What is RPO and RTO? What RPO and RTO are supported with a Multi-AZ deployment?
什么是 RPO 和 RTO？ 多可用区部署支持哪些 RPO 和 RTO?
RPO is an acronym for Recovery Point Objective and is a term to describe the data recency guarantee in the event of failures. RPO is the maximum acceptable amount of time since the last data recovery point. This determines what is considered an acceptable loss of data between the last recovery point and the interruption of service. Redshift Multi-AZ supports RPO = 0 meaning data is guaranteed to be current and up to date in the event of a failure. Our pre-launch tests found that RTO with Amazon Redshift Multi-AZ deployments is under 60 seconds or less in the unlikely case of an AZ failure.
RPO 是恢复点目标（Recovery Point Objective）的缩写，是描述故障情况下数据新鲜度保证的术语。RPO 指的是自上次数据恢复点以来可接受的最大时间长度。这决定了在最后一个恢复点和服务中断之间，哪些数据丢失被认为是可接受的。Redshift 多可用区支持 RPO = 0，这意味着在发生故障时，可以保证数据是最新的。我们的预发布测试发现，在出现可用区故障（这种情况不太可能发生）的情况下，Amazon Redshift 多可用区部署的 RTO 不到 60 秒或更短。