diff --git a/include/util/tcompression.h b/include/util/tcompression.h
index fd01bcf1a3..8d7c607e6b 100644
--- a/include/util/tcompression.h
+++ b/include/util/tcompression.h
@@ -131,7 +131,7 @@ typedef struct SCompressor SCompressor;
 int32_t tCompressorCreate(SCompressor **ppCmprsor);
 int32_t tCompressorDestroy(SCompressor *pCmprsor);
 int32_t tCompressorReset(SCompressor *pCmprsor, int8_t type, int8_t cmprAlg);
-int32_t tCompGen(SCompressor *pCmprsor, const uint8_t **ppData, int64_t *nData);
+int32_t tCompGen(SCompressor *pCmprsor, const uint8_t **ppData, int32_t *nData);
 int32_t tCompress(SCompressor *pCmprsor, const void *pData, int64_t nData);
 
 #ifdef __cplusplus
diff --git a/source/dnode/vnode/src/tsdb/tsdbDiskData.c b/source/dnode/vnode/src/tsdb/tsdbDiskData.c
index 3904012988..a5104dcfbd 100644
--- a/source/dnode/vnode/src/tsdb/tsdbDiskData.c
+++ b/source/dnode/vnode/src/tsdb/tsdbDiskData.c
@@ -349,6 +349,7 @@ struct SDiskData {
   SCompressor *pKeyC;
   int32_t      nDiskCol;
   SArray      *aDiskCol;
+  uint8_t     *aBuf[2];
 };
 
 int32_t tDiskDataInit(SDiskData *pDiskData, STSchema *pTSchema, TABLEID *pId, uint8_t cmprAlg) {
@@ -425,6 +426,9 @@ int32_t tDiskDataDestroy(SDiskData *pDiskData) {
     }
     taosArrayDestroy(pDiskData->aDiskCol);
   }
+  for (int32_t iBuf = 0; iBuf < sizeof(pDiskData->aBuf) / sizeof(pDiskData->aBuf[0]); iBuf++) {
+    tFree(pDiskData->aBuf[iBuf]);
+  }
 
   return code;
 }
@@ -435,8 +439,17 @@ int32_t tDiskDataAddRow(SDiskData *pDiskData, TSDBROW *pRow, STSchema *pTSchema,
   ASSERT(pId->suid == pDiskData->suid);
 
   // uid
-  code = tCompress(pDiskData->pUidC, &pId->uid, sizeof(int64_t));
-  if (code) goto _exit;
+  if (pDiskData->uid && pDiskData->uid != pId->uid) {
+    for (int32_t iRow = 0; iRow < pDiskData->nRow; iRow++) {
+      code = tCompress(pDiskData->pUidC, &pDiskData->uid, sizeof(int64_t));
+      if (code) goto _exit;
+    }
+    pDiskData->uid = 0;
+  }
+  if (pDiskData->uid == 0) {
+    code = tCompress(pDiskData->pUidC, &pId->uid, sizeof(int64_t));
+    if (code) goto _exit;
+  }
 
