如果主应用服务器出现故障，故障将自动转移到备份服务器。
The application servers will automatically fail over to backup servers should the primary fail.
主节点和备份节点连接到一台IBM DS4500存储服务器。
The master and the backup node is connected to an IBM DS4500 storage server.
在灾难恢复场景中，RSS服务器在地理上可以远离主服务器，充当远程备份服务器。
RSS servers can be geographically distant from the primary server, serving as remote back-up servers in disaster-recovery scenarios.
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