diff --git a/CMakeLists.txt b/CMakeLists.txt
index f27f5f1672..65d1e133d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@ if(${BUILD_WITH_LEVELDB})
 endif(${BUILD_WITH_LEVELDB})
 
 ## rocksdb
-option(BUILD_WITH_ROCKSDB "If build with rocksdb" ON)
+option(BUILD_WITH_ROCKSDB "If build with rocksdb" OFF)
 if(${BUILD_WITH_ROCKSDB})
     cat("${CMAKE_SUPPORT_DIR}/rocksdb_CMakeLists.txt.in" ${DEPS_TMP_FILE})
 endif(${BUILD_WITH_ROCKSDB})
diff --git a/include/common/schema.h b/include/common/schema.h
deleted file mode 100644
index ccc91f09ff..0000000000
--- a/include/common/schema.h
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _TD_COMMON_SCHEMA_H_
-#define _TD_COMMON_SCHEMA_H_
-
-#include "os.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// ----------------- TSDB COLUMN DEFINITION
-typedef struct {
-  int8_t   type;    // Column type
-  int16_t  colId;   // column ID
-  int16_t  bytes;   // column bytes (restore to int16_t in case of misuse)
-  uint16_t offset;  // point offset in SDataRow after the header part.
-} STColumn;
-
-#define colType(col) ((col)->type)
-#define colColId(col) ((col)->colId)
-#define colBytes(col) ((col)->bytes)
-#define colOffset(col) ((col)->offset)
-
-#define colSetType(col, t) (colType(col) = (t))
-#define colSetColId(col, id) (colColId(col) = (id))
-#define colSetBytes(col, b) (colBytes(col) = (b))
-#define colSetOffset(col, o) (colOffset(col) = (o))
-
-// ----------------- TSDB SCHEMA DEFINITION
-typedef struct {
-  int version;    // version
-  int numOfCols;  // Number of columns appended
-  int tlen;  // maximum length of a SDataRow without the header part (sizeof(VarDataOffsetT) + sizeof(VarDataLenT) + //
-             // (bytes))
-  uint16_t flen;  // First part length in a SDataRow after the header part
-  uint16_t vlen;  // pure value part length, excluded the overhead (bytes only)
-  STColumn columns[];
-} STSchema;
-
-#define schemaNCols(s) ((s)->numOfCols)
-#define schemaVersion(s) ((s)->version)
-#define schemaTLen(s) ((s)->tlen)
-#define schemaFLen(s) ((s)->flen)
-#define schemaVLen(s) ((s)->vlen)
-#define schemaColAt(s, i) ((s)->columns + i)
-#define tdFreeSchema(s) tfree((s))
-
-STSchema *tdDupSchema(STSchema *pSchema);
-int       tdEncodeSchema(void **buf, STSchema *pSchema);
-void *    tdDecodeSchema(void *buf, STSchema **pRSchema);
-
-static FORCE_INLINE int comparColId(const void *key1, const void *key2) {
-  if (*(int16_t *)key1 > ((STColumn *)key2)->colId) {
-    return 1;
-  } else if (*(int16_t *)key1 < ((STColumn *)key2)->colId) {
-    return -1;
-  } else {
-    return 0;
-  }
-}
-
-static FORCE_INLINE STColumn *tdGetColOfID(STSchema *pSchema, int16_t colId) {
-  void *ptr = bsearch(&colId, (void *)pSchema->columns, schemaNCols(pSchema), sizeof(STColumn), comparColId);
-  if (ptr == NULL) return NULL;
-  return (STColumn *)ptr;
-}
-
-// ----------------- SCHEMA BUILDER DEFINITION
-typedef struct {
-  int       tCols;
-  int       nCols;
-  int       tlen;
-  uint16_t  flen;
-  uint16_t  vlen;
-  int       version;
-  STColumn *columns;
-} STSchemaBuilder;
-
-int       tdInitTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version);
-void      tdDestroyTSchemaBuilder(STSchemaBuilder *pBuilder);
-void      tdResetTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version);
-int       tdAddColToSchema(STSchemaBuilder *pBuilder, int8_t type, int16_t colId, int16_t bytes);
-STSchema *tdGetSchemaFromBuilder(STSchemaBuilder *pBuilder);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /*_TD_COMMON_SCHEMA_H_*/
\ No newline at end of file
diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index c4321eb9df..2eef9db064 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -87,7 +87,7 @@ typedef struct {
 #define schemaColAt(s, i) ((s)->columns + i)
 #define tdFreeSchema(s) tfree((s))
 
