diff --git a/internal/dataservice/binlog_helper.go b/internal/dataservice/binlog_helper.go
index f53d6c3a98..0259bdd008 100644
--- a/internal/dataservice/binlog_helper.go
+++ b/internal/dataservice/binlog_helper.go
@@ -3,6 +3,7 @@ package dataservice
 import (
 	"errors"
 	"path"
+	"sort"
 	"strconv"
 
 	"github.com/golang/protobuf/proto"
@@ -172,35 +173,6 @@ func (s *Server) getDDLBinlogMeta(collID UniqueID) (metas []*datapb.DDLBinlogMet
 	return
 }
 
-// prepareSegmentPos prepare segment flushed pos
-func (s *Server) prepareSegmentPos(segInfo *datapb.SegmentInfo, dmlPos, ddlPos *datapb.PositionPair) (map[string]string, error) {
-	if segInfo == nil {
-		return nil, errNilSegmentInfo
-	}
-
-	result := make(map[string]string, 4)
-	if dmlPos != nil {
-		key, err := s.genKey(false, segInfo.ID)
-		if err != nil {
-			return nil, err
-		}
-		msPosPair := proto.MarshalTextString(dmlPos)
-		result[path.Join(Params.SegmentDmlPosSubPath, key)] = msPosPair                   // segment pos
-		result[path.Join(Params.DmlChannelPosSubPath, segInfo.InsertChannel)] = msPosPair // DmlChannel pos
-	}
-	if ddlPos != nil {
-		key, err := s.genKey(false, segInfo.ID)
-		if err != nil {
-			return nil, err
-		}
-		msPosPair := proto.MarshalTextString(ddlPos)
-		result[path.Join(Params.SegmentDdlPosSubPath, key)] = msPosPair                   //segment pos
-		result[path.Join(Params.DdlChannelPosSubPath, segInfo.InsertChannel)] = msPosPair // DdlChannel pos(use dm channel as Key, since dd channel may share same channel name)
-	}
-
-	return result, nil
-}
-
 // GetVChanPositions get vchannel latest postitions with provided dml channel names
 func (s *Server) GetVChanPositions(vchans []vchannel) ([]*datapb.VchannelPair, error) {
 	if s.kvClient == nil {
@@ -209,37 +181,27 @@ func (s *Server) GetVChanPositions(vchans []vchannel) ([]*datapb.VchannelPair, e
 	pairs := make([]*datapb.VchannelPair, 0, len(vchans))
 
 	for _, vchan := range vchans {
-
-		dmlKey := path.Join(Params.DmlChannelPosSubPath, vchan.DmlChannel)
-		ddlKey := path.Join(Params.DdlChannelPosSubPath, vchan.DmlChannel)
+		segments := s.meta.GetSegmentsByChannel(vchan.DmlChannel)
+		sort.Slice(segments, func(i, j int) bool {
+			return segments[i].ID < segments[j].ID
+		})
 
 		dmlPos := &datapb.PositionPair{}
 		ddlPos := &datapb.PositionPair{}
 
-		dmlVal, err := s.kvClient.Load(dmlKey)
 		zp := zeroPos(vchan.DmlChannel)
-		if err != nil {
-			dmlPos.StartPosition = &zp
-			dmlPos.EndPosition = &zp
-		} else {
-			err = proto.UnmarshalText(dmlVal, dmlPos)
-			if err != nil {
-				dmlPos.StartPosition = &zp
-				dmlPos.EndPosition = &zp
-			}
-		}
+		dmlPos.StartPosition = &zp
+		dmlPos.EndPosition = &zp
+		ddlPos.StartPosition = &zp
+		ddlPos.EndPosition = &zp
 
