Study On The Data Storage And Recovery Reliability Of P2P Network

This paper mainly studied the problem of data storage and recovery reliability of P2 P network.P2 P networks have the reciprocity,that is,network nodes have the same status and can communicate with each other.Its topological structure includes the types of fully distributed unstructured,fully distributed structured and mixed,in which the fully distributed structured P2 P network is mainly composed of ring,tree and mesh.Based on the topological structure of different P2 P networks and the particularity of data storage strategy,the network reliability calculation method was analyzed respectively.In chapter 1: firstly the background and the research significance of the P2 P network data storage system reliability was given,and we analyzed the status at home and abroad.Then we cleared the research goal and the innovation points.Finally we designed the article outline,and cleared the work needed to do.In chapter 2: based on the study of traditional network topology and reliability definition,the definition of P2 P network topology was given,and the definition method of P2 P network reliability was analyzed.Through comparison,it is concluded that the reliability research of P2 P network is different from traditional network reliability research.Then the core content of the research work was clarified.In chapter 3: based on the assumption of the edges and the nodes completely reliable,the reliability of the P2 P network data storage system is only related to whether the data store is normal or not.According to the different data redundancy strategies,which are full redundancy and erasure-code redundancy,the definition of reliability was given.In chapter 4: the data redundancy strategy and reliability definition of structured P2 P network were studied.Firstly,the Chord protocol was used to construct the structured P2 P network.Secondly,based on the consistency hash function,the node set of data backup was given.Then,the reliability definition and calculation method were given by constructing the positive and reverse information binary trees.Finally,the reliability definition of the whole network was given,and the data simulation and result analysis were carried out.In chapter 5: based on the hybrid P2 P network with super nodes in the actual situation,firstly the network topology structure was studied,and the detailed analysis and definition were given.Secondly,the data backup strategy was given based on the limit of node load.Finally,based on the hypothesis that only a leaf node can request information,we gave the calculation method of the reliability,and used the improvement the general generating function to calculate the reliability of communication network,then we gave the simulation experiment and the example.