对等网络Chord分布式查找服务的研究

Study on the Distributed Lookup Service of P2P Systems with Chord

在大规模Internet网络的应用中,查找服务是对等网络系统所面临的核心问题。Chord提供了一种高效和稳定的查找服务,Chord的可扩展性特点适用于大规模对等网络系统。在节点退出或加入时,Chord提供了高效稳定的机制。基于Chord的文件共享系统(SFS)是一个用于对等网络的只读存贮系统,它可以提供高效率的、鲁棒的和负载平衡的文件存取功能。SFS采用了完全分布式体系结构(没有服务器),很容易地扩展到大规模网络。SFS核心分为二层:DHT层和Chord层,使用Chord算法来定位查找服务。

The core problem facing P2P systems is just the lookup service of P2P systems with Chord in a largescale Internet network. k. Chord provides a service that gives an efficient and robust implementation of a lookup service, and its scalability makes it practical for use in large P2P systems. It is very robust in the face of node failures as well as in the face of many simultaneous node failures. Also, chord provides an efficient mechanism to accommodate simultaneous nodes joins. The Shared File System (SFS) based on Chord is a P2P readonly storage system that providesproviding guarantees for the efficiency, robustness, and loadbalance of file storage and, retrieval. SFS does this with a completely decentralized architecture that can reach a large scale of systems. The core of the SFS software consists of two layers, i.e., DHT and Chord. SFS uses the Chord to locate the lookup service.