例如，是否可以启动、停止、备份及在系统失败后恢复和进行维护？
For example, can it be started, stopped, backed up, and recovered after a system failure as well as maintained?
如果活动aws实例失败了，您可以启动一个新实例并重用现有的EBS存储恢复服务器。
If your live AWS instance fails, you can start a new instance and reuse the existing EBS storage to restore your server.
以只读方式打开物理备库可以延长失败或中断恢复的时间，因为数据库必须在故障切换后重新启动。
Opening the physical standby database read-only may lengthen the time it takes to recover from a failure or outage, because the database must be restarted after a failover.
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