对于通常的事务性工作负载，从成员出故障到页面被恢复并可供另一个事务使用，通常只需20秒甚至更少的时间。
For typical transactional workloads, the time from the member failure until the time the pages are recovered and available to another transaction is typically 20 seconds or less.
我们需要测试性能、可靠性、稳定性，并需要取得最快的故障转移时间，其目标故障转移时间要少于60秒。
We wanted to test for performance, reliability, stability and the requirement to achieve the fastest failover time with a target failover time below 60 seconds.
当检测到故障时，RPR交换的机制能在不足50毫秒的时间内恢复网络。
When a failure is detected, the RPR switching mechanism restores networks in less than 50 millisec.
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