南京邮电大学学报（自然科学版）2011，Vol.31Issue(5)：78-82,5.
一种基于混合模型的数据网格副本选择机制
A Novel Replica Selection Strategy Based on Combination Algorithm in Data Grid
摘要
Abstract
After researching replica selection strategies based on genetic algorithm and ant algorithm and considering their advantages and disadvantages, we propse a new replica selection strategy based on combining algorithms. The fitness function of genetic algorithm is used to determine pheromone distribution in ant algorithm,and then ant algorithm is used to select the best replica,so the new algorithm solves the problem of low efficiency of genetic algorithm and lack of pheromone in the beginning of ant algorithm. Simulation results are displayed graphically. Through analysis and comparison of simulation results,the e-valuation demonstrates that the new algorithm can be effective in reducing the operational running time and improve the speed of replica selection in the whole grid environment and in a single site, so it improves overall performance.关键词
数据网格/副本选择/遗传算法/蚂蚁算法Key words
data grid/replica selection/ant algorithm/genetic algorithm分类
信息技术与安全科学引用本文复制引用
韩志杰,林兆骥,王汝传..一种基于混合模型的数据网格副本选择机制[J].南京邮电大学学报（自然科学版）,2011,31(5):78-82,5.基金项目
国家自然科学基金(60973139,60773041)、国家自然科学基金青年基金(61103195)、中国博士后科学基金(20100480048)、江苏省软件专项、河南省科技攻关项目(072102210044)和中兴科研基金资助项目 （60973139,60773041）
