Dubbo的负载均衡

和Dubbo其他的配置类似，多个配置是有覆盖关系的：

方法级优先，接口级次之，全局配置再次之。
如果级别一样，则消费方优先，提供方次之。
所以，上面4种配置的优先级是:

1. 客户端方法级别配置。
2. 客户端接口级别配置。
3. 服务端方法级别配置。
4. 服务端接口级别配置。

优先级应该是1->3->2->4

Review the Dubbo documentation section covering load-balancing configuration precedence and compare the listed order with the method/interface and client/provider rules in the issue. Update the explanation so the precedence is consistent throughout, then verify that the final wording clearly presents the intended order.

Written by the indexing model from the issue text.