diff --git a/src/json2iris.c b/src/json2iris.c
index a746eef..e1236b0 100644
--- a/src/json2iris.c
+++ b/src/json2iris.c
@@ -339,7 +339,7 @@ int direct_write_rule(cJSON *json, struct maat_kv_store *str2int,
 	int i = 0;
     int ret = -1;
 	cJSON dummy;
-    
+
 	for (i = 0; i < cmd_cnt; i++) {
 		cJSON *item = cJSON_GetObjectItem(json, cmd[i].json_string);
 		if (NULL == item && (1 == cmd[i].empty_allowed)) {
@@ -1088,32 +1088,17 @@ int json2iris(const char *json_buff, const char *json_filename,
 	tmp_obj = cJSON_GetObjectItem(json, "compile_table");
 	if (tmp_obj) {
 		compile_tbl_name = tmp_obj->valuestring;
-	} else {
-        log_error(logger, MODULE_JSON2IRIS,
-                  "[%s:%d] json file:%s has no [compile_table] field", 
-                  __FUNCTION__, __LINE__, json_filename);
-        goto error_out;
-    }
+	}
 
 	tmp_obj = cJSON_GetObjectItem(json, "group2compile_table");
 	if (tmp_obj) {
 		group2compile_tbl_name = tmp_obj->valuestring;
-	} else {
-        log_error(logger, MODULE_JSON2IRIS,
-                  "[%s:%d] json file:%s has no [group2compile_table] field", 
-                  __FUNCTION__, __LINE__, json_filename);
-        goto error_out;
-    }
+	}
 
 	tmp_obj = cJSON_GetObjectItem(json, "group2group_table");
 	if (tmp_obj) {
 		group2group_tbl_name = tmp_obj->valuestring;
-	} else {
-        log_error(logger, MODULE_JSON2IRIS,
-                  "[%s:%d] json file:%s has no [group2group_table] field", 
-                  __FUNCTION__, __LINE__, json_filename);
-        goto error_out;
-    }
+	}
 
 	ret = set_iris_descriptor(json_filename, json, encrypt_key, encrypt_algo, 
                               compile_tbl_name, group2compile_tbl_name, 
diff --git a/tools/maat_redis_tool.cpp b/tools/maat_redis_tool.cpp
index 68c5072..1624afb 100644
--- a/tools/maat_redis_tool.cpp
+++ b/tools/maat_redis_tool.cpp
@@ -26,6 +26,7 @@ void maat_tool_print_usage(void)
 	printf("\t-p [port], redis port, 6379 as default.\n");
 	printf("\t-n [db], redis db, 0 as default.\n");
 	printf("\t-d [dir], dump rules from redis to [dir], %s as default.\n", redis_dump_dir);
+    printf("\t-u [dir], flush redis and upload full rules to redis, confirm the risk before proceeding\n");
 	printf("\t-v [version], dump specific [version] from redis, dump latest version as default.\n");
 	printf("\t-j [payload.json], add or delete rules as maat json. Must have field compile_table field, and plugin table's valid flag must be in the last column.\n");
 	printf("\t-t [timeout], timeout config after t seconds, default is 0 which means never timeout.\n");