Study of P2P Intelligent Overlay Middleware Model

In order to improve the developing efficiency of P2P application and to reduce the developing costs, this paper, presents the concept of P2P service middleware, and constructs P2P intelligent overlay middleware model which separates the basic P2P service from the special function of Internet application and encapsulates to independent middleware to support different P2P servers. The model, 1) by utilizing topology detecting technology of physical network based on the application layer, optimizes P2P overlay topology to according to the topology of physical network; 2) gathers physical neighboring node of peer to construct a virtual superpeer that provide services for other nodes as a whole, which weakens the effect of peer churning to system performance; 3) uses link evaluating algorithm to choose the optimal routing path, and to improve the searching and transmitting efficiency of system. Finally, simulating experiment and system testing results show that this model improves system performance obviously.