-		ddlVal, err := s.kvClient.Load(ddlKey)
-		zp = zeroPos(vchan.DdlChannel)
-		if err != nil {
-			ddlPos.StartPosition = &zp
-			ddlPos.EndPosition = &zp
-		} else {
-			err = proto.UnmarshalText(ddlVal, ddlPos)
-			if err != nil {
-				ddlPos.StartPosition = &zp
-				ddlPos.EndPosition = &zp
+		// find the last segment with not-nil position
+		for i := 0; i < len(segments); i++ {
+			if segments[i].DmlPosition == nil {
+				break
 			}
+			dmlPos = segments[i].DmlPosition
+			ddlPos = segments[i].DdlPosition
 		}
 
 		pairs = append(pairs, &datapb.VchannelPair{
diff --git a/internal/dataservice/grpc_services.go b/internal/dataservice/grpc_services.go
index b125f185f8..0e325236ba 100644
--- a/internal/dataservice/grpc_services.go
+++ b/internal/dataservice/grpc_services.go
@@ -164,8 +164,12 @@ func (s *Server) GetSegmentStates(ctx context.Context, req *datapb.GetSegmentSta
 		} else {
 			state.Status.ErrorCode = commonpb.ErrorCode_Success
 			state.State = segmentInfo.State
-			state.StartPosition = segmentInfo.StartPosition
-			state.EndPosition = segmentInfo.EndPosition
+			if segmentInfo.DmlPosition != nil {
+				state.StartPosition = segmentInfo.DmlPosition.StartPosition
+				state.EndPosition = segmentInfo.DmlPosition.EndPosition
+			} else {
+
+			}
 		}
 		resp.States = append(resp.States, state)
 	}
@@ -304,15 +308,16 @@ func (s *Server) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPath
 		return resp, nil
 	}
 
-	meta, err := s.prepareBinlogAndPos(req)
+	meta, err := s.prepareBinlog(req)
 	if err != nil {
-		log.Error("prepare binlog and pos meta failed", zap.Error(err))
+		log.Error("prepare binlog meta failed", zap.Error(err))
 		resp.Reason = err.Error()
 		return resp, nil
 	}
 
 	// set segment to SegmentState_Flushing
-	err = s.meta.FlushSegmentWithBinlogAndPos(req.SegmentID, meta)
+	err = s.meta.FlushSegmentWithBinlogAndPos(req.SegmentID, req.DmlPosition,
+		req.DdlPosition, meta)
 	if err != nil {
 		resp.Reason = err.Error()
 		return resp, nil
diff --git a/internal/dataservice/meta.go b/internal/dataservice/meta.go
index 7f73d18789..5ea5d79431 100644
--- a/internal/dataservice/meta.go
+++ b/internal/dataservice/meta.go
@@ -160,18 +160,15 @@ func (m *meta) AddSegment(segment *datapb.SegmentInfo) error {
 	return nil
 }
 
-func (m *meta) UpdateSegmentStatistic(segment *datapb.SegmentInfo) error {
+func (m *meta) UpdateSegmentStatistic(stats *internalpb.SegmentStatisticsUpdates) error {
 	m.Lock()
 	defer m.Unlock()
-	seg, ok := m.segments[segment.ID]
+	seg, ok := m.segments[stats.SegmentID]
 	if !ok {
-		return newErrSegmentNotFound(segment.ID)
+		return newErrSegmentNotFound(stats.SegmentID)
 	}
-	seg.NumRows = segment.NumRows
-	seg.StartPosition = proto.Clone(segment.StartPosition).(*internalpb.MsgPosition)
-	seg.EndPosition = proto.Clone(segment.EndPosition).(*internalpb.MsgPosition)
-
-	if err := m.saveSegmentInfo(segment); err != nil {
+	seg.NumRows = stats.NumRows
+	if err := m.saveSegmentInfo(seg); err != nil {
 		return err
 	}
 	return nil
@@ -234,7 +231,10 @@ func (m *meta) SealSegment(segID UniqueID) error {
 	return nil
 }
 
-func (m *meta) FlushSegmentWithBinlogAndPos(segID UniqueID, kv map[string]string) error {
+func (m *meta) FlushSegmentWithBinlogAndPos(segID UniqueID,
+	dmlPositionPair *datapb.PositionPair,
+	ddlPositionPair *datapb.PositionPair,
+	binlogMeta map[string]string) error {
 	m.Lock()
 	defer m.Unlock()
 
