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P2P网络节点随机行为对文件规模的影响 被引量：1

Impact of peers' stochastic behaviors on file population in peer-to-peer network
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摘要 基于随机过程理论建立文件共享P2P网络模型,利用该模型系统地分析节点下载、合作、欺骗以及加入/退出等多种动态行为对文件规模及相关的平均负载率、下载成功率、平均下载次数等性能的影响.得出文件规模对下载率和退出率较敏感,存在平稳极限分布;合作率显著影响平均负载率,而欺骗率严重影响下载成功率及平均下载次数.以上结论可作为相应系统调控机制的优化目标及评价参考.该模型为进一步研究P2P系统性能提供一种简单有效的理论方法. A stochastic model of file sharing P2P （peer-to-peer） network is established. Based on the model, the impact of peers＇ dynamic behaviors （ download, cooperation, cheating, joining and departing） on file population and other relative system performances are systematically analyzed. It is concluded that file population is sensitive to download rate and departing ratio but has a balanced limit distribution. In addition, cooperation ratio remarkably influences mean load ratio while cheating ratio has distinct impact on success download probability and mean download times. These conclusions can be used to guide and evaluate optimizing system management mechanism. The truth that results of experiment coincide with theoretical results proves that the stochastic model is simple and effective.
作者 方群 吉逸 吴国新
机构地区 东南大学计算机科学与工程学院
出处 《东南大学学报（自然科学版）》 EI CAS CSCD 北大核心 2007年第5期782-786,共5页 Journal of Southeast University：Natural Science Edition
基金 安徽省高校青年基金资助项目(2007jq1061)
关键词 P2P 文件共享 动态行为 生灭过程 peer-to-peer file sharing dynamic behavior birth-death process
分类号 TP393.0 [自动化与计算机技术—计算机应用技术]
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参考文献8

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共引文献4

同被引文献7

  • 1刘琼,徐鹏,杨海涛,彭芸.Peer-to-Peer文件共享系统的测量研究[J].软件学报,2006,17(10):2131-2140. 被引量：36
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东南大学学报（自然科学版）
2007年 第5期

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