Abstract: In DHT-based structured P2P system, as a result of the use of distributed hash table, every node can achieve the basic load balancing, but nodes have different capacity to bear the load, and data access has "flash crowds" phenomenon, so there are still load unbalancing in every node. For this disadvantage, we proposed an algorithm for distributed load balancing in which local information adjusts load. And then the problem of single node invalidation is avoided, the implement of algorithm is very simple.

Key words: DHT, Structured P2P system, Load balancing, Virtual server