-STSchema *tdDupSchema(STSchema *pSchema);
+STSchema *tdDupSchema(const STSchema *pSchema);
 int       tdEncodeSchema(void **buf, STSchema *pSchema);
 void *    tdDecodeSchema(void *buf, STSchema **pRSchema);
 
diff --git a/include/common/tschema.h b/include/common/tschema.h
new file mode 100644
index 0000000000..5e9057520b
--- /dev/null
+++ b/include/common/tschema.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TD_COMMON_SCHEMA_H_
+#define _TD_COMMON_SCHEMA_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_COMMON_SCHEMA_H_*/
\ No newline at end of file
diff --git a/include/libs/tkv/tkv.h b/include/libs/tkv/tkv.h
index c31d655e43..d9cabc1e40 100644
--- a/include/libs/tkv/tkv.h
+++ b/include/libs/tkv/tkv.h
@@ -16,30 +16,43 @@
 #ifndef _TD_TKV_H_
 #define _TD_TKV_H_
 
+#include "os.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 // Types exported
-typedef struct STkvDb      STkvDb;
-typedef struct STkvOptions STkvOptions;
-typedef struct STkvCache   STkvCache;
+typedef struct STkvDb        STkvDb;
+typedef struct STkvOpts      STkvOpts;
+typedef struct STkvCache     STkvCache;
+typedef struct STkvReadOpts  STkvReadOpts;
+typedef struct STkvWriteOpts STkvWriteOpts;
 
 // DB operations
-STkvDb *tkvOpen(const STkvOptions *options, const char *path);
+STkvDb *tkvOpen(const STkvOpts *options, const char *path);
 void    tkvClose(STkvDb *db);
-void    tkvPut(STkvDb *db, void * /*TODO*/);
+void    tkvPut(STkvDb *db, STkvWriteOpts *, char *key, size_t keylen, char *val, size_t vallen);
+char *  tkvGet(STkvDb *db, STkvReadOpts *, char *key, size_t keylen, size_t *vallen);
 
 // DB options
-STkvOptions *tkvOptionsCreate();
-void         tkvOptionsDestroy(STkvOptions *);
-void         tkvOptionsSetCache(STkvOptions *, STkvCache *);
+STkvOpts *tkvOptionsCreate();
+void      tkvOptionsDestroy(STkvOpts *);
+void      tkvOptionsSetCache(STkvOpts *, STkvCache *);
 
 // DB cache
 typedef enum { TKV_LRU_CACHE = 0, TKV_LFU_CACHE = 1 } ETkvCacheType;
 STkvCache *tkvCacheCreate(size_t capacity, ETkvCacheType type);
 void       tkvCacheDestroy(STkvCache *);
 
+// STkvReadOpts
+STkvReadOpts *tkvReadOptsCreate();
+void          tkvReadOptsDestroy(STkvReadOpts *);
+
+// STkvWriteOpts
+STkvWriteOpts *tkvWriteOptsCreate();
+void           tkvWriteOptsDestroy(STkvWriteOpts *);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/libs/wal/wal.h b/include/libs/wal/wal.h
index 37cd263783..b6fd5a70d9 100644
--- a/include/libs/wal/wal.h
+++ b/include/libs/wal/wal.h
@@ -58,18 +58,25 @@ void     walStop(twalh);
 void     walClose(twalh);
 
