一种动态负载均衡的P2P应用层组播方案

A Dynamic Load Balancing P2P Application Layer Multicast Scheme

基于结构化的P2P基础设施,给出一种动态负载均衡的应用层组播方案——DLBMS。利用Tapestry协议的路由和定位机制,设计了延迟优化的组播转发树结构,采用根节点复制的方法生成多棵不相交的组播转发树,根据负载的变化动态调节组播转发树数目以实现负载均衡和降低源到组成员节点的端到端延迟。通过模拟实验说明了此方案在平均控制负载和端到端平均延迟方面的有效性。

This paper presents DLBMS, a scalable and dynamic load balancing application layer multicast scheme built on structured P2P substrate. DLBMS utilizes Tapestry＇s routing and data location service to create delay optimized multicast delivery tree, optimizes the end-to-end delay between source and group members and achieves load balancing by splitting the DLBMS multicast delivery tree into a set of disjoint multicast delivery trees and adjusting the number of multicast delivery trees dynamically according to the change of load. We compare DLBMS and Bayeux by simulation, and the results show that DLBMS has the obvious advantage in terms of end-to-end delay and load balancing.