@@ -242,9 +242,15 @@ func (m *meta) FlushSegmentWithBinlogAndPos(segID UniqueID, kv map[string]string
 	if !ok {
 		return newErrSegmentNotFound(segID)
 	}
+	kv := make(map[string]string)
+	for k, v := range binlogMeta {
+		kv[k] = v
+	}
 	segInfo.State = commonpb.SegmentState_Flushing
+	segInfo.DmlPosition = dmlPositionPair
+	segInfo.DdlPosition = ddlPositionPair
 	segBytes := proto.MarshalTextString(segInfo)
-	key := fmt.Sprintf("%s/%d/%d/%d", segmentPrefix, segInfo.CollectionID, segInfo.PartitionID, segInfo.ID)
+	key := m.prepareSegmentPath(segInfo)
 	kv[key] = segBytes
 
 	if err := m.saveKvTxn(kv); err != nil {
@@ -253,6 +259,18 @@ func (m *meta) FlushSegmentWithBinlogAndPos(segID UniqueID, kv map[string]string
 	return nil
 }
 
+func (m *meta) GetSegmentsByChannel(dmlCh string) []*datapb.SegmentInfo {
+	infos := make([]*datapb.SegmentInfo, 0)
+	for _, segment := range m.segments {
+		if segment.InsertChannel != dmlCh {
+			continue
+		}
+		cInfo := proto.Clone(segment).(*datapb.SegmentInfo)
+		infos = append(infos, cInfo)
+	}
+	return infos
+}
+
 func (m *meta) FlushSegment(segID UniqueID) error {
 	m.Lock()
 	defer m.Unlock()
@@ -399,15 +417,19 @@ func (m *meta) GetFlushingSegments() []*datapb.SegmentInfo {
 func (m *meta) saveSegmentInfo(segment *datapb.SegmentInfo) error {
 	segBytes := proto.MarshalTextString(segment)
 
-	key := fmt.Sprintf("%s/%d/%d/%d", segmentPrefix, segment.CollectionID, segment.PartitionID, segment.ID)
+	key := m.prepareSegmentPath(segment)
 	return m.client.Save(key, segBytes)
 }
 
 func (m *meta) removeSegmentInfo(segment *datapb.SegmentInfo) error {
-	key := fmt.Sprintf("%s/%d/%d/%d", segmentPrefix, segment.CollectionID, segment.PartitionID, segment.ID)
+	key := m.prepareSegmentPath(segment)
 	return m.client.Remove(key)
 }
 
+func (m *meta) prepareSegmentPath(segInfo *datapb.SegmentInfo) string {
+	return fmt.Sprintf("%s/%d/%d/%d", segmentPrefix, segInfo.CollectionID, segInfo.PartitionID, segInfo.ID)
+}
+
 func (m *meta) saveKvTxn(kv map[string]string) error {
 	return m.client.MultiSave(kv)
 }
@@ -420,15 +442,5 @@ func BuildSegment(collectionID UniqueID, partitionID UniqueID, segmentID UniqueI
 		InsertChannel: channelName,
 		NumRows:       0,
 		State:         commonpb.SegmentState_Growing,
-		StartPosition: &internalpb.MsgPosition{
-			ChannelName: channelName,
-			MsgID:       make([]byte, 0),
-			Timestamp:   0,
-		},
-		EndPosition: &internalpb.MsgPosition{
-			ChannelName: channelName,
-			MsgID:       make([]byte, 0),
-			Timestamp:   0,
-		},
 	}, nil
 }
diff --git a/internal/dataservice/meta_test.go b/internal/dataservice/meta_test.go
index ba3e235130..fc5658c276 100644
--- a/internal/dataservice/meta_test.go
+++ b/internal/dataservice/meta_test.go
@@ -16,6 +16,7 @@ import (
 	"github.com/golang/protobuf/proto"
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
+	"github.com/milvus-io/milvus/internal/proto/internalpb"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -209,8 +210,10 @@ func TestMeta_Basic(t *testing.T) {
 		assert.Nil(t, err)
 
 		// update seg1 to 300 rows
-		segInfo0.NumRows = rowCount1
-		err = meta.UpdateSegmentStatistic(segInfo0)
+		stat := &internalpb.SegmentStatisticsUpdates{}
+		stat.SegmentID = segInfo0.ID
+		stat.NumRows = rowCount1
+		err = meta.UpdateSegmentStatistic(stat)
 		assert.Nil(t, err)
 
 		nums, err = meta.GetNumRowsOfCollection(collID)
@@ -218,10 +221,9 @@ func TestMeta_Basic(t *testing.T) {
 		assert.EqualValues(t, rowCount1, nums)
 
