摘要
针对分布式媒体服务系统中的副本放置问题,从优化节点间的传输代价出发,提出一种基于全局信息的启发式副本放置算法——Zero2min,与现有算法相比,节省传输代价10%～36%。根据Zero2min算法的思路,给出媒体内容逐渐增加情况下的一种动态放置方法,仿真结果表明,其代价小于Max2min。
Aiming at the problem of replica placement in a distributed media system to reduce the cost of transferring data among nodes,this paper proposes an heuristic replica placement algorithm——Zero2min based on global information,compared with common algorithm,its cost is reduced by 10%～36%. It further proposes a method to place the media data when the data is imported into the system. Simulation results show that its cost is less than Max2min.
出处
《计算机工程》
CAS
CSCD
北大核心
2010年第2期9-12,共4页
Computer Engineering
基金
国家"863"计划基金资助项目(2008AA01Z147
2008AA01A317)
中国科学院知识创新工程青年人才领域前沿基金资助项目
关键词
副本放置
分布式媒体系统
启发式算法
replica placement
distributed media system
heuristic algorithm
