diff --git a/include/libs/sync/sync.h b/include/libs/sync/sync.h
index 5c539f0ef3..8a6d6b7722 100644
--- a/include/libs/sync/sync.h
+++ b/include/libs/sync/sync.h
@@ -215,6 +215,7 @@ int32_t     syncProposeBatch(int64_t rid, SRpcMsg* pMsgArr, bool* pIsWeakArr, in
 bool        syncEnvIsStart();
 const char* syncStr(ESyncState state);
 bool        syncIsRestoreFinish(int64_t rid);
+int32_t     syncGetSnapshotByIndex(int64_t rid, SyncIndex index, SSnapshot* pSnapshot);
 
 int32_t syncReconfig(int64_t rid, const SSyncCfg* pNewCfg);
 
diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index 48550b890a..d59a0a64b3 100644
--- a/include/libs/transport/trpc.h
+++ b/include/libs/transport/trpc.h
@@ -27,7 +27,7 @@ extern "C" {
 
 #define TAOS_CONN_SERVER 0
 #define TAOS_CONN_CLIENT 1
-#define IsReq(pMsg)      (pMsg->msgType & 1U)
+#define IsReq(pMsg) (pMsg->msgType & 1U)
 
 extern int32_t tsRpcHeadSize;
 
@@ -35,12 +35,13 @@ typedef struct {
   uint32_t clientIp;
   uint16_t clientPort;
   int64_t  applyIndex;
+  uint64_t applyTerm;
   char     user[TSDB_USER_LEN];
 } SRpcConnInfo;
 
 typedef struct SRpcHandleInfo {
   // rpc info
-  void *   handle;         // rpc handle returned to app
+  void    *handle;         // rpc handle returned to app
   int64_t  refId;          // refid, used by server
   int32_t  noResp;         // has response or not(default 0, 0: resp, 1: no resp);
   int32_t  persistHandle;  // persist handle or not
@@ -53,7 +54,7 @@ typedef struct SRpcHandleInfo {
   void *node;     // node mgmt handle
 
   // resp info
-  void *  rsp;
+  void   *rsp;
   int32_t rspLen;
 
   // conn info
@@ -62,7 +63,7 @@ typedef struct SRpcHandleInfo {
 
 typedef struct SRpcMsg {
   tmsg_t         msgType;
-  void *         pCont;
+  void          *pCont;
   int32_t        contLen;
   int32_t        code;
   SRpcHandleInfo info;
@@ -74,7 +75,7 @@ typedef bool (*RpcRfp)(int32_t code, tmsg_t msgType);
 typedef struct SRpcInit {
   char     localFqdn[TSDB_FQDN_LEN];
   uint16_t localPort;     // local port
-  char *   label;         // for debug purpose
+  char    *label;         // for debug purpose
   int32_t  numOfThreads;  // number of threads to handle connections
   int32_t  sessions;      // number of sessions allowed
   int8_t   connType;      // TAOS_CONN_UDP, TAOS_CONN_TCPC, TAOS_CONN_TCPS
@@ -99,12 +100,12 @@ typedef struct {
 
 typedef struct {
   int32_t msgType;
-  void *  val;
+  void   *val;
   int32_t (*clone)(void *src, void **dst);
 } SRpcBrokenlinkVal;
 
 typedef struct {
-  SHashObj *        args;
+  SHashObj         *args;
   SRpcBrokenlinkVal brokenVal;
   void (*freeFunc)(const void *arg);
 } SRpcCtx;
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index add8c6069a..399a5b6299 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -234,17 +234,14 @@ int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
   }
 
 #if 1
-  char          *syncNodeStr = sync2SimpleStr(pVnode->sync);
-  static int64_t vndTick = 0;
-  if (++vndTick % 10 == 1) {
-    vGTrace("vgId:%d, sync trace msg:%s, %s", syncGetVgId(pVnode->sync), TMSG_INFO(pMsg->msgType), syncNodeStr);
-  }
-  if (gRaftDetailLog) {
-    char logBuf[512] = {0};
-    snprintf(logBuf, sizeof(logBuf), "vnode process syncmsg, msgType:%d, syncNode:%s", pMsg->msgType, syncNodeStr);
-    syncRpcMsgLog2(logBuf, pMsg);
-  }
-  taosMemoryFree(syncNodeStr);
+  do {
+    char          *syncNodeStr = sync2SimpleStr(pVnode->sync);
+    static int64_t vndTick = 0;
+    if (++vndTick % 10 == 1) {
+      vGTrace("vgId:%d, sync trace msg:%s, %s", syncGetVgId(pVnode->sync), TMSG_INFO(pMsg->msgType), syncNodeStr);
+    }
+    taosMemoryFree(syncNodeStr);
+  } while (0);
 #endif
 
   if (syncNodeStrategy(pSyncNode) == SYNC_STRATEGY_NO_SNAPSHOT) {
@@ -297,7 +294,8 @@ int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
       vGError("vgId:%d, msg:%p failed to process since error msg type:%d", pVnode->config.vgId, pMsg->msgType);
       code = -1;
     }
-  } else {
+
+  } else if (syncNodeStrategy(pSyncNode) == SYNC_STRATEGY_WAL_FIRST) {
     // use wal first strategy
     if (pMsg->msgType == TDMT_SYNC_TIMEOUT) {
       SyncTimeout *pSyncMsg = syncTimeoutFromRpcMsg2(pMsg);
@@ -403,43 +401,53 @@ static void vnodeSyncReconfig(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SReCon
 }
 
