P2p Technology Mainstream Model Of Network Resources Search Mechanism

With the increasing popularization of Internet and the increasing resource sharing requirements of network users, P2P network technology becomes one of the major technologies that can change the existing Internet application pattern. P2P network is dynamic, scalable and self-organized. Therefore, how to locate resource is the key problem to be handled in P2P study. The paper thesis discusses two types of mainstream P2P network models, and also proposes and improves their resource location schemes.Aiming at the defects of Gnutella network, namely forming large redundant information in progress of network search by using flooding algorithm, this paper, based on the concept of Small-World, firstly suggests two kinds of improvement mechanisms: one is the improved diffusion routing algorithm, the other is the multicast query mechanism according to the geography position. These two improvement mechanisms can effectively reduce redundant information so as to improve the efficiency of resource location. Then, in Chord network, considering the low efficiency of search due to large redundancy information existing in Finger List of Chord algorithm, an improved scheme is proposed: on one hand, one can build a routing table, then scan again, delete the redundancy information before marking it and add anti-clockwise new neighboring nodes which number is P to help increase valid information of the routing table and improve query efficiency; on the other hand, based on the physical position apart, reducing delay algorithm is introduced. After analyzing the merits and demerits of the above network models, the thesis proposes a kind of resource location model of super peer-to-peer network and also describes this model's realization modes and important progress in details. Accordingly, a manager protocol and new key matching algorithm are also proposed to enhance the network's management and practicability.