diff --git a/include/libs/stream/streamState.h b/include/libs/stream/streamState.h
index 86e4144687..f7c022924a 100644
--- a/include/libs/stream/streamState.h
+++ b/include/libs/stream/streamState.h
@@ -133,6 +133,10 @@ int32_t streamStateGetParName(SStreamState* pState, int64_t groupId, void** pVal
 
 /***compare func **/
 
+typedef struct SStateChekpoint {
+  char*   taskName;
+  int64_t checkpointId;
+} SStateChekpoint;
 // todo refactor
 typedef struct SStateKey {
   SWinKey key;
diff --git a/source/libs/stream/inc/streamBackendRocksdb.h b/source/libs/stream/inc/streamBackendRocksdb.h
index d9f0dd41a0..a06aef365f 100644
--- a/source/libs/stream/inc/streamBackendRocksdb.h
+++ b/source/libs/stream/inc/streamBackendRocksdb.h
@@ -85,4 +85,8 @@ void    streamStateDestroyBatch(void* pBatch);
 int32_t streamStatePutBatch(SStreamState* pState, const char* cfName, rocksdb_writebatch_t* pBatch, void* key,
                             void* val, int32_t vlen);
 int32_t streamStatePutBatch_rocksdb(SStreamState* pState, void* pBatch);
+
+int32_t streamDefaultPut_rocksdb(SStreamState* pState, const void* key, void* pVal, int32_t pVLen);
+int32_t streamDefaultGet_rocksdb(SStreamState* pState, const void* key, void** pVal, int32_t* pVLen);
+int32_t streamDefaultDel_rocksdb(SStreamState* pState, const void* key);
 #endif
\ No newline at end of file
diff --git a/source/libs/stream/src/streamStateRocksdb.c b/source/libs/stream/src/streamStateRocksdb.c
index 9dc84db37c..e700e8b97a 100644
--- a/source/libs/stream/src/streamStateRocksdb.c
+++ b/source/libs/stream/src/streamStateRocksdb.c
@@ -16,6 +16,25 @@
 #include "streamBackendRocksdb.h"
 #include "tcommon.h"
 #include "tlog.h"
+
+int defaultKeyComp(void* state, const char* aBuf, size_t aLen, const char* bBuf, size_t bLen) {
+  //
+  return memcmp(aBuf, bBuf, aLen);
+}
+int defaultKeyEncode(void* k, char* buf) {
+  int len = strlen((char*)k);
+  memcpy(buf, (char*)k, len);
+  return len;
+}
+int defaultKeyDecode(void* k, char* buf) {
+  int len = strlen(buf);
+  memcpy(k, buf, len);
+  return len;
+}
+int defaultKeyToString(void* k, char* buf) {
+  // just to debug
+  return sprintf(buf, "key: %s", (char*)k);
+}
 //
 //  SStateKey
 //  |--groupid--|---ts------|--opNum----|
@@ -261,38 +280,57 @@ int parKeyToString(void* k, char* buf) {
   return n;
 }
 
-const char* cfName[] = {"default", "fill", "sess", "func", "parname", "partag"};
+const char* cfName[] = {"default", "state", "fill", "sess", "func", "parname", "partag"};
+
 typedef int (*EncodeFunc)(void* key, char* buf);
 typedef int (*DecodeFunc)(void* key, char* buf);
 typedef int (*ToStringFunc)(void* key, char* buf);
-////typedef int32_t (*BackendCmpFunc)(void* state, const char* aBuf, size_t aLen, const char* bBuf, size_t bLen);
-////typedef const char* (*BackendCmpNameFunc)(void* statue);
+typedef const char* (*CompareName)(void* statue);
+typedef int (*BackendCmpFunc)(void* state, const char* aBuf, size_t aLen, const char* bBuf, size_t bLen);
+typedef void (*DestroyFunc)(void* state);
+
+const char* compareDefaultName(void* name);
+const char* compareStateName(void* name);
+const char* compareWinKeyName(void* name);
+const char* compareSessionKeyName(void* name);
+const char* compareFuncKeyName(void* name);
+const char* compareParKeyName(void* name);
+const char* comparePartagKeyName(void* name);
 
 typedef struct {
-  const char*  key;
-  int32_t      len;
-  int          idx;
-  EncodeFunc   enFunc;
-  DecodeFunc   deFunc;
-  ToStringFunc toStrFunc;
+  const char*    key;
+  int32_t        len;
+  int            idx;
+  BackendCmpFunc cmpFunc;
+  EncodeFunc     enFunc;
+  DecodeFunc     deFunc;
+  ToStringFunc   toStrFunc;
+  CompareName    cmpName;
+  DestroyFunc    detroyFunc;
+
 } SCfInit;
 