 //write
-int64_t  walWrite(twalh, int8_t msgType, void* body, uint32_t bodyLen);
-void     walFsync(twalh, bool forceHint);
-//int32_t  walCommit(twalh, int64_t ver);
-//int32_t  walRollback(twalh, int64_t ver);
+int64_t  walWriteWithMsgType(twalh, int8_t msgType, void* body, int32_t bodyLen);
+int64_t  walWrite(twalh, void* body, int32_t bodyLen);
+int64_t  walWriteBatch(twalh, void* body, int32_t* bodyLen, int32_t batchSize);
+
+//apis for lifecycle management
+void     walFsync(twalh, bool force);
+int32_t  walCommit(twalh, int64_t ver);
+//truncate after
+int32_t  walRollback(twalh, int64_t ver);
+//notify that previous log can be pruned safely
+int32_t  walPrune(twalh, int64_t ver);
 
 //read
 int32_t  walRead(twalh, SWalHead **, int64_t ver);
 int32_t  walReadWithFp(twalh, FWalWrite writeFp, int64_t verStart, int readNum);
 
-//life cycle
-int32_t  walDataPersisted(twalh, int64_t ver);
+//lifecycle check
 int32_t  walFirstVer(twalh);
+int32_t  walPersistedVer(twalh);
 int32_t  walLastVer(twalh);
 //int32_t  walDataCorrupted(twalh);
 
diff --git a/include/os/osDir.h b/include/os/osDir.h
index 32733753a8..3ee3be2c10 100644
--- a/include/os/osDir.h
+++ b/include/os/osDir.h
@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-void taosRemoveDir(char *dirname);
+void taosRemoveDir(const char *dirname);
 bool taosDirExist(char *dirname);
 bool taosMkDir(char *dirname);
 void taosRemoveOldFiles(char *dirname, int32_t keepDays);
diff --git a/include/server/vnode/meta/meta.h b/include/server/vnode/meta/meta.h
index 4167dedde6..3afe01511b 100644
--- a/include/server/vnode/meta/meta.h
+++ b/include/server/vnode/meta/meta.h
@@ -27,33 +27,44 @@ extern "C" {
 typedef uint64_t tuid_t;
 
 // Types exported
-typedef struct SMeta             SMeta;
-typedef struct SMetaOptions      SMetaOptions;
-typedef struct SMetaQueryHandle  SMetaQueryHandle;
-typedef struct SMetaQueryOptions SMetaQueryOptions;
+typedef struct SMeta            SMeta;
+typedef struct SMetaOpts        SMetaOpts;
+typedef struct SMetaQueryHandle SMetaQueryHandle;
+typedef struct SMetaQueryOpts   SMetaQueryOpts;
+typedef struct STableOpts       STableOpts;
 
 // SMeta operations
 int    metaCreate(const char *path);
-int    metaDestroy(const char *path);
-SMeta *metaOpen(SMetaOptions *);
+void   metaDestroy(const char *path);
+SMeta *metaOpen(SMetaOpts *);
 void   metaClose(SMeta *);
-int    metaCreateTable(SMeta *, void *);
+int    metaCreateTable(SMeta *, STableOpts *);
 int    metaDropTable(SMeta *, uint64_t tuid_t);
 int    metaAlterTable(SMeta *, void *);
 int    metaCommit(SMeta *);
 
 // Options
-SMetaOptions *metaOptionsCreate();
-void          metaOptionsDestroy(SMetaOptions *);
-void          metaOptionsSetCache(SMetaOptions *, size_t capacity);
+SMetaOpts *metaOptionsCreate();
+void       metaOptionsDestroy(SMetaOpts *);
+void       metaOptionsSetCache(SMetaOpts *, size_t capacity);
 
 // SMetaQueryHandle
-SMetaQueryHandle *metaQueryHandleCreate(SMetaQueryOptions *);
+SMetaQueryHandle *metaQueryHandleCreate(SMetaQueryOpts *);
 void              metaQueryHandleDestroy(SMetaQueryHandle *);
 
