diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index e516bddac1..faee6cc2fa 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -1713,7 +1713,7 @@ void blockDebugShowDataBlocks(const SArray* dataBlocks, const char* flag) {
     size_t       numOfCols = taosArrayGetSize(pDataBlock->pDataBlock);
 
     int32_t rows = pDataBlock->info.rows;
-    printf("%s |block type %d |child id %d|group id %zX\n", flag, (int32_t)pDataBlock->info.type,
+    printf("%s |block type %d |child id %d|group id %" PRIu64 "\n", flag, (int32_t)pDataBlock->info.type,
            pDataBlock->info.childId, pDataBlock->info.groupId);
     for (int32_t j = 0; j < rows; j++) {
       printf("%s |", flag);
diff --git a/source/dnode/vnode/src/sma/smaRollup.c b/source/dnode/vnode/src/sma/smaRollup.c
index 4b29b13abd..3505711cd0 100644
--- a/source/dnode/vnode/src/sma/smaRollup.c
+++ b/source/dnode/vnode/src/sma/smaRollup.c
@@ -599,14 +599,14 @@ static int32_t tdRSmaFetchAndSubmitResult(SRSmaInfoItem *pItem, STSchema *pTSche
       SSubmitReq *pReq = NULL;
       // TODO: the schema update should be handled
       if (buildSubmitReqFromDataBlock(&pReq, pResult, pTSchema, SMA_VID(pSma), suid) < 0) {
-        smaError("vgId:%d, build submit req for rsma table %" PRIi64 "l evel %" PRIi8 " failed since %s", SMA_VID(pSma),
+        smaError("vgId:%d, build submit req for rsma stable %" PRIi64 " level %" PRIi8 " failed since %s", SMA_VID(pSma),
                  suid, pItem->level, terrstr());
         goto _err;
       }
 
