Abstract: Loading balancing is one of research hotspot of P2P network. There exist many problems such as low load-balancing degree and excess assumption conditions etc. in existing load-balancing technology. I}he paper proposed an en-hanced load-balancing algorithm: ELB P2P. The algorithm assigns rational load and corresponding )D address space that can be dynamicly regulated to every peer in P2P system. In addition, the algorithm introducesd flux control mechanism,and automatically selected light load peers with low delay and high bandwidth for load diversion. hhe experiments demonstrate: compared with traditional Chord protocol, the ELI3-P2P algorithm has faster velocity of load balancing, less spending of load-diversion, and more excellent stability of P2P system, furthermore, it still obtains high load-balancing degree in the event that P2P network load is very heavy, and without stern limitation and assumption conditions aiming to property of peers.

Key words: Load balancing, Load-balancing spending, P2P network, Virtual servers