摘要： Prefetching(预取)技术是在计算机体系设计中为提高系统性能而通常采用的一项重要技术。在RAID(廉价冗余磁盘阵列)系统中采用有效的预取技术可以缩短主机读请求的平均响应时间，提高磁盘阵列的数据吞吐率。在分析了一些主要应用模型的数据请求特性的基础上，实现了一种适度贪婪的并行预取算法，实验证明该预取技术对主机的连续大量数据读请求是十分有效的。

关键词: 磁盘阵列, 缓存, 预取, 命中率

Abstract: Prefetching is an important technique to improve the capability in the computer architecture design. Effective prefetching can reduce average response time of read operation and improve the throughput of RAID. The authors analyze some familiar applied models and implement a properly greedy parallel prefetching algorithm. Experimentally, the technique is efficient to retrieve continuous and plentiful data.

中图分类号: 

• TP333