 static void vnodeSyncCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  SVnode   *pVnode = pFsm->data;
-  SSnapshot snapshot = {0};
-  SyncIndex beginIndex = SYNC_INDEX_INVALID;
-  char      logBuf[256] = {0};
-
-  snprintf(logBuf, sizeof(logBuf),
-           "commitCb execute, pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, beginIndex :%ld\n", pFsm,
-           cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state), beginIndex);
-  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+  SVnode *pVnode = pFsm->data;
+  vTrace("vgId:%d, commit-cb is excuted, fsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, msgtype:%d %s",
+         syncGetVgId(pVnode->sync), pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state,
+         syncUtilState2String(cbMeta.state), pMsg->msgType, TMSG_INFO(pMsg->msgType));
 
   SRpcMsg rpcMsg = {.msgType = pMsg->msgType, .contLen = pMsg->contLen};
   rpcMsg.pCont = rpcMallocCont(rpcMsg.contLen);
   memcpy(rpcMsg.pCont, pMsg->pCont, pMsg->contLen);
   syncGetAndDelRespRpc(pVnode->sync, cbMeta.seqNum, &rpcMsg.info);
   rpcMsg.info.conn.applyIndex = cbMeta.index;
+  rpcMsg.info.conn.applyTerm = cbMeta.term;
   tmsgPutToQueue(&pVnode->msgCb, APPLY_QUEUE, &rpcMsg);
 }
 
 static void vnodeSyncPreCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  char logBuf[256] = {0};
-  snprintf(logBuf, sizeof(logBuf), "preCommitCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n", pFsm,
-           cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
-  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+  SVnode *pVnode = pFsm->data;
+  vTrace("vgId:%d, pre-commit-cb is excuted, fsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, msgtype:%d %s",
+         syncGetVgId(pVnode->sync), pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state,
+         syncUtilState2String(cbMeta.state), pMsg->msgType, TMSG_INFO(pMsg->msgType));
 }
 
 static void vnodeSyncRollBackMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  char logBuf[256] = {0};
-  snprintf(logBuf, sizeof(logBuf), "rollBackCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n", pFsm,
-           cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
-  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+  SVnode *pVnode = pFsm->data;
+  vTrace("vgId:%d, rollback-cb is excuted, fsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, msgtype:%d %s",
+         syncGetVgId(pVnode->sync), pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state,
+         syncUtilState2String(cbMeta.state), pMsg->msgType, TMSG_INFO(pMsg->msgType));
 }
 
-static int32_t vnodeSnapshotStartRead(struct SSyncFSM *pFsm, void *pParam, void **ppReader) { return 0; }
+static int32_t vnodeSnapshotStartRead(struct SSyncFSM *pFsm, void *pParam, void **ppReader) {
+  SVnode         *pVnode = pFsm->data;
+  SSnapshotParam *pSnapshotParam = pParam;
+  int32_t         code =
+      vnodeSnapshotReaderOpen(pVnode, (SVSnapshotReader **)ppReader, pSnapshotParam->start, pSnapshotParam->end);
+  return code;
+}
 
-static int32_t vnodeSnapshotStopRead(struct SSyncFSM *pFsm, void *pReader) { return 0; }
+static int32_t vnodeSnapshotStopRead(struct SSyncFSM *pFsm, void *pReader) {
+  SVnode *pVnode = pFsm->data;
+  int32_t code = vnodeSnapshotReaderClose(pReader);
+  return code;
+}
 
-static int32_t vnodeSnapshotDoRead(struct SSyncFSM *pFsm, void *pReader, void **ppBuf, int32_t *len) { return 0; }
+static int32_t vnodeSnapshotDoRead(struct SSyncFSM *pFsm, void *pReader, void **ppBuf, int32_t *len) {
+  SVnode *pVnode = pFsm->data;
+  int32_t code = vnodeSnapshotRead(pReader, (const void **)ppBuf, len);
+  return code;
+}
 
 static int32_t vnodeSnapshotStartWrite(struct SSyncFSM *pFsm, void *pParam, void **ppWriter) { return 0; }
 
diff --git a/source/libs/sync/inc/syncRaftCfg.h b/source/libs/sync/inc/syncRaftCfg.h
index 086a6aa074..fead7cdc76 100644
--- a/source/libs/sync/inc/syncRaftCfg.h
+++ b/source/libs/sync/inc/syncRaftCfg.h
@@ -36,6 +36,7 @@ typedef struct SRaftCfg {
   TdFilePtr pFile;
   char      path[TSDB_FILENAME_LEN * 2];
   int8_t    isStandBy;
+  int32_t   batchSize;
   int8_t    snapshotStrategy;
   SyncIndex lastConfigIndex;
 
