多重条带布局的混合RAID系统研究

发布时间：2018-01-03 12:25

本文关键词：多重条带布局的混合RAID系统研究　出处：《小型微型计算机系统》2017年05期 　论文类型：期刊论文

【摘要】：随着数据容量的爆炸式增长以及数据价值的日益增加,应用对存储系统的容量、成本、数据可靠性和数据访问性能等方面提出越来越高的要求.针对纠删码存储存在的与传统RAID技术所面临相同的小写更新与Write Hole的问题,提出一种多重条带布局的Hybrid-RAID技术.该技术采用纠删码,对外提供N+M的数据可靠性保护级别,降低冗余数据的存储开销;采用同步镜像小写、异步镜像转换纠删码的方式,并且保证转换过程无数据覆盖和迁移,从而有效解决同步纠删码的小写更新问题;通过纠删码数据块与校验块的非原位更新,避免纠删码的Write Hole问题.测试结果表明,与RAID6相比,Hybrid-RAID系统的顺序小写性能平均提升了2.05倍,随机小写平均提升6.6倍.
[Abstract]:With the explosive growth of data capacity and the increasing value of data, the application of storage system capacity, cost. The requirement of data reliability and data access performance is becoming higher and higher. For erasure code storage, the same lowercase update and Write Hole problems as traditional RAID technology are faced. In this paper, a multi-band layout Hybrid-RAID technique is proposed, which uses erasure codes to provide data reliability protection level of N M and reduces the storage overhead of redundant data. Using synchronous image lowercase, asynchronous image transformation erasure code, and ensuring that the conversion process without data coverage and migration, so as to effectively solve the problem of lowercase update of synchronous erasure code; The Write Hole problem of erasure code is avoided by updating the data block of erasure code and the block of check in situ. The test results show that the problem is compared with that of RAID6. The sequential lowercase performance of the Hybrid-RAID system is increased by an average of 2.05 times, and the random lowercase performance by 6.6 times.
【作者单位】：中国科学院计算技术研究所;中国科学院大学;
【基金】：中国科学院先导专项基金项目(XDA06010401)资助天津市科技计划项目(15ZXDSGX00020)资助
【分类号】：TP333
【正文快照】： 1引言存储规模的不断扩大,用户数量的不断攀升,使得数据存储的可靠性越来越受到工业界的关注.副本技术的引入,极大地提高了数据可靠性,同时也带来了一个重要的挑战:副本数量的增加,导致存储带宽和存储成本呈线性增长.为应对这个挑战,RAID技术以其极高的数据可靠性,低廉的存储

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