消息日志记录协议中的恢复成本

Sriram Rao, L. Alvisi, H. Vin
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引用次数: 89

摘要

过去对消息日志的研究主要集中在研究在无故障执行期间悲观、乐观和因果协议所带来的相对开销。我们对这些协议在恢复期间的性能进行了首次实验评估。我们发现,如果可以容忍单个故障,悲观和因果协议表现最好,因为它们避免了正确过程的回滚。然而,对于多重故障,决定性能的主要因素变成了记录恢复信息的位置(即发送方、接收方或系统中某个进程子集的复制),而不是记录这些信息的时间(即,记录是同步的还是异步的)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The cost of recovery in message logging protocols
Past research in message logging has focused on studying the relative overhead imposed by pessimistic, optimistic, and causal protocols during failure-free executions. We give the first experimental evaluation of the performance of these protocols during recovery. We discover that, if a single failure is to be tolerated, pessimistic and causal protocols perform best, because they avoid rollbacks of correct processes. For multiple failures, however, the dominant factor in determining performance becomes where the recovery information is logged (i.e. at the sender, at the receiver, or replicated at a subset of the processes in the system) rather than when this information is logged (i.e. if logging is synchronous or asynchronous).
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