When a failure does occur, data that has not been written out before the failure occurred might be lost, regardless of whether the server is using database or DRS persistence.
的确出现故障时，在故障出现前未写出的数据可能会丢失，并不会因为服务器使用数据库还是DRS持久性解决方案而有所差别。
When something goes wrong, tracing back through the flow to determine when and where a failure occurred is complex and time-consuming.
当某个地方出错时，在流中追溯以确定何时及何处发生错误将非常复杂和耗时。
How is the standby machine being used when a failure has not occurred?
当没有出现故障时，如何使用备用机器？
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