摘要
为有效降低非结构化P2P网络中副本创建所引起的带宽和存储浪费,减少响应时间,提出了一种基于流行度的层次式副本创建策略PPSR.该策略充分考虑文件的异质性,利用文件流行度辅助副本创建,使得文件副本数量和分布更加合理.充分利用了当前非结构化P2P网络的双层拓扑结构,将超节点层副本创建策略与底层域内副本均衡策略有效结合.仿真结果表明,PPSR在当前非结构化网络中具有比其他流行算法更好的性能.
To reduce bandwidth consumption and storage space, and shorten response time, this paper presented a popularitybased replica creation strategy named PPSR （popularity-based path selective replication） in unstructured P2P network. The heterogeneity of the resources was considered and popularity of resources was used to help the procedure of replica creation, which could make the amount and distribution of the replicas more efficient. Super peer layer replica creation strategy and the bottom layer balancing strategy were integrated into the current two-layer topology of P2P network. The simulation results indicate that PPSR has better performance compared with other popular strategies.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2007年第4期51-55,共5页
Journal of Dalian Maritime University
基金
国家自然科学基金资助项目(60703053)
关键词
非结构化P2P网络
流行度
复制
副本创建
unstructured peer-to-peer network
popularity
replication
replica creation
