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大规模对等网络点播服务中主要的挑战之一为服务性能及可靠性保障.提出一种基于多级P2P架构的VOD(视频点播)系统,克服了传统的集中式P2P结构和纯P2P结构的缺点,综合了二者的优点.文中给出系统中主要的分布式节点的设计与实现方法,在后续的实验床上的验证结果表明,各主要分布式节点实现了预期的功能,多级P2P架构具有一定的先进性,较大地增强了系统的服务性能及稳定性和可靠性,有效地拓展了系统的带宽.
One of the main challenges in large-scale peer-to-peer (P2P) on-demand service is the guarantee of service performance and reliability.A VOD (Video On Demand) system based on multi-level P2P architecture is proposed to overcome the disadvantages of the traditional centralized P2P architecture and pure P2P architecture Shortcomings and the advantages of the two are summarized.The design and implementation methods of the main distributed nodes in the system are given in the paper.The verification results in the subsequent experimental beds show that the main distributed nodes realize the expected functions and the multi-level P2P architecture Has a certain degree of advanced nature, greatly enhance the system’s service performance and stability and reliability, effectively expanding the system bandwidth.