P2P网络中基于激励机制的副本策略  

Replication strategy based on incentive mechanism in peer-to-peer networks

作　　者：郭良敏[1,2] 杨寿保[1] 路卫娜[1] 张瑞[1] 武斌 

机构地区：[1]中国科学技术大学计算机科学与技术学院,安徽合肥230027 [2]安徽师范大学计算机科学与技术系,安徽芜湖241003

出　　处：《中国科学技术大学学报》2010年第10期1087-1095,共9页JUSTC

基　　金：国家自然科学基金(60673172);中国高技术研究发展(863)计划(2006AA01A110)资助

摘　　要：为了在P2P网络的副本技术应用中调动节点主动提供存储空间的积极性、增强节点间的相互合作,借鉴信息经济学中委托-代理关系的相关知识以及激励的概念,提出基于激励机制的副本策略,从而提高P2P网络的性能.模拟实验表明,所提出的基于激励机制的副本策略可以削弱由于节点间的不合作所引起的不能成功创建文件副本的影响,可以在一定程度上提高网络的搜索性能.与目前几种经典的副本策略相比,所提出的策略降低了网络的搜索响应时间,提升了搜索的成功率,并使得节点的负载相对达到均衡.To encourage peers in P2Pnetwork to provide their storage space saving replications and strengthen cooperation between them,the replication strategy based on incentive mechanism was put forward using information economics about principal-agent relationship and the incentive concept for reference.The experimental results show that the proposed replication strategy can weaken the negative effect brought about by noncooperation between peers as far as possible to create replications successfully,and indeed improve search performance of P2Pnetworks to a certain extent.Compared with classical replication strategies,the new method can reduce search response time,promote search success ratio and balance peers＇load.

关 键 词：副本 激励机制 委托节点 代理节点 P2P网络 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]