P2P文件共享技术是近年来用以解决海量信息存储、在异常情况下进行灾难恢复等方面的问题的一种方案。它通过网络上各个结点的即时通讯,组建动态的网络来使用户间相互共享资源,从而使网络资源分布较为均匀,并减少了用户对于特定结点的依赖。本文通过比较和性能的分析说明了为何选择gnutella协议和genucleus软件作为本文实现P2P文件共享服务这一技术。 P2P file sharing technology in recent years to solve the massive information storage, disaster recovery in anomalies and other aspects of a program. It real-time communication through the various nodes on the network, the formation of a dynamic network to enable users to share resources with each other, so that the distribution of network resources more evenly, and reduce the user’s dependence on a specific node. This article shows through comparison and performance analysis why gnutella protocol and genucleus software are selected as the P2P file sharing service in this paper.