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Improving BitTorrent Network's Performance via Deploying Helpers

This paper presents a study on how to increase the BitTorrent Networkpsilas performance via deploying Helpers by modeling, simulating and analyzing. We first define some high-bandwidth, high-connection and controllable super nodes as Helpers, and then try to find the best way to deploy them. Unlike other researchers, we focus on combining the advantages of both multi-server systems and BitTorrent Systems. Our main findings includes: (1) Deploying Helpers into BitTorrent Systems can distinctly enhance the system performance until the overall uploading bandwidth is no longer the constraint condition. (2) After deploying Helpers, the system can present resistance against selfish peers. (3) We can dynamically change the content of Helpers to serve the ever-changing hot torrents and make it only serve charged peers or local peers from economic angle.