Abstract:

A tagbased file search method was designd for point to point (P2P) system to solve the large consumption of network bandwidth and slow query problem, which determines a way of uploading associated files held by each peer in the bottom layer to subservers in the middle layer and a way of forwarding a query received by the central server in the top layer to an appropriate subserver relevant to the query. A technique of priority sequence of tags was introduced to realize a quick forwarding of queries. The result of performance evaluation indicates that the number of tags which must be examined in forwarding a given query is bounded by a small constant, so as to save network bandwidth and raise the speed of file searching.

Key words: P2P system, tag, file search