0x2b, 0x76, 0x9d, 0xf2, 0xf7, 0x44, 0x57,
+	0xc4, 0x8e, 0x3c, 0x64, 0xab, 0x9d, 0x66, 0xd8, 0x33, 0x16, 0xeb, 0x7d, 0x80, 0xd4, 0x35, 0x41,
+	0x4d, 0xae, 0xac, 0x36, 0xab, 0xec, 0xd7, 0xa1, 0xee, 0xe1, 0x74, 0x8f, 0xe3, 0xa8, 0xa3, 0xcb,
+	0xc0, 0xbb, 0x88, 0xaf, 0x74, 0x26, 0x3b, 0x1b, 0x6e, 0xfd, 0x52, 0x83, 0xc6, 0x77, 0x23, 0x77,
+	0xd8, 0x0b, 0x87, 0xf8, 0xf4, 0x3a, 0xc4, 0x97, 0xae, 0x22, 0xfd, 0xe2, 0x55, 0xd4, 0x81, 0xfa,
+	0x29, 0x45, 0x7f, 0x58, 0x1c, 0xc0, 0xb4, 0x2b, 0x88, 0xa5, 0x62, 0x6d, 0x27, 0x76, 0x93, 0x31,
+	0x97, 0xc5, 0x99, 0x86, 0x0d, 0xd2, 0x74, 0x24, 0x2c, 0xd6, 0x73, 0x0d, 0x40, 0x7a, 0x27, 0xf6,
+	0x38, 0x27, 0x5d, 0x68, 0x65, 0xe3, 0x99, 0x1b, 0xf0, 0x8e, 0x26, 0xf1, 0xde, 0x9f, 0x7b, 0x2a,
+	0x1e, 0xe1, 0xf4, 0x3d, 0xd7, 0x9f, 0xe0, 0x91, 0x4b, 0x99, 0xdd, 0x4c, 0xe7, 0x14, 0x7f, 0x91,
+	0xaf, 0xc0, 0x46, 0x38, 0x09, 0x1c, 0x86, 0xbe, 0x9b, 0xe0, 0xd0, 0x49, 0x1d, 0xe5, 0xa9, 0xe3,
+	0x24, 0x9c, 0x04, 0xb6, 0xfa, 0xd4, 0x4f, 0xbf, 0x58, 0x3f, 0xd2, 0x00, 0xbe, 0x25, 0x7c, 0x56,
+	0x6e, 0x5c, 0x7c, 0xda, 0x6b, 0x73, 0x9e, 0xf6, 0x33, 0xa0, 0xf5, 0x32, 0xe8, 0xfd, 0x0c, 0xb4,
+	0x38, 0xaf, 0x3c, 0xad, 0x0c, 0xde, 0x5f, 0x40, 0x75, 0x01, 0x3e, 0xe5, 0x45, 0xb6, 0xad, 0x9f,
+	0xa9, 0x62, 0xaa, 0xf0, 0x4e, 0xb9, 0x54, 0x52, 0x40, 0xbb, 0xa8, 0xc0, 0x3d, 0x68, 0x06, 0x18,
+	0x44, 0x6c, 0xea, 0x70, 0xfa, 0x0c, 0xb3, 0x0d, 0xac, 0x4c, 0x7d, 0xfa, 0x0c, 0xc5, 0x16, 0x95,
+	0x94, 0x44, 0xe7, 0x3c, 0xd3, 0x48, 0xd0, 0x10, 0x9d, 0x73, 0xf2, 0x25, 0xb8, 0xc5, 0x70, 0x80,
+	0x61, 0xe2, 0x4f, 0x9d, 0x20, 0x1a, 0xd2, 0x53, 0x8a, 0xd9, 0x36, 0x36, 0xb3, 0x0f, 0x87, 0xa9,
+	0xdd, 0xfa, 0x8b, 0x06, 0xed, 0xef, 0x65, 0x81, 0x43, 0x79, 0xf6, 0x12, 0xce, 0xf3, 0x37, 0x24,
