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一类DHT算法中负载的概率分布 被引量:3

Probabilistic distribution of load in one class of DHT
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摘要 根据节点之间间距的概率,推导出Chord、Pastry和虚拟服务器(VS)平衡方案下节点负载的概率分布。分析表明在这些分布式哈希表(DHT)算法中,节点负载都服从相同形式的伽马分布。特别地,当一个物理节点上放置20个虚拟节点,以概率0.99保证节点之间的负载差异不超过两倍。仿真实验验证了以上结果。 Accord.ing to the probability of intervals between nodes, the paper deduced the distribution of load in Chord, Pastry and virtual servers (VS) balancing scheme. The analysis showed that in these algorithms the load of nodes obeyed the Gamma distribution with similar parameters. Particularly, when put 20 virtual nodes on a physical node, it could he guaranteed with the probability 0.99 that the difference of load between two nodes will not exceed two times. And the simulation verifies the results.
出处 《计算机应用研究》 CSCD 北大核心 2009年第10期3763-3766,共4页 Application Research of Computers
关键词 分布式哈希表 负载均衡 概率密度函数 累积分布函数 distributed hash table (DHT) load balance probability density function (PDF) cumulative distribution function (CDF)
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参考文献8

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同被引文献23

  • 1聂晓文,卢显良,周旭,李梁,徐海湄.DHT算法基本统计特性及其应用[J].四川大学学报(工程科学版),2009,41(5):170-175. 被引量:2
  • 2刘田甜,李超,胡庆成,张桂刚.云环境下多副本管理综述[J].计算机研究与发展,2011,48(S3):254-260. 被引量:20
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  • 6DRUSCHEL P,ROWSTRON A. PAST:a large-scale,persistent peer-to-peer storage utility[A].Schoss Elmau,2001.75-80.
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