基于分布式缓存管理架构的P2P VoD系统

Distributed Cache management based P2P VoD system

针对P2PVoD系统中怎样有效地管理和使用节点所缓存的媒体内容的问题,本文提出了一种基于分布式的缓存管理架构。在这一架构中每个节点存储系相应的媒体分块,所存储的媒体分块可以组合成一个完整的媒体文件的所有节点分布在一个环内。因此在一个环内可以快速定位到这个媒体文件的不同分块,提高了资源搜素的效率。仿真证明这种架构可以有效地管理和使用节点所缓存的媒体内容支持用户的VCR操作。

Aiming at the problem of how to efficiently manage and use peer cache contend in P2P Vod system,a distributed cache management based P2P VoD system is proposed in this article.In the model,peers whose caching media segments integrate a full program are organized into a ring.Any segment of the program can be found quickly within the ring.At last,though the emluator result shows that this system can effectively manage and use peer cache content supporting VCR operations.