@@ -49,19 +50,20 @@ int32_t   raftCfgClose(SRaftCfg *pRaftCfg);
 int32_t   raftCfgPersist(SRaftCfg *pRaftCfg);
 int32_t   raftCfgAddConfigIndex(SRaftCfg *pRaftCfg, SyncIndex configIndex);
 
-cJSON  *syncCfg2Json(SSyncCfg *pSyncCfg);
-char   *syncCfg2Str(SSyncCfg *pSyncCfg);
-char   *syncCfg2SimpleStr(SSyncCfg *pSyncCfg);
+cJSON * syncCfg2Json(SSyncCfg *pSyncCfg);
+char *  syncCfg2Str(SSyncCfg *pSyncCfg);
+char *  syncCfg2SimpleStr(SSyncCfg *pSyncCfg);
 int32_t syncCfgFromJson(const cJSON *pRoot, SSyncCfg *pSyncCfg);
 int32_t syncCfgFromStr(const char *s, SSyncCfg *pSyncCfg);
 
-cJSON  *raftCfg2Json(SRaftCfg *pRaftCfg);
-char   *raftCfg2Str(SRaftCfg *pRaftCfg);
+cJSON * raftCfg2Json(SRaftCfg *pRaftCfg);
+char *  raftCfg2Str(SRaftCfg *pRaftCfg);
 int32_t raftCfgFromJson(const cJSON *pRoot, SRaftCfg *pRaftCfg);
 int32_t raftCfgFromStr(const char *s, SRaftCfg *pRaftCfg);
 
 typedef struct SRaftCfgMeta {
   int8_t    isStandBy;
+  int32_t   batchSize;
   int8_t    snapshotStrategy;
   SyncIndex lastConfigIndex;
 } SRaftCfgMeta;
diff --git a/source/libs/sync/inc/syncSnapshot.h b/source/libs/sync/inc/syncSnapshot.h
index 3b1e4f4560..0dc67cf150 100644
--- a/source/libs/sync/inc/syncSnapshot.h
+++ b/source/libs/sync/inc/syncSnapshot.h
@@ -40,14 +40,14 @@ typedef struct SSyncSnapshotSender {
   bool           start;
   int32_t        seq;
   int32_t        ack;
-  void          *pReader;
-  void          *pCurrentBlock;
+  void *         pReader;
+  void *         pCurrentBlock;
   int32_t        blockLen;
   SSnapshotParam snapshotParam;
   SSnapshot      snapshot;
   SSyncCfg       lastConfig;
   int64_t        sendingMS;
-  SSyncNode     *pSyncNode;
+  SSyncNode *    pSyncNode;
   int32_t        replicaIndex;
   SyncTerm       term;
   SyncTerm       privateTerm;
@@ -64,20 +64,20 @@ int32_t              snapshotSend(SSyncSnapshotSender *pSender);
 int32_t              snapshotReSend(SSyncSnapshotSender *pSender);
 
 cJSON *snapshotSender2Json(SSyncSnapshotSender *pSender);
-char  *snapshotSender2Str(SSyncSnapshotSender *pSender);
-char  *snapshotSender2SimpleStr(SSyncSnapshotSender *pSender, char *event);
+char * snapshotSender2Str(SSyncSnapshotSender *pSender);
+char * snapshotSender2SimpleStr(SSyncSnapshotSender *pSender, char *event);
 
 //---------------------------------------------------
 typedef struct SSyncSnapshotReceiver {
   bool           start;
   int32_t        ack;
-  void          *pWriter;
+  void *         pWriter;
   SyncTerm       term;
   SyncTerm       privateTerm;
   SSnapshotParam snapshotParam;
   SSnapshot      snapshot;
   SRaftId        fromId;
-  SSyncNode     *pSyncNode;
+  SSyncNode *    pSyncNode;
 
 } SSyncSnapshotReceiver;
 
@@ -88,8 +88,8 @@ int32_t                snapshotReceiverStop(SSyncSnapshotReceiver *pReceiver);
 bool                   snapshotReceiverIsStart(SSyncSnapshotReceiver *pReceiver);
 
 cJSON *snapshotReceiver2Json(SSyncSnapshotReceiver *pReceiver);
-char  *snapshotReceiver2Str(SSyncSnapshotReceiver *pReceiver);
-char  *snapshotReceiver2SimpleStr(SSyncSnapshotReceiver *pReceiver, char *event);
+char * snapshotReceiver2Str(SSyncSnapshotReceiver *pReceiver);
+char * snapshotReceiver2SimpleStr(SSyncSnapshotReceiver *pReceiver, char *event);
 
