Research On Availability Modeling And Simulation Based On P2P Network

With the emergence of P2 P network,it is possible to deploy a cheap and available distributed computing network on the Internet.At the same time,it also affects the development of the whole Internet industry and the whole society.P2 P network makes the use rights of the whole distributed computing environment popular,but at the same time,due to the dynamic and changing characteristics of P2 P network,the requirements for the availability of P2 P network become more and more important.In the process of resource integration,whether the network is available is one of the first questions for users to consider.Therefore,from the perspective of the long-term development trend of P2 P network,the research on the availability of P2 P network is of great significance to the future development of P2 P network and the evaluation of comprehensive performance.Firstly,starting from the definition and characteristics of P2 P network and the defects and problems existing in P2 P network,this paper makes a systematic research on P2 P network,studies the availability theory,availability method,availability parameter system and Markov mathematics theory,and puts forward the availability hierarchical conceptual system model of network system,Due to the complexity of P2 P network system,the state of nodes in the network changes constantly,and the probability of node failure in P2 P network system is very high.Therefore,this paper establishes the state transition matrix function of P2 P network according to the characteristics of P2 P network and the operation state of nodes in the network system by studying the relevant indicators of network availability,Based on Markov mathematical theory,the availability of P2 P network is modeled and analyzed.Then,by establishing the Markov mathematical model of repairable systems in different states of P2 P network and analyzing it with finite state Markov chain,it can accurately and comprehensively describe the multi node operation state of P2 P complex network system,so as to establish the mathematical model of network availability through a series of modeling and derivation processes,Finally,the mathematical models of steady-state availability and instantaneous availabilityof P2 P network,as well as the calculation models of delay,throughput and availability are obtained.Then,for the established steady-state,instantaneous,delay and throughput availability models,according to the calculation method of the established model,the calculation results of the theoretical model under different parameters are given,and the results are analyzed and demonstrated.Finally,based on the OPNET simulation platform,using the three-layer network modeling mechanism of OPNET,through the simulation model design,the P2 P network simulation model is established from the three levels of network layer,node layer and process layer respectively,the P2 P communication network availability is simulated and modeled,and the theoretical results and simulation results are compared and verified.The results show that the P2 P network availability evaluation model proposed in this paper is effective and correct.