 		// check update non-exist segment
-		segInfoNonExist := segInfo0
-		segInfoNonExist.ID, err = mockAllocator.allocID()
+		stat.SegmentID, err = mockAllocator.allocID()
 		assert.Nil(t, err)
-		err = meta.UpdateSegmentStatistic(segInfo0)
+		err = meta.UpdateSegmentStatistic(stat)
 		assert.NotNil(t, err)
 
 		// add seg2 with 300 rows
diff --git a/internal/dataservice/segment_allocator.go b/internal/dataservice/segment_allocator.go
index 39fedbf241..0ed627d418 100644
--- a/internal/dataservice/segment_allocator.go
+++ b/internal/dataservice/segment_allocator.go
@@ -20,7 +20,6 @@ import (
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/msgstream"
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
-	"github.com/milvus-io/milvus/internal/proto/internalpb"
 
 	"github.com/milvus-io/milvus/internal/util/trace"
 	"github.com/milvus-io/milvus/internal/util/tsoutil"
@@ -230,24 +229,12 @@ func (s *channelSegmentAllocator) openNewSegment(ctx context.Context, collection
 		return nil, err
 	}
 	segmentInfo := &datapb.SegmentInfo{
-		ID:            id,
-		CollectionID:  collectionID,
-		PartitionID:   partitionID,
-		InsertChannel: channelName,
-		NumRows:       0,
-		State:         commonpb.SegmentState_Growing,
-		StartPosition: &internalpb.MsgPosition{
-			ChannelName: "",
-			MsgID:       []byte{},
-			MsgGroup:    "",
-			Timestamp:   0,
-		},
-		EndPosition: &internalpb.MsgPosition{
-			ChannelName: "",
-			MsgID:       []byte{},
-			MsgGroup:    "",
-			Timestamp:   0,
-		},
+		ID:             id,
+		CollectionID:   collectionID,
+		PartitionID:    partitionID,
+		InsertChannel:  channelName,
+		NumRows:        0,
+		State:          commonpb.SegmentState_Growing,
 		MaxRowNum:      int64(totalRows),
 		LastExpireTime: 0,
 	}
diff --git a/internal/dataservice/server.go b/internal/dataservice/server.go
index 42cf67580c..cd0eb5908e 100644
--- a/internal/dataservice/server.go
+++ b/internal/dataservice/server.go
@@ -56,7 +56,6 @@ type Server struct {
 	meta              *meta
 	segmentInfoStream msgstream.MsgStream
 	segAllocator      segmentAllocator
-	statsHandler      *statsHandler
 	allocator         allocator
 	cluster           *cluster
 	masterClient      types.MasterService
@@ -137,7 +136,6 @@ func (s *Server) Start() error {
 	s.allocator = newAllocator(s.masterClient)
 
 	s.startSegmentAllocator()
-	s.statsHandler = newStatsHandler(s.meta)
 	if err = s.initFlushMsgStream(); err != nil {
 		return err
 	}
@@ -295,7 +293,7 @@ func (s *Server) startStatsChannel(ctx context.Context) {
 			}
 			ssMsg := msg.(*msgstream.SegmentStatisticsMsg)
 			for _, stat := range ssMsg.SegStats {
-				if err := s.statsHandler.HandleSegmentStat(stat); err != nil {
+				if err := s.meta.UpdateSegmentStatistic(stat); err != nil {
 					log.Error("handle segment stat error",
 						zap.Int64("segmentID", stat.SegmentID),
 						zap.Error(err))
@@ -554,13 +552,8 @@ func (s *Server) loadCollectionFromMaster(ctx context.Context, collectionID int6
 	return s.meta.AddCollection(collInfo)
 }
 
-func (s *Server) prepareBinlogAndPos(req *datapb.SaveBinlogPathsRequest) (map[string]string, error) {
+func (s *Server) prepareBinlog(req *datapb.SaveBinlogPathsRequest) (map[string]string, error) {
 	meta := make(map[string]string)
-	segInfo, err := s.meta.GetSegment(req.GetSegmentID())
-	if err != nil {
-		log.Error("Failed to get segment info", zap.Int64("segmentID", req.GetSegmentID()), zap.Error(err))
-		return nil, err
-	}
 
