P2p Network Resources Such As Search Positioning Mechanism

Peer-to-Peer network is a new type of network which different from the traditional modes of C/S. P2P network structure is divided into distributed P2P systems and undistributed P2P systems. The search and location of the data in undistributed P2P systems is implemented by flooding, almost at random. It can easily lead to a dramatic increase in network traffic, resulting in network congestion. The distributed P2P systems based on DHT resolve the search and location problem, but still have many other problems. Such as: the balance between efficiency and state, fault-tolerance, routing hotspot, geography isomerism and mainframe capacity isomerism. Therefore, how to gain useful information effectively is one of the sticking points whether the system can be applied in large-scale. It has important theory and application value to the research of search localization mechanism in P2P systems.At first, for the network congestion problem caused by random search in P2P network, this paper proposes a resource search strategy "Feedback Search" which based on the algorithm of Random walks, including inquiries transmitted strategy based on feedback and flooding control algorithm. The inquiries transmitted strategy based on feedback has been implemented by using the feedback information of the executed inquires; The flooding control algorithm carries on to the search strategy further optimizes, using the news number, TTL and TS at the same time to control the inquiry news, reduce the news number which the search produces and cause the network band width not to be consumed excessively, reduce the network jam. For the rooting hotspot problem in distributed P2P systems, this paper proposes a method to solve it, including the duplication selection strategy that based on iterative and theduplicate-using strategy------ a redirection algorithm. The experimentuses the Java language to simulation the entire strategy. The experimental result indicated this method is effective, reliable, and is worth to promote in the current P2P network.