【摘要】 S-RAID 5是一种适于顺序数据访问的节能磁盘阵列,为了提高其性能并保持节能效率,提出一种能量管理算法:逻辑空间预测法(LSF),该算法对S-RAID 5的I/O请求地址进行动态聚类分析,以获得I/O请求在逻辑地址空间内的分布区,然后求出各分布区的动态特性,并结合S-RAID 5的特殊数据布局,预测磁盘的工作状态并根据预测状态调度磁盘.实验表明,在节能效果相当的情况下,与典型算法TPM、Markov相比,LSF可有效消除SRAID 5的响应时间延迟.更多还原

【Abstract】 S-RAID 5is an energy-efficient RAID for sequential data access,an energy management algorithm,logical space forecast(LSF)algorithm,for S-RAID 5was proposed to improve the performance of S-RAID 5while maintains its energy efficiency.LSF performed dynamical cluster analysis on the addresses of the I/O requests,and obtained the areas of I/Os distributed in the logical address space.According the dynamic characteristics of above areas and special data layout of S-RAID 5,LSF forecasted the states of the disks in S-RAID 5,and scheduled the disks based on the predicted states.Experimental result shows that compared with classical algorithms TPM and Markov,LSF can effectively eliminate the response time delay of S-RAID 5 while gains similar energy saving.更多还原