 	for _, fieldBlp := range req.Field2BinlogPaths {
 		fieldMeta, err := s.prepareField2PathMeta(req.SegmentID, fieldBlp)
@@ -579,14 +572,6 @@ func (s *Server) prepareBinlogAndPos(req *datapb.SaveBinlogPathsRequest) (map[st
 	for k, v := range ddlMeta {
 		meta[k] = v
 	}
-	segmentPos, err := s.prepareSegmentPos(segInfo, req.GetDmlPosition(), req.GetDdlPosition())
-	if err != nil {
-		return nil, err
-	}
-	for k, v := range segmentPos {
-		meta[k] = v
-	}
-
 	return meta, nil
 }
 
diff --git a/internal/dataservice/server_test.go b/internal/dataservice/server_test.go
index bd3fc37a06..1cf5c74c2c 100644
--- a/internal/dataservice/server_test.go
+++ b/internal/dataservice/server_test.go
@@ -246,18 +246,6 @@ func TestGetSegmentStates(t *testing.T) {
 		InsertChannel: "",
 		NumRows:       0,
 		State:         commonpb.SegmentState_Growing,
-		StartPosition: &internalpb.MsgPosition{
-			ChannelName: "",
-			MsgID:       []byte{},
-			MsgGroup:    "",
-			Timestamp:   0,
-		},
-		EndPosition: &internalpb.MsgPosition{
-			ChannelName: "",
-			MsgID:       []byte{},
-			MsgGroup:    "",
-			Timestamp:   0,
-		},
 	})
 	assert.Nil(t, err)
 
@@ -814,6 +802,13 @@ func TestGetVChannelPos(t *testing.T) {
 		InsertChannel: "ch1",
 	})
 	assert.Nil(t, err)
+	err = svr.meta.AddSegment(&datapb.SegmentInfo{
+		ID:            2,
+		CollectionID:  0,
+		PartitionID:   0,
+		InsertChannel: "ch1",
+	})
+	assert.Nil(t, err)
 	req := &datapb.SaveBinlogPathsRequest{
 		SegmentID:         1,
 		CollectionID:      0,
diff --git a/internal/dataservice/stats_handler.go b/internal/dataservice/stats_handler.go
deleted file mode 100644
index 54d04b06db..0000000000
--- a/internal/dataservice/stats_handler.go
+++ /dev/null
@@ -1,46 +0,0 @@
-// 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.
-package dataservice
-
-import (
-	"github.com/milvus-io/milvus/internal/log"
-	"github.com/milvus-io/milvus/internal/proto/internalpb"
-	"go.uber.org/zap"
-)
-
-type statsHandler struct {
-	meta *meta
-}
-
-func newStatsHandler(meta *meta) *statsHandler {
-	return &statsHandler{
-		meta: meta,
-	}
-}
-
-func (handler *statsHandler) HandleSegmentStat(segStats *internalpb.SegmentStatisticsUpdates) error {
-	segMeta, err := handler.meta.GetSegment(segStats.SegmentID)
-	if err != nil {
-		return err
-	}
-
-	if segStats.StartPosition != nil {
-		segMeta.StartPosition = segStats.StartPosition
-	}
-
-	if segStats.EndPosition != nil {
-		segMeta.EndPosition = segStats.EndPosition
-	}
-
-	segMeta.NumRows = segStats.NumRows
-	log.Debug("stats_handler update segment", zap.Any("segmentID", segMeta.ID), zap.Any("State", segMeta.State))
-	return handler.meta.UpdateSegmentStatistic(segMeta)
-}
diff --git a/internal/proto/data_service.proto b/internal/proto/data_service.proto
index 79703624ed..14c787bbf2 100644
--- a/internal/proto/data_service.proto
+++ b/internal/proto/data_service.proto
@@ -234,8 +234,8 @@ message SegmentInfo {
   string insert_channel = 4;
   int64 num_rows = 5;
   common.SegmentState state = 6;
-  internal.MsgPosition start_position = 7;
-  internal.MsgPosition end_position = 8;
+  PositionPair dmlPosition = 7;
+  PositionPair ddlPosition = 8;
   int64 max_row_num = 9;
   uint64 last_expire_time = 10;
 }
diff --git a/internal/proto/datapb/data_service.pb.go b/internal/proto/datapb/data_service.pb.go
index 45fb689be1..760dbcc481 100644
--- a/internal/proto/datapb/data_service.pb.go
+++ b/internal/proto/datapb/data_service.pb.go
@@ -1752,19 +1752,19 @@ func (m *CollectionInfo) GetPartitions() []int64 {
 }
 