       if (pReq && tdProcessSubmitReq(sinkTsdb, output->info.version, pReq) < 0) {
         taosMemoryFreeClear(pReq);
-        smaError("vgId:%d, process submit req for rsma table %" PRIi64 " level %" PRIi8 " failed since %s",
+        smaError("vgId:%d, process submit req for rsma stable %" PRIi64 " level %" PRIi8 " failed since %s",
                  SMA_VID(pSma), suid, pItem->level, terrstr());
         goto _err;
       }
diff --git a/source/dnode/vnode/src/sma/smaSnapshot.c b/source/dnode/vnode/src/sma/smaSnapshot.c
new file mode 100644
index 0000000000..21dfd8a32d
--- /dev/null
+++ b/source/dnode/vnode/src/sma/smaSnapshot.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "sma.h"
+
+static int32_t rsmaSnapReadQTaskInfo(SRsmaSnapReader* pReader, uint8_t** ppData);
+static int32_t rsmaSnapWriteQTaskInfo(SRsmaSnapWriter* pWriter, uint8_t* pData, uint32_t nData);
+
+// SRsmaSnapReader ========================================
+struct SRsmaSnapReader {
+  SSma*   pSma;
+  int64_t sver;
+  int64_t ever;
+
+  // for data file
+  int8_t           rsmaDataDone[TSDB_RETENTION_L2];
+  STsdbSnapReader* pDataReader[TSDB_RETENTION_L2];
+
+  // for qtaskinfo file
+  int8_t         qTaskDone;
+  SQTaskFReader* pQTaskFReader;
+};
+
+int32_t rsmaSnapReaderOpen(SSma* pSma, int64_t sver, int64_t ever, SRsmaSnapReader** ppReader) {
+  int32_t          code = 0;
+  SRsmaSnapReader* pReader = NULL;
+
+  // alloc
+  pReader = (SRsmaSnapReader*)taosMemoryCalloc(1, sizeof(*pReader));
+  if (pReader == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _err;
+  }
+  pReader->pSma = pSma;
+  pReader->sver = sver;
+  pReader->ever = ever;
+
+  for (int32_t i = 0; i < TSDB_RETENTION_L2; ++i) {
+    if (pSma->pRSmaTsdb[i]) {
+      code = tsdbSnapReaderOpen(pSma->pRSmaTsdb[i], sver, ever, &pReader->pDataReader[i]);
+      if (code < 0) {
+        goto _err;
+      }
+    }
+  }
+  *ppReader = pReader;
+  smaInfo("vgId:%d vnode snapshot rsma reader opened succeed", SMA_VID(pSma));
+  return TSDB_CODE_SUCCESS;
+_err:
+  smaError("vgId:%d vnode snapshot rsma reader opened failed since %s", SMA_VID(pSma), tstrerror(code)); 
+  return TSDB_CODE_FAILED;
+}
+
+static int32_t rsmaSnapReadQTaskInfo(SRsmaSnapReader* pReader, uint8_t** ppData) {
+  int32_t code = 0;
+  SSma*   pSma = pReader->pSma;
+
+_exit:
+  smaInfo("vgId:%d vnode snapshot rsma read qtaskinfo succeed", SMA_VID(pSma));
+  return code;
+
+_err:
+  smaError("vgId:%d vnode snapshot rsma read qtaskinfo failed since %s", SMA_VID(pSma), tstrerror(code));
+  return code;
+}
+
+int32_t rsmaSnapRead(SRsmaSnapReader* pReader, uint8_t** ppData) {
+  int32_t code = 0;
+
+  *ppData = NULL;
+
+  smaInfo("vgId:%d vnode snapshot rsma read entry", SMA_VID(pReader->pSma));
+  // read rsma1/rsma2 file
+  for (int32_t i = 0; i < TSDB_RETENTION_L2; ++i) {
+    STsdbSnapReader* pTsdbSnapReader = pReader->pDataReader[i];
+    if (!pTsdbSnapReader) {
+      continue;
+    }
+    if (!pReader->rsmaDataDone[i]) {
+      smaInfo("vgId:%d vnode snapshot rsma read level %d not done", SMA_VID(pReader->pSma), i);
+      code = tsdbSnapRead(pTsdbSnapReader, ppData);
+      if (code) {
+        goto _err;
+      } else {
+        if (*ppData) {
+          goto _exit;
+        } else {
+          pReader->rsmaDataDone[i] = 1;
+        }
+      }
+    } else {
+      smaInfo("vgId:%d vnode snapshot rsma read level %d is done", SMA_VID(pReader->pSma), i);
+    }
+  }
+
+  // read qtaskinfo file
+  if (!pReader->qTaskDone) {
+    code = rsmaSnapReadQTaskInfo(pReader, ppData);
+    if (code) {
+      goto _err;
+    } else {
+      if (*ppData) {
+        goto _exit;
+      } else {
+        pReader->qTaskDone = 1;
+      }
+    }
+  }
+
+_exit:
+  smaInfo("vgId:%d vnode snapshot rsma read succeed", SMA_VID(pReader->pSma));
+  return code;
+
+_err:
+  smaError("vgId:%d vnode snapshot rsma read failed since %s", SMA_VID(pReader->pSma), tstrerror(code));
+  return code;
+}
+
+int32_t rsmaSnapReaderClose(SRsmaSnapReader** ppReader) {
+  int32_t          code = 0;
+  SRsmaSnapReader* pReader = *ppReader;
+
+  for (int32_t i = 0; i < TSDB_RETENTION_L2; ++i) {
+    if (pReader->pDataReader[i]) {
+      tsdbSnapReaderClose(&pReader->pDataReader[i]);
+    }
+  }
+
+  if (pReader->pQTaskFReader) {
+    // TODO: close for qtaskinfo
+    smaInfo("vgId:%d vnode snapshot rsma reader closed for qTaskInfo", SMA_VID(pReader->pSma));
+  }
+
+
