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设置检查点是容错计算机系统进行故障恢复的重要手段。因为检查点间隔选择过大或过小都将使系统性能受到影响,所以检查点间隔的适当选定是系统性能优化的一个重要指标。该文针对双机容错系统,采用检查点设置与回卷恢复的方法提出了一种系统模型,利用马尔科夫链得到了最佳检查点间隔的求解等式,通过实验证实了求解等式的正确性。
Setting checkpoints is an important means of fault-tolerant computer system failure recovery. Because the checkpoint interval is too large or too small choice will affect the performance of the system, so checkpoint interval of the appropriate selection is an important indicator of system performance optimization. This paper presents a system model based on checkpointing and roll-back method for dual-plane fault-tolerant system. The optimal checkpoint interval is obtained by using Markov chain. The experimental results show that the solution of equation Correctness