 SCfInit ginitDict[] = {
-    {"default", strlen("default"), 0, stateKeyEncode, stateKeyDecode, stateKeyToString},
-    {"fill", strlen("fill"), 1, winKeyEncode, winKeyDecode, winKeyToString},
-    {"sess", strlen("sess"), 2, stateSessionKeyEncode, stateSessionKeyDecode, stateSessionKeyToString},
-    {"func", strlen("func"), 3, tupleKeyEncode, tupleKeyDecode, tupleKeyToString},
-    {"parname", strlen("parname"), 4, parKeyEncode, parKeyDecode, parKeyToString},
-    {"partag", strlen("partag"), 5, parKeyEncode, parKeyDecode, parKeyToString},
+    {"default", strlen("default"), 0, defaultKeyComp, defaultKeyEncode, defaultKeyDecode, defaultKeyToString,
+     compareDefaultName},
+    {"state", strlen("state"), 1, stateKeyDBComp, stateKeyEncode, stateKeyDecode, stateKeyToString, compareStateName},
+    {"fill", strlen("fill"), 2, winKeyDBComp, winKeyEncode, winKeyDecode, winKeyToString, compareWinKeyName},
+    {"sess", strlen("sess"), 3, stateSessionKeyDBComp, stateSessionKeyEncode, stateSessionKeyDecode,
+     stateSessionKeyToString, compareSessionKeyName},
+    {"func", strlen("func"), 4, tupleKeyDBComp, tupleKeyEncode, tupleKeyDecode, tupleKeyToString, compareFuncKeyName},
+    {"parname", strlen("parname"), 5, parKeyDBComp, parKeyEncode, parKeyDecode, parKeyToString, compareParKeyName},
+    {"partag", strlen("partag"), 6, parKeyDBComp, parKeyEncode, parKeyDecode, parKeyToString, comparePartagKeyName},
 };
 
-const char* compareStateName(void* name) { return cfName[0]; }
-const char* compareWinKeyName(void* name) { return cfName[1]; }
-const char* compareSessionKey(void* name) { return cfName[2]; }
-const char* compareFuncKey(void* name) { return cfName[3]; }
-const char* compareParKey(void* name) { return cfName[4]; }
-const char* comparePartagKey(void* name) { return cfName[5]; }
-void        destroyFunc(void* stata) { return; }
+const char* compareDefaultName(void* name) { return ginitDict[0].key; }
+const char* compareStateName(void* name) { return ginitDict[1].key; }
+const char* compareWinKeyName(void* name) { return ginitDict[2].key; }
+const char* compareSessionKeyName(void* name) { return ginitDict[3].key; }
+const char* compareFuncKeyName(void* name) { return ginitDict[4].key; }
+const char* compareParKeyName(void* name) { return ginitDict[5].key; }
+const char* comparePartagKeyName(void* name) { return ginitDict[6].key; }
+
+void destroyFunc(void* stata) { return; }
 
 int streamInitBackend(SStreamState* pState, char* path) {
   rocksdb_env_t* env = rocksdb_create_default_env();  // rocksdb_envoptions_create();
@@ -309,11 +347,12 @@ int streamInitBackend(SStreamState* pState, char* path) {
   rocksdb_options_set_write_buffer_size(opts, 128 << 20);
 
   char* err = NULL;
-  int   cfLen = sizeof(cfName) / sizeof(cfName[0]);
+  int   cfLen = sizeof(ginitDict) / sizeof(ginitDict[0]);
 
   const rocksdb_options_t** cfOpt = taosMemoryCalloc(cfLen, sizeof(rocksdb_options_t*));
   for (int i = 0; i < cfLen; i++) {
     cfOpt[i] = rocksdb_options_create_copy(opts);
+    // refactor later
     rocksdb_block_based_table_options_t* tableOpt = rocksdb_block_based_options_create();
     rocksdb_cache_t*                     cache = rocksdb_cache_create_lru(128 << 20);
     rocksdb_block_based_options_set_block_cache(tableOpt, cache);
@@ -328,31 +367,12 @@ int streamInitBackend(SStreamState* pState, char* path) {
   };
 
