Kaune, Sebastian and Rumin, Ruben Cuevas and Tyson, Gareth and Mauthe, Andreas and Guerrero, Carmen and Steinmetz, Ralf (2010) Unraveling BitTorrent’s File Unavailability:Measurements and Analysis. In: IEEE Tenth International Conference on Peer-to-Peer Computing (P2P), 2010. IEEE, pp. 1-9. ISBN 978-1-4244-7140-9Full text not available from this repository.
BitTorrent suffers from one fundamental problem: the long-term availability of content. This occurs on a massive-scale with 38% of torrents becoming unavailable within the first month. In this paper we explore this problem by performing two large-scale measurement studies including 46K torrents and 29M users. The studies go significantly beyond any previous work by combining per-node, per-torrent and system-wide observations to ascertain the causes, characteristics and repercussions of file unavailability. The study confirms the conclusion from previous works that seeders have a significant impact on both performance and availability. However, we also present some crucial new findings: (i) the presence of seeders is not the sole factor involved in file availability, (ii) 23.5% of nodes that operate in seedless torrents can finish their downloads, and (iii) BitTorrent availability is discontinuous, operating in cycles of temporary unavailability.
|Item Type:||Contribution in Book/Report/Proceedings|
|Subjects:||Q Science > QA Mathematics > QA75 Electronic computers. Computer science|
|Departments:||Faculty of Science and Technology > School of Computing & Communications|
|Deposited On:||29 Jun 2010 13:19|
|Last Modified:||26 Jul 2012 23:27|
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