S-RAID中基于连续数据特征的写优化策略

发布时间：2018-06-26 21:35

本文选题：连续数据存储 + 节能　；参考：《计算机学报》2014年03期

【摘要】：节能型磁盘阵列S-RAID通过对磁盘分组,关闭部分磁盘,降低存储系统部分性能来实现节能.为避免启动已关闭磁盘而产生额外能耗,S-RAID中的写操作全部采用"读-改-写"方式,影响了S-RAID的写性能.本研究提出一种S-RAID的优化结构:LS-RAID,在不提高存储系统能耗的条件下,优化S-RAID的写性能.LS-RAID适用于以连续访问为主的应用,通过磁盘分区,分离存储系统中的随机访问和顺序访问,降低了随机访问对存储系统性能的影响;提出一种数据增量校验算法,避免了写过程中对数据盘旧数据的读操作,降低了因"读-改-写"导致的写惩罚.实验表明,与S-RAID相比,在不增加系统能耗的情况下,LS-RAID的写速率可以提升至少56%.在提供相同写性能的条件下,LS-RAID可以关闭更多磁盘,进一步降低了存储系统能耗,提升了节能效果.
[Abstract]:Energy saving disk array S-RAID can save energy by grouping disks, closing some disks, reducing part of the storage system performance to save energy. In order to avoid the extra energy consumption to start off the disks, the write operation in S-RAID is all "read to write", which affects the writing ability of S-RAID. This study proposes a S-RAID optimization structure, LS-RAID, In the condition that the energy consumption of the storage system is not improved, the writing performance of the optimized S-RAID.LS-RAID is suitable for the application which is based on continuous access. The random access and sequential access in the storage system are separated through the disk partition, and the effect of random access on the performance of the storage system is reduced. A data increment check algorithm is proposed to avoid the writing process. The read operation of the old data of the data disk reduces the writing penalty caused by the "read to write". The experiment shows that, compared with S-RAID, the write rate of LS-RAID can be raised at least 56%. without increasing the energy consumption of the system, and the LS-RAID can shut down more disks under the condition of providing the same writing performance, further reducing the energy consumption of the storage system, and raising the energy consumption. Energy saving effect.
【作者单位】：北京理工大学计算机科学与技术学院;河北工业大学计算机科学与软件学院;北京理工大学北京市海量语言信息处理与云计算应用工程技术中心;
【基金】：国家“八六三”高技术研究发展计划项目基金(2013AA01A212) 国家自然科学基金(61370063)资助~~
【分类号】：TP333

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