为实时可靠的分布式服务构建中间件

F. Travostino, L. Feeney, P. Bernadat, F. Reynolds
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引用次数: 1

摘要

我们认为,如果一个实时的、分布式的服务即使在出现部分故障的情况下仍然具有及时的、可预测的行为,那么它就是可靠的。在许多实时场景中,包括工厂车间自动化、医疗监控设备和作战系统,都需要具有此属性的服务。大多数使用现代容错工具包构建的分布式服务都不可靠;它们在失败条件下表现出不可预测的行为模式,尽管逻辑上是正确的。我们已经为实时可靠的服务明确地设计和实现了中间件。我们的目标是为故障检测和恢复维持亚秒级的最坏情况保证,即使故障与网络负载和CPU负载合谋破坏了确定性。本文报告了我们将软件容错和实时规程结合起来的经验,从需求的定义到结果系统的特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Building middleware for real-time dependable distributed services
We consider a real-time, distributed service to be dependable if it continues to have timely, predictable behavior even in the presence of partial failures. Services with this property are desirable in a host of real-time scenarios, including factory floor automation, medical monitoring equipment, and combat systems. Most distributed services built with contemporary fault-tolerance toolkits are not dependable; they exhibit unpredictable, albeit logically correct, behavioral patterns under failure conditions. We have designed and implemented middleware explicitly for real-time dependable services. We aimed at maintaining sub-second worst-case guarantees for failure detection and recovery, even when failures conspire with network load and CPU load to undermine determinism. The paper reports our experience in marrying software fault tolerance and real-time disciplines, from the definition of the requirements to the characterization of the resulting system.
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