ALTER-SYSTEM-MODIFY-BACKEND

ALTER-SYSTEM-MODIFY-BACKEND

Name

ALTER SYSTEM MKDIFY BACKEND

Description

修改 BE 节点属性（仅管理员使用！）

语法：

• 通过 host 和 port 查找 backend

ALTER SYSTEM MODIFY BACKEND "host:heartbeat_port" SET ("key" = "value"[, ...]);

• 通过 backend_id 查找 backend

ALTER SYSTEM MODIFY BACKEND "id1" SET ("key" = "value"[, ...]);

说明：

1. host 可以是主机名或者ip地址
2. heartbeat_port 为该节点的心跳端口
3. 修改 BE 节点属性目前支持以下属性：

• tag.xxx：资源标签
• disable_query: 查询禁用属性
• disable_load: 导入禁用属性

注：

1. 可以给一个 Backend 设置多种资源标签。但必须包含 "tag.location"。

Example

1. 修改 BE 的资源标签

   ALTER SYSTEM MODIFY BACKEND "host1:heartbeat_port" SET ("tag.location" = "group_a");
   ALTER SYSTEM MODIFY BACKEND "host1:heartbeat_port" SET ("tag.location" = "group_a", "tag.compute" = "c1");

   ALTER SYSTEM MODIFY BACKEND "id1" SET ("tag.location" = "group_a");
   ALTER SYSTEM MODIFY BACKEND "id1" SET ("tag.location" = "group_a", "tag.compute" = "c1");

2. 修改 BE 的查询禁用属性

   ALTER SYSTEM MODIFY BACKEND "host1:heartbeat_port" SET ("disable_query" = "true");

   ALTER SYSTEM MODIFY BACKEND "id1" SET ("disable_query" = "true");

3. 修改 BE 的导入禁用属性

   ALTER SYSTEM MODIFY BACKEND "host1:heartbeat_port" SET ("disable_load" = "true");

   ALTER SYSTEM MODIFY BACKEND "id1" SET ("disable_load" = "true");

Keywords

ALTER, SYSTEM, ADD, BACKEND, ALTER SYSTEM

Best Practice