   // version
   int64_t version = TSDBROW_VERSION(pRow);
@@ -474,3 +487,87 @@ int32_t tDiskDataAddRow(SDiskData *pDiskData, TSDBROW *pRow, STSchema *pTSchema,
 _exit:
   return code;
 }
+
+int32_t tDiskDataToBinary(SDiskData *pDiskData, const uint8_t **ppData, int32_t *nData) {
+  int32_t code = 0;
+
+  ASSERT(pDiskData->nRow);
+
+  SDiskDataHdr hdr = {.delimiter = TSDB_FILE_DLMT,
+                      .fmtVer = 0,
+                      .suid = pDiskData->suid,
+                      .uid = pDiskData->uid,
+                      .szUid = 0,
+                      .szVer = 0,
+                      .szKey = 0,
+                      .szBlkCol = 0,
+                      .nRow = pDiskData->nRow,
+                      .cmprAlg = pDiskData->cmprAlg};
+
+  // UID
+  const uint8_t *pUid = NULL;
+  if (pDiskData->uid == 0) {
+    code = tCompGen(pDiskData->pUidC, &pUid, &hdr.szUid);
+    if (code) return code;
+  }
+
+  // VERSION
+  const uint8_t *pVer = NULL;
+  code = tCompGen(pDiskData->pVerC, &pVer, &hdr.szVer);
+  if (code) return code;
+
+  // TSKEY
+  const uint8_t *pKey = NULL;
+  code = tCompGen(pDiskData->pKeyC, &pKey, &hdr.szKey);
+  if (code) return code;
+
+  int32_t offset = 0;
+  for (int32_t iDiskCol = 0; iDiskCol < pDiskData->nDiskCol; iDiskCol++) {
+    SDiskCol *pDiskCol = (SDiskCol *)taosArrayGet(pDiskData->aDiskCol, iDiskCol);
+
+    if (pDiskCol->flag == HAS_NONE) continue;
+
+    // code = tDiskColToBinary(pDiskCol, );
+    // if (code) return code;
+
+    SBlockCol bCol = {.cid = pDiskCol->cid,
+                      .type = pDiskCol->type,
+                      // .smaOn = ,
+                      .flag = pDiskCol->flag,
+                      // .szOrigin =
+                      // .szBitmap =
+                      // .szOffset =
+                      // .szValue =
+                      .offset = offset};
+
+    hdr.szBlkCol += tPutBlockCol(NULL, &bCol);
+    offset = offset + bCol.szBitmap + bCol.szOffset + bCol.szValue;
+  }
+
+  *nData = tPutDiskDataHdr(NULL, &hdr) + hdr.szUid + hdr.szVer + hdr.szKey + hdr.szBlkCol + offset;
+  code = tRealloc(&pDiskData->aBuf[0], *nData);
+  if (code) return code;
+  *ppData = pDiskData->aBuf[0];
+
+  int32_t n = 0;
+  n += tPutDiskDataHdr(pDiskData->aBuf[0] + n, &hdr);
+  if (hdr.szUid) {
+    memcpy(pDiskData->aBuf[0] + n, pUid, hdr.szUid);
+    n += hdr.szUid;
+  }
+  memcpy(pDiskData->aBuf[0] + n, pVer, hdr.szVer);
+  n += hdr.szVer;
+  memcpy(pDiskData->aBuf[0] + n, pKey, hdr.szKey);
+  n += hdr.szKey;
+  for (int32_t iDiskCol = 0; iDiskCol < pDiskData->nDiskCol; iDiskCol++) {
+    SDiskCol *pDiskCol = (SDiskCol *)taosArrayGet(pDiskData->aDiskCol, iDiskCol);
+    n += tPutBlockCol(pDiskData->aBuf[0] + n, NULL /*pDiskCol->bCol (todo) */);
+  }
+  for (int32_t iDiskCol = 0; iDiskCol < pDiskData->nDiskCol; iDiskCol++) {
+    SDiskCol *pDiskCol = (SDiskCol *)taosArrayGet(pDiskData->aDiskCol, iDiskCol);
+    // memcpy(pDiskData->aBuf[0] + n, NULL, );
+    // n += 0;
+  }
+
+  return code;
+}
diff --git a/source/util/src/tcompression.c b/source/util/src/tcompression.c
index 5d6e6d12ac..cd9ff5e325 100644
--- a/source/util/src/tcompression.c
+++ b/source/util/src/tcompression.c
@@ -1574,7 +1574,7 @@ int32_t tCompressorReset(SCompressor *pCmprsor, int8_t type, int8_t cmprAlg) {
   return code;
 }
 
-int32_t tCompGen(SCompressor *pCmprsor, const uint8_t **ppData, int64_t *nData) {
+int32_t tCompGen(SCompressor *pCmprsor, const uint8_t **ppData, int32_t *nData) {
   int32_t code = 0;
 
   if (pCmprsor->nVal == 0) {