P2p File-sharing Network Model And Application

File share system is one of the most important P2P application field, most of the existing P2P file-sharing systems is low efficient in searching for resource and can consume a large amount of bandwidth, So the research and development of a user-oriented and efficient file sharing system may make internet recourse share to the biggest extent and is very important for resource sharing and information communication.This paper combines distributed characteristics of P2P network system with application needs of file sharing service and has fully studied some key technology of network topology and information searching. This paper first analyzes the advantages and disadvantages of the existing unstructured and structural models and briefly describes relevant work;Then, a node clustering-based information retrieval modelon p2p system-NC Search has been proposesd. By preserving contentlocality(semantic heterogeneity characteristic ) of peers, NC Search greatly improves search efficiency;Futhermore, a heterogeneity-basedP2P file sharing network model-HBP2P has been proposesd. Bytaking account of all kinds of heterogeneity characteristic such as semantic heterogeneity,geographic localiy heterogeneity,capability heterogeneity,HBP2P classifies peers by multiple heterogeneity to improve search efficiency;Lastly,based on the HBP2P network model,this paper designs a P2P file sharing platform prototype system.The experimental simulation results indicated that compared to the traditional P2P model, NCSearch and HBP2P improve search efficiency and have certain value in file sharing and distributed file storage applicational domain.