High Performance and Reliable PRAID-6 Based on NAND

CHEN Jin-zhong; YAO Nian-min; CAI Shao-bin

doi:10.3969/j.issn.0372-2112.2015.06.026

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High Performance and Reliable PRAID-6 Based on NAND

更新时间：2025-07-16

- High Performance and Reliable PRAID-6 Based on NAND
- Acta Electronica Sinica Vol. 43, Issue 6, Pages: 1211-1217(2015)
- 作者机构：
  
  1. 哈尔滨工程大学计算机科学与技术学院,黑龙江,哈尔滨,150000
  2. 大连理工大学计算机科学与技术学院,辽宁,大连,116000
  3. 哈尔滨工程大学计算机科学与技术学院,黑龙江,哈尔滨,150000
  4. 大连理工大学计算机科学与技术学院,辽宁,大连,116000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61073047);Fund of Haerbin Science and Technology Talents Project of Heilongjiang Province (No.2012RFLXG023);Fundamental Research Funds for the Central Universities (No.HEUCFT)
- DOI：10.3969/j.issn.0372-2112.2015.06.026
  CLC： TP333.35
- Published：2015
- 稿件说明：
移动端阅览
CHEN Jin-zhong, YAO Nian-min, CAI Shao-bin. High Performance and Reliable PRAID-6 Based on NAND[J]. Acta Electronica Sinica, 2015, 43(6): 1211-1217.
DOI：

CHEN Jin-zhong, YAO Nian-min, CAI Shao-bin. High Performance and Reliable PRAID-6 Based on NAND[J]. Acta Electronica Sinica, 2015, 43(6): 1211-1217. DOI： 10.3969/j.issn.0372-2112.2015.06.026.

摘要

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%.

Abstract

Solid state drives (SSDs)-based RAID-6 calculates parity and writes it to disk array when data is updated

which decreases the performance of disk array and reduces the life time of SSDs.We propose a partial parity-based RAID-6 (PRAID-6)

which uses a delayed parity updating scheme to reduce the number of parity updates.Whenever a page is updated

PRAID-6 generates partial parity data of the stripe and stores it on a special non-volatile memory (NVRAM) called parity cache (P-Cache).The new parity is computed by partial parity and old version of parity when garbage collection mechanism is invoked.Then the new parity of the stripe is flushed to SSD.Experimental results show PRAID-6 reduces response time by 30% and 10% compared to RAID-5 and RAID-6

respectively.PRAID-6 reduces garbage collection overhead by 20% and 15% compared to RAID-6 and RAID-5

respectively.

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Related Institution

Department of Computer Science, University of Science and Technology of China

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