面向大规模存储系统的静态文件布局策略  

Static File Layout Strategy for Large-Scale Storage System

作　　者：龙赛琴[1] 赵跃龙[1] 谢晓玲[1] 陈伟[1] 曾文英[1,2] 

机构地区：[1]华南理工大学计算机科学与工程学院,广东广州510006 [2]广东科学技术职业学院计算机工程技术学院,广东珠海519090

出　　处：《华南理工大学学报（自然科学版）》2013年第1期70-76,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省科技计划项目(2010B060100056);广州市科技计划项目(2010Y0-C681)

摘　　要：为了提高大规模存储系统的访问性能,提出了一种静态文件布局策略(SFLS).SFLS首先把磁盘分成两组,分别用于存放热点文件和大文件,然后按服务时间长短将排序好的文件分别以Round-robin和Greedy的方式存放到两组磁盘上;在进行文件访问时,可根据文件的大小和热度来选择相应的磁盘组进行访问.该策略加快了文件I/O请求的访问速度,提高了存储系统的访问性能.实验结果表明,SFLS能动态适应系统规模的增长,与SP、SOR静态布局策略和HP动态布局策略相比,具有更低的平均响应时间和更好的负载均衡性能.Proposed in this paper is a static file layout strategy （SFLS） in improving the access performance of large-scale storage systems. In SFLS, first, the disk is divided into two groups that are respectively used to store hot flies and large files. Then, the flies sorted according to the service time are assigned to the two groups of disks in the ways of Round-robin or Greedy. The disk group that should be accessed is selected according to the size and heat 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 time and possesses better load balancing performance, as compared with the static layout strategies SP and SOR and with the dynamic layout strategy HP.

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 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]