双容错磁盘阵列校验散布布局的优化  

Dual fault-tolerant disk arrays to optimize the layout of check spread

作　　者：张燕[1] 胡英坚[1] 徐惠斌[1] 

机构地区：[1]空军航空大学长春,长春130022

出　　处：《电脑编程技巧与维护》2009年第S1期184-186,共3页Computer Programming Skills & Maintenance

摘　　要：采用模拟退火算法,对双容错磁盘阵列RAID6的数据布局进行校验散布优化,并且根据理想数据布局最主要的标准"重构负载均匀分布",以及对性能影响也较大的标准"校验负载均匀分布",对这种校验散布算法进行了验证,最后通过仿真实验,测试它的性能,并做出分析,结果显示该方法使RAID6在降级模式和重构模式下的负载得以均匀分布,从而使它的性能得以提高。RAID exhibit very poor performance in the presence of a disk failure. The'Parity Declustering' techniques for distributing the workload induced by a disk failure across a large set of disks, thereby reducing the impact of the failure recovery process on the system as a whole.The improvements in performance during failure recovery can be obtained through the careful design of the algorithms used to recover lost data from redundant information.

关 键 词：数据布局 校验散布 模拟退火优化算法 双容错编码 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]