异构磁盘阵列DSUraid5数据分布方法  

DSUraid5 Data Layout Method for Heterogeneous Disk Array

作　　者：汤川[1] 李俊[1] 周军[1] 

机构地区：[1]中国科学技术大学自动化系,合肥230027

出　　处：《计算机工程》2008年第14期277-279,共3页Computer Engineering

基　　金：国家"863"计划基金资助项目(2006AA01Z114)

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。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.

关 键 词：异构磁盘阵列 数据分布 动态条带单元 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]