 //---------------------------------------------------
 // on message
diff --git a/source/libs/sync/src/syncAppendEntries.c b/source/libs/sync/src/syncAppendEntries.c
index c923ee3d1d..885ab1acae 100644
--- a/source/libs/sync/src/syncAppendEntries.c
+++ b/source/libs/sync/src/syncAppendEntries.c
@@ -834,7 +834,7 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
   //
   // operation:
   // if hasAppendEntries && pMsg->prevLogIndex == ths->commitIndex, append entry
-  // match my-commit-index or my-commit-index + 1
+  // match my-commit-index or my-commit-index + batchSize
   do {
     bool condition = (pMsg->term == ths->pRaftStore->currentTerm) && (ths->state == TAOS_SYNC_STATE_FOLLOWER) &&
                      (pMsg->prevLogIndex <= ths->commitIndex);
@@ -928,11 +928,13 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
     bool condition = condition1 || condition2;
 
     if (condition) {
-      char logBuf[128];
-      snprintf(logBuf, sizeof(logBuf),
-               "recv sync-append-entries-batch, not match, pre-index:%ld, pre-term:%lu, datalen:%d", pMsg->prevLogIndex,
-               pMsg->prevLogTerm, pMsg->dataLen);
-      syncNodeEventLog(ths, logBuf);
+      do {
+        char logBuf[128];
+        snprintf(logBuf, sizeof(logBuf),
+                 "recv sync-append-entries-batch, not match, pre-index:%ld, pre-term:%lu, datalen:%d",
+                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen);
+        syncNodeEventLog(ths, logBuf);
+      } while (0);
 
       // prepare response msg
       SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild(ths->vgId);
diff --git a/source/libs/sync/src/syncAppendEntriesReply.c b/source/libs/sync/src/syncAppendEntriesReply.c
index f3206e9ccc..e4724fc999 100644
--- a/source/libs/sync/src/syncAppendEntriesReply.c
+++ b/source/libs/sync/src/syncAppendEntriesReply.c
@@ -109,19 +109,30 @@ int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* p
 }
 
 // only start once
-static void syncNodeStartSnapshot(SSyncNode* ths, SyncIndex beginIndex, SyncIndex endIndex, SyncTerm lastApplyTerm,
-                                  SyncAppendEntriesReply* pMsg) {
+static void syncNodeStartSnapshotOnce(SSyncNode* ths, SyncIndex beginIndex, SyncIndex endIndex, SyncTerm lastApplyTerm,
+                                      SyncAppendEntriesReply* pMsg) {
   // get sender
   SSyncSnapshotSender* pSender = syncNodeGetSnapshotSender(ths, &(pMsg->srcId));
   ASSERT(pSender != NULL);
 
+  if (snapshotSenderIsStart(pSender)) {
+    do {
+      char* eventLog = snapshotSender2SimpleStr(pSender, "snapshot sender already start");
+      syncNodeErrorLog(ths, eventLog);
+      taosMemoryFree(eventLog);
+    } while (0);
+
+    return;
+  }
+
   SSnapshot snapshot = {
       .data = NULL, .lastApplyIndex = endIndex, .lastApplyTerm = lastApplyTerm, .lastConfigIndex = SYNC_INDEX_INVALID};
-
   void*          pReader = NULL;
   SSnapshotParam readerParam = {.start = beginIndex, .end = endIndex};
-  ths->pFsm->FpSnapshotStartRead(ths->pFsm, &readerParam, &pReader);
-  if (!snapshotSenderIsStart(pSender) && pMsg->privateTerm < pSender->privateTerm) {
+  int32_t        code = ths->pFsm->FpSnapshotStartRead(ths->pFsm, &readerParam, &pReader);
+  ASSERT(code == 0);
+
+  if (pMsg->privateTerm < pSender->privateTerm) {
     ASSERT(pReader != NULL);
     snapshotSenderStart(pSender, readerParam, snapshot, pReader);
 
@@ -178,7 +189,9 @@ int32_t syncNodeOnAppendEntriesReplySnapshot2Cb(SSyncNode* ths, SyncAppendEntrie
       // start snapshot <match+1, old snapshot.end>
       SSnapshot oldSnapshot;
       ths->pFsm->FpGetSnapshotInfo(ths->pFsm, &oldSnapshot);
-      syncNodeStartSnapshot(ths, newMatchIndex + 1, oldSnapshot.lastApplyIndex, oldSnapshot.lastApplyTerm, pMsg);
+      ASSERT(oldSnapshot.lastApplyIndex >= newMatchIndex + 1);
+      syncNodeStartSnapshotOnce(ths, newMatchIndex + 1, oldSnapshot.lastApplyIndex, oldSnapshot.lastApplyTerm,
+                                pMsg);  // term maybe not ok?
 
       syncIndexMgrSetIndex(ths->pNextIndex, &(pMsg->srcId), oldSnapshot.lastApplyIndex + 1);
       syncIndexMgrSetIndex(ths->pMatchIndex, &(pMsg->srcId), newMatchIndex);
@@ -187,7 +200,6 @@ int32_t syncNodeOnAppendEntriesReplySnapshot2Cb(SSyncNode* ths, SyncAppendEntrie
   } else {
     SyncIndex nextIndex = syncIndexMgrGetIndex(ths->pNextIndex, &(pMsg->srcId));
 
-    // notice! int64, uint64
     if (nextIndex > SYNC_INDEX_BEGIN) {
       --nextIndex;
 
@@ -198,7 +210,7 @@ int32_t syncNodeOnAppendEntriesReplySnapshot2Cb(SSyncNode* ths, SyncAppendEntrie
         SSyncRaftEntry* pEntry;
         int32_t         code = ths->pLogStore->syncLogGetEntry(ths->pLogStore, nextIndex, &pEntry);
         ASSERT(code == 0);
-        syncNodeStartSnapshot(ths, SYNC_INDEX_BEGIN, nextIndex, pEntry->term, pMsg);
+        syncNodeStartSnapshotOnce(ths, SYNC_INDEX_BEGIN, nextIndex, pEntry->term, pMsg);
 
