一种面向RAID6固态阵列的数据盘失效快速修复方法

发布时间：2018-03-03 08:29

本文选题：RAID编码　切入点：额外冗余　出处：《计算机研究与发展》2015年S2期 　论文类型：期刊论文

【摘要】：近年来,闪存正被越来越广泛地应用到各种各样的存储系统当中.同时,闪存技术的革新促使单个设备存储容量剧增,这导致了基于固态硬盘的阵列(RAIS)系统中单设备失效的修复时间急剧增加,在其恢复过程中将有更高的概率影响到其他设备的可靠性,从而降低整个系统的可靠性.针对实际RAID6系统应用中较为广泛的RDP编码进行分析和问题抽象化,提出了一种基于固态硬盘阵列的编码算法RAIS+方法,并证明了其优越性.RAIS+方法通过添加一个冗余盘来减少大容量单盘失效的修复时间.RAIS+方法权衡了系统的可靠性、性能、写更新、负载情况以及可行性.例如,RAIS+方法在原8个设备的RAID6系统上,任意单个数据盘失效的修复时间能够减少约为18.5%.
[Abstract]:In recent years, flash memory has been more and more widely used in a variety of storage systems. At the same time, the innovation of flash memory technology has greatly increased the storage capacity of individual devices. This leads to a sharp increase in the repair time of a single device failure in an array of rais systems based on a solid state hard disk, which will have a higher probability of affecting the reliability of other devices during the recovery process. In order to reduce the reliability of the whole system, aiming at the analysis and abstraction of the RDP coding which is widely used in the practical RAID6 system, a coding algorithm RAIS based on solid-state hard disk array is proposed. It is proved that the rais method can reduce the repair time of large capacity single disk failure by adding a redundant disk. The method has weighed the reliability, performance, writing and updating of the system. For example, the repair time of any single data disk failure can be reduced to about 18.5on the RAID6 system of the original 8 equipments.
【作者单位】：国防科学技术大学计算机学院;
【基金】：国家自然科学基金重点项目(NSFC61232003;NSFC61332003)
【分类号】：TP333

【相似文献】