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首页> 外文会议>Annual IEEE/IFIP International Conference on Dependable Systems and Networks >Reconsidering Single Failure Recovery in Clustered File Systems
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Reconsidering Single Failure Recovery in Clustered File Systems

机译：重新考虑群集文件系统中的单一故障恢复

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摘要

How to improve the performance of single failure recovery has been an active research topic because of its prevalence in large-scale storage systems. We argue that when erasure coding is deployed in a cluster file system (CFS), existing single failure recovery designs are limited in different aspects: neglecting the bandwidth diversity property in a CFS architecture, targeting specific erasure code constructions, and no special treatment on load balancing during recovery. In this paper, we reconsider the single failure recovery problem in a CFS setting, and propose CAR, a cross-rack-aware recovery algorithm. For each stripe, CAR finds a recovery solution that retrieves data from the minimum number of racks. It also reduces the amount of cross-rack repair traffic by performing intra-rack data aggregation prior to cross-rack transmission. Furthermore, by considering multi-stripe recovery, CAR balances the amount of cross-rack repair traffic across multiple racks. Evaluation results show that CAR can effectively reduce the amount of cross-rack repair traffic and the resulting recovery time.
机译：由于其在大规模存储系统中的普遍性，如何提高单故障恢复的性能一直是一个活跃的研究主题。我们认为，当擦除编码部署在群集文件系统（CFS）中时，现有的单个故障恢复设计将在不同方面受到限制：忽略CFS体系结构中的带宽多样性属性，针对特定的擦除代码构造，并且不对负载进行特殊处理恢复期间保持平衡。在本文中，我们重新考虑了CFS设置中的单个故障恢复问题，并提出了CAR（一种跨机架感知的恢复算法）。对于每个条带，CAR都会找到一种恢复解决方案，该解决方案可以从最少数量的机架中检索数据。通过在跨机架传输之前执行机架内数据聚合，它还减少了跨机架维修流量。此外，通过考虑多级恢复，CAR可以平衡多个机架之间的跨机架维修流量。评估结果表明，CAR可以有效减少跨机架维修流量，并缩短恢复时间。

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