基于P2P技术的网格资源发现中覆盖网络的构建

文章针对网格环境下的集中式资源发现机制的不足,设计了基于P2P技术的资源发现模型,并在分析典型P2P系统Gnutella覆盖网络构建方式的基础上,提出了网格环境下进行覆盖网络构建的新方式--定序方式.按照定序方式构建的覆盖网络可以保证资源发现的服务质量,同时定序方式以节点间的网络延时作为覆盖网络构建的依据,请求消息按照小的网络延时路径在覆盖网络上传播,从而可以提高资源发现的效率.

The Construction of Overlay Network in Resource Discovery Based on P2P Technology in Grid Environments

This paper proposes a resource discovery model based on P2P technology aimed at the deficieney of the centralized resource discovery mechanism in Grid environment. Through analysis of the way overlay network is constructed in Gnutella system is not suitable in Grid environment, a new method called sorted mode is proposed. The overlay network constructed in sorted way could guarantee the QoS of the resource discovery service, meanwhile the overlay network is constructed according to the network delay between nodes, so the request message could be conveyed along the path with the average least network delay, thus the efficiency could be improved.