diff --git a/src/controller/allocation_controller.py b/src/controller/allocation_controller.py
index 89dc24f..365215a 100644
--- a/src/controller/allocation_controller.py
+++ b/src/controller/allocation_controller.py
@@ -4,7 +4,7 @@
 Author: Zella Zhong
 Date: 2024-05-23 22:47:04
 LastEditors: Zella Zhong
-LastEditTime: 2024-05-24 05:20:48
+LastEditTime: 2024-05-24 05:44:35
 FilePath: /id_allocation/src/controller/allocation_controller.py
 Description: allocation controller
 '''
@@ -67,7 +67,7 @@ def allocation(self):
             ssql = "SELECT * FROM process_id_allocation(%s, '%s', %d);" % (process_vids, graph_id, updated_nanosecond)
             cursor.execute(ssql)
             rows = [dict_factory(cursor, row) for row in cursor.fetchall()]
-            logging.debug("allocation vids: {}, result: {}".format(process_vids, rows))
+            logging.info("allocation vids: {}, result: {}".format(process_vids, rows))
             if len(rows) == 0:
                 cursor.close()
                 pg_conn.close()
diff --git a/src/controller/hello_controller.py b/src/controller/hello_controller.py
new file mode 100644
index 0000000..60de626
--- /dev/null
+++ b/src/controller/hello_controller.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+'''
+Author: Zella Zhong
+Date: 2024-05-24 05:41:52
+LastEditors: Zella Zhong
+LastEditTime: 2024-05-24 05:44:12
+FilePath: /id_allocation/src/controller/hello_controller.py
+Description: 
+'''
+from httpsvr import httpsvr
+
+
+class HelloController(httpsvr.BaseController):
+    def __init__(self, obj, param=None):
+        super(HelloController, self).__init__(obj)
+
+    def hello(self):
+        return httpsvr.Resp(msg="pong", data={}, code=0)
diff --git a/src/data_server.py b/src/data_server.py
index d2b4fea..68a5589 100644
--- a/src/data_server.py
+++ b/src/data_server.py
@@ -4,7 +4,7 @@
 Author: Zella Zhong
 Date: 2024-05-23 22:34:52
 LastEditors: Zella Zhong
-LastEditTime: 2024-05-24 05:18:37
+LastEditTime: 2024-05-24 05:44:41
 FilePath: /id_allocation/src/data_server.py
 Description: main entry point for allocating
 '''
@@ -14,6 +14,7 @@
 import setting
 import setting.filelogger as logger
 
+from controller.hello_controller import HelloController
 from controller.allocation_controller import AllocationController
 
 
@@ -29,6 +30,7 @@
         from httpsvr import httpsvr
         # [path, controller class, method]
         ctrl_info = [
+            ["/", HelloController, "hello"],
             ["/id_allocation/allocation", AllocationController, "allocation"],
         ]
         svr = httpsvr.HttpSvr(config, ctrl_info)
diff --git a/src/setting/filelogger.py b/src/setting/filelogger.py
index 4638341..247e7d0 100644
--- a/src/setting/filelogger.py
+++ b/src/setting/filelogger.py
@@ -294,7 +294,7 @@ def InitLogger(config):
         logger.setLevel(static_file_handler.level)
     else:
         static_file_handler = FileHandler(config)
-        static_file_handler.setLevel(logging.DEBUG)
+        static_file_handler.setLevel(logging.INFO)
         static_file_handler.setPrintStd()
         static_file_handler.setFormatter(Formatter())