基于Web Service的区域式P2P系统模型研究

P2P(Peer-to-Peer)系统的模型目前来说基本上分为纯分散式结构和服务器辅助式结构，这两种结构各有其优缺点。文中基于简单的模拟现实社会结构的思想和P2P系统需求的特殊性，结合Web Service的技术优势，提出了一种基于HTTP和XML的区域式P2P系统模型并详细描述了系统运作的细节。该模型将资源搜索和文件传输统一在Web Service上实现，并充分利用了分散于各节点上的计算能力，克服了纯分散式结构管理困难和难于发现其它节点的缺点以及服务器辅助式结构容易产生服务器瓶颈和服务器失效时系统瘫痪的缺点。

Research of a Web Service-based Regional P2P System Model

Basically,there exist two types of P2P system model today,Purely Decentralized Model and Server-Assisting Model. Each model has its own advantages and drawbacks. In this paper,a HTTP and XML based regional P2P system model is proposed based on the Web Service technology and the simple idea of real world simulation. Details of the working of the whole system are also described. In this P2P system model,resource searching and file transportation are integrated and implemented with Web Service,while computing capability distributed in all the system nodes are also fully utilized. As a result,main problems in the Purely Decentralized Model,that is,the lack of management and the difficulty of finding other nodes,are solved soundly. Meanwhile,the bottleneck of index server and the paralysis of the system caused by server failure are also conquered.