diff --git a/HISTORY b/HISTORY
index 5ec006f..152488a 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,7 @@
 
-Version 5.05  2014-11-21
+Version 5.05  2014-11-22
  * tracker_mem.c log more info
+ * remove useless global variable: g_network_tv
 
 Version 5.04  2014-09-16
  * add fastdfs.spec for build RPM on Linux
diff --git a/storage/storage_func.c b/storage/storage_func.c
index b4d4e08..b03e522 100644
--- a/storage/storage_func.c
+++ b/storage/storage_func.c
@@ -1047,7 +1047,6 @@ int storage_func_init(const char *filename, \
 		{
 			g_fdfs_network_timeout = DEFAULT_NETWORK_TIMEOUT;
 		}
-		g_network_tv.tv_sec = g_fdfs_network_timeout;
 
 		g_server_port = iniGetIntValue(NULL, "port", &iniContext, \
 					FDFS_STORAGE_SERVER_DEF_PORT);
diff --git a/storage/storage_global.c b/storage/storage_global.c
index 53a660c..602bdac 100644
--- a/storage/storage_global.c
+++ b/storage/storage_global.c
@@ -38,8 +38,6 @@ int g_file_distribute_path_mode = FDFS_FILE_DIST_PATH_ROUND_ROBIN;
 int g_file_distribute_rotate_count = FDFS_FILE_DIST_DEFAULT_ROTATE_COUNT;
 int g_fsync_after_written_bytes = -1;
 
-struct timeval g_network_tv = {DEFAULT_NETWORK_TIMEOUT, 0};
-
 int g_dist_path_index_high = 0; //current write to high path
 int g_dist_path_index_low = 0;  //current write to low path
 int g_dist_write_file_count = 0;  //current write file count
diff --git a/storage/storage_global.h b/storage/storage_global.h
index de8d771..d7f4b8d 100644
--- a/storage/storage_global.h
+++ b/storage/storage_global.h
@@ -84,8 +84,6 @@ extern int g_file_distribute_path_mode;
 extern int g_file_distribute_rotate_count;
 extern int g_fsync_after_written_bytes;
 
-extern struct timeval g_network_tv;
-
 extern int g_dist_path_index_high; //current write to high path
 extern int g_dist_path_index_low;  //current write to low path
 extern int g_dist_write_file_count; //current write file count
diff --git a/tracker/tracker_func.c b/tracker/tracker_func.c
index 79f0ce7..3dd814a 100644
--- a/tracker/tracker_func.c
+++ b/tracker/tracker_func.c
@@ -221,7 +221,6 @@ int tracker_load_from_conf_file(const char *filename, \
 		{
 			g_fdfs_network_timeout = DEFAULT_NETWORK_TIMEOUT;
 		}
-		g_network_tv.tv_sec = g_fdfs_network_timeout;
 
 		g_server_port = iniGetIntValue(NULL, "port", &iniContext, \
 				FDFS_TRACKER_SERVER_DEF_PORT);
diff --git a/tracker/tracker_global.c b/tracker/tracker_global.c
index 2061f46..ab12f08 100644
--- a/tracker/tracker_global.c
+++ b/tracker/tracker_global.c
@@ -16,8 +16,6 @@ int g_work_threads = DEFAULT_WORK_THREADS;
 int g_sync_log_buff_interval = SYNC_LOG_BUFF_DEF_INTERVAL;
 int g_check_active_interval = CHECK_ACTIVE_DEF_INTERVAL;
 
-struct timeval g_network_tv = {DEFAULT_NETWORK_TIMEOUT, 0};
-
 FDFSGroups g_groups;
 int g_storage_stat_chg_count = 0;
 int g_storage_sync_time_chg_count = 0; //sync timestamp
diff --git a/tracker/tracker_global.h b/tracker/tracker_global.h
index 16e37ad..5d165a8 100644
--- a/tracker/tracker_global.h
+++ b/tracker/tracker_global.h
@@ -47,8 +47,6 @@ extern FDFSStorageReservedSpace g_storage_reserved_space;
 extern int g_sync_log_buff_interval; //sync log buff to disk every interval seconds
 extern int g_check_active_interval; //check storage server alive every interval seconds
 
-extern struct timeval g_network_tv;
-
 extern int g_allow_ip_count;  /* -1 means match any ip address */
 extern in_addr_t *g_allow_ip_addrs;  /* sorted array, asc order */
 extern struct base64_context g_base64_context;
diff --git a/tracker/tracker_proto.h b/tracker/tracker_proto.h
index 3384f8c..353bc74 100644
--- a/tracker/tracker_proto.h
+++ b/tracker/tracker_proto.h
@@ -35,6 +35,7 @@
 #define TRACKER_PROTO_CMD_STORAGE_GET_STATUS	    71  //get storage status from tracker
 #define TRACKER_PROTO_CMD_STORAGE_GET_SERVER_ID	    70  //get storage server id from tracker
 #define TRACKER_PROTO_CMD_STORAGE_FETCH_STORAGE_IDS 69  //get all storage ids from tracker
+#define TRACKER_PROTO_CMD_STORAGE_GET_GROUP_NAME   109  //get storage group name from tracker
 
 #define TRACKER_PROTO_CMD_TRACKER_GET_SYS_FILES_START    61  //start of tracker get system data files
 #define TRACKER_PROTO_CMD_TRACKER_GET_SYS_FILES_END      62  //end of tracker get system data files