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IMC '05, 2005 Internet Measurement Conference — Abstract
Pp. 63–76 of the Proceedings
Should Internet Service Providers Fear Peer-Assisted Content Distribution?
Thomas Karagiannis, University of California, Riverside; Pablo Rodriguez, Microsoft Research; Konstantina Papagiannaki, Intel Research Cambridge
Abstract
Recently, peer-to-peer (P2P) networks have emerged as an
attractive solution to enable large-scale content distribution
without requiring major infrastructure investments. While such P2P
solutions appear highly beneficial for content providers and
end-users, there seems to be a growing concern among Internet
Service Providers (ISPs) that now need to support the distribution
cost. In this work, we explore the potential impact of future P2P
file delivery mechanisms as seen from three different
perspectives: i) the content provider, ii) the ISPs, and iii)
individual content consumers. Using a diverse set of measurements
including BitTorrent tracker logs and payload packet traces
collected at the edge of a 20,000 user access network, we quantify
the impact of peer-assisted file delivery on end-user experience
and resource consumption. We further compare it with the
performance expected from traditional distribution mechanisms
based on large server farms and Content Distribution Networks
(CDNs).
While existing P2P content distribution solutions may provide
significant benefits for content providers and end-consumers in
terms of cost and performance, our results demonstrate that they
have an adverse impact on ISPs' costs by shifting the associated
capacity requirements from the content providers and CDNs to the
ISPs themselves. Further, we highlight how simple “locality-aware" P2P
delivery solutions can significantly alleviate the induced cost at
the ISPs, while providing an overall performance that approximates
that of a perfect world-wide caching infrastructure.
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