+	0xd8, 0x12, 0x7f, 0x4b, 0x2a, 0xab, 0x39, 0x49, 0xf6, 0x0a, 0xc7, 0x91, 0x72, 0x6a, 0x1f, 0x9a,
+	0x52, 0x8e, 0x74, 0x8e, 0xca, 0x52, 0x0d, 0x0a, 0xe5, 0x6d, 0x38, 0xcd, 0xdb, 0x6f, 0xff, 0x5b,
+	0x87, 0x7a, 0xea, 0x32, 0x69, 0x40, 0xd5, 0x7b, 0x1c, 0x85, 0x68, 0xbe, 0x46, 0x36, 0xe1, 0x96,
+	0x77, 0xb1, 0x3a, 0x68, 0x0e, 0xc9, 0x3a, 0xac, 0x79, 0xe5, 0xc2, 0x99, 0x89, 0x84, 0x40, 0xdb,
+	0x2b, 0xd5, 0x8d, 0xcc, 0x53, 0x72, 0x07, 0xd6, 0xbd, 0xcb, 0xa5, 0x15, 0x53, 0x9c, 0x7e, 0xd3,
+	0x2b, 0x57, 0x1f, 0xb8, 0x39, 0x96, 0x53, 0x7c, 0x1b, 0x93, 0xfc, 0x1a, 0xe5, 0x26, 0x25, 0x9b,
+	0x60, 0x7a, 0x17, 0x8a, 0x00, 0xe6, 0xef, 0x34, 0xb2, 0x0e, 0x6d, 0xaf, 0x94, 0xe5, 0x9a, 0xbf,
+	0xd7, 0x08, 0x81, 0x55, 0x6f, 0x36, 0x8d, 0x33, 0xff, 0xa0, 0x91, 0x3b, 0x40, 0xbc, 0x4b, 0xd9,
+	0x8e, 0xf9, 0x47, 0x8d, 0x6c, 0xc0, 0x9a, 0x57, 0x4a, 0x0a, 0xb8, 0xf9, 0x27, 0x8d, 0xb4, 0xa0,
+	0xee, 0xa9, 0x97, 0xb3, 0xf9, 0x63, 0x43, 0xf6, 0xd4, 0x93, 0xce, 0xfc, 0x89, 0xea, 0xa9, 0xdb,
+	0xd0, 0xfc, 0xd8, 0x90, 0x8b, 0xcd, 0xde, 0x8d, 0xe6, 0x3f, 0x0d, 0xd2, 0x86, 0x86, 0x97, 0xc5,
+	0x7f, 0xf3, 0xd7, 0x0d, 0xb9, 0x46, 0x79, 0x0b, 0x99, 0x1f, 0x36, 0xc8, 0x1a, 0x80, 0x97, 0x87,
+	0x2a, 0xf3, 0x37, 0x8d, 0xb7, 0xdf, 0x81, 0x95, 0xac, 0xea, 0x4e, 0x00, 0x6a, 0x87, 0x2e, 0x4f,
+	0x90, 0x99, 0xaf, 0x89, 0xb6, 0x8d, 0xee, 0x10, 0x99, 0xa9, 0x89, 0xf6, 0xf7, 0x19, 0x15, 0x76,
+	0x5d, 0x28, 0x74, 0x24, 0x2e, 0x3c, 0xd3, 0xd8, 0xef, 0xfe, 0x60, 0x7f, 0x44, 0x93, 0xf1, 0xe4,
+	0x44, 0x84, 0x8a, 0xdd, 0x67, 0xd4, 0xf7, 0xe9, 0xb3, 0x04, 0x07, 0xe3, 0x5d, 0x25, 0xff, 0x97,
+	0x87, 0x94, 0x27, 0x8c, 0x9e, 0x4c, 0x12, 0x1c, 0xee, 0x66, 0x9b, 0x60, 0x57, 0xee, 0x89, 0xbc,
+	0x1b, 0x9f, 0x9c, 0xd4, 0xa4, 0xe5, 0xe1, 0x7f, 0x02, 0x00, 0x00, 0xff, 0xff, 0x9a, 0xfa, 0x64,
+	0x88, 0xe6, 0x1a, 0x00, 0x00,
 }