         // get sender
         SSyncSnapshotSender* pSender = syncNodeGetSnapshotSender(ths, &(pMsg->srcId));
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 2192418c50..e207d89212 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -397,6 +397,38 @@ bool syncIsRestoreFinish(int64_t rid) {
   return b;
 }
 
+int32_t syncGetSnapshotByIndex(int64_t rid, SyncIndex index, SSnapshot* pSnapshot) {
+  if (index < SYNC_INDEX_BEGIN) {
+    return -1;
+  }
+
+  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  if (pSyncNode == NULL) {
+    return -1;
+  }
+  ASSERT(rid == pSyncNode->rid);
+
+  SSyncRaftEntry* pEntry = NULL;
+  int32_t         code = pSyncNode->pLogStore->syncLogGetEntry(pSyncNode->pLogStore, index, &pEntry);
+  if (code != 0) {
+    if (pEntry != NULL) {
+      syncEntryDestory(pEntry);
+    }
+    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+    return -1;
+  }
+  ASSERT(pEntry != NULL);
+
+  pSnapshot->data = NULL;
+  pSnapshot->lastApplyIndex = index;
+  pSnapshot->lastApplyTerm = pEntry->term;
+  pSnapshot->lastConfigIndex = syncNodeGetSnapshotConfigIndex(pSyncNode, index);
+
+  syncEntryDestory(pEntry);
+  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  return 0;
+}
+
 int32_t syncGetSnapshotMeta(int64_t rid, struct SSnapshotMeta* sMeta) {
   SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
   if (pSyncNode == NULL) {
@@ -786,6 +818,7 @@ int32_t syncNodePropose(SSyncNode* pSyncNode, SRpcMsg* pMsg, bool isWeak) {
       int32_t   code = syncNodeOnClientRequestCb(pSyncNode, pSyncMsg, &retIndex);
       if (code == 0) {
         pMsg->info.conn.applyIndex = retIndex;
+        pMsg->info.conn.applyTerm = pSyncNode->pRaftStore->currentTerm;
         rpcFreeCont(rpcMsg.pCont);
         syncRespMgrDel(pSyncNode->pSyncRespMgr, seqNum);
         ret = 1;
@@ -846,6 +879,7 @@ SSyncNode* syncNodeOpen(const SSyncInfo* pOldSyncInfo) {
     meta.isStandBy = pSyncInfo->isStandBy;
     meta.snapshotStrategy = pSyncInfo->snapshotStrategy;
     meta.lastConfigIndex = SYNC_INDEX_INVALID;
+    meta.batchSize = pSyncInfo->batchSize;
     ret = raftCfgCreateFile((SSyncCfg*)&(pSyncInfo->syncCfg), meta, pSyncNode->configPath);
     ASSERT(ret == 0);
 
diff --git a/source/libs/sync/src/syncRaftCfg.c b/source/libs/sync/src/syncRaftCfg.c
index 7eb7eb0db1..ead1168632 100644
--- a/source/libs/sync/src/syncRaftCfg.c
+++ b/source/libs/sync/src/syncRaftCfg.c
@@ -101,7 +101,7 @@ cJSON *syncCfg2Json(SSyncCfg *pSyncCfg) {
 
 char *syncCfg2Str(SSyncCfg *pSyncCfg) {
   cJSON *pJson = syncCfg2Json(pSyncCfg);
-  char  *serialized = cJSON_Print(pJson);
+  char * serialized = cJSON_Print(pJson);
   cJSON_Delete(pJson);
   return serialized;
 }
@@ -109,7 +109,7 @@ char *syncCfg2Str(SSyncCfg *pSyncCfg) {
 char *syncCfg2SimpleStr(SSyncCfg *pSyncCfg) {
   if (pSyncCfg != NULL) {
     int32_t len = 512;
-    char   *s = taosMemoryMalloc(len);
+    char *  s = taosMemoryMalloc(len);
     memset(s, 0, len);
 
     snprintf(s, len, "{replica-num:%d, my-index:%d, ", pSyncCfg->replicaNum, pSyncCfg->myIndex);
@@ -183,6 +183,7 @@ cJSON *raftCfg2Json(SRaftCfg *pRaftCfg) {
   cJSON_AddItemToObject(pRoot, "SSyncCfg", syncCfg2Json(&(pRaftCfg->cfg)));
   cJSON_AddNumberToObject(pRoot, "isStandBy", pRaftCfg->isStandBy);
   cJSON_AddNumberToObject(pRoot, "snapshotStrategy", pRaftCfg->snapshotStrategy);
+  cJSON_AddNumberToObject(pRoot, "batchSize", pRaftCfg->batchSize);
 
   char buf64[128];
   snprintf(buf64, sizeof(buf64), "%ld", pRaftCfg->lastConfigIndex);
@@ -205,7 +206,7 @@ cJSON *raftCfg2Json(SRaftCfg *pRaftCfg) {
 
