BitTorrent or BitCrunch: evidence of a credit squeeze in BitTorrent?

Hales, David; Rahman, Rameez; Zhang, Boxun; Meulpolder, Michel and Pouwelse, Johan (2009). BitTorrent or BitCrunch: evidence of a credit squeeze in BitTorrent? In: 18th IEEE International Workshops on Enabling Technologies: Infrastructures for Collaborative Enterprises, 2009. WETICE '09, 29 Jun - 01 Jul 2009, Groningen.

DOI: https://doi.org/10.1109/WETICE.2009.22

URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arn...

Abstract

BitTorrent is a highly popular peer-to-peer file sharing protocol. Much BitTorrent activity takes place within private virtual communities called "private trackers" - a server that allows only community members to share files. Many private trackers implement "ratio enforcement" where the tracker monitors the upload and download behavior of peers. If a peer downloads substantially more than it uploads then service is terminated. Tracker policies related to credit effect the performance of the community as a whole. We identify the possibility of a "credit squeeze" in which performance is reduced due to lack of credit for some peers. We consider statistics from a popular private tracker and results from a simple model (called "BitCrunch").

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