[IP] Understanding BitTorrent: An Experimental Perspective
Begin forwarded message:
From: Dewayne Hendricks <dewayne@xxxxxxxxxxxxx>
Date: November 10, 2005 9:58:29 PM EST
To: Dewayne-Net Technology List <dewayne-net@xxxxxxxxxxxxx>
Subject: [Dewayne-Net] Understanding BitTorrent: An Experimental
Perspective
Reply-To: dewayne@xxxxxxxxxxxxx
BitTorrent is a recent, yet successful peer-to-peer protocol focused
on efficient content delivery. To gain a better understanding of the
key algorithms of the protocol, we have instrumented a client and run
experiments on a large number of real torrents. Our experimental
evaluation is peer oriented, instead of tracker oriented, which
allows us to get detailed information on all exchanged messages and
protocol events. In particular, we have explored the properties of
the two key algorithms of BitTorrent: the choke and the rarest first
algorithms. We have shown that they both perform remarkably well, but
that the old version of the choke algorithm, that is still widely
deployed, suffers from several problems. We have also explored the
dynamics of a peer set that captures most of the torrent variability
and provides important insights for the design of realistic models of
BitTorrent. Finally, we have evaluated the protocol overhead. We have
found in our experiments a small protocol overhead and explain under
which conditions it can increase.
Paper is available at: <http://hal.inria.fr/inria-00000156/en>
Weblog at: <http://weblog.warpspeed.com>
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