diff --git a/src/vnode/tsdb/inc/tsdb.h b/src/vnode/tsdb/inc/tsdb.h
index 198618978ecb1d8ecfa80170d5354c5a0cdc7e26..8478becaf226cc66559bcaff3dab91104e365876 100644
--- a/src/vnode/tsdb/inc/tsdb.h
+++ b/src/vnode/tsdb/inc/tsdb.h
@@ -35,25 +35,6 @@ typedef struct {
   char     data[];
 } SSubmitBlock;
 
-// Retention policy.
-typedef struct {
-  // TODO: Need a more fancy description
-  int32_t keep1;
-  int32_t keep2;
-  int32_t keep3;
-} SRetentionPolicy;
-
-// Data sharding policy.
-typedef struct {
-  // TODO: Need a more fancy description
-  int32_t daysPerFile;
-} SDataShardPolicy;
-
-// Rows in file block policy
-typedef struct {
-  // TODO: Need a more fancy description
-} SBlockRowsPolicy;
-
 // the TSDB repository configuration
 typedef struct {
   char *  rootDir;  // TSDB repository root directory, TODO: need to adjust here
@@ -62,7 +43,8 @@ typedef struct {
   int32_t daysPerFile;          // day per file sharding policy
   int32_t minRowsPerFileBlock;  // minimum rows per file block
   int32_t maxRowsPerFileBlock;  // maximum rows per file block
-  int32_t keep;                 // Day of data to keep
+  int32_t keep;                 // day of data to keep
+  int64_t maxCacheSize;         // maximum cache size this TSDB can use
   void *  cachePool;            // the cache pool the repository to use
 } STsdbCfg;
 
diff --git a/src/vnode/tsdb/src/tsdbMain.c b/src/vnode/tsdb/src/tsdbMain.c
index 0cc77c7b99f4c8192165ef66511033fe7651b522..826592bce684d11a50a662c88a996667c83435fc 100644
--- a/src/vnode/tsdb/src/tsdbMain.c
+++ b/src/vnode/tsdb/src/tsdbMain.c
@@ -46,24 +46,6 @@ typedef struct _tsdb_repo {
 #define TSDB_IS_REPO_ACTIVE(pRepo) ((pRepo)->state == TSDB_REPO_STATE_ACTIVE)
 #define TSDB_IS_REPO_CLOSED(pRepo) ((pRepo)->state == TSDB_REPO_STATE_CLOSED)
 
-// Check the correctness of the TSDB configuration
-static int32_t tsdbCheckCfg(STsdbCfg *pCfg) {
-  if (pCfg->rootDir == NULL) return -1;
-
-  if (access(pCfg->rootDir, F_OK|R_OK|W_OK) == -1) {
-    return -1;
-  }
-  // TODO
-  return 0;
-}
-
-static int32_t tsdbCreateFiles(STsdbRepo *pRepo) {
-  // TODO
-}
-
-static int32_t tsdbClearFiles(STsdbRepo *pRepo) {
-  // TODO
-}
 
 tsdb_repo_t *tsdbCreateRepo(STsdbCfg *pCfg) {
 
@@ -201,4 +183,23 @@ STableInfo *tsdbGetTableInfo(tsdb_repo_t *pRepo, STableId tid, int32_t *error) {
 
 int32_t tsdbInsertData(tsdb_repo_t *pRepo, STableId tid, char *pData, int32_t *error) {
   // TODO
+}
+
+// Check the correctness of the TSDB configuration
+static int32_t tsdbCheckCfg(STsdbCfg *pCfg) {
+  if (pCfg->rootDir == NULL) return -1;
+
+  if (access(pCfg->rootDir, F_OK|R_OK|W_OK) == -1) {
+    return -1;
+  }
+  // TODO
+  return 0;
+}
+
+static int32_t tsdbCreateFiles(STsdbRepo *pRepo) {
+  // TODO
+}
+
+static int32_t tsdbClearFiles(STsdbRepo *pRepo) {
+  // TODO
 }
\ No newline at end of file