摘要
提出了一种基于访问频率的副本创建策略。该策略主要依据网格用户对文件副本的访问频率进行副本创建,在替换副本时也依据频率值,将不经常访问的副本删除。这种策略能够很好地满足用户访问所需副本的要求,并能提高副本的传输速率与带宽的利用率。文章根据网格结构的特点和算法的环境要求对网格模拟器OptorSim的模块进行了改进,并对该算法进行了测试。测试结果表明,基于访问频率的副本创建算法提高了用户访问副本的效率。
We present a replication strategy based on access frequency.The strategy mainly depends on the frequency of grid user accessing file to create replication,and deletes the least accessed files according to the frequency value when replacing replications.The strategy can greatly satisfy users＇ demand to access the replications they need,and improve replication transmission rate and bandwidth utilization ratio.According to the characteristics of grid structure and the environmental requirements of algorithm,we improve the modules of grid simulator OptorSim and test the algorithm.The test result shows that the replication strategy based on access frequency enhances the efficiency of users accessing replications.
出处
《计算机时代》
2011年第6期20-22,25,共4页
Computer Era
关键词
数据网格
副本
访问频率
网格模拟器
data grid
replication
access frequency
grid simulator