 char *raftCfg2Str(SRaftCfg *pRaftCfg) {
   cJSON *pJson = raftCfg2Json(pRaftCfg);
-  char  *serialized = cJSON_Print(pJson);
+  char * serialized = cJSON_Print(pJson);
   cJSON_Delete(pJson);
   return serialized;
 }
@@ -228,6 +229,7 @@ int32_t raftCfgCreateFile(SSyncCfg *pCfg, SRaftCfgMeta meta, const char *path) {
   SRaftCfg raftCfg;
   raftCfg.cfg = *pCfg;
   raftCfg.isStandBy = meta.isStandBy;
+  raftCfg.batchSize = meta.batchSize;
   raftCfg.snapshotStrategy = meta.snapshotStrategy;
   raftCfg.lastConfigIndex = meta.lastConfigIndex;
   raftCfg.configIndexCount = 1;
@@ -257,6 +259,9 @@ int32_t raftCfgFromJson(const cJSON *pRoot, SRaftCfg *pRaftCfg) {
   cJSON *pJsonIsStandBy = cJSON_GetObjectItem(pJson, "isStandBy");
   pRaftCfg->isStandBy = cJSON_GetNumberValue(pJsonIsStandBy);
 
+  cJSON *pJsonBatchSize = cJSON_GetObjectItem(pJson, "batchSize");
+  pRaftCfg->batchSize = cJSON_GetNumberValue(pJsonBatchSize);
+
   cJSON *pJsonSnapshotStrategy = cJSON_GetObjectItem(pJson, "snapshotStrategy");
   pRaftCfg->snapshotStrategy = cJSON_GetNumberValue(pJsonSnapshotStrategy);
 
@@ -280,7 +285,7 @@ int32_t raftCfgFromJson(const cJSON *pRoot, SRaftCfg *pRaftCfg) {
     (pRaftCfg->configIndexArr)[i] = atoll(pIndex->valuestring);
   }
 
-  cJSON  *pJsonSyncCfg = cJSON_GetObjectItem(pJson, "SSyncCfg");
+  cJSON * pJsonSyncCfg = cJSON_GetObjectItem(pJson, "SSyncCfg");
   int32_t code = syncCfgFromJson(pJsonSyncCfg, &(pRaftCfg->cfg));
   ASSERT(code == 0);
 
diff --git a/source/libs/sync/src/syncRespMgr.c b/source/libs/sync/src/syncRespMgr.c
index 990a92aad7..8dd1349edb 100644
--- a/source/libs/sync/src/syncRespMgr.c
+++ b/source/libs/sync/src/syncRespMgr.c
@@ -127,7 +127,7 @@ void syncRespCleanByTTL(SSyncRespMgr *pObj, int64_t ttl) {
 
   while (pStub) {
     size_t     len;
-    void      *key = taosHashGetKey(pStub, &len);
+    void *     key = taosHashGetKey(pStub, &len);
     SyncIndex *pIndex = (SyncIndex *)key;
 
     int64_t nowMS = taosGetTimestampMs();
diff --git a/source/libs/sync/src/syncSnapshot.c b/source/libs/sync/src/syncSnapshot.c
index 5cdfec72c5..a33f66733b 100644
--- a/source/libs/sync/src/syncSnapshot.c
+++ b/source/libs/sync/src/syncSnapshot.c
@@ -374,14 +374,14 @@ cJSON *snapshotSender2Json(SSyncSnapshotSender *pSender) {
 
 char *snapshotSender2Str(SSyncSnapshotSender *pSender) {
   cJSON *pJson = snapshotSender2Json(pSender);
-  char  *serialized = cJSON_Print(pJson);
+  char * serialized = cJSON_Print(pJson);
   cJSON_Delete(pJson);
   return serialized;
 }
 
 char *snapshotSender2SimpleStr(SSyncSnapshotSender *pSender, char *event) {
   int32_t len = 256;
-  char   *s = taosMemoryMalloc(len);
+  char *  s = taosMemoryMalloc(len);
 
   SRaftId  destId = pSender->pSyncNode->replicasId[pSender->replicaIndex];
   char     host[64];
@@ -644,7 +644,7 @@ cJSON *snapshotReceiver2Json(SSyncSnapshotReceiver *pReceiver) {
     cJSON_AddStringToObject(pFromId, "addr", u64buf);
     {
       uint64_t u64 = pReceiver->fromId.addr;
-      cJSON   *pTmp = pFromId;
+      cJSON *  pTmp = pFromId;
       char     host[128] = {0};
       uint16_t port;
       syncUtilU642Addr(u64, host, sizeof(host), &port);
@@ -677,14 +677,14 @@ cJSON *snapshotReceiver2Json(SSyncSnapshotReceiver *pReceiver) {
 
 char *snapshotReceiver2Str(SSyncSnapshotReceiver *pReceiver) {
   cJSON *pJson = snapshotReceiver2Json(pReceiver);
-  char  *serialized = cJSON_Print(pJson);
+  char * serialized = cJSON_Print(pJson);
   cJSON_Delete(pJson);
   return serialized;
 }
 
 char *snapshotReceiver2SimpleStr(SSyncSnapshotReceiver *pReceiver, char *event) {
   int32_t len = 256;
-  char   *s = taosMemoryMalloc(len);
+  char *  s = taosMemoryMalloc(len);
 
