This paper probes into the duplication management policy and the Gossip protocol,which is widely used in unstructured P2P network,and proposes a strategy of node choosing to store duplications by using fuzzy theory.

• 对非结构化P2P网络中广泛应用的Gossip协议和副本管理策略进行了探索和研究,运用模糊理论提出一种副本存储节点的选择策略。