enh: skip WAL forceSync for single replica vgroup

include/libs/sync/sync.h

@@ -193,7 +193,7 @@ typedef struct SSyncLogStore {
   SyncIndex (*syncLogLastIndex)(struct SSyncLogStore* pLogStore);
   SyncTerm (*syncLogLastTerm)(struct SSyncLogStore* pLogStore);
 
-  int32_t (*syncLogAppendEntry)(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry);
+  int32_t (*syncLogAppendEntry)(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry, bool forcSync);
   int32_t (*syncLogGetEntry)(struct SSyncLogStore* pLogStore, SyncIndex index, SSyncRaftEntry** ppEntry);
   int32_t (*syncLogTruncate)(struct SSyncLogStore* pLogStore, SyncIndex fromIndex);
 

source/libs/sync/src/syncAppendEntries.c

@@ -357,7 +357,7 @@ int32_t syncNodeOnAppendEntriesOld(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
         ASSERT(pAppendEntry->index == appendIndex);
 
         // append
-        code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pAppendEntry);
+        code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pAppendEntry, false);
         if (code != 0) {
           char logBuf[128];
           snprintf(logBuf, sizeof(logBuf), "ignore, append error, append-index:%" PRId64, appendIndex);
@@ -398,7 +398,7 @@ int32_t syncNodeOnAppendEntriesOld(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
         }
 
         // append
-        code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pAppendEntry);
+        code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pAppendEntry, false);
         if (code != 0) {
           char logBuf[128];
           snprintf(logBuf, sizeof(logBuf), "ignore, log not exist, append error, append-index:%" PRId64, appendIndex);

source/libs/sync/src/syncMain.c

@@ -2478,7 +2478,7 @@ static int32_t syncNodeAppendNoopOld(SSyncNode* ths) {
   LRUHandle* h = NULL;
 
   if (ths->state == TAOS_SYNC_STATE_LEADER) {
-    int32_t code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pEntry);
+    int32_t code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pEntry, false);
     if (code != 0) {
       sError("append noop error");
       return -1;
@@ -2721,7 +2721,7 @@ int32_t syncNodeOnClientRequestOld(SSyncNode* ths, SRpcMsg* pMsg, SyncIndex* pRe
 
   if (ths->state == TAOS_SYNC_STATE_LEADER) {
     // append entry
-    code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pEntry);
+    code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pEntry, false);
     if (code != 0) {
       if (ths->replicaNum == 1) {
         if (h) {

source/libs/sync/src/syncPipeline.c

@@ -364,7 +364,11 @@ _out:
   return ret;
 }
 
-int32_t syncLogStorePersist(SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry) {
+static inline bool syncLogStoreNeedFlush(SSyncRaftEntry* pEntry, int32_t replicaNum) {
+  return (replicaNum > 1) && (pEntry->originalRpcType == TDMT_VND_COMMIT);
+}
+
+int32_t syncLogStorePersist(SSyncLogStore* pLogStore, SSyncNode* pNode, SSyncRaftEntry* pEntry) {
   ASSERT(pEntry->index >= 0);
   SyncIndex lastVer = pLogStore->syncLogLastIndex(pLogStore);
   if (lastVer >= pEntry->index && pLogStore->syncLogTruncate(pLogStore, pEntry->index) < 0) {
@@ -374,7 +378,8 @@ int32_t syncLogStorePersist(SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry) {
   lastVer = pLogStore->syncLogLastIndex(pLogStore);
   ASSERT(pEntry->index == lastVer + 1);
 
-  if (pLogStore->syncLogAppendEntry(pLogStore, pEntry) < 0) {
+  bool doFsync = syncLogStoreNeedFlush(pEntry, pNode->replicaNum);
+  if (pLogStore->syncLogAppendEntry(pLogStore, pEntry, doFsync) < 0) {
     sError("failed to append sync log entry since %s. index:%" PRId64 ", term:%" PRId64 "", terrstr(), pEntry->index,
            pEntry->term);
     return -1;
@@ -436,7 +441,7 @@ int64_t syncLogBufferProceed(SSyncLogBuffer* pBuf, SSyncNode* pNode, SyncTerm* p
     (void)syncNodeReplicateWithoutLock(pNode);
 
     // persist
-    if (syncLogStorePersist(pLogStore, pEntry) < 0) {
+    if (syncLogStorePersist(pLogStore, pNode, pEntry) < 0) {
       sError("vgId:%d, failed to persist sync log entry from buffer since %s. index:%" PRId64, pNode->vgId, terrstr(),
              pEntry->index);
       goto _out;

source/libs/sync/src/syncRaftLog.c

@@ -23,7 +23,7 @@
 
 // public function
 static int32_t   raftLogRestoreFromSnapshot(struct SSyncLogStore* pLogStore, SyncIndex snapshotIndex);
-static int32_t   raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry);
+static int32_t   raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry, bool forceSync);
 static int32_t   raftLogTruncate(struct SSyncLogStore* pLogStore, SyncIndex fromIndex);
 static bool      raftLogExist(struct SSyncLogStore* pLogStore, SyncIndex index);
 static int32_t   raftLogUpdateCommitIndex(SSyncLogStore* pLogStore, SyncIndex index);
@@ -192,9 +192,7 @@ SyncTerm raftLogLastTerm(struct SSyncLogStore* pLogStore) {
   return SYNC_TERM_INVALID;
 }
 
-static inline bool raftLogForceSync(SSyncRaftEntry* pEntry) { return (pEntry->originalRpcType == TDMT_VND_COMMIT); }
-
-static int32_t raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry) {
+static int32_t raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry, bool forceSync) {
   SSyncLogStoreData* pData = pLogStore->data;
   SWal*              pWal = pData->pWal;
 
@@ -221,7 +219,6 @@ static int32_t raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntr
 
   ASSERT(pEntry->index == index);
 
-  bool forceSync = raftLogForceSync(pEntry);
   walFsync(pWal, forceSync);
 
   sNTrace(pData->pSyncNode, "write index:%" PRId64 ", type:%s, origin type:%s, elapsed:%" PRId64, pEntry->index,