+  smaInfo("vgId:%d vnode snapshot rsma reader closed", SMA_VID(pReader->pSma));
+
+  taosMemoryFreeClear(*ppReader);
+  return code;
+}
+
+// SRsmaSnapWriter ========================================
+struct SRsmaSnapWriter {
+  SSma*   pSma;
+  int64_t sver;
+  int64_t ever;
+
+  // config
+  int64_t commitID;
+
+  // for data file
+  STsdbSnapWriter* pDataWriter[TSDB_RETENTION_L2];
+
+  // for qtaskinfo file
+  SQTaskFReader* pQTaskFReader;
+  SQTaskFWriter* pQTaskFWriter;
+};
+
+int32_t rsmaSnapWriterOpen(SSma* pSma, int64_t sver, int64_t ever, SRsmaSnapWriter** ppWriter) {
+  int32_t          code = 0;
+  SRsmaSnapWriter* pWriter = NULL;
+
+  // alloc
+  pWriter = (SRsmaSnapWriter*)taosMemoryCalloc(1, sizeof(*pWriter));
+  if (pWriter == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _err;
+  }
+  pWriter->pSma = pSma;
+  pWriter->sver = sver;
+  pWriter->ever = ever;
+
+  for (int32_t i = 0; i < TSDB_RETENTION_L2; ++i) {
+    if (pSma->pRSmaTsdb[i]) {
+      code = tsdbSnapWriterOpen(pSma->pRSmaTsdb[i], sver, ever, &pWriter->pDataWriter[i]);
+      if (code < 0) {
+        goto _err;
+      }
+    }
+  }
+
+  // qtaskinfo
+  // TODO
+
+  *ppWriter = pWriter;
+
+  smaInfo("vgId:%d rsma snapshot writer open succeed", TD_VID(pSma->pVnode));
+  return code;
+
+_err:
+  smaError("vgId:%d rsma snapshot writer open failed since %s", TD_VID(pSma->pVnode), tstrerror(code));
+  *ppWriter = NULL;
+  return code;
+}
+
+int32_t rsmaSnapWriterClose(SRsmaSnapWriter** ppWriter, int8_t rollback) {
+  int32_t          code = 0;
+  SRsmaSnapWriter* pWriter = *ppWriter;
+
+  if (rollback) {
+    ASSERT(0);
+    // code = tsdbFSRollback(pWriter->pTsdb->pFS);
+    // if (code) goto _err;
+  } else {
+    for (int32_t i = 0; i < TSDB_RETENTION_L2; ++i) {
+      if (pWriter->pDataWriter[i]) {
+        code = tsdbSnapWriterClose(&pWriter->pDataWriter[i], rollback);
+        if (code) goto _err;
+      }
+    }
+  }
+
+  taosMemoryFree(pWriter);
+  *ppWriter = NULL;
+
+  smaInfo("vgId:%d vnode snapshot rsma writer close succeed", SMA_VID(pWriter->pSma));
+  return code;
+
+_err:
+  smaError("vgId:%d vnode snapshot rsma writer close failed since %s", SMA_VID(pWriter->pSma), tstrerror(code));
+  return code;
+}
+
+int32_t rsmaSnapWrite(SRsmaSnapWriter* pWriter, uint8_t* pData, uint32_t nData) {
+  int32_t       code = 0;
+  SSnapDataHdr* pHdr = (SSnapDataHdr*)pData;
+
+  // rsma1/rsma2
+  if (pHdr->type == SNAP_DATA_RSMA1) {
+    pHdr->type = SNAP_DATA_TSDB;
+    code = tsdbSnapWrite(pWriter->pDataWriter[0], pData, nData);
+  } else if (pHdr->type == SNAP_DATA_RSMA2) {
+    pHdr->type = SNAP_DATA_TSDB;
+    code = tsdbSnapWrite(pWriter->pDataWriter[1], pData, nData);
+  } else if (pHdr->type == SNAP_DATA_QTASK) {
+    code = rsmaSnapWriteQTaskInfo(pWriter, pData, nData);
+  }
+  if (code < 0) goto _err;
+
+_exit:
+  smaInfo("vgId:%d rsma snapshot write for data %" PRIi8 " succeed", SMA_VID(pWriter->pSma), pHdr->type);
+  return code;
+
+_err:
+  smaError("vgId:%d rsma snapshot write for data %" PRIi8 " failed since %s", SMA_VID(pWriter->pSma), pHdr->type,
+           tstrerror(code));
+  return code;
+}
+
+static int32_t rsmaSnapWriteQTaskInfo(SRsmaSnapWriter* pWriter, uint8_t* pData, uint32_t nData) {
+  int32_t code = 0;
+
+  if (pWriter->pQTaskFWriter == NULL) {
+    // SDelFile* pDelFile = pWriter->fs.pDelFile;
+
+    // // reader
+    // if (pDelFile) {
+    //   code = tsdbDelFReaderOpen(&pWriter->pDelFReader, pDelFile, pTsdb, NULL);
+    //   if (code) goto _err;
+
+    //   code = tsdbReadDelIdx(pWriter->pDelFReader, pWriter->aDelIdxR, NULL);
+    //   if (code) goto _err;
+    // }
+
+    // // writer
+    // SDelFile delFile = {.commitID = pWriter->commitID, .offset = 0, .size = 0};
+    // code = tsdbDelFWriterOpen(&pWriter->pDelFWriter, &delFile, pTsdb);
+    // if (code) goto _err;
+  }
+  smaInfo("vgId:%d vnode snapshot rsma write qtaskinfo succeed", SMA_VID(pWriter->pSma));
+_exit:
+  return code;
+
+_err:
+  smaError("vgId:%d vnode snapshot rsma write qtaskinfo failed since %s", SMA_VID(pWriter->pSma), tstrerror(code));
+  return code;
+}
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index d5486d62b1..a80c2c2fea 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -318,6 +318,7 @@ typedef struct STableScanInfo {
   int32_t         currentTable;
   int8_t          scanMode;
   int8_t          noTable;
+  int8_t          assignBlockUid;
 } STableScanInfo;
 
