Peer Analysis Of A Number Of Key Technologies In The Platform

According to the statistic collected in recent years, P2P (peer-to-peer), which is the most predominant application of internet family, carries over 60% internet traffic. So P2P has become one of the hottest issues in information technology domain recently. However, the features of P2P network, strong dynamic, large-scale and plenty of P2P protocols, require novel tools to research it. The Platform for Analyzing Performance of P2P(P2P-PA) proposed by this paper provides two ways to analyze the performance of P2P: simulating and collecting the information form real P2P network. On one side, P2P-PAP can simulate the P2P network dynamic and surveille the states of P2P simulation. On the other side, it realizes low cost, large-scale to collect the information form real P2P network.At first, this paper surveys the related technology of analyzing P2P, describes the related concept of analyzing P2P system and the key techniques to resolve. Based on the above work, the main contribution of this paper is proposing the technology of constructing dynamic simulation network, the Algorithm for fast computer network diameter and the technology of compatibility with real P2P network.The technology of constructing dynamic simulation network, provides diversity ways to change the states of nodes and the value of edges'attribute. For changing states of nodes, the technology of changing nodes states triggered by system can change well and truly; the technology of changing nodes states triggered by user can change flexibly. The technology of constructing dynamic simulation network, also provides many functions for set the values of bandwidth and delay of edges and provides the interface to change them automatically.Furthermore, because of the strong dynamic of P2P network and the long time for simulating the large scale P2P network, observation of P2P simulation running instance in real time is required. An algorithm, quickly computing the network diameter, is proposed which can get the large scale P2P network diameter in real time, one of the most important network parameter. The algorithm, fast computing network diameter, combines knowledge of graph compressing and Floyd algorithm. This paper researches and analyzes the algorithm by various experiments of random network topology compressing and power-law network topology compressing, and verifies the capability, efficiency and feasibility of it with the analysis of time complexity, while compares with other compressing algorithms.Moreover, this paper proposes the technology of compatibility with real P2P network, which can make the plenty virtual nodes connect the entities on the real P2P network continuously and independently. Using the technology, P2P-PA can collect the information of real P2P network low-costly and large-scalely.At last, the exhibition of IP distributing on BT network collected by P2P-PA and the test of P2P-PA performance is desicribe, which can prove P2P-PA works well and achieve the purposes, method of low-cost to collect the information of large-scale P2P network and to simulate dynamic P2P network...