基于混合层次化P2P 网络的文件共享系统  

A File Sharing System Based on Hybrid Hierarchical P2P Net work

作　　者：史旭宁 姜楠[2] Shi Xuning;Jiang Nan(Tongchuan Vocational and Technical College,Tongchuan Shaanxi 727031,China;Xi'an Jiaotong University,Xi'an Shaanxi 710049,China)

机构地区：[1]铜川职业技术学院,陕西铜川727031 [2]西安交通大学,陕西西安710049

出　　处：《信息与电脑》2020年第21期158-161,共4页Information & Computer

摘　　要：目前流行的分布式网络文件共享系统大部分都是基于非结构化P2P(Peer-to-peer)拓扑,这种拓扑利用洪泛方法传播查询信息,具有较好的稳定性,但是效率很低。基于DHT方法的结构化P2P拓扑具有查询效率高、扩展性好的特点,但是由于其在结点频繁加入退出的情况下容易形成网络动荡,稳定性较差,因此不适合实际系统使用。本文提出了网络文件共享系统Kapa,它建立在一种混合层次化P2P拓扑结构之上,这种结构结合了非结构化和结构化P2P拓扑的优点,具有很强的实用性。通过实验证明,Kapa具有较高的查询效率、可扩展性和相对较好的稳定性。The existing peer-to-peer file sharing systems are mainly based on unstructured P2P networks using flooding method for lookup that is good at stability but poor in efficiency.DHT(Distributed Hash Table)method has been proposed to improve system efficiency but because it is frail when nodes frequently join or leave,DHT method has less practicability in actual systems.In this paper,we present Kapa,a new file sharing system based on a hybrid hierarchical P2P which is a two-layer hybrid network that combines the strongpoint of DHT and flooding methods to improve the performance of whole system.By simulation experiments,we conclude that Kapa is good at scalability,efficiency,and stab ility.

关 键 词：文件共享 P2P拓扑 混合层次化拓扑 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]