cache/commit: flush cache when tsdb commits data

source/dnode/vnode/src/inc/tsdb.h

@@ -346,6 +346,7 @@ struct STsdbFS {
 typedef struct {
   rocksdb_t              *db;
   rocksdb_options_t      *options;
+  rocksdb_flushoptions_t *flushoptions;
   rocksdb_writeoptions_t *writeoptions;
   rocksdb_readoptions_t  *readoptions;
   rocksdb_writebatch_t   *writebatch;

source/dnode/vnode/src/inc/vnodeInt.h

@@ -178,6 +178,7 @@ int     tsdbClose(STsdb** pTsdb);
 int32_t tsdbBegin(STsdb* pTsdb);
 int32_t tsdbPrepareCommit(STsdb* pTsdb);
 int32_t tsdbCommit(STsdb* pTsdb, SCommitInfo* pInfo);
+int32_t tsdbCacheCommit(STsdb* pTsdb);
 int32_t tsdbCompact(STsdb* pTsdb, SCompactInfo* pInfo);
 int32_t tsdbFinishCommit(STsdb* pTsdb);
 int32_t tsdbRollbackCommit(STsdb* pTsdb);
@@ -194,9 +195,9 @@ STQ* tqOpen(const char* path, SVnode* pVnode);
 void tqClose(STQ*);
 int  tqPushMsg(STQ*, void* msg, int32_t msgLen, tmsg_t msgType, int64_t ver);
 int  tqRegisterPushHandle(STQ* pTq, void* pHandle, const SMqPollReq* pRequest, SRpcMsg* pRpcMsg, SMqDataRsp* pDataRsp,
-                         int32_t type);
+                          int32_t type);
 int  tqUnregisterPushHandle(STQ* pTq, const char* pKey, int32_t keyLen, uint64_t consumerId, bool rspConsumer);
-int  tqStartStreamTasks(STQ* pTq);    // restore all stream tasks after vnode launching completed.
+int  tqStartStreamTasks(STQ* pTq);  // restore all stream tasks after vnode launching completed.
 
 int     tqCommit(STQ*);
 int32_t tqUpdateTbUidList(STQ* pTq, const SArray* tbUidList, bool isAdd);

source/dnode/vnode/src/tsdb/tsdbCache.c

@@ -98,12 +98,19 @@ static int32_t tsdbOpenRocksCache(STsdb *pTsdb) {
     goto _err3;
   }
 
+  rocksdb_flushoptions_t *flushoptions = rocksdb_flushoptions_create();
+  if (NULL == flushoptions) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _err4;
+  }
+
   rocksdb_writebatch_t *writebatch = rocksdb_writebatch_create();
 
   pTsdb->rCache.writebatch = writebatch;
   pTsdb->rCache.options = options;
   pTsdb->rCache.writeoptions = writeoptions;
   pTsdb->rCache.readoptions = readoptions;
+  pTsdb->rCache.flushoptions = flushoptions;
   pTsdb->rCache.db = db;
 
   taosThreadMutexInit(&pTsdb->rCache.rMutex, NULL);
@@ -122,6 +129,7 @@ _err:
 
 static void tsdbCloseRocksCache(STsdb *pTsdb) {
   rocksdb_close(pTsdb->rCache.db);
+  rocksdb_flushoptions_destroy(pTsdb->rCache.flushoptions);
   rocksdb_writebatch_destroy(pTsdb->rCache.writebatch);
   rocksdb_readoptions_destroy(pTsdb->rCache.readoptions);
   rocksdb_writeoptions_destroy(pTsdb->rCache.writeoptions);
@@ -129,6 +137,20 @@ static void tsdbCloseRocksCache(STsdb *pTsdb) {
   taosThreadMutexDestroy(&pTsdb->rCache.rMutex);
 }
 
+int32_t tsdbCacheCommit(STsdb *pTsdb) {
+  int32_t code = 0;
+  char   *err = NULL;
+
+  rocksdb_flush(pTsdb->rCache.db, pTsdb->rCache.flushoptions, &err);
+  if (NULL != err) {
+    tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, __LINE__, err);
+    rocksdb_free(err);
+    code = -1;
+  }
+
+  return code;
+}
+
 SLastCol *tsdbCacheDeserialize(char const *value) {
   if (!value) {
     return NULL;

source/dnode/vnode/src/vnd/vnodeCommit.c

@@ -144,8 +144,8 @@ _exit:
 }
 
 int vnodeShouldCommit(SVnode *pVnode, bool atExit) {
-  bool           diskAvail = osDataSpaceAvailable();
-  bool           needCommit = false;
+  bool diskAvail = osDataSpaceAvailable();
+  bool needCommit = false;
 
   taosThreadMutexLock(&pVnode->mutex);
   if (pVnode->inUse && diskAvail) {
@@ -439,6 +439,9 @@ static int vnodeCommitImpl(SCommitInfo *pInfo) {
   code = tsdbCommit(pVnode->pTsdb, pInfo);
   TSDB_CHECK_CODE(code, lino, _exit);
 
+  code = tsdbCacheCommit(pVnode->pTsdb);
+  TSDB_CHECK_CODE(code, lino, _exit);
+
   if (VND_IS_RSMA(pVnode)) {
     code = smaCommit(pVnode->pSma, pInfo);
     TSDB_CHECK_CODE(code, lino, _exit);