diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index 77a0e23af9400efc601badc974998ec83232e4ad..4468ee4262c7fda28b42c89b1b184bcc6703a43f 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -109,6 +109,8 @@ int   tsdbDropTable(TsdbRepoT *pRepo, STableId tableId);
 int   tsdbAlterTable(TsdbRepoT *repo, STableCfg *pCfg);
 TSKEY tsdbGetTableLastKey(TsdbRepoT *repo, int64_t uid);
 
+uint32_t tsdbGetFileInfo(TsdbRepoT *repo, char *name, uint32_t *index, int32_t *size);
+
 // the TSDB repository info
 typedef struct STsdbRepoInfo {
   STsdbCfg tsdbCfg;
diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 2c3aff4b84bf5ad3d8efff1358e6192eae610575..fbf6e0f272ce7e5b3b01c56942f070c88015c302 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -151,8 +151,6 @@ STSchema * tsdbGetTableTagSchema(STsdbMeta *pMeta, STable *pTable);
 
 STsdbMeta *tsdbGetMeta(TsdbRepoT *pRepo);
 
-int32_t tsdbCreateTableImpl(STsdbMeta *pMeta, STableCfg *pCfg);
-int32_t tsdbDropTableImpl(STsdbMeta *pMeta, STableId tableId);
 STable *tsdbIsValidTableToInsert(STsdbMeta *pMeta, STableId tableId);
 // int32_t tsdbInsertRowToTableImpl(SSkipListNode *pNode, STable *pTable);
 STable *tsdbGetTableByUid(STsdbMeta *pMeta, int64_t uid);
@@ -496,9 +494,10 @@ int tsdbWriteCompInfo(SRWHelper *pHelper);
 int tsdbWriteCompIdx(SRWHelper *pHelper);
 
 // --------- Other functions need to further organize
-void tsdbFitRetention(STsdbRepo *pRepo);
-int  tsdbAlterCacheTotalBlocks(STsdbRepo *pRepo, int totalBlocks);
-void tsdbAdjustCacheBlocks(STsdbCache *pCache);
+void    tsdbFitRetention(STsdbRepo *pRepo);
+int     tsdbAlterCacheTotalBlocks(STsdbRepo *pRepo, int totalBlocks);
+void    tsdbAdjustCacheBlocks(STsdbCache *pCache);
+int32_t tsdbGetMetaFileName(char *rootDir, char *fname);
 
 #ifdef __cplusplus
 }
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 653ec50af8b4ef66e804ca3f617e1302119afe41..902413927c6e8659ab99227206d069185d4248cc 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -7,6 +7,7 @@
 #include "tscompression.h"
 #include "tchecksum.h"
 #include "ttime.h"
+#include <sys/stat.h>
 
 int tsdbDebugFlag = 135;
 
@@ -133,6 +134,7 @@ int32_t tsdbCreateRepo(char *rootDir, STsdbCfg *pCfg, void *limiter /* TODO */)
  */
 int32_t tsdbDropRepo(TsdbRepoT *repo) {
   STsdbRepo *pRepo = (STsdbRepo *)repo;
+  int id = pRepo->config.tsdbId;
 
   pRepo->state = TSDB_REPO_STATE_CLOSED;
 
@@ -148,6 +150,8 @@ int32_t tsdbDropRepo(TsdbRepoT *repo) {
   free(pRepo->rootDir);
   free(pRepo);
 
+  tsdbTrace("vgId %d: tsdb repository is dropped!", id);
+
   return 0;
 }
 
@@ -238,6 +242,7 @@ TsdbRepoT *tsdbOpenRepo(char *tsdbDir, STsdbAppH *pAppH) {
 
   pRepo->state = TSDB_REPO_STATE_ACTIVE;
 
+  tsdbTrace("vgId %d: open tsdb repository successfully!", pRepo->config.tsdbId);
   return (TsdbRepoT *)pRepo;
 }
 
@@ -256,6 +261,7 @@ TsdbRepoT *tsdbOpenRepo(char *tsdbDir, STsdbAppH *pAppH) {
 int32_t tsdbCloseRepo(TsdbRepoT *repo) {
   STsdbRepo *pRepo = (STsdbRepo *)repo;
   if (pRepo == NULL) return 0;
+  int id = pRepo->config.tsdbId;
 
   pRepo->state = TSDB_REPO_STATE_CLOSED;
   tsdbLockRepo(repo);
@@ -289,6 +295,8 @@ int32_t tsdbCloseRepo(TsdbRepoT *repo) {
   tfree(pRepo->rootDir);
   tfree(pRepo);
 
+  tsdbTrace("vgId %d: repository is closed!", id);
+
   return 0;
 }
 
@@ -349,6 +357,7 @@ int32_t tsdbTriggerCommit(TsdbRepoT *repo) {
   pthread_attr_init(&thattr);
   pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_DETACHED);
   pthread_create(&(pRepo->commitThread), &thattr, tsdbCommitData, (void *)repo);
+  tsdbTrace("vgId %d: start to commit!", pRepo->config.tsdbId);
 
   return 0;
 }
@@ -376,11 +385,6 @@ STsdbRepoInfo *tsdbGetStatus(TsdbRepoT *pRepo) {
   return NULL;
 }
 
