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arXiv 1102.0204cs.ITcs.DCmath.IT
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用协调自适应再生码修复多故障

Repairing Multiple Failures with Coordinated and Adaptive Regenerating Codes

Anne-Marie Kermarrec, Gilles Straub, Nicolas Le Scouarnec

摘要:

纠删码被广泛用于分布式存储系统中数据的持久性。本文讨论了在这种代码中的多个故障的同时修复。我们超越现有的工作(即,由Dimakis等人重新生成代码)通过描述(i)支持多个设备的同时修复的协调再生代码(也称为协作再生代码),以及(ii)允许在每次修复时调整参数的自适应再生代码。类似于Dimakis等人的重新生成代码,这些代码实现了存储和修复带宽之间的最佳折衷。基于这些扩展的再生代码,我们研究的影响,懒惰的修复适用于再生代码,并得出结论,懒惰的修复不能降低成本的网络带宽,但允许减少磁盘相关的成本(磁盘带宽和磁盘I/O)。

英文摘要:

Erasure correcting codes are widely used to ensure data persistence in distributed storage systems. This paper addresses the simultaneous repair of multiple failures in such codes. We go beyond existing work (i.e., regenerating codes by Dimakis et al.) by describing (i) coordinated regenerating codes (also known as cooperative regenerating codes) which support the simultaneous repair of multiple devices, and (ii) adaptive regenerating codes which allow adapting the parameters at each repair. Similarly to regenerating codes by Dimakis et al., these codes achieve the optimal tradeoff between storage and the repair bandwidth. Based on these extended regenerating codes, we study the impact of lazy repairs applied to regenerating codes and conclude that lazy repairs cannot reduce the costs in term of network bandwidth but allow reducing the disk-related costs (disk bandwidth and disk I/O).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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