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A Resource-Efficient Traffic Localization Scheme for Multiple BitTorrents

The emergence of peer-to-peer (P2P) applications has posed a threat to the operating cost of Internet Service Providers (ISPs) due to the large amount of inter-ISP traffic generated. The problem stems from the mismatch between the P2P overlay network formed randomly and the underlying physical network. Recently, BitTorrent has attracted enormous users by its convenience of large-scale content distribution and has also become a major challenge for ISPs. Therefore, in this paper we proposed an effective B-Proxy scheme to evaluate through realistic simulation on PlanetLab, where hundreds of BitTorrent clients were executed during the experiment. Simulation results show that more than thirty percent of inter-ISP traffic could be saved in a torrent with a relatively small cache size consumed which is only eighth times that of the original file.