-int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg) {
-  STsdbRepo *pRepo = (STsdbRepo *)repo;
-  return tsdbCreateTableImpl(pRepo->tsdbMeta, pCfg);
-}
-
 int tsdbAlterTable(TsdbRepoT *pRepo, STableCfg *pCfg) {
   // TODO
   return 0;
@@ -395,13 +399,6 @@ TSKEY tsdbGetTableLastKey(TsdbRepoT *repo, int64_t uid) {
   return TSDB_GET_TABLE_LAST_KEY(pTable);
 }
 
-int tsdbDropTable(TsdbRepoT *repo, STableId tableId) {
-  if (repo == NULL) return -1;
-  STsdbRepo *pRepo = (STsdbRepo *)repo;
-
-  return tsdbDropTableImpl(pRepo->tsdbMeta, tableId);
-}
-
 STableInfo *tsdbGetTableInfo(TsdbRepoT *pRepo, STableId tableId) {
   // TODO
   return NULL;
@@ -760,7 +757,7 @@ static int32_t tsdbSetRepoEnv(STsdbRepo *pRepo) {
     return -1;
   }
 
-  tsdbError(
+  tsdbTrace(
       "id %d: set up tsdb environment succeed! cacheBlockSize %d, totalBlocks %d, maxTables %d, daysPerFile %d, keep "
       "%d, minRowsPerFileBlock %d, maxRowsPerFileBlock %d, precision %d, compression%d",
       pRepo->config.tsdbId, pCfg->cacheBlockSize, pCfg->totalBlocks, pCfg->maxTables, pCfg->daysPerFile, pCfg->keep,
@@ -842,6 +839,9 @@ static int32_t tdInsertRowToTable(STsdbRepo *pRepo, SDataRow row, STable *pTable
   
   pTable->mem->numOfPoints = tSkipListGetSize(pTable->mem->pData);
 
+  tsdbTrace("vgId %d, tid %d, uid " PRId64 "a row is inserted to table! key" PRId64,
+            pRepo->config.tsdbId, pTable->tableId.tid, pTable->tableId.uid, dataRowKey(row));
+
   return 0;
 }
 
@@ -1104,11 +1104,14 @@ static int tsdbHasDataToCommit(SSkipListIterator **iters, int nIters, TSKEY minK
 }
 
 static void tsdbAlterCompression(STsdbRepo *pRepo, int8_t compression) {
+  int8_t oldCompRession = pRepo->config.compression;
   pRepo->config.compression = compression;
+  tsdbTrace("vgId %d: tsdb compression is changed from %d to %d", oldCompRession, compression);
 }
 
 static void tsdbAlterKeep(STsdbRepo *pRepo, int32_t keep) {
   STsdbCfg *pCfg = &pRepo->config;
+  int oldKeep = pCfg->keep;
 
   int maxFiles = keep / pCfg->maxTables + 3;
   if (pRepo->config.keep > keep) {
@@ -1120,8 +1123,57 @@ static void tsdbAlterKeep(STsdbRepo *pRepo, int32_t keep) {
     }
     pRepo->tsdbFileH->maxFGroups = maxFiles;
   }
+  tsdbTrace("id %d: keep is changed from %d to %d", pRepo->config.tsdbId, oldKeep, keep);
 }
 
 static void tsdbAlterMaxTables(STsdbRepo *pRepo, int32_t maxTables) {
   // TODO
+  int oldMaxTables = pRepo->config.maxTables;
+  tsdbTrace("vgId %d: tsdb maxTables is changed from %d to %d!", pRepo->config.tsdbId, oldMaxTables, maxTables);
+}
+
+uint32_t tsdbGetFileInfo(TsdbRepoT *repo, char *name, uint32_t *index, int32_t *size) {
+  // TODO: need to refactor this function
+
+  STsdbRepo *pRepo = (STsdbRepo *)repo;
+  // STsdbMeta *pMeta = pRepo->tsdbMeta;
+  STsdbFileH *pFileH = pRepo->tsdbFileH;
+  uint32_t   magic = 0;
+  char       fname[256] = "\0";
+
+  struct stat fState;
+  char *spath = strdup(pRepo->rootDir);
+  char *prefixDir = dirname(spath);
+
+  if (name[0] == 0) {
+    // Map index to the file name
+    int fid = (*index) / 3;
+
+    if (fid > pFileH->numOfFGroups) {
+      // return meta data file
+      if ((*index) % 3 > 0) { // it is finished
+        tfree(spath);
+        return 0;
+      } else {
+        tsdbGetMetaFileName(pRepo->rootDir, fname);
+      }
+    } else {
+      // return data file name
+      strcpy(fname, pFileH->fGroup[fid].files[(*index) % 3].fname);
+    }
+    strcpy(name, fname + strlen(spath));
+  } else {
+    // Name is provided, need to get the file info
+    sprintf(fname, "%s/%s", prefixDir, name);
+  }
+
+  if (stat(fname, &fState) < 0) {
+    tfree(spath);
+    return 0;
+  }
+
+  *size = fState.st_size;
+  magic = *size;
+
+  return magic;
 }
\ No newline at end of file
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index c7e260ae50f8c5b084b6553c6ac152b9848d083e..4c5de4a862f98cc71ac85a5e2dd1eef9c889298a 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -283,7 +283,10 @@ char* tsdbGetTableName(TsdbRepoT *repo, const STableId* id, int16_t* bytes) {
   }
 }
 