 typedef struct STableMergeScanInfo {
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index 1618bffb09..7f88e628c1 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -264,6 +264,12 @@ int32_t qUpdateQualifiedTableId(qTaskInfo_t tinfo, const SArray* tableIdList, bo
       }
 
       taosArrayPush(pTaskInfo->tableqinfoList.pTableList, &keyInfo);
+      if (pTaskInfo->tableqinfoList.map == NULL) {
+        pTaskInfo->tableqinfoList.map =
+            taosHashInit(32, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_NO_LOCK);
+      }
+
+      taosHashPut(pTaskInfo->tableqinfoList.map, uid, sizeof(uid), &keyInfo.groupId, sizeof(keyInfo.groupId));
     }
 
     if (keyBuf != NULL) {
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index f07256e88e..4a2f57d628 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -408,6 +408,10 @@ static SSDataBlock* doTableScanImpl(SOperatorInfo* pOperator) {
       pBlock->info.groupId = *groupId;
     }
 
+    if (pTableScanInfo->assignBlockUid) {
+      pBlock->info.groupId = pBlock->info.uid;
+    }
+
     pOperator->resultInfo.totalRows = pTableScanInfo->readRecorder.totalRows;
     pTableScanInfo->readRecorder.elapsedTime += (taosGetTimestampUs() - st) / 1000.0;
 
@@ -616,6 +620,7 @@ SOperatorInfo* createTableScanOperatorInfo(STableScanPhysiNode* pTableScanNode,
   pInfo->scanFlag = MAIN_SCAN;
   pInfo->pColMatchInfo = pColList;
   pInfo->currentGroupId = -1;
+  pInfo->assignBlockUid = pTableScanNode->assignBlockUid;
 
   pOperator->name = "TableScanOperator";  // for debug purpose
   pOperator->operatorType = QUERY_NODE_PHYSICAL_PLAN_TABLE_SCAN;
diff --git a/source/libs/nodes/src/nodesCodeFuncs.c b/source/libs/nodes/src/nodesCodeFuncs.c
index 1c9c097cba..af3f0c242b 100644
--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -1522,6 +1522,7 @@ static const char* jkTableScanPhysiPlanWatermark = "Watermark";
 static const char* jkTableScanPhysiPlanIgnoreExpired = "IgnoreExpired";
 static const char* jkTableScanPhysiPlanGroupTags = "GroupTags";
 static const char* jkTableScanPhysiPlanGroupSort = "GroupSort";
+static const char* jkTableScanPhysiPlanAssignBlockUid = "AssignBlockUid";
 
 static int32_t physiTableScanNodeToJson(const void* pObj, SJson* pJson) {
   const STableScanPhysiNode* pNode = (const STableScanPhysiNode*)pObj;
@@ -1578,6 +1579,9 @@ static int32_t physiTableScanNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkTableScanPhysiPlanGroupSort, pNode->groupSort);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkTableScanPhysiPlanAssignBlockUid, pNode->assignBlockUid);
+  }
 
   return code;
 }
@@ -1637,6 +1641,9 @@ static int32_t jsonToPhysiTableScanNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkTableScanPhysiPlanGroupSort, &pNode->groupSort);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkTableScanPhysiPlanAssignBlockUid, &pNode->assignBlockUid);
+  }
 
   return code;
 }
@@ -4525,7 +4532,6 @@ static int32_t jsonToSpecificNode(const SJson* pJson, void* pObj) {
     case QUERY_NODE_PHYSICAL_PLAN_BLOCK_DIST_SCAN:
       return jsonToPhysiScanNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_LAST_ROW_SCAN:
-
       return jsonToPhysiLastRowScanNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_TABLE_SCAN:
     case QUERY_NODE_PHYSICAL_PLAN_TABLE_MERGE_SCAN:
diff --git a/tests/script/tsim/sync/vnodesnapshot-test.sim b/tests/script/tsim/sync/vnodesnapshot-test.sim
index c3d8a243d3..9f4cd37b6d 100644
--- a/tests/script/tsim/sync/vnodesnapshot-test.sim
+++ b/tests/script/tsim/sync/vnodesnapshot-test.sim
@@ -132,7 +132,7 @@ print ===> write 100 records
 $N = 100
 $count = 0
 while $count < $N
-	$ms = 1591200000000 + $count
+	$ms = 1658924000000 + $count
     sql insert into ct1 values( $ms , $count , 2.1, 3.1)
     $count = $count + 1
 endw
@@ -149,7 +149,7 @@ system sh/exec.sh -n dnode1 -s stop -x SIGINT
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
 system sh/exec.sh -n dnode3 -s stop -x SIGINT
 
-
+sleep 3000
 
 ########################################################
 print ===> start dnode1 dnode2 dnode3 dnode4