计算机应用与软件2013，Vol.30Issue(1)：83-87,5.DOI:10.3969/j.issn.1000-386x.2013.01.019
一种基于认知的动态副本放置方法
A DYNAMIC REPLICA PLACEMENT APPROACH BASED ON COGNITION
摘要
Abstract
Aiming at enormous overhead of data transmission in content distribution networks ( CDN) , a replica placement approach based on cognition is proposed. In which a cognition-based predictive model is built up in regard to content popularity according to the dynamic clients demand information gathered as the feedback from proxy servers. And based on the model the distribution and placement of the contents are heuristically implemented. Simulation results indicate that the approach can noticeably reduce the cost of data transmission in CDN as well as satisfying the dynamic demand of time-varying clients simultaneously. It has the advantages of low latency and low cost. Comparing with normal algorithms, this approach can distinctly improve the cache hit rate and reduce the average latency of clients' requests.关键词
内容分发网/认知/内容流行度/预测模型/副本放置Key words
Content distribution networks/Cognition/Contents popularity/Predictive model/Replica placement分类
信息技术与安全科学引用本文复制引用
韩国栋,朱一戈,张帆..一种基于认知的动态副本放置方法[J].计算机应用与软件,2013,30(1):83-87,5.基金项目
国家高技术研究发展计划项目(2009AA012201). （2009AA012201）