 type SegmentInfo struct {
-	ID                   int64                   `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
-	CollectionID         int64                   `protobuf:"varint,2,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
-	PartitionID          int64                   `protobuf:"varint,3,opt,name=partitionID,proto3" json:"partitionID,omitempty"`
-	InsertChannel        string                  `protobuf:"bytes,4,opt,name=insert_channel,json=insertChannel,proto3" json:"insert_channel,omitempty"`
-	NumRows              int64                   `protobuf:"varint,5,opt,name=num_rows,json=numRows,proto3" json:"num_rows,omitempty"`
-	State                commonpb.SegmentState   `protobuf:"varint,6,opt,name=state,proto3,enum=milvus.proto.common.SegmentState" json:"state,omitempty"`
-	StartPosition        *internalpb.MsgPosition `protobuf:"bytes,7,opt,name=start_position,json=startPosition,proto3" json:"start_position,omitempty"`
-	EndPosition          *internalpb.MsgPosition `protobuf:"bytes,8,opt,name=end_position,json=endPosition,proto3" json:"end_position,omitempty"`
-	MaxRowNum            int64                   `protobuf:"varint,9,opt,name=max_row_num,json=maxRowNum,proto3" json:"max_row_num,omitempty"`
-	LastExpireTime       uint64                  `protobuf:"varint,10,opt,name=last_expire_time,json=lastExpireTime,proto3" json:"last_expire_time,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                `json:"-"`
-	XXX_unrecognized     []byte                  `json:"-"`
-	XXX_sizecache        int32                   `json:"-"`
+	ID                   int64                 `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
+	CollectionID         int64                 `protobuf:"varint,2,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
+	PartitionID          int64                 `protobuf:"varint,3,opt,name=partitionID,proto3" json:"partitionID,omitempty"`
+	InsertChannel        string                `protobuf:"bytes,4,opt,name=insert_channel,json=insertChannel,proto3" json:"insert_channel,omitempty"`
+	NumRows              int64                 `protobuf:"varint,5,opt,name=num_rows,json=numRows,proto3" json:"num_rows,omitempty"`
+	State                commonpb.SegmentState `protobuf:"varint,6,opt,name=state,proto3,enum=milvus.proto.common.SegmentState" json:"state,omitempty"`
+	DmlPosition          *PositionPair         `protobuf:"bytes,7,opt,name=dmlPosition,proto3" json:"dmlPosition,omitempty"`
+	DdlPosition          *PositionPair         `protobuf:"bytes,8,opt,name=ddlPosition,proto3" json:"ddlPosition,omitempty"`
+	MaxRowNum            int64                 `protobuf:"varint,9,opt,name=max_row_num,json=maxRowNum,proto3" json:"max_row_num,omitempty"`
+	LastExpireTime       uint64                `protobuf:"varint,10,opt,name=last_expire_time,json=lastExpireTime,proto3" json:"last_expire_time,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}              `json:"-"`
+	XXX_unrecognized     []byte                `json:"-"`
+	XXX_sizecache        int32                 `json:"-"`
 }
 
 func (m *SegmentInfo) Reset()         { *m = SegmentInfo{} }
@@ -1834,16 +1834,16 @@ func (m *SegmentInfo) GetState() commonpb.SegmentState {
 	return commonpb.SegmentState_SegmentStateNone
 }
 
-func (m *SegmentInfo) GetStartPosition() *internalpb.MsgPosition {
+func (m *SegmentInfo) GetDmlPosition() *PositionPair {
 	if m != nil {
-		return m.StartPosition
+		return m.DmlPosition
 	}
 	return nil
 }
 
-func (m *SegmentInfo) GetEndPosition() *internalpb.MsgPosition {
+func (m *SegmentInfo) GetDdlPosition() *PositionPair {
 	if m != nil {
-		return m.EndPosition
+		return m.DdlPosition
 	}
 	return nil
 }
@@ -2590,142 +2590,142 @@ func init() {
 func init() { proto.RegisterFile("data_service.proto", fileDescriptor_3385cd32ad6cfe64) }
 
 var fileDescriptor_3385cd32ad6cfe64 = []byte{
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.