diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 57dd4b9630..fbf6e0f272 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);
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 4ab0149b60..902413927c 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -134,6 +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;
 
@@ -149,6 +150,8 @@ int32_t tsdbDropRepo(TsdbRepoT *repo) {
   free(pRepo->rootDir);
   free(pRepo);
 
+  tsdbTrace("vgId %d: tsdb repository is dropped!", id);
+
   return 0;
 }
 
@@ -239,6 +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;
 }
 
@@ -257,6 +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);
@@ -290,6 +295,8 @@ int32_t tsdbCloseRepo(TsdbRepoT *repo) {
   tfree(pRepo->rootDir);
   tfree(pRepo);
 
+  tsdbTrace("vgId %d: repository is closed!", id);
+
   return 0;
 }
 
@@ -350,6 +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;
 }
@@ -377,11 +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;
@@ -396,13 +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;
@@ -843,6 +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;
 }
 
@@ -1105,11 +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) {
@@ -1121,10 +1123,13 @@ 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) {
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index c7e260ae50..4c5de4a862 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;
 
 }