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A performance evaluation study of pipeline TMR systems

机译:管道TMR系统性能评估研究

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摘要

A distributed system in which a job can be broken into a number of subjobs which are processed sequentially at various processors is considered. The performance of such a system is then compared to the replicated (triple modular redundant, or TMR) version of the system in which each subjob will require concurrent replicated processing with majority voting. The effect of voting times and processor failure rates on the performance of the system is investigated with analytical approximations and computer simulations. The accuracy of the former is examined. The results indicate the possible existence of a threshold voting time, below which the TMR system performs better than the unreplicated one, and above which the situation is reversed. Such thresholds are observed, where possible, in systems with repairable servers, as well as in those with nonrepairable servers.
机译:考虑了一种分布式系统,在该系统中,一个作业可以分解为多个子作业,这些子作业在各种处理器处依次处理。然后将这种系统的性能与系统的复制版本(三重模块冗余或TMR)进行比较,在该版本中,每个子作业都需要并发复制处理,且投票多数。通过分析近似和计算机仿真研究投票时间和处理器故障率对系统性能的影响。检查前者的准确性。结果表明可能存在阈值投票时间,低于该阈值投票时间,TMR系统的性能要优于未复制的阈值投票时间,而高于该阈值的情况则可以逆转。在可能的情况下,在具有可修复服务器的系统以及具有不可修复服务器的系统中会观察到此类阈值。

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