-// SMetaQueryOptions
-SMetaQueryOptions *metaQueryOptionsCreate();
-void               metaQueryOptionsDestroy(SMetaQueryOptions *);
+// SMetaQueryOpts
+SMetaQueryOpts *metaQueryOptionsCreate();
+void            metaQueryOptionsDestroy(SMetaQueryOpts *);
+
+// STableOpts
+void metaTableOptsInit(STableOpts *, int8_t type, const char *name, const STSchema *pSchema);
+
+/* -------------------------------- Hided implementations -------------------------------- */
+struct STableOpts {
+  int8_t    type;
+  char *    name;
+  STSchema *pSchema;
+};
 
 #ifdef __cplusplus
 }
diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index 6e76e3a8d0..94d93b651a 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -48,7 +48,7 @@ int tdAllocMemForCol(SDataCol *pCol, int maxPoints) {
 /**
  * Duplicate the schema and return a new object
  */
-STSchema *tdDupSchema(STSchema *pSchema) {
+STSchema *tdDupSchema(const STSchema *pSchema) {
 
   int tlen = sizeof(STSchema) + sizeof(STColumn) * schemaNCols(pSchema);
   STSchema *tSchema = (STSchema *)malloc(tlen);
diff --git a/source/common/src/ttime.c b/source/common/src/ttime.c
index b61d3cab1e..2686dcd205 100644
--- a/source/common/src/ttime.c
+++ b/source/common/src/ttime.c
@@ -94,8 +94,6 @@ static int32_t (*parseLocaltimeFp[]) (char* timestr, int64_t* time, int32_t time
   parseLocaltimeWithDst
 };
 
-int32_t taosGetTimestampSec() { return (int32_t)time(NULL); }
-
 int32_t taosParseTime(char* timestr, int64_t* time, int32_t len, int32_t timePrec, int8_t day_light) {
   /* parse datatime string in with tz */
   if (strnchr(timestr, 'T', len, false) != NULL) {
diff --git a/source/libs/tkv/CMakeLists.txt b/source/libs/tkv/CMakeLists.txt
index bec359d75d..6ad553b1ca 100644
--- a/source/libs/tkv/CMakeLists.txt
+++ b/source/libs/tkv/CMakeLists.txt
@@ -4,4 +4,8 @@ target_include_directories(
     tkv
     PUBLIC "${CMAKE_SOURCE_DIR}/include/libs/tkv"
     PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/inc"
+)
+target_link_libraries(
+    tkv
+    PUBLIC os
 )
\ No newline at end of file
diff --git a/source/libs/tkv/src/tkv.c b/source/libs/tkv/src/tkv.c
index 6dea4a4e57..9c78c23db4 100644
--- a/source/libs/tkv/src/tkv.c
+++ b/source/libs/tkv/src/tkv.c
@@ -11,4 +11,71 @@
  *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
\ No newline at end of file
+ */
+
+#include "tkv.h"
+
+struct STkvDb {
+  // TODO
+};
+struct STkvOpts {
+  // TODO
+};
+struct STkvCache {
+  // TODO
+};
+struct STkvReadOpts {
+  // TODO
+};
+struct STkvWriteOpts {
+  // TODO
+};
+
+STkvDb *tkvOpen(const STkvOpts *options, const char *path) {
+  // TODO
+  return NULL;
+}
+
+void tkvClose(STkvDb *db) {
+  // TODO
+}
+
+void tkvPut(STkvDb *db, STkvWriteOpts *pwopts, char *key, size_t keylen, char *val, size_t vallen) {
+  // TODO
+}
+
+char *tkvGet(STkvDb *db, STkvReadOpts *propts, char *key, size_t keylen, size_t *vallen) {
+  // TODO
+  return NULL;
+}
+
+STkvOpts *tkvOptionsCreate() {
+  // TODO
+  return NULL;
+}
+
+void tkvOptionsDestroy(STkvOpts *popts) {
+  // TODO
+}
+
+void tkvOptionsSetCache(STkvOpts *popts, STkvCache *pCache) {
+  // TODO
+}
+
+STkvReadOpts *tkvReadOptsCreate() {
+    // TODO
+    return NULL;
+}
+
+void tkvReadOptsDestroy(STkvReadOpts *propts) {
+  // TODO
+}
+
+STkvWriteOpts *tkvWriteOptsCreate() {
+    // TODO
+    return NULL;
+}
+
+void tkvWriteOptsDestroy(STkvWriteOpts *pwopts) {
+  // TODO
+}
\ No newline at end of file
diff --git a/source/os/src/osDir.c b/source/os/src/osDir.c
index 0526dffe9e..17ab88edf6 100644
--- a/source/os/src/osDir.c
+++ b/source/os/src/osDir.c
@@ -34,7 +34,7 @@
 #include <unistd.h>
 #include <wordexp.h>
 
