Research On Distributed Storage Key Technology Based On P2P Network

Aiming at these problems of small capacity,poor scalability and high cost in the traditional centralized storage technology,this paper proposes a distributed storage system based on P2 P networks and gives the implementation strategy of distributed system.The system can connects computers scattered on the Internet via P2 P technology and integrate idle resources on these computers to form an inexpensive,scalable,high-performance,and highly reliable distributed system.The paper focuses on the key technology in distributed storage system.The main research work is as follows:1.An improved Chord routing algorithm is proposed.In this paper,an improved Chord routing algorithm is proposed to solve problems of redundant information in original Chord routing and inefficient search.These clockwise and counterclockwise routing table are established using the opposite node to implement bidirectional search.Meanwhile,the routing table construction method is improved to reduce redundant items in routing tables.Theoretical analysis and simulation results show that the proposed algorithm can reduce the average path length of queries and improve the search efficiency.2.A replica consistency maintenance algorithm based on information binary tree(RBT)is proposed.RBT uses the Chord protocol to manage node's replica and constructs the information binary tree with the routing table.It saves copies of files on the binary tree to avoid single point of failure.By the spanning tree,the copy update information can be transmitted to the underlying network quickly.The experiment proved that the algorithm can reduce the network delay,reduce network maintenance costs and improve the reliability of the system.3.A distributed storage and resource discovery prototype system based on P2 P network is designed,which realizes the function of information retrieval and replica management,and validates the theoretical research of this paper.