Abstract: Distributed structured peer-to-peer network can provide precise resource discovery and has a good scalability and self-organizing capabilities,so it has become the focus of the study. However,the research often focuses on how to improve routing efficiency and neglects of other serious problems. This paper proposed a multi-peers cluster P2P system. In the system,multiple peers could have same identifier. They form a cluster. All peers in a cluster save the same resource. So the resource was not lost even if one or more peers failed suddenly. The multiple copies of the resource could work together to effectively improve the download speed. Most of the structured peer-to-pcer systems only provide the precise key query. I}his system could automatically collect related keywords on the query route. Using this method, the fuzzy query could be implemented according to related keywords. Experimental results show that this work is effective and efficient.

Key words: Peer-to-peer computering, Fuzzy query, Arithmetic