非结构化P2P网络中基于流行度的层次式副本创建策略

• 作 者: 关志涛 曹元大 侯祥松 张常有
• 机 构: 北京理工大学计算机科学技术学院,北京理工大学计算机科学技术学院,北京理工大学计算机科学技术学院,北京理工大学计算机科学技术学院 北京100081,北京100081,北京100081,北京100081
• 出 处: 大连海事大学学报
• 发表日期: 2007年04期
• 关键词: 非结构化P2P网络 流行度 复制 副本创建

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.

In order to effectively reduce the bandwidth and storage waste caused by duplicate creation in unstructured P2P network and reduce the response time, a level-based copy creation strategy PPSR based on popularity is proposed.This strategy takes full account of the heterogeneity of the file, The creation of popular auxiliary copies makes the number and distribution of file copies more reasonable.This paper makes full use of the double-layer topology of current unstructured P2P networks and effectively combines the creation strategy of super-node layer replicas with the underlying intra-domain copy balance strategy.The simulation results show that, PPSR has better performance than other popular algorithms in current unstructured networks.