-void taosRemoveDir(char *dirname) {
+void taosRemoveDir(const char *dirname) {
   DIR *dir = opendir(dirname);
   if (dir == NULL) return;
 
@@ -48,7 +48,7 @@ void taosRemoveDir(char *dirname) {
       taosRemoveDir(filename);
     } else {
       (void)remove(filename);
-      printf("file:%s is removed", filename);
+      printf("file:%s is removed\n", filename);
     }
   }
 
diff --git a/source/os/src/osTime.c b/source/os/src/osTime.c
index bf0585e86d..7c655c0251 100644
--- a/source/os/src/osTime.c
+++ b/source/os/src/osTime.c
@@ -63,4 +63,6 @@ FORCE_INLINE int32_t taosGetTimeOfDay(struct timeval *tv) {
   return gettimeofday(tv, NULL);
 }
 
+int32_t taosGetTimestampSec() { return (int32_t)time(NULL); }
+
 #endif
diff --git a/source/server/vnode/inc/vnodeMain.h b/source/server/vnode/inc/vnodeMain.h
index 093d07b013..0b41812215 100644
--- a/source/server/vnode/inc/vnodeMain.h
+++ b/source/server/vnode/inc/vnodeMain.h
@@ -16,10 +16,11 @@
 #ifndef _TD_VNODE_MAIN_H_
 #define _TD_VNODE_MAIN_H_
 
+#include "vnodeInt.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
-#include "vnodeInt.h"
 
 int32_t vnodeInitMain();
 void    vnodeCleanupMain();
diff --git a/source/server/vnode/inc/vnodeWrite.h b/source/server/vnode/inc/vnodeWrite.h
index 48acf750c1..0bb670de5b 100644
--- a/source/server/vnode/inc/vnodeWrite.h
+++ b/source/server/vnode/inc/vnodeWrite.h
@@ -37,4 +37,4 @@ void vnodeWaitWriteCompleted(SVnode *pVnode);
 }
 #endif
 
-#endif /*_TD_VNODE_WRITE_H_*/
\ No newline at end of file
+#endif /*_TD_VNODE_WRITE_H_*/
diff --git a/source/server/vnode/meta/CMakeLists.txt b/source/server/vnode/meta/CMakeLists.txt
index 94bf9581d3..0de78074ee 100644
--- a/source/server/vnode/meta/CMakeLists.txt
+++ b/source/server/vnode/meta/CMakeLists.txt
@@ -8,8 +8,8 @@ target_include_directories(
 target_link_libraries(
     meta
     PUBLIC common
+    PUBLIC tkv
 )
-target_link_libraries(meta PUBLIC rocksdb)
 
 if(${BUILD_TEST})
     add_subdirectory(test)
diff --git a/source/server/vnode/meta/inc/metaUid.h b/source/server/vnode/meta/inc/metaUid.h
new file mode 100644
index 0000000000..b01492cbf7
--- /dev/null
+++ b/source/server/vnode/meta/inc/metaUid.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TD_META_UID_H_
+#define _TD_META_UID_H_
+
+#include "os.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef uint64_t tb_uid_t;
+tb_uid_t         metaGenerateUid();
+
+#define IVLD_TB_UID 0
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_META_UID_H_*/
\ No newline at end of file
diff --git a/source/server/vnode/meta/src/meta.c b/source/server/vnode/meta/src/meta.c
index f35de5eb9e..c63aa31b30 100644
--- a/source/server/vnode/meta/src/meta.c
+++ b/source/server/vnode/meta/src/meta.c
@@ -13,19 +13,21 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <rocksdb/c.h>
-
+#include "tkv.h"
 #include "thash.h"
 #include "tlist.h"
 #include "tlockfree.h"
 #include "ttypes.h"
 
