diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 0cac1faa25..230e4ddaad 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -65,10 +65,11 @@ typedef struct SBlockInfo    SBlockInfo;
 typedef struct SSmaInfo      SSmaInfo;
 typedef struct SBlockCol     SBlockCol;
 
-#define TSDB_FILE_DLMT     ((uint32_t)0xF00AFA0F)
-#define TSDB_MAX_SUBBLOCKS 8
-#define TSDB_MAX_LAST_FILE 16
-#define TSDB_FHDR_SIZE     512
+#define TSDB_FILE_DLMT         ((uint32_t)0xF00AFA0F)
+#define TSDB_MAX_SUBBLOCKS     8
+#define TSDB_MAX_LAST_FILE     16
+#define TSDB_DEFAULT_LAST_FILE 8
+#define TSDB_FHDR_SIZE         512
 
 #define HAS_NONE  ((int8_t)0x1)
 #define HAS_NULL  ((int8_t)0x2)
diff --git a/source/dnode/vnode/src/tsdb/tsdbFS.c b/source/dnode/vnode/src/tsdb/tsdbFS.c
index d86cb7ab9b..4fc2398206 100644
--- a/source/dnode/vnode/src/tsdb/tsdbFS.c
+++ b/source/dnode/vnode/src/tsdb/tsdbFS.c
@@ -562,14 +562,6 @@ int32_t tsdbFSCopy(STsdb *pTsdb, STsdbFS *pFS) {
     }
     *fSet.pDataF = *pSet->pDataF;
 
-    // last
-    fSet.aLastF[0] = (SLastFile *)taosMemoryMalloc(sizeof(SLastFile));
-    if (fSet.aLastF[0] == NULL) {
-      code = TSDB_CODE_OUT_OF_MEMORY;
-      goto _exit;
-    }
-    *fSet.aLastF[0] = *pSet->aLastF[0];
-
     // sma
     fSet.pSmaF = (SSmaFile *)taosMemoryMalloc(sizeof(SSmaFile));
     if (fSet.pSmaF == NULL) {
@@ -582,6 +574,16 @@ int32_t tsdbFSCopy(STsdb *pTsdb, STsdbFS *pFS) {
       code = TSDB_CODE_OUT_OF_MEMORY;
       goto _exit;
     }
+
+    // last
+    for (int32_t iLast = 0; iLast < pSet->nLastF; iLast++) {
+      fSet.aLastF[iLast] = (SLastFile *)taosMemoryMalloc(sizeof(SLastFile));
+      if (fSet.aLastF[iLast] == NULL) {
+        code = TSDB_CODE_OUT_OF_MEMORY;
+        goto _exit;
+      }
+      *fSet.aLastF[iLast] = *pSet->aLastF[iLast];
+    }
   }
 
 _exit: