diff --git a/include/libs/lru/lru.h b/include/libs/lru/lru.h
new file mode 100644
index 0000000000000000000000000000000000000000..c82e8ed7468a1a6107c893deb1d0ad43c7e13a4e
--- /dev/null
+++ b/include/libs/lru/lru.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_LRU_H_
+#define _TD_LRU_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_LRU_H_*/
\ No newline at end of file
diff --git a/source/libs/CMakeLists.txt b/source/libs/CMakeLists.txt
index ed6d2bef4f74d0608c106623aa5c208ccfb93f31..c1bec69cd25bea698b81fe28f52f98317c9501a5 100644
--- a/source/libs/CMakeLists.txt
+++ b/source/libs/CMakeLists.txt
@@ -4,4 +4,5 @@ add_subdirectory(tkv)
 add_subdirectory(index)
 add_subdirectory(wal)
 add_subdirectory(parser)
-add_subdirectory(scheduler)
\ No newline at end of file
+add_subdirectory(scheduler)
+add_subdirectory(lru)
\ No newline at end of file
diff --git a/source/libs/lru/CMakeLists.txt b/source/libs/lru/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b65615dbbfcee28fd6da898dd6c1c69d6a177e18
--- /dev/null
+++ b/source/libs/lru/CMakeLists.txt
@@ -0,0 +1,7 @@
+aux_source_directory(src LRU_SRC)
+add_library(lru ${LRU_SRC})
+target_include_directories(
+    lru
+    PUBLIC "${CMAKE_SOURCE_DIR}/include/libs/lru"
+    PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/inc"
+)
\ No newline at end of file
diff --git a/source/libs/lru/inc/lruInt.h b/source/libs/lru/inc/lruInt.h
new file mode 100644
index 0000000000000000000000000000000000000000..e0da680104e898dc20408071af4f5fc2cb3ef29a
--- /dev/null
+++ b/source/libs/lru/inc/lruInt.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_LRU_INT_H_
+#define _TD_LRU_INT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_LRU_INT_H_*/
\ No newline at end of file
diff --git a/source/libs/lru/src/lru.c b/source/libs/lru/src/lru.c
new file mode 100644
index 0000000000000000000000000000000000000000..6dea4a4e57392be988126c579648f39a8270b9bf
--- /dev/null
+++ b/source/libs/lru/src/lru.c
@@ -0,0 +1,14 @@
+/*
+ * 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/>.
+ */
\ No newline at end of file
diff --git a/source/libs/lru/test/lruTests.cpp b/source/libs/lru/test/lruTests.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391