摘要
为了改进文件系统的性能,提出的文件系统既具有自适应的RAID3和RAID5混合结构,又能根据缓存数据在缓冲区的活动性不同而分类缓存,数据被延迟刷新到磁盘来减少、合并写磁盘的次数,进一步采用自适应的文件条带策略来优化文件访问性能。研究结果表明,该文件系统能按需自适应地读写多媒体数据和事务处理数据,当文件系统负载低时,可以尽量积极地将文件分布到所有磁盘来最小化I/O的反馈时间;反之,在系统负载高时,将文件分布的范围小一些以便最大化文件系统整体的吞吐量。
In order to improve performance of file system, an effective adaptive file system （EAFS） is proposed, which has mixed structure of RAID3 and RAID5, and this file system tries to reduce the I/O overhead and improve file write performance by reorganizing data in two buffers according to their activities to reduce and amalgamate the write times; further it adopts an adaptive striping of files across multiple disks to get better I/O performance. Research shows that this file system can fit both transaction applications and multimedia applications adaptively. And when the file system load is low, files are striped aggressively to minimize response time, contrariwise less file is striped aggressively to maximize aggregate throughput.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第10期2597-2598,F0003,共3页
Computer Engineering and Design