   rocksdb_comparator_t** pCompare = taosMemoryCalloc(cfLen, sizeof(rocksdb_comparator_t**));
-
-  rocksdb_comparator_t* stateCompare = rocksdb_comparator_create(NULL, destroyFunc, stateKeyDBComp, compareStateName);
-  rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[0], stateCompare);
-  pCompare[0] = stateCompare;
-
-  rocksdb_comparator_t* fillCompare = rocksdb_comparator_create(NULL, destroyFunc, winKeyDBComp, compareWinKeyName);
-  rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[1], fillCompare);
-  pCompare[1] = fillCompare;
-
-  rocksdb_comparator_t* sessCompare =
-      rocksdb_comparator_create(NULL, destroyFunc, stateSessionKeyDBComp, compareSessionKey);
-  rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[2], sessCompare);
-  pCompare[2] = sessCompare;
-
-  rocksdb_comparator_t* funcCompare = rocksdb_comparator_create(NULL, destroyFunc, tupleKeyDBComp, compareFuncKey);
-  rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[3], funcCompare);
-  pCompare[3] = funcCompare;
-
-  rocksdb_comparator_t* parnameCompare = rocksdb_comparator_create(NULL, destroyFunc, parKeyDBComp, compareParKey);
-  rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[4], parnameCompare);
-  pCompare[4] = parnameCompare;
-
-  rocksdb_comparator_t* partagCompare = rocksdb_comparator_create(NULL, destroyFunc, parKeyDBComp, comparePartagKey);
-  rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[5], partagCompare);
-  pCompare[5] = partagCompare;
+  for (int i = 0; i < cfLen; i++) {
+    SCfInit*              cf = &ginitDict[i];
+    rocksdb_comparator_t* compare = rocksdb_comparator_create(NULL, cf->detroyFunc, cf->cmpFunc, cf->cmpName);
+    rocksdb_options_set_comparator((rocksdb_options_t*)cfOpt[i], compare);
+    pCompare[i] = compare;
+  }
 
   rocksdb_column_family_handle_t** cfHandle = taosMemoryMalloc(cfLen * sizeof(rocksdb_column_family_handle_t*));
   rocksdb_t*                       db = rocksdb_open_column_families(opts, path, cfLen, cfName, cfOpt, cfHandle, &err);
@@ -373,7 +393,7 @@ void streamCleanBackend(SStreamState* pState) {
     qInfo("rocksdb already free");
     return;
   }
-  int cfLen = sizeof(cfName) / sizeof(cfName[0]);
+  int cfLen = sizeof(ginitDict) / sizeof(ginitDict[0]);
   for (int i = 0; i < cfLen; i++) {
     rocksdb_column_family_handle_destroy(pState->pTdbState->pHandle[i]);
     rocksdb_options_destroy(pState->pTdbState->cfOpts[i]);
@@ -540,7 +560,7 @@ int32_t streamStatePut_rocksdb(SStreamState* pState, const SWinKey* key, const v
   int code = 0;
 
   SStateKey sKey = {.key = *key, .opNum = pState->number};
-  STREAM_STATE_PUT_ROCKSDB(pState, "default", &sKey, value, vLen);
+  STREAM_STATE_PUT_ROCKSDB(pState, "state", &sKey, value, vLen);
   return code;
 }
 int32_t streamStatePutBatch_rocksdb(SStreamState* pState, void* pBatch) {
@@ -581,17 +601,34 @@ int32_t streamStatePutBatch(SStreamState* pState, const char* cfName, rocksdb_wr
   rocksdb_writebatch_put_cf((rocksdb_writebatch_t*)pBatch, pCf, buf, (size_t)klen, val, (size_t)vlen);
   return 0;
 }
+
+int32_t streamDefaultPut_rocksdb(SStreamState* pState, const void* key, void* pVal, int32_t pVLen) {
+  int code = 0;
+  STREAM_STATE_PUT_ROCKSDB(pState, "default", &key, pVal, pVLen);
+  return code;
+}
+int32_t streamDefaultGet_rocksdb(SStreamState* pState, const void* key, void** pVal, int32_t* pVLen) {
+  int code = 0;
+  STREAM_STATE_GET_ROCKSDB(pState, "default", &key, pVal, pVLen);
+  return code;
+}
+int32_t streamDefaultDel_rocksdb(SStreamState* pState, const void* key) {
+  int code = 0;
+  STREAM_STATE_DEL_ROCKSDB(pState, "default", &key);
+  return code;
+}
+
 int32_t streamStateGet_rocksdb(SStreamState* pState, const SWinKey* key, void** pVal, int32_t* pVLen) {
   int       code = 0;
   SStateKey sKey = {.key = *key, .opNum = pState->number};
-  STREAM_STATE_GET_ROCKSDB(pState, "default", &sKey, pVal, pVLen);
+  STREAM_STATE_GET_ROCKSDB(pState, "state", &sKey, pVal, pVLen);
   return code;
 }
 // todo refactor
 int32_t streamStateDel_rocksdb(SStreamState* pState, const SWinKey* key) {
   int       code = 0;
   SStateKey sKey = {.key = *key, .opNum = pState->number};
-  STREAM_STATE_DEL_ROCKSDB(pState, "default", &sKey);
+  STREAM_STATE_DEL_ROCKSDB(pState, "state", &sKey);
   return code;
 }
 
