diff --git a/src/vnode/cache/inc/cache.h b/src/vnode/cache/inc/cache.h
new file mode 100644
index 0000000000..45b0e0c800
--- /dev/null
+++ b/src/vnode/cache/inc/cache.h
@@ -0,0 +1,14 @@
+#if !defined(_TD_CACHE_H_)
+#define _TD_CACHE_H_
+
+typedef void cache_pool_t;
+
+typedef struct SCacheBlock
+{
+
+    SCacheBlock *next;
+} SCacheBlock;
+
+
+
+#endif // _TD_CACHE_H_
diff --git a/src/vnode/tsdb/inc/tsdb.h b/src/vnode/tsdb/inc/tsdb.h
index b523441450..2117c951ca 100644
--- a/src/vnode/tsdb/inc/tsdb.h
+++ b/src/vnode/tsdb/inc/tsdb.h
@@ -1,3 +1,6 @@
+/**************************************
+ * FOR OUTSIDE USAGE
+ **************************************/
 #if !defined(_TD_TSDB_H_)
 #define _TD_TSDB_H_
 
diff --git a/src/vnode/tsdb/inc/tsdbMeta.h b/src/vnode/tsdb/inc/tsdbMeta.h
new file mode 100644
index 0000000000..27072a3003
--- /dev/null
+++ b/src/vnode/tsdb/inc/tsdbMeta.h
@@ -0,0 +1,16 @@
+/************************************
+ * For internal usage
+ ************************************/
+
+#include "tsdb.h"
+
+typedef struct STable
+{
+  STableId tid;
+  char *tableName;
+} STable;
+
+#define TSDB_GET_TABLE_ID(pTable) (((STable *)pTable)->tid).tableId
+#define TSDB_GET_TABLE_UID(pTable) (((STable *)pTable)->tid).uid
+
+#define TSDB_IS_SUPER_TABLE(pTable)
diff --git a/src/vnode/tsdb/src/tsdb.c b/src/vnode/tsdb/src/tsdb.c
index e69de29bb2..911ee3bd94 100644
--- a/src/vnode/tsdb/src/tsdb.c
+++ b/src/vnode/tsdb/src/tsdb.c
@@ -0,0 +1,42 @@
+#include <stdint.h>
+#include <pthread.h>
+
+#include "tsdb.h"
+#include "disk.h"
+#include "cache.h"
+
+typedef struct STSDBRepo
+{
+    // TSDB configuration
+    STSDBcfg *pCfg;
+
+    /* Disk tier handle for multi-tier storage
+     * 
+     * The handle is responsible for dealing with object-oriented
+     * storage.
+     */
+    SDiskTier *pDiskTier;
+
+    /* Cache block list
+     */
+    SCacheBlock *pCacheBloclList;
+
+    /* Map from tableId-->STable
+     */
+    STable *pTableList;
+
+    /* Map from tableName->tableId
+     * TODO: may use dict
+     */
+    void *pTableDict;
+
+    /* Map from super tableName->table
+     */
+    void *pSTableDict;
+
+    pthread_mutext_t tsdbMutex;
+
+} STSDBRepo;
+
+#define TSDB_GET_TABLE_BY_ID(pRepo, sid) (((STSDBRepo *)pRepo)->pTableList)[sid]
+#define TSDB_GET_TABLE_BY_NAME(pRepo, name)
diff --git a/src/vnode/tsdb/src/tsdbMeta.c b/src/vnode/tsdb/src/tsdbMeta.c
index e69de29bb2..2d13a2218d 100644
--- a/src/vnode/tsdb/src/tsdbMeta.c
+++ b/src/vnode/tsdb/src/tsdbMeta.c
@@ -0,0 +1,6 @@
+#include "tsdb.h"
+
+typedef struct STable
+{
+    /* data */
+};