 #include "meta.h"
+#include "metaUid.h"
+
+/* -------------------- Structures -------------------- */
 
 typedef struct STable {
-  uint64_t uid;
-  tstr *   name;
-  uint64_t suid;
+  tb_uid_t uid;
+  char *   name;
+  tb_uid_t suid;
   SArray * schema;
 } STable;
 
@@ -41,15 +43,21 @@ typedef struct STableObj {
 struct SMeta {
   pthread_rwlock_t rwLock;
 
-  SHashObj * pTableObjHash;  // uid --> STableObj
-  SList *    stbList;        // super table list
-  rocksdb_t *tbnameDb;       // tbname --> uid
-  rocksdb_t *tagDb;          // uid --> tag
-  rocksdb_t *schemaDb;
-  size_t     totalUsed;
+  SHashObj *pTableObjHash;  // uid --> STableObj
+  SList *   stbList;        // super table list
+  STkvDb *  tbnameDb;       // tbname --> uid
+  STkvDb *  tagDb;          // uid --> tag
+  STkvDb *  schemaDb;
+  STkvDb *  tagIdx;
+  size_t    totalUsed;
 };
 
-SMeta *metaOpen(SMetaOptions *options) {
+static STable *   metaTableNew(tb_uid_t uid, const char *name, int32_t sver);
+static STableObj *metaTableObjNew();
+
+/* -------------------- Methods -------------------- */
+
+SMeta *metaOpen(SMetaOpts *options) {
   SMeta *pMeta = NULL;
   char * err = NULL;
 
@@ -64,21 +72,148 @@ SMeta *metaOpen(SMetaOptions *options) {
 
   pMeta->stbList = tdListNew(sizeof(STableObj *));
 
+  // Options
+  STkvOpts *dbOptions = tkvOptionsCreate();
+
+  taosMkDir("meta");
+
   // Open tbname DB
-  rocksdb_options_t *tbnameDbOptions = rocksdb_options_create();
-  pMeta->tbnameDb = rocksdb_open(tbnameDbOptions, "tbname_uid_db", &err);
+  pMeta->tbnameDb = tkvOpen(dbOptions, "meta/tbname_uid_db");
 
   // Open tag DB
-  pMeta->tagDb = rocksdb_open(tbnameDbOptions, "uid_tag_db", &err);
+  pMeta->tagDb = tkvOpen(dbOptions, "meta/uid_tag_db");
 
   // Open schema DB
-  pMeta->schemaDb = rocksdb_open(tbnameDbOptions, "schema_db", &err);
+  pMeta->schemaDb = tkvOpen(dbOptions, "meta/schema_db");
+
+  // Open tag index
+  pMeta->tagIdx = tkvOpen(dbOptions, "meta/tag_idx_db");
+
+  tkvOptionsDestroy(dbOptions);
 
   return pMeta;
 }
 
 void metaClose(SMeta *pMeta) {
-  // TODO
+  if (pMeta) {
+    tkvClose(pMeta->tagIdx);
+    tkvClose(pMeta->schemaDb);
+    tkvClose(pMeta->tagDb);
+    tkvClose(pMeta->tbnameDb);
+
+    tdListFree(pMeta->stbList);
+    taosHashCleanup(pMeta->pTableObjHash);
+    pthread_rwlock_destroy(&(pMeta->rwLock));
+  }
 }
 
