关键词: 对等网络, 搜索, 分布式哈希表, CHORD

Abstract: Based on CHORD in the structure peer-to-peer network，the search performance is a very important target.Now the CHORD search algorithms all are a group search.This article has made certain improvements to the CHORD search algorithm，when the search no longer merely just starting from the current pitch point，along a way search，but along the current node and it’s all points adjacent to a number of search paths simultaneously，so that it can speed up the search for speed，meanwhile adopts the neighbor pitch points partial duplication resources and buffer information of the recently visited pitch points，when downloading not only may from current pitch point downloading，when pitch point load overweight also is allowed from neighbor pitch point downloading，to reduce the pitch point load overweight question because of the popular resources，speeding up the popular resources search process，the simulation experiments show that the improved CHORD search algorithm has the find better efficient than current CHORD search algorithm，the load balancing and system robustness to excellent.

Key words: P2P network, search, distributed hash table, CHORD