摘要
针对P2P视频点播系统存在的可扩展性和可靠性差等问题,设计了一种新的基于P2P(PEER-TO-PEER)的VOD系统.该系统考虑了节点均衡负载对系统整体性能的影响,采用了服务器集中调度与节点分布协调管理相结合的资源定位方式,应用灵活的候选父节点策略使节点失效后能进行快速的失效恢复.模拟实验表明,该系统可扩展性和可靠性较好,可以在一定程度上提高视频点播系统的服务质量.
Video-on-demand （VOD） is a user-demand driven video system. The key to the large-scale ap- plication of VOD system is dependent on how to improve the expansibility and reliability in the dynamic environment. A new P2P （peer-to-peer）-based VOD system is presented in this paper, which takes into consideration the influence of node balanced load on overall performance, adopts the resources location mode of combining server scheduling with coordination management for node distribution, and employs flexible strategies of the candidate father nodes to ensure a quick failure recovery after the node invalidation. The simulation experiments show that the proposed system is of good expansibility and reliability, and improves VOD service quality to some degree.
出处
《重庆工学院学报（自然科学版）》
2009年第3期144-149,共6页
Journal of Chongqing Institute of Technology
基金
国家"863"高技术研究发展计划资助项目(2007AA01Z445)
关键词
P2P
视频点播
均衡负载
资源定位
失效恢复
P2P
Viedo-on-Demand
balanced load
resources location
failure recovery
