diff --git a/source/dnode/vnode/src/tsdb/tsdbSnapshot.c b/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
index 0adc2e4d56..fe6e9da15f 100644
--- a/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
+++ b/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
@@ -1307,7 +1307,7 @@ _err:
   return code;
 }
 
-static int32_t tsdbSnapWriteRowData(STsdbSnapWriter* pWriter, int32_t iRow) {
+static int32_t tsdbSnapWriteWriteToDataFile(STsdbSnapWriter* pWriter, int32_t iRow, int8_t* done) {
   int32_t code = 0;
 
   SBlockData* pBlockData = &pWriter->bData;
@@ -1315,19 +1315,6 @@ static int32_t tsdbSnapWriteRowData(STsdbSnapWriter* pWriter, int32_t iRow) {
   TSDBROW     row = tsdbRowFromBlockData(pBlockData, iRow);
   TSDBKEY     key = TSDBROW_KEY(&row);
 
-  // End last table data write if need
-  if (id.suid != pWriter->id.suid || id.uid != pWriter->id.uid) {
-    code = tsdbSnapWriteTableDataEnd(pWriter);
-    if (code) goto _err;
-  }
-
-  // Start new table data write if need
-  if (pWriter->id.suid == 0 && pWriter->id.uid == 0) {
-    code = tsdbSnapWriteTableDataStart(pWriter, &id);
-    if (code) goto _err;
-  }
-
-  // Merge with .data file data
   if (pWriter->dReader.pBlockIdx && tTABLEIDCmprFn(pWriter->dReader.pBlockIdx, &id) == 0) {
   _merge_block:
     // merge with data block in row
@@ -1347,10 +1334,15 @@ static int32_t tsdbSnapWriteRowData(STsdbSnapWriter* pWriter, int32_t iRow) {
       }
 
       if (pWriter->dWriter.bData.nRow >= pWriter->maxRow) {
-        // TODO: commit to the block
+        code = tsdbWriteDataBlock(pWriter->dWriter.pWriter, &pWriter->dWriter.bData, &pWriter->dWriter.mDataBlk,
+                                  pWriter->cmprAlg);
+        if (code) goto _err;
       }
 
-      if (c < 0) goto _exit;
+      if (c < 0) {
+        *done = 1;
+        goto _exit;
+      }
     }
 
     // merge with dataBlk in whole
@@ -1374,6 +1366,9 @@ static int32_t tsdbSnapWriteRowData(STsdbSnapWriter* pWriter, int32_t iRow) {
                                     pWriter->cmprAlg);
           if (code) goto _err;
         }
+
+        *done = 1;
+        goto _exit;
       } else {
         code = tsdbReadDataBlockEx(pWriter->dReader.pReader, &dataBlk, &pWriter->dReader.bData);
         if (code) goto _err;
@@ -1386,7 +1381,20 @@ static int32_t tsdbSnapWriteRowData(STsdbSnapWriter* pWriter, int32_t iRow) {
     if (code) goto _err;
   }
 
-  // Append to the .stt data block (todo: check if need to set/reload sst block)
+_exit:
+  return code;
+
+_err:
+  return code;
+}
+
+static int32_t tsdbSnapWriteWriteToSttFile(STsdbSnapWriter* pWriter, int32_t iRow) {
+  int32_t code = 0;
+
+  SBlockData* pBlockData = &pWriter->bData;
+  TABLEID     id = {.suid = pBlockData->suid, .uid = pBlockData->uid ? pBlockData->uid : pBlockData->aUid[iRow]};
+  TSDBROW     row = tsdbRowFromBlockData(pBlockData, iRow);
+
   code = tBlockDataAppendRow(&pWriter->dWriter.sData, &row, NULL, id.uid);
   if (code) goto _err;
 
@@ -1403,6 +1411,41 @@ _err:
   return code;
 }
 
+static int32_t tsdbSnapWriteRowData(STsdbSnapWriter* pWriter, int32_t iRow) {
+  int32_t code = 0;
+
+  SBlockData* pBlockData = &pWriter->bData;
+  TABLEID     id = {.suid = pBlockData->suid, .uid = pBlockData->uid ? pBlockData->uid : pBlockData->aUid[iRow]};
+
+  // End last table data write if need
+  if (id.suid != pWriter->id.suid || id.uid != pWriter->id.uid) {
+    code = tsdbSnapWriteTableDataEnd(pWriter);
+    if (code) goto _err;
+  }
+
+  // Start new table data write if need
+  if (pWriter->id.suid == 0 && pWriter->id.uid == 0) {
+    code = tsdbSnapWriteTableDataStart(pWriter, &id);
+    if (code) goto _err;
+  }
+
+  // Merge with .data file data
+  int8_t done = 0;
+  code = tsdbSnapWriteWriteToDataFile(pWriter, iRow, &done);
+  if (code) goto _err;
+
+  // Append to the .stt data block (todo: check if need to set/reload sst block)
+  if (!done) {
+    code = tsdbSnapWriteWriteToSttFile(pWriter, iRow);
+    if (code) goto _err;
+  }
+_exit:
+  return code;
+
+_err:
+  return code;
+}
+
 static int32_t tsdbSnapWriteData(STsdbSnapWriter* pWriter, uint8_t* pData, uint32_t nData) {
   int32_t     code = 0;
   STsdb*      pTsdb = pWriter->pTsdb;