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电子学报  2015 

基于NAND闪存的高性能和可靠的PRAID-6

DOI: 10.3969/j.issn.0372-2112.2015.06.026, PP. 1211-1217

Keywords: RAID-6,固态硬盘,垃圾回收,部分校验,非易失性存储器

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Abstract:

基于固态硬盘的RAID-6阵列,在每次数据更新时,都需要计算和写入校验信息,降低了阵列的性能和缩短了固态硬盘的使用寿命,该论文提出了一种基于延迟写入校验信息策略的RAID-6,称为PRAID-6.在每次数据更新时,PRAID-6只计算部分校验信息,写入非易失性存储器P-Cache.在垃圾回收时,将部分校验信息与原校验信息合并,产生新的校验信息,写入固态硬盘.通过实验测试结果表明PRAID-6的响应时间比RAID-6减少了30%,比RAID-5减少了10%.垃圾回收开销比RAID-6减少了20%,比RAID-5减少了15%.

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