一种高性能多媒体对象存储系统的研究  

Research on the High Performance Multimedia Object Storage System

作　　者：詹玲[1] 章丽玲[1] 万继光[2] 

机构地区：[1]湖北第二师范学院计算机学院,湖北武汉430205 [2]华中科技大学计算机学院,武汉光电国家实验室,湖北武汉430074

出　　处：《小型微型计算机系统》2011年第3期460-463,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金重点项目(60933002)资助;国家“八六三”高技术研究发展计划重大项目(2009AA01A402)资助

摘　　要：通过对多媒体应用中多用户并发访问的特点和性能进行分析,提出一种高性能多媒体对象存储系统MOSS(Multime-dia Object Storage System)的对象数据组织结构.MOSS结构采用两层结构,下层采用RAID5的方式组织数据,这样可以利用RAID5磁盘利用率高的优势.上层放常用的热点数据,通过将不同对象存放在不同磁盘,从而将不同用户的请求尽量分散到不同的磁盘上,可以提高多用户的并发访问性能.通过仿真测试,在4用户情况下,MOSS的性能平均比RAID高90%,随着用户数的增加,传统RAID方式的性能下降明显,而MOSS的性能下降很少,在16用户情况下,MOSS的性能平均比RAID高550%.This paper analyzes multi-users concurrent access patterns and performance of multimedia applications, explores the higherperformance architecture of data organization in multimedia object storage System （MOSS）. MOSS, adopted two-level arehitecture, is to use the upper layer with the RAID5 data organization for making use of high disk utilization and the under layer, referred to as hot data disk. The hot data disk, as a secondary storage area to optimize the performance of multi-users concurrent access, puts different objects into corresponding disks in order to distribute various requests largely. Under the four users＇ request environment, the MOSS shows 90% higher performance as compared to existing RAID system through simulates test system. As we known, the performance of existing RAID system drops obviously according by the increasing users and continuous requests scheduling. MOSS gets larger speedup and 550% higher performance than sixteen users＇ circumstances.

关 键 词：高性能 多媒体 对象存储系统 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]