摘要
Cache技术是一种能够减少时延,节省带宽和降低服务器负载的有效方法。文章分析了现有证书服务器中Cache算法和证书系统的结构特性;指出证书缓存的简单替换算法:FIFO(first in first out)和LRU(Least RecentlyUsed),无法提供较高的Cache命中率。文中提出了一种智能预留控制缓存替换算法,理论分析和仿真数据表明该算法能大大减少访问证书的时间,改善证书管理效率,并有效提高缓存的命中率。
Cache technology is one of the effective ways to reduce time delay .save bandwidth and lower server's load. In this paper, we analyze the characteristics of certificate system, and the Cache algorithms in current certificate servers. Current simple Cache replacement algorithms,such as FIFO (first in first out)and LRU (Least Recently Used) are not suitable for parallel scientific application because of their low hit ratio. We propose a new intellectualized Cache replacement algorithm. The theory analysis and simulation results show that the new algorithm for cache replacement not only reduces the time of processing certificates,but also improves efficiency of certificate management obviously and higher the hit ratio.
出处
《计算机科学》
CSCD
北大核心
2004年第2期89-92,共4页
Computer Science
基金
国家863宽带VPN项目863-104-03-01
