关键词: 大规模存储系统, 文件布局策略, 静态布局, 负载均衡, 平均响应时间

Abstract:

Proposed in this paper is a static file layout strategy (SFLS) in improving the access performance oflarge-scale storage systems. In SFLS, first, the disk is divided into two groups that are respectively used to store hotfiles and large files. Then, the files sorted according to the service time are assigned to the two groups of disks inthe ways of Round-robin or Greedy. The disk group that should be accessed is selected according to the size andheat of files, which speeds up the I/ O access of files and improves the access performance of the storage system.Experimental results show that SFLS dynamically adapts to the increase of system scale, costs less response timeand possesses better load balancing performance, as compared with the static layout strategies SP and SOR and withthe dynamic layout strategy HP.

Key words: large-scale storage system, file layout strategy, static layout, load balancing, mean response time