   SRaftId  fromId = pReceiver->fromId;
   char     host[128];
diff --git a/source/libs/sync/test/syncAppendEntriesBatchTest.cpp b/source/libs/sync/test/syncAppendEntriesBatchTest.cpp
index 515d580b35..f2544d8fec 100644
--- a/source/libs/sync/test/syncAppendEntriesBatchTest.cpp
+++ b/source/libs/sync/test/syncAppendEntriesBatchTest.cpp
@@ -54,15 +54,15 @@ void test1() {
   SyncAppendEntriesBatch *pMsg = createMsg();
   syncAppendEntriesBatchLog2((char *)"==test1==", pMsg);
 
-/*
-  SOffsetAndContLen *metaArr = syncAppendEntriesBatchMetaTableArray(pMsg);
-  int32_t            retArrSize = pMsg->dataCount;
-  for (int i = 0; i < retArrSize; ++i) {
-    SSyncRaftEntry *pEntry = (SSyncRaftEntry*)(pMsg->data + metaArr[i].offset);
-    ASSERT(pEntry->bytes == metaArr[i].contLen);
-    syncEntryPrint(pEntry);
-  }
-*/
+  /*
+    SOffsetAndContLen *metaArr = syncAppendEntriesBatchMetaTableArray(pMsg);
+    int32_t            retArrSize = pMsg->dataCount;
+    for (int i = 0; i < retArrSize; ++i) {
+      SSyncRaftEntry *pEntry = (SSyncRaftEntry*)(pMsg->data + metaArr[i].offset);
+      ASSERT(pEntry->bytes == metaArr[i].contLen);
+      syncEntryPrint(pEntry);
+    }
+  */
 
   syncAppendEntriesBatchDestroy(pMsg);
 }
diff --git a/source/libs/sync/test/syncConfigChangeSnapshotTest.cpp b/source/libs/sync/test/syncConfigChangeSnapshotTest.cpp
index 968baff952..7cd97695f9 100644
--- a/source/libs/sync/test/syncConfigChangeSnapshotTest.cpp
+++ b/source/libs/sync/test/syncConfigChangeSnapshotTest.cpp
@@ -114,7 +114,7 @@ int32_t SnapshotDoRead(struct SSyncFSM* pFsm, void* pReader, void** ppBuf, int32
   return 0;
 }
 
-int32_t SnapshotStartWrite(struct SSyncFSM* pFsm, void *pParam, void** ppWriter) {
+int32_t SnapshotStartWrite(struct SSyncFSM* pFsm, void* pParam, void** ppWriter) {
   *ppWriter = (void*)0xCDEF;
   char logBuf[256] = {0};
   snprintf(logBuf, sizeof(logBuf), "==callback== ==SnapshotStartWrite== pFsm:%p, *ppWriter:%p", pFsm, *ppWriter);
diff --git a/source/libs/sync/test/syncIndexTest.cpp b/source/libs/sync/test/syncIndexTest.cpp
index 8627a6c174..07a05d437e 100644
--- a/source/libs/sync/test/syncIndexTest.cpp
+++ b/source/libs/sync/test/syncIndexTest.cpp
@@ -8,11 +8,10 @@ void print(SHashObj *pNextIndex) {
   printf("----------------\n");
   uint64_t *p = (uint64_t *)taosHashIterate(pNextIndex, NULL);
   while (p) {
-
     size_t len;
-    void*  key = taosHashGetKey(p, &len);
+    void * key = taosHashGetKey(p, &len);
 
-    SRaftId *pRaftId = (SRaftId*)key;
+    SRaftId *pRaftId = (SRaftId *)key;
 
     printf("key:<%lu, %d>, value:%lu \n", pRaftId->addr, pRaftId->vgId, *p);
     p = (uint64_t *)taosHashIterate(pNextIndex, p);
diff --git a/source/libs/sync/test/syncRaftCfgTest.cpp b/source/libs/sync/test/syncRaftCfgTest.cpp
index a3773604fb..2823a7826b 100644
--- a/source/libs/sync/test/syncRaftCfgTest.cpp
+++ b/source/libs/sync/test/syncRaftCfgTest.cpp
@@ -26,6 +26,7 @@ SRaftCfg* createRaftCfg() {
     snprintf(((pCfg->cfg.nodeInfo)[i]).nodeFqdn, sizeof(((pCfg->cfg.nodeInfo)[i]).nodeFqdn), "100.200.300.%d", i);
   }
   pCfg->isStandBy = taosGetTimestampSec() % 100;
+  pCfg->batchSize = taosGetTimestampSec() % 100;
 
   pCfg->configIndexCount = 5;
   for (int i = 0; i < MAX_CONFIG_INDEX_COUNT; ++i) {
@@ -84,6 +85,7 @@ void test3() {
     SRaftCfgMeta meta;
     meta.isStandBy = 7;
     meta.snapshotStrategy = 9;
+    meta.batchSize = 10;
     meta.lastConfigIndex = 789;
     raftCfgCreateFile(pCfg, meta, s);
     printf("%s create json file: %s \n", (char*)__FUNCTION__, s);
@@ -109,6 +111,7 @@ void test5() {
   pCfg->cfg.myIndex = taosGetTimestampSec();
   pCfg->isStandBy += 2;
   pCfg->snapshotStrategy += 3;
+  pCfg->batchSize += 4;
   pCfg->lastConfigIndex += 1000;
 
   pCfg->configIndexCount = 5;
diff --git a/source/libs/sync/test/syncRespMgrTest.cpp b/source/libs/sync/test/syncRespMgrTest.cpp
index fd18109280..93a7ce430f 100644
--- a/source/libs/sync/test/syncRespMgrTest.cpp
+++ b/source/libs/sync/test/syncRespMgrTest.cpp
@@ -74,7 +74,7 @@ void syncRespMgrGetAndDelTest(uint64_t i) {
 }
 
