HRAID6ML: A hybrid RAID6 storage architecture with mirrored logging

012 IEEE 28th Symposium on Mass Storage Systems and Technologies (MSST) Pub Date : 2012-04-16 DOI:10.1109/MSST.2012.6232374

Lingfang Zeng, D. Feng, Jianxi Chen, Q. Wei, B. Veeravalli, Wenguo Liu

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引用次数: 16

Abstract

The RAID6 provides high reliability using double-parity-update at cost of high write penalty. In this paper, we propose HRAID6ML, a new logging architecture for RAID6 systems for enhanced energy efficiency, performance and reliability. HRAID6ML explores a group of Solid State Drives (SSDs) and Hard Disk Drives (HDDs): Two HDDs (parity disks) and several SSDs form RAID6. The free space of the two parity disks is used as mirrored log region of the whole system to absorb writes. The mirrored logging policy helps to recover system from parity disk failure. Mirrored logging operation does not introduce noticeable performance overhead to the whole system. HRAID6ML eliminates the additional hardware and energy costs, potential single point of failure and performance bottleneck. Furthermore, HRAID6ML prolongs the lifecycle of the SSDs and improves the systems energy efficiency by reducing the SSDs write frequency. We have implemented proposed HRAID6ML. Extensive trace-driven evaluations demonstrate the advantages of the HRAID6ML system over both traditional SSD-based RAID6 system and HDD-based RAID6 system.

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HRAID6ML:带有镜像日志记录的混合RAID6存储架构

RAID6使用双奇偶校验更新提供高可靠性，但代价是高写代价。在本文中，我们提出了一种新的用于RAID6系统的日志架构HRAID6ML，以提高能源效率、性能和可靠性。HRAID6ML研究一组固态驱动器(ssd)和硬盘驱动器(hdd):两个hdd(奇偶校验磁盘)和几个ssd组成RAID6。两个奇偶校验盘的空闲空间用作整个系统的镜像日志区来吸收写操作。镜像日志策略有助于从奇偶磁盘故障中恢复系统。镜像日志操作不会给整个系统带来明显的性能开销。HRAID6ML消除了额外的硬件和能源成本、潜在的单点故障和性能瓶颈。此外，HRAID6ML通过降低ssd写频率，延长了ssd的生命周期，提高了系统的能源效率。我们已经实现了建议的HRAID6ML。广泛的跟踪驱动评估表明，HRAID6ML系统优于传统的基于ssd的RAID6系统和基于hdd的RAID6系统。

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012 IEEE 28th Symposium on Mass Storage Systems and Technologies (MSST)

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