diff --git a/source/libs/stream/src/streamStateRocksdb.c b/source/libs/stream/src/streamStateRocksdb.c
index b51e0fd811..c92486522b 100644
--- a/source/libs/stream/src/streamStateRocksdb.c
+++ b/source/libs/stream/src/streamStateRocksdb.c
@@ -381,7 +381,7 @@ const char* compareParKeyName(void* name) { return ginitDict[5].key; }
 const char* comparePartagKeyName(void* name) { return ginitDict[6].key; }
 
 int streamStateOpenBackend(void* backend, SStreamState* pState) {
-  qError("start to open backend, %p, %d-%d", pState, pState->streamId, pState->taskId);
+  qInfo("start to open backend, %p, %d-%d", pState, pState->streamId, pState->taskId);
   SBackendHandle* handle = backend;
 
   char* err = NULL;
@@ -437,12 +437,11 @@ int streamStateOpenBackend(void* backend, SStreamState* pState) {
   pState->pTdbState->pComparNode = streamBackendAddCompare(handle, &compare);
 
   rocksdb_writeoptions_disable_WAL(pState->pTdbState->writeOpts, 1);
-  qError("end to open backend, %p", pState);
   return 0;
 }
 void streamStateCloseBackend(SStreamState* pState, bool remove) {
   char* status[] = {"remove", "drop"};
-  qError("start to %s backend, %p, %d-%d", status[remove == false ? 1 : 0], pState, pState->streamId, pState->taskId);
+  qInfo("start to %s backend, %p, %d-%d", status[remove == false ? 1 : 0], pState, pState->streamId, pState->taskId);
   if (pState->pTdbState->rocksdb == NULL) {
     return;
   }
@@ -723,49 +722,6 @@ char* streamDefaultIterVal_rocksdb(void* iter, int32_t* len) {
   SStreamStateCur* pCur = iter;
   return (char*)rocksdb_iter_value(pCur->iter, (size_t*)len);
 }
-// typedef struct {
-//   char* start;
-//   char* end;
-//   void* result;
-// } StreamFilterArg;
-
-// typedef int (*streamfilterFunc)(StreamFilterArg* arg);
-
-// int32_t streamDefaultIterFilter_rocksdb(SStreamState* pState, streamfilterFunc filterFunc, StreamFilterArg* arg) {
-//   int   code = 0;
-//   char* err = NULL;
-
-//   rocksdb_snapshot_t*    snapshot = NULL;
-//   rocksdb_readoptions_t* readopts = NULL;
-//   rocksdb_iterator_t*    pIter = streamStateIterCreate(pState, "default", &snapshot, &readopts);
-//   if (pIter == NULL) {
-//     return -1;
-//   }
-//   char*   start = arg->start;
-//   char*   end = arg->end;
-//   SArray* result = arg->result;
-
-//   rocksdb_iter_seek(pIter, start, strlen(start));
-//   while (rocksdb_iter_valid(pIter)) {
-//     const char* key = rocksdb_iter_key(pIter, NULL);
-//     if (end != NULL && strcmp(key, end) > 0) {
-//       break;
-//     }
-//     if (strncmp(key, start, strlen(start)) == 0 && strlen(key) >= strlen(start) + 1) {
-//       int64_t checkPoint = 0;
-//       // if (sscanf(key + strlen(key), ":%" PRId64 "", &checkPoint) == 1) {
-//       //   taosArrayPush(result, &checkPoint);
-//       // }
-//     } else {
-//       break;
-//     }
-//     rocksdb_iter_next(pIter);
-//   }
-//   rocksdb_release_snapshot(pState->pTdbState->rocksdb, snapshot);
-//   rocksdb_readoptions_destroy(readopts);
-//   rocksdb_iter_destroy(pIter);
-//   return code;
-// }
 int32_t streamDefaultIterGet_rocksdb(SStreamState* pState, const void* start, const void* end, SArray* result) {
   int   code = 0;
   char* err = NULL;
@@ -860,43 +816,6 @@ int32_t streamStateClear_rocksdb(SStreamState* pState) {
     taosMemoryFree(err);
   }
 
-  // del one by one
-
-  // char      buf[128] = {0};
-  // char*     s = "null";
-  // SWinKey   key = {.ts = 0, .groupId = 0};
-  // SStateKey skey = {.key = key, .opNum = pState->number};
-  // int       sLen = stateKeyEncode(&skey, buf);
-
-  // streamStatePut_rocksdb(pState, &key, s, strlen(s));
-
-  // rocksdb_readoptions_t* opt = NULL;
-  // rocksdb_iterator_t*    iter = streamStateIterCreate(pState, "state", NULL, &opt);
-  // rocksdb_iter_seek(iter, buf, sLen);
-
-  // char* err = NULL;
-  // while (rocksdb_iter_valid(iter)) {
-  //   int32_t kLen = 0;
-  //   char*   key = (char*)rocksdb_iter_key(iter, (size_t*)&kLen);
-
-  //   SStateKey ckey = {0};
-  //   stateKeyDecode((void*)&ckey, key);
-  //   if (ckey.opNum != pState->number) {
-  //     break;
-  //   }
-  //   if (stateKeyCmpr(&skey, sizeof(skey), &ckey, sizeof(ckey)) > 0) {
-  //     break;
-  //   }
-
-  //   rocksdb_delete_cf(pState->pTdbState->rocksdb, pState->pTdbState->writeOpts, pState->pTdbState->pHandle[0], key,
-  //                     kLen, &err);
-  //   if (err != NULL) {
-  //     taosMemoryFree(err);
-  //   }
-  //   if (rocksdb_iter_valid(iter)) rocksdb_iter_next(iter);
-  // }
-  // rocksdb_iter_destroy(iter);
-
   return 0;
 }