2011 IEEE 36th Conference on Local Computer Networks (2011)
Oct. 4, 2011 to Oct. 7, 2011
Marc Espelt Palau , Universitat Rovira i Virgili, Dept. of Computer Engineering and Mathematics, Av. Paisos Catalans 26, E-43007 Tarragona, Spain
Pedro Garcia Lopez , Universitat Rovira i Virgili, Dept. of Computer Engineering and Mathematics, Av. Paisos Catalans 26, E-43007 Tarragona, Spain
In this paper we present the concept of community downloads as a mechanism to improve the overall performance of BitTorrent clients. A community is a group of nodes interested in the same content working cooperatively inside a swarm. To reinforce this cooperation among community nodes, we designed two new algorithms: Group Rarest-First (piece selection) and Group-Balanced Tit-for-tat (unchoke policy). Our algorithms treat the group as a big node, prioritizing community members and helping them to improve their download ratios. Our validation shows improvements in download time around 20% and up to 71% in different swarm scenarios.
M. E. Palau and P. G. Lopez, "Improving BitTorrent download times using community partners," 2011 IEEE 36th Conference on Local Computer Networks(LCN), Bonn, 2012, pp. 333-340.