-int32_t tsdbCreateTableImpl(STsdbMeta *pMeta, STableCfg *pCfg) {
+int tsdbCreateTable(TsdbRepoT *repo, STableCfg *pCfg) {
+  STsdbRepo *pRepo = (STsdbRepo *)repo;
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
+
   if (tsdbCheckTableCfg(pCfg) < 0) return -1;
 
   STable *super = NULL;
@@ -351,8 +354,14 @@ int32_t tsdbCreateTableImpl(STsdbMeta *pMeta, STableCfg *pCfg) {
   }
 
   // Register to meta
-  if (newSuper) tsdbAddTableToMeta(pMeta, super, true);
+  if (newSuper) {
+    tsdbAddTableToMeta(pMeta, super, true);
+    tsdbTrace("vgId %d: super table is created! uid " PRId64, pRepo->config.tsdbId,
+              super->tableId.uid);
+  }
   tsdbAddTableToMeta(pMeta, table, true);
+  tsdbTrace("vgId %d: table is created! tid %d, uid " PRId64, pRepo->config.tsdbId,
+            super->tableId.tid, super->tableId.uid);
 
   // Write to meta file
   int bufLen = 0;
@@ -385,13 +394,24 @@ STable *tsdbIsValidTableToInsert(STsdbMeta *pMeta, STableId tableId) {
   return pTable;
 }
 
-int32_t tsdbDropTableImpl(STsdbMeta *pMeta, STableId tableId) {
+// int32_t tsdbDropTableImpl(STsdbMeta *pMeta, STableId tableId) {
+int tsdbDropTable(TsdbRepoT *repo, STableId tableId) {
+  STsdbRepo *pRepo = (STsdbRepo *)repo;
+  if (pRepo == NULL) return -1;
+
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
   if (pMeta == NULL) return -1;
 
   STable *pTable = tsdbGetTableByUid(pMeta, tableId.uid);
-  if (pTable == NULL) return -1;
+  if (pTable == NULL) {
+    tsdbError("vgId %d: failed to drop table since table not exists! tid %d, uid " PRId64, pRepo->config.tsdbId,
+              tableId.tid, tableId.uid);
+    return -1;
+  }
 
+  tsdbTrace("vgId %d: table is dropped! tid %s, uid " PRId64, pRepo->config.tsdbId, tableId.tid, tableId.uid);
   if (tsdbRemoveTableFromMeta(pMeta, pTable) < 0) return -1;
+
   return 0;
 
 }
diff --git a/src/tsdb/src/tsdbMetaFile.c b/src/tsdb/src/tsdbMetaFile.c
index 6821fc2d984c1c2b876fe70f740d04bc0cc04db7..f9d10ec57983d36731d4612460c9ac28e579f17b 100644
--- a/src/tsdb/src/tsdbMetaFile.c
+++ b/src/tsdb/src/tsdbMetaFile.c
@@ -28,7 +28,7 @@ typedef struct {
   int64_t uid;
 } SRecordInfo;
 
-static int32_t tsdbGetMetaFileName(char *rootDir, char *fname);
+// static int32_t tsdbGetMetaFileName(char *rootDir, char *fname);
 // static int32_t tsdbCheckMetaHeader(int fd);
 static int32_t tsdbWriteMetaHeader(int fd);
 static int     tsdbCreateMetaFile(char *fname);
@@ -180,7 +180,7 @@ void tsdbCloseMetaFile(SMetaFile *mfh) {
   tfree(mfh);
 }
 
-static int32_t tsdbGetMetaFileName(char *rootDir, char *fname) {
+int32_t tsdbGetMetaFileName(char *rootDir, char *fname) {
   if (rootDir == NULL) return -1;
   sprintf(fname, "%s/%s", rootDir, TSDB_META_FILE_NAME);
   return 0;
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 7552428a1467793740c3722f9fdc2fb95d6cbea6..c7e7c11506960457f158402abdfe7ef510e7dd7c 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -383,9 +383,8 @@ static int vnodeWalCallback(void *arg) {
 }
 
 static uint32_t vnodeGetFileInfo(void *ahandle, char *name, uint32_t *index, int32_t *size) {
-  // SVnodeObj *pVnode = ahandle;
-  //tsdbGetFileInfo(pVnode->tsdb, name, index, size);
-  return 0;
+  SVnodeObj *pVnode = ahandle;
+  return tsdbGetFileInfo(pVnode->tsdb, name, index, size);
 }
 
 static int vnodeGetWalInfo(void *ahandle, char *name, uint32_t *index) {