Java面试题集群的相关内容

Java 最常见的面试题：集群中有 3 台服务器，其中一个节点宕机，这个时候 zookeeper 还可以使用吗？

可以继续使用，单数服务器只要没超过一半的服务器宕机就可以继续使用。

Java 最常见的面试题：集群中为什么要有主节点？

在分布式环境中，有些业务逻辑只需要集群中的某一台机器进行执行，其他的机器可以共享这个结果，这样可以大大减少重复计算，提高性能，所以就需要主节点。

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Java 最常见的面试题：使用 kafka 集群需要注意什么？

集群的数量不是越多越好，最好不要超过 7 个，因为节点越多，消息复制需要的时间就越长，整个群组的吞吐量就越低。集群数量最好是单数，因为超过一半故障集群就不能用了，设置为单数容错率更高。

Java 最常见的面试题：rabbitmq 对集群节点停止顺序有要求吗？

RabbitMQ 对集群的停止的顺序是有要求的，应该先关闭内存节点，最后再关闭磁盘节点。如果顺序恰好相反的话，可能会造成消息的丢失。

Java 最常见的面试题：rabbitmq 集群中唯一一个磁盘节点崩溃了会发生什么情况？

如果唯一磁盘的磁盘节点崩溃了，不能进行以下操作：不能创建队列不能创建交换器不能创建绑定不能添加用户不能更改权限不能添加和删除集群节点唯一磁盘节点崩溃了，集群是可以保持运行的，但你不能更改任何东西。

Java 最常见的面试题： rabbitmq 集群搭建需要注意哪些问题？

各节点之间使用“--link”连接，此属性不能忽略。各节点使用的 erlang cookie 值必须相同，此值相当于“秘钥”的功能，用于各节点的认证。整个集群中必须包含一个磁盘节点。

Java 最常见的面试题：rabbitmq 集群有什么用？

集群主要有以下两个用途：高可用：某个服务器出现问题，整个 RabbitMQ 还可以继续使用；高容量：集群可以承载更多的消息量。

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更新时间 2024-02-24 09:39:37

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