-int metaCommit(SMeta *meta) { return 0; }
\ No newline at end of file
+int metaCreateTable(SMeta *pMeta, STableOpts *pTableOpts) {
+  size_t        vallen;
+  STkvReadOpts *ropt;
+  STableObj *   pTableObj = NULL;
+  STkvWriteOpts *wopt;
+
+  // Check if table already exists
+  ropt = tkvReadOptsCreate();
+
+  char *uidStr = tkvGet(pMeta->tbnameDb, ropt, pTableOpts->name, strlen(pTableOpts->name), &vallen);
+  if (uidStr != NULL) {
+    // Has duplicate named table
+    return -1;
+  }
+
+  tkvReadOptsDestroy(ropt);
+
+  // Create table obj
+  pTableObj = metaTableObjNew();
+  if (pTableObj == NULL) {
+    // TODO
+    return -1;
+  }
+
+  // Create table object
+  pTableObj->pTable = metaTableNew(metaGenerateUid(), pTableOpts->name, schemaVersion(pTableOpts->pSchema));
+  if (pTableObj->pTable == NULL) {
+    // TODO
+  }
+
+  pthread_rwlock_rdlock(&pMeta->rwLock);
+
+  taosHashPut(pMeta->pTableObjHash, &(pTableObj->pTable->uid), sizeof(tb_uid_t), &pTableObj, sizeof(pTableObj));
+
+  wopt = tkvWriteOptsCreate();
+  // rocksdb_writeoptions_disable_WAL(wopt, 1);
+
+  // Add to tbname db
+  tkvPut(pMeta->tbnameDb, wopt, pTableOpts->name, strlen(pTableOpts->name), (char *)&pTableObj->pTable->uid,
+              sizeof(tb_uid_t));
+
+  // Add to schema db
+  char  id[12];
+  char  buf[256];
+  void *pBuf = buf;
+  *(tb_uid_t *)id = pTableObj->pTable->uid;
+  *(int32_t *)(id + sizeof(tb_uid_t)) = schemaVersion(pTableOpts->pSchema);
+  int size = tdEncodeSchema(&pBuf, pTableOpts->pSchema);
+
+  tkvPut(pMeta->schemaDb, wopt, id, 12, buf, size);
+
+  tkvWriteOptsDestroy(wopt);
+
+  pthread_rwlock_unlock(&pMeta->rwLock);
+
+  return 0;
+}
+
+void metaDestroy(const char *path) { taosRemoveDir(path); }
+
+int metaCommit(SMeta *meta) { return 0; }
+
+void metaTableOptsInit(STableOpts *pTableOpts, int8_t type, const char *name, const STSchema *pSchema) {
+  pTableOpts->type = type;
+  pTableOpts->name = strdup(name);
+  pTableOpts->pSchema = tdDupSchema(pSchema);
+}
+
+/* -------------------- Static Methods -------------------- */
+
+static STable *metaTableNew(tb_uid_t uid, const char *name, int32_t sver) {
+  STable *pTable = NULL;
+
+  pTable = (STable *)malloc(sizeof(*pTable));
+  if (pTable == NULL) {
+    // TODO
+    return NULL;
+  }
+
+  pTable->schema = taosArrayInit(0, sizeof(int32_t));
+  if (pTable->schema == NULL) {
+    // TODO
+    return NULL;
+  }
+
+  pTable->uid = uid;
+  pTable->name = strdup(name);
+  pTable->suid = IVLD_TB_UID;
+  taosArrayPush(pTable->schema, &sver);
+
+  return pTable;
+}
+
+static STableObj *metaTableObjNew() {
+  STableObj *pTableObj = NULL;
+
+  pTableObj = (STableObj *)malloc(sizeof(*pTableObj));
+  if (pTableObj == NULL) {
+    return NULL;
+  }
+
+  pTableObj->pin = true;
+  pTableObj->ref = 1;
+  taosInitRWLatch(&(pTableObj->latch));
+  pTableObj->offset = UINT64_MAX;
+  pTableObj->ctbList = NULL;
+  pTableObj->pTable = NULL;
+
+  return pTableObj;
+}
\ No newline at end of file
diff --git a/source/server/vnode/meta/src/metaUid.c b/source/server/vnode/meta/src/metaUid.c
new file mode 100644
index 0000000000..4662969a2e
--- /dev/null
+++ b/source/server/vnode/meta/src/metaUid.c
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "metaUid.h"
+
+static tb_uid_t nuid = IVLD_TB_UID;
+
+tb_uid_t metaGenerateUid() {
+  // TODO: need a more complex UID generator
+  return ++nuid;
+}
\ No newline at end of file
diff --git a/source/server/vnode/meta/test/CMakeLists.txt b/source/server/vnode/meta/test/CMakeLists.txt
index ca82d3fb83..bca02c2907 100644
--- a/source/server/vnode/meta/test/CMakeLists.txt
+++ b/source/server/vnode/meta/test/CMakeLists.txt
@@ -2,6 +2,7 @@ add_executable(metaTest "")
 target_sources(metaTest
     PRIVATE
     "../src/meta.c"
+    "../src/metaUid.c"
     "metaTests.cpp"
 )
 target_include_directories(metaTest 
@@ -13,6 +14,11 @@ target_link_libraries(metaTest
     os
     util
     common
-    rocksdb
     gtest_main
+    tkv
+)
+enable_testing()
+add_test(
+    NAME meta_test
+    COMMAND metaTest
 )
\ No newline at end of file
diff --git a/source/server/vnode/meta/test/metaTests.cpp b/source/server/vnode/meta/test/metaTests.cpp
index ab204455f2..47ca49b70a 100644
--- a/source/server/vnode/meta/test/metaTests.cpp
+++ b/source/server/vnode/meta/test/metaTests.cpp
@@ -1,9 +1,37 @@
 #include <gtest/gtest.h>
+#include <string.h>
 #include <iostream>
 
