PP-COSE: a P2P community search scheme

P2P systems allow peers communicate with each other directly. Most P2P systems aimed at one specific application only, such as file sharing, or instant messaging. Each P2P system requires its own search scheme to find the sharing resources. We propose to integrate P2P systems with community support. Thus, a peer joining one P2P system could access multiple applications. This paper introduces a P2P community search (PP-COSE) scheme support efficient peer search in generalized P2P systems. To make efficient searching, the P2P network is formed by small clusters. Queries are processed by search router in each cluster. A community filtering mechanism is designed to reduce the management overhead. Less important or unpopular communities are filtered out, and the number of advertised communities in each search router is controlled. A test bed is implemented to measure the performance. The results show that the PP-COSE with routed forwarding may reduce the query cost up to 80% comparing with flooding forwarding.