Hybrid P2p System Design And Search Mechanism

Lately,the network is used all over our daily life,and become absolutely necessarily.With the application of the network,the network technology becomes more and more advanced.And Peer-to-Peer(P2P) technology is a popular reaching point in the international IT area.The original theory of design the network is implemented,the peers can communicated with each other directly,without the help of the server.Peer-to-Peer(P2P) is called the one of the forth technology in the change of the network's further.Peer-to-Peer(P2P) is focus on how to use the plenty of resources with high efficiency in the Internet,and share the enormous resources adequately.The innovation of this thesis is combine the characteristics of structured and unstructured P2P network,as well as the advantage and disadvantages in the search area.Design the hybrid P2P system.The system is composed of two parts,the one is the structured P2P network,and the other is unstructured P2P network.The nodes in the network are divided into many groups in accordance with certain rules.Select the node with the best performance as a superpeer in every group,the nodes in the group followed the unstructured P2P network topology;the superpeer of each group connect each other,and form the structured P2P network topology,the graph of the structured topology use De Brujin graph.Because of the user interested in one or two subjects and tried to search for it when they access the Internet.Then we introduced the search based on the user's interests.After the node in network divided into many groups according the interests,the search is more convenient.So we adopt the interest group in the hybrid system.The significance of the search is located in accordance with the development of content. You can specify the node,the exact name of data objects,and can also be like Baidu,only designated a few words—this is so-called "blind search".The advantage of structured P2P network is accurate search,but blind search is more complicate than locate,this is the disadvantage of structured P2P network,because of its' structure is too strict,distributed hash table mapping data objects will be none of disciplinarian.However,unstructured P2P network is support the blind search well,because of the restrictions of the TTL,there exists a problem in unstructured P2P network,the resources are in the system,but can not find.According to the advantage and disadvantages in the structured and unstructured P2P network,this paper design the blind search in the structured P2P network——Recursive Parallelism Search,RPS.This thesis mainly studies are the design of hybrid P2P system and the search,and is divided into six chapters.In the first chapter we illuminate background of our study and put forward of the problems, the work we do in the paper and the structure of the paper.The second chapter designs the hybrid P2P system.The third chapter is the search based on the user's interests.In the forth chapter,the blind search in the structured P2P network.In the fifth chapter,the simulation.And the last chapter mainly presents the following problems for future research.