计算机工程 ›› 2008, Vol. 34 ›› Issue (14): 277-279.doi: 10.3969/j.issn.1000-3428.2008.14.099

• 开发研究与设计技术 • 上一篇    下一篇

异构磁盘阵列DSUraid5数据分布方法

汤 川,李 俊,周 军   

  1. (中国科学技术大学自动化系,合肥 230027)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-07-20 发布日期:2008-07-20

DSUraid5 Data Layout Method for Heterogeneous Disk Array

TANG Chuan, LI Jun, ZHOU Jun   

  1. (Department of Automation, University of Science and Technology of China, Hefei 230027)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-07-20 Published:2008-07-20

摘要: 通过分析以往的异构磁盘阵列数据算法,提出了DSUraid5数据分布方法。根据磁盘性能参数,给磁盘设定不同的条带单元,提出虚拟同构磁阵的概念,解决校验块的计算及分布问题。通过结合动态条带单元和左对称校验单元布局方法,使磁阵中各磁盘达到负载均衡或基本均衡。模拟实验结果表明,与raid5相比,DSUraid5数据分布方法的性能可提升40%,适应于不同场合。

关键词: 异构磁盘阵列, 数据分布, 动态条带单元

Abstract: By analyzing the existed data layout algorithm of heterogeneous disk array, this paper proposes a new method called Dynamic Stripe Unit(DSU) raid level 5. This method assigns the stripe unit size according to the performance parameter of each disk, and resolves the problem of counting and placing parity unit by mirroring the heterogeneous disk array to virtual homogenous disk array. Through combining the dynamic stripe unit and left-symmetric parity distribution, the algorithm makes the load balanced or near balanced. Simulation results show that the algorithm has higher performance than raid5 at most 40%, and is adapt to multiple applications.

Key words: heterogeneous disk array, data layout, Dynamic Stripe Unit(DSU)

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