In contrast to er, in a cluster, you cannot control the granularity of data replication; the entire server's data is always replicated.

与ER形成对比的是，在一个集群中，无法控制数据复制的粒度；而是始终复制整个服务器的数据。

youdao

The session data also needs to be replicated to other cluster nodes, in case the original cluster node goes down (failover scenario).

如果原始集群节点出现问题(故障转移情况)，则会话数据还必须复制到其他的集群节点。

youdao

Because data is replicated across the cluster, each server in the cluster has enough main memory to store the entire context data.

由于数据在整个集群中进行复制，集群中的每个服务器都有足够的主存来存储整个上下文数据。

youdao