 SSyncNode *createSyncNode() {
-  SSyncNode *pSyncNode = (SSyncNode*)taosMemoryMalloc(sizeof(SSyncNode));
+  SSyncNode *pSyncNode = (SSyncNode *)taosMemoryMalloc(sizeof(SSyncNode));
   memset(pSyncNode, 0, sizeof(SSyncNode));
   return pSyncNode;
 }
diff --git a/source/libs/sync/test/syncSnapshotReceiverTest.cpp b/source/libs/sync/test/syncSnapshotReceiverTest.cpp
index b4bf08dd40..e5d93ddff4 100644
--- a/source/libs/sync/test/syncSnapshotReceiverTest.cpp
+++ b/source/libs/sync/test/syncSnapshotReceiverTest.cpp
@@ -29,7 +29,7 @@ int32_t SnapshotStartRead(struct SSyncFSM* pFsm, void** ppReader) { return 0; }
 int32_t SnapshotStopRead(struct SSyncFSM* pFsm, void* pReader) { return 0; }
 int32_t SnapshotDoRead(struct SSyncFSM* pFsm, void* pReader, void** ppBuf, int32_t* len) { return 0; }
 
-int32_t SnapshotStartWrite(struct SSyncFSM* pFsm, void *pParam, void** ppWriter) { return 0; }
+int32_t SnapshotStartWrite(struct SSyncFSM* pFsm, void* pParam, void** ppWriter) { return 0; }
 int32_t SnapshotStopWrite(struct SSyncFSM* pFsm, void* pWriter, bool isApply) { return 0; }
 int32_t SnapshotDoWrite(struct SSyncFSM* pFsm, void* pWriter, void* pBuf, int32_t len) { return 0; }
 
diff --git a/source/libs/sync/test/syncTestTool.cpp b/source/libs/sync/test/syncTestTool.cpp
index c6d3a3e4af..2c08910aa8 100644
--- a/source/libs/sync/test/syncTestTool.cpp
+++ b/source/libs/sync/test/syncTestTool.cpp
@@ -111,7 +111,7 @@ int32_t SnapshotDoRead(struct SSyncFSM* pFsm, void* pReader, void** ppBuf, int32
   return 0;
 }
 
-int32_t SnapshotStartWrite(struct SSyncFSM* pFsm, void *pParam, void** ppWriter) {
+int32_t SnapshotStartWrite(struct SSyncFSM* pFsm, void* pParam, void** ppWriter) {
   *ppWriter = (void*)0xCDEF;
   char logBuf[256] = {0};
 
@@ -314,18 +314,18 @@ int main(int argc, char** argv) {
     exit(-1);
   }
 
-  int32_t replicaNum = atoi(argv[1]);
-  int32_t myIndex = atoi(argv[2]);
-  ESyncStrategy    enableSnapshot = (ESyncStrategy)atoi(argv[3]);
-  int32_t lastApplyIndex = atoi(argv[4]);
-  int32_t lastApplyTerm = atoi(argv[5]);
-  int32_t writeRecordNum = atoi(argv[6]);
-  bool    isStandBy = atoi(argv[7]);
-  int32_t isConfigChange = atoi(argv[8]);
-  int32_t iterTimes = atoi(argv[9]);
-  int32_t finishLastApplyIndex = atoi(argv[10]);
-  int32_t finishLastApplyTerm = atoi(argv[11]);
-  int32_t leaderTransfer = atoi(argv[12]);
+  int32_t       replicaNum = atoi(argv[1]);
+  int32_t       myIndex = atoi(argv[2]);
+  ESyncStrategy enableSnapshot = (ESyncStrategy)atoi(argv[3]);
+  int32_t       lastApplyIndex = atoi(argv[4]);
+  int32_t       lastApplyTerm = atoi(argv[5]);
+  int32_t       writeRecordNum = atoi(argv[6]);
+  bool          isStandBy = atoi(argv[7]);
+  int32_t       isConfigChange = atoi(argv[8]);
+  int32_t       iterTimes = atoi(argv[9]);
+  int32_t       finishLastApplyIndex = atoi(argv[10]);
+  int32_t       finishLastApplyTerm = atoi(argv[11]);
+  int32_t       leaderTransfer = atoi(argv[12]);
 
   sInfo(
       "args: replicaNum:%d, myIndex:%d, enableSnapshot:%d, lastApplyIndex:%d, lastApplyTerm:%d, writeRecordNum:%d, "