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基于页面写相关的闪存转换层策略

陈金忠,姚念民,蔡绍滨,战福瑞,孙美玲   

  1. 哈尔滨工程大学 计算机科学与技术学院,黑龙江 哈尔滨 150001
  • 出版日期:2013-06-25 发布日期:2013-06-15
  • 基金资助:
    国家自然科学基金资助项目(61073047);中央高校基本科研业务费专项基金资助项目(HEUCFT1007, HEUCF100607, HEUCFT1202);哈尔滨市科技创新人才专项基金资助项目(2012RFLXG023)

Page write-related scheme for flash translation layer

  • Online:2013-06-25 Published:2013-06-15

摘要: 针对固态硬盘(SSD)的闪存转换层(FTL)策略诸如BAST、FAST增加了垃圾回收的成本,带来了固态硬盘性能的下降等缺点,提出了一种基于页面“写相关”的FTL策略PWRST。PWRST的基本思想是分析I/O请求的访问历史并找出“写相关”的页面,将“写相关”的页面存储到同一数据块。从而减少垃圾回收开销和I/O请求的平均响应时间。实验结果表明PWRST在Postmark和IOzone负载下的响应时间比BAST减少了35%,比FAST减少了26%。在TPC-C负载下的响应时间比BAST减少了12%,比FAST减少了10%。

Abstract: Most existing flash translation layer (FTL) schemes such as block associative sector translation (BAST) and fully associative sector translation (FAST) increase garbage collection overhead and degrade the performance of solid-state drive (SSD). A novel flash translation layer scheme called page write-related sector translation (PWRST) was proposed. PWRST finds write-related pages from request history set and writes these pages into the same data block, which reduces garbage collection overhead and average request response time. Experiment results indicate that PWRST reduces average response time by 35% compared to BAST and 26% compared to FAST for Postmark and IOzone workload. For TPC-C workload, PWRST reduces response time by 12% compared to BAST and 10% compared to FAST.

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