 #include "meta.h"
 
 TEST(MetaTest, meta_open_test) {
-    metaOpen(NULL);
-    std::cout << "Hello META!" << std::endl;
+  // Open Meta
+  SMeta *meta = metaOpen(NULL);
+  std::cout << "Meta is opened!" << std::endl;
+
+  // Create tables
+  STableOpts      tbOpts;
+  char            tbname[128];
+  STSchema *      pSchema;
+  STSchemaBuilder sb;
+  tdInitTSchemaBuilder(&sb, 0);
+  for (size_t i = 0; i < 10; i++) {
+    tdAddColToSchema(&sb, TSDB_DATA_TYPE_TIMESTAMP, i, 8);
+  }
+  pSchema = tdGetSchemaFromBuilder(&sb);
+  tdDestroyTSchemaBuilder(&sb);
+  for (size_t i = 0; i < 1000000; i++) {
+    sprintf(tbname, "tb%ld", i);
+    metaTableOptsInit(&tbOpts, 0, tbname, pSchema);
+
+    metaCreateTable(meta, &tbOpts);
+  }
+
+  // Close Meta
+  metaClose(meta);
+  std::cout << "Meta is closed!" << std::endl;
+
+  // Destroy Meta
+  metaDestroy("meta");
+  std::cout << "Meta is destroyed!" << std::endl;
 }
\ No newline at end of file
diff --git a/source/server/vnode/tq/CMakeLists.txt b/source/server/vnode/tq/CMakeLists.txt
index 9577007400..0c15e23d33 100644
--- a/source/server/vnode/tq/CMakeLists.txt
+++ b/source/server/vnode/tq/CMakeLists.txt
@@ -3,10 +3,11 @@ add_library(tq ${TQ_SRC})
 target_include_directories(
     tq
     PUBLIC "${CMAKE_SOURCE_DIR}/include/server/vnode/tq"
+    PUBLIC "${CMAKE_SOURCE_DIR}/include/libs/wal"
     PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/inc"
     PRIVATE "${CMAKE_SOURCE_DIR}/include/os"
 )
 
 target_link_libraries(
-    os
+    wal
 )