@@ -638,7 +675,7 @@ int32_t streamStateClear_rocksdb(SStreamState* pState) {
                           sKeyStr, sLen, eKeyStr, eLen, &err);
   // rocksdb_compact_range_cf(pState->pTdbState->rocksdb, pState->pTdbState->pHandle[0], sKeyStr, sLen, eKeyStr, eLen);
   if (err != NULL) {
-    qWarn("failed to delete range cf(default) err: %s, start: %s, end:%s", err, toStringStart, toStringEnd);
+    qWarn("failed to delete range cf(state) err: %s, start: %s, end:%s", err, toStringStart, toStringEnd);
     taosMemoryFree(err);
   }
 
@@ -653,7 +690,7 @@ int32_t streamStateClear_rocksdb(SStreamState* pState) {
   // streamStatePut_rocksdb(pState, &key, s, strlen(s));
 
   // rocksdb_readoptions_t* opt = NULL;
-  // rocksdb_iterator_t*    iter = streamStateIterCreate(pState, "default", NULL, &opt);
+  // rocksdb_iterator_t*    iter = streamStateIterCreate(pState, "state", NULL, &opt);
   // rocksdb_iter_seek(iter, buf, sLen);
 
   // char* err = NULL;
@@ -804,7 +841,7 @@ SStreamStateCur* streamStateGetCur_rocksdb(SStreamState* pState, const SWinKey*
 
   if (pCur == NULL) return NULL;
   pCur->db = pState->pTdbState->rocksdb;
-  pCur->iter = streamStateIterCreate(pState, "default", &pCur->snapshot, &pCur->readOpt);
+  pCur->iter = streamStateIterCreate(pState, "state", &pCur->snapshot, &pCur->readOpt);
 
   SStateKey sKey = {.key = *key, .opNum = pState->number};
   char      buf[128] = {0};
@@ -973,7 +1010,7 @@ SStreamStateCur* streamStateSeekKeyNext_rocksdb(SStreamState* pState, const SWin
   }
   pCur->number = pState->number;
   pCur->db = pState->pTdbState->rocksdb;
-  pCur->iter = streamStateIterCreate(pState, "default", &pCur->snapshot, &pCur->readOpt);
+  pCur->iter = streamStateIterCreate(pState, "state", &pCur->snapshot, &pCur->readOpt);
 
   SStateKey sKey = {.key = *key, .opNum = pState->number};
   char      buf[128] = {0};
diff --git a/source/libs/stream/src/tstreamFileState.c b/source/libs/stream/src/tstreamFileState.c
index 34d4fa9d5f..dedf2b114f 100644
--- a/source/libs/stream/src/tstreamFileState.c
+++ b/source/libs/stream/src/tstreamFileState.c
@@ -57,11 +57,11 @@ SStreamFileState* streamFileStateInit(int64_t memSize, uint32_t keySize, uint32_
   if (!pFileState) {
     goto _error;
   }
-  pFileState->maxRowCount = TMAX( (uint64_t)memSize / rowSize, FLUSH_NUM * 2);
+  pFileState->maxRowCount = TMAX((uint64_t)memSize / rowSize, FLUSH_NUM * 2);
   pFileState->usedBuffs = tdListNew(POINTER_BYTES);
   pFileState->freeBuffs = tdListNew(POINTER_BYTES);
   _hash_fn_t hashFn = taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY);
-  int32_t cap = TMIN(10240, pFileState->maxRowCount);
+  int32_t    cap = TMIN(10240, pFileState->maxRowCount);
   pFileState->rowBuffMap = tSimpleHashInit(cap, hashFn);
   if (!pFileState->usedBuffs || !pFileState->freeBuffs || !pFileState->rowBuffMap) {
     goto _error;
@@ -342,12 +342,11 @@ int32_t flushSnapshot(SStreamFileState* pFileState, SStreamSnapshot* pSnapshot,
     }
 
     SStateKey sKey = {.key = *((SWinKey*)pPos->pKey), .opNum = ((SStreamState*)pFileState->pFileStore)->number};
-    code = streamStatePutBatch(pFileState->pFileStore, "default", batch, &sKey, pPos->pRowBuff, pFileState->rowSize);
+    code = streamStatePutBatch(pFileState->pFileStore, "state", batch, &sKey, pPos->pRowBuff, pFileState->rowSize);
   }
   if (streamStateGetBatchSize(batch) > 0) {
     code = streamStatePutBatch_rocksdb(pFileState->pFileStore, batch);
   }
-  streamStateDestroyBatch(batch);
 
   if (flushState) {
     int32_t len = 0;
@@ -357,6 +356,8 @@ int32_t flushSnapshot(SStreamFileState* pFileState, SStreamSnapshot* pSnapshot,
     streamStatePut_rocksdb(pFileState->pFileStore, &key, buff, len);
     taosMemoryFree(buff);
   }
+
+  streamStateDestroyBatch(batch);
   return code;
 }