摘要
由于P2P文件共享系统具有自组织的特点,其行为特性很大程度上影响了系统可靠性和性能。为了解这种性质,利用统计方法研究了Maze系统用户行为特性分布模型及特点。结论表明,用户上传流量和下载流量、上传带宽和下载带宽可以使用对数正态混合分布来描述,活跃时间和传输时间可以使用对数正态分布来拟合,而请求次数和被请求次数可以使用指数分布和Pareto分布的混合分布来表达。
Due to the properties of self-organization,behavior characteristics affect the reliability and performance in P2P file-sharing system significantly.In order to understand this nature,this paper investigated properties and distribution model of users' behavior characteristics in MAZE system through statistical methods.And the results indicate that upload and download traffic,upload and download bandwidth of users' can be modeled by lognormal mixture distribution;active time and transmission time of users' can be fitted using the lognormal distribution;while the number of requests and the requested number of users' are modeled by the mixed exponential distribution and Pareto distribution.
出处
《计算机应用研究》
CSCD
北大核心
2012年第5期1842-1845,共4页
Application Research of Computers
基金
国家"973"计划资助项目(2003CB314805
2009CB320505)