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In Peer-To-Peer (P2P) file sharing networks, file replication avoids overloading file owner and improves file query efficiency. Most current methods replicate a file along query path from a client to a server. These methods lead to large number of replicas and low replica utilization. Aiming to achieve high replica utilization and efficient file query, this paper presents an interest-oriented file replication mechanism. It clusters nodes based on node interest. Replicas are shared by nodes with common interest, leading to less replicas and overhead, and enhancing file query efficiency. Simulation results demonstrate the effectiveness of the proposed mechanism in comparison with another file replication method. It dramatically reduces the overhead of file replication and improves replica utilization.
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