摘要
针对P2P视频点播系统的扩展性问题,从媒体源服务器、索引服务器两方面考虑,提出一种混合式拓扑结构的P2P VOD系统的设计模型。在mesh结构系统普遍采用的gossip拓扑层之上构建一层有结构的P2P网络拓扑,使得DHT可以用于拖动操作后的合作节点定位,以有效减轻索引服务器的压力。在该混合式拓扑的基础上进行多服务节点数据调度算法的设计,能很好地适应网络的异构性与节点的动态性,并有效降低媒体源服务器的负载,同时满足系统扩展性与视频服务质量的需求。
A hybrid topology architecture is presented to solve the problem of scalability in P2P VOD system. Based on the gossip topology of mesh-based system, this paper constructs a structured topology and provides a distributed collaborated nodes searching mechanism for dragging operation. Besides, the model designs an algorithm for data scheduling from multiple service nodes, which properly fits the heterogeneous and dynamic network environment, and also achieves good system scalability and high service quality.
出处
《计算机系统应用》
2010年第2期11-15,56,共6页
Computer Systems & Applications
关键词
视频点播
对等网络
混合拓扑
合作节点定位
多数据源调度
video-on-demand
peer-to-peer network
hybrid topology
collaborated nodes locating
multi-source datascheduhng
