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部署于云服务传递网络(Cloud Service Delivery Network,CSDN)基础设施的P2P VoD系统,在每个CSDN节点内将同一节目的所有用户构建成P2P覆盖网,但CSDN单节点内大量节目的并发用户稀少.因此,如何在兼顾流量本地化的前提下,解决CSDN架构下P2P VoD覆盖网构造中Peer资源稀疏问题是当前面临的一个挑战.为此,提出一种P2P覆盖网的弹性构造方法ECM(Elastic Construction Method).ECM依据资源索引来弹性扩展P2P覆盖网的构造范围,有效解决Peer资源稀疏问题;同时根据CSDN节点间距离来选择扩展路径,实现P2P流量本地化.最后模拟实验结果表明,ECM能有效均衡服务器负载和跨ISP流量.
The P2P VoD system deployed in Cloud Service Delivery Network (CSDN) infrastructure builds all users of the same program into a P2P overlay network in each CSDN node, but there are few concurrent users of a large number of programs in a single node of CSDN Therefore, how to solve the problem of Peer resource sparseness in the construction of P2P VoD overlay network under the CSDN architecture is a challenge that how to solve the problem of how to consider the localization of traffic.Therefore, a flexible construction method of P2P overlay network (ECM) Construction Method) .ECM flexibly expands the construction scope of P2P overlay network according to the resource index, effectively solves the problem of Peer resource sparseness, and selects the extended path according to the distance between CSDN nodes to localize the P2P traffic.Finally the simulation results show that ECM Effectively balance server load and cross ISP traffic.