internal/querynode/client/client.go

@@ -0,0 +1,50 @@
+package client
+
+import (
+	"context"
+
+	"github.com/zilliztech/milvus-distributed/internal/msgstream"
+	internalPb "github.com/zilliztech/milvus-distributed/internal/proto/internalpb"
+)
+
+type LoadIndexClient struct {
+	inputStream *msgstream.MsgStream
+}
+
+func NewLoadIndexClient(ctx context.Context, pulsarAddress string, loadIndexChannels []string) *LoadIndexClient {
+	loadIndexStream := msgstream.NewPulsarMsgStream(ctx, 0)
+	loadIndexStream.SetPulsarClient(pulsarAddress)
+	loadIndexStream.CreatePulsarProducers(loadIndexChannels)
+	var input msgstream.MsgStream = loadIndexStream
+	return &LoadIndexClient{
+		inputStream: &input,
+	}
+}
+
+func (lic *LoadIndexClient) LoadIndex(indexPaths []string, segmentID int64, fieldID int64) error {
+	baseMsg := msgstream.BaseMsg{
+		BeginTimestamp: 0,
+		EndTimestamp:   0,
+		HashValues:     []uint32{0},
+	}
+	loadIndexRequest := internalPb.LoadIndex{
+		MsgType:    internalPb.MsgType_kLoadIndex,
+		SegmentID:  segmentID,
+		FieldID:    fieldID,
+		IndexPaths: indexPaths,
+	}
+
+	loadIndexMsg := &msgstream.LoadIndexMsg{
+		BaseMsg:   baseMsg,
+		LoadIndex: loadIndexRequest,
+	}
+	msgPack := msgstream.MsgPack{}
+	msgPack.Msgs = append(msgPack.Msgs, loadIndexMsg)
+
+	err := (*lic.inputStream).Produce(&msgPack)
+	return err
+}
+
+func (lic *LoadIndexClient) Close() {
+	(*lic.inputStream).Close()
+}

internal/querynode/collection_replica.go

@@ -54,7 +54,7 @@ type collectionReplica interface {
 
 	// segment
 	getSegmentNum() int
-	getSegmentStatistics() *internalpb.QueryNodeSegStats
+	getSegmentStatistics() *internalpb.QueryNodeStats
 	addSegment(segmentID UniqueID, partitionTag string, collectionID UniqueID) error
 	removeSegment(segmentID UniqueID) error
 	getSegmentByID(segmentID UniqueID) (*Segment, error)
@@ -317,7 +317,7 @@ func (colReplica *collectionReplicaImpl) getSegmentNum() int {
 	return len(colReplica.segments)
 }
 
-func (colReplica *collectionReplicaImpl) getSegmentStatistics() *internalpb.QueryNodeSegStats {
+func (colReplica *collectionReplicaImpl) getSegmentStatistics() *internalpb.QueryNodeStats {
 	colReplica.mu.RLock()
 	defer colReplica.mu.RUnlock()
 
@@ -339,8 +339,8 @@ func (colReplica *collectionReplicaImpl) getSegmentStatistics() *internalpb.Quer
 		segment.recentlyModified = false
 	}
 
-	return &internalpb.QueryNodeSegStats{
-		MsgType:  internalpb.MsgType_kQueryNodeSegStats,
+	return &internalpb.QueryNodeStats{
+		MsgType:  internalpb.MsgType_kQueryNodeStats,
 		SegStats: statisticData,
 	}
 }

internal/querynode/load_index.go

@@ -0,0 +1,41 @@
+package querynode
+
+import (
+	"context"
+
+	"github.com/minio/minio-go/v7"
+	"github.com/zilliztech/milvus-distributed/internal/msgstream"
+)
+
+type LoadIndex struct {
+	ctx    context.Context
+	cancel context.CancelFunc
+	client *minio.Client
+
+	replica                       collectionReplica
+	numCompletedSegmentsToFieldID map[int64]int64
+
+	msgBuffer          chan msgstream.TsMsg
+	unsolvedMsg        []msgstream.TsMsg
+	loadIndexMsgStream msgstream.MsgStream
+
+	queryNodeID UniqueID
+}
+
+func (li *LoadIndex) loadIndex(indexKey []string) [][]byte {
+	// TODO:: load dataStore client interface to load builtIndex according index key
+
+	return nil
+}
+
+func (li *LoadIndex) updateSegmentIndex(bytesIndex [][]byte, segmentID UniqueID) error {
+	// TODO:: dataStore return bytes index, load index to c++ segment
+	// TODO: how to deserialize bytes to segment index?
+
+	return nil
+}
+
+func (li *LoadIndex) sendQueryNodeStats() error {
+	// TODO:: update segment index type in replica, and publish queryNode segmentStats
+	return nil
+}

internal/querynode/stats_service.go

@@ -69,12 +69,12 @@ func (sService *statsService) sendSegmentStatistic() {
 	sService.publicStatistic(statisticData)
 }
 
-func (sService *statsService) publicStatistic(statistic *internalpb.QueryNodeSegStats) {
-	var msg msgstream.TsMsg = &msgstream.QueryNodeSegStatsMsg{
+func (sService *statsService) publicStatistic(statistic *internalpb.QueryNodeStats) {
+	var msg msgstream.TsMsg = &msgstream.QueryNodeStatsMsg{
 		BaseMsg: msgstream.BaseMsg{
 			HashValues: []uint32{0},
 		},
-		QueryNodeSegStats: *statistic,
+		QueryNodeStats: *statistic,
 	}
 
 	var msgPack = msgstream.MsgPack{