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首页> 外文会议>International Conference on Parallel Processing >EC-FRM: An Erasure Coding Framework to Speed Up Reads for Erasure Coded Cloud Storage Systems
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EC-FRM: An Erasure Coding Framework to Speed Up Reads for Erasure Coded Cloud Storage Systems

机译：EC-FRM：一种擦除编码框架，可加快对擦除编码云存储系统的读取

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摘要

With the reliability requirements increasingly important, erasure codes have been widely used in today's cloud storage systems because they achieve both high reliability and low storage overhead. However, the performance for most existing erasure codes can be further improved on both normal reads to user's data without device failures and degraded reads under device failures, which are crucial in cloud storage systems. In this paper, we propose an erasure coding framework named EC-FRM to integrate existing codes in order to improve the read performance. The constructed code over EC-FRM named EC-FRM-Code, which keeps most of wonderful properties of the integrated code and achieves good performance on both normal reads and degraded reads. We transform Reed-Solomon code and LRC code to EC-FRM-RS and EC-FRM-LRC respectively, and then conduct a series of experiments to evaluate their read performance. The results show that EC-FRM-RS code gains 19.2% to 33.9% higher normal read speed and 9.1% to 9.9% higher degraded read speed than standard Reed-Solomon code, while EC-FRM-LRC code owns 23.5% to 46.9% higher normal read speed and 3.3% to 12.8% higher degraded read speed than standard LRC code.
机译：随着可靠性要求变得越来越重要，擦除代码已在当今的云存储系统中得到广泛使用，因为它们既实现了高可靠性又降低了存储开销。但是，大多数现有擦除代码的性能都可以在没有设备故障的情况下正常读取用户数据，以及在设备故障下的降级读取（这在云存储系统中至关重要）都可以得到进一步改善。在本文中，我们提出了一种称为EC-FRM的擦除编码框架，以集成现有代码，以提高读取性能。通过EC-FRM构造的名为EC-FRM-Code的代码，保留了集成代码的大部分出色特性，并且在常规读取和降级读取上均具有良好的性能。我们将Reed-Solomon码和LRC码分别转换为EC-FRM-RS和EC-FRM-LRC，然后进行一系列实验以评估其读取性能。结果表明，与标准的Reed-Solomon码相比，EC-FRM-RS代码的正常读取速度提高了19.2％至33.9％，降级的读取速度提高了9.1％至9.9％，而EC-FRM-LRC代码拥有23.5％至46.9％与标准LRC代码相比，它的正常读取速度更高，降级的读取速度也更高3.3％至12.8％。

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