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Optimizing
BitTorrent for On-Demand Streaming Abstract: This talk presents an analytical model to characterize the
behavior of on-demand stored media content delivery using BitTorrent-like
protocols. The model captures the effects of different piece selection
policies, including Rarest-First, Zipf, and several variants of InOrder. The
model provides insight into transient and steady-state system behavior, and
helps to explain the sluggishness of system throughput with strict InOrder
streaming. We use the model to compare different retrieval policies across a
wide range of system parameters, including upload and download bandwidth,
flow concurrency, and seed residence time. We also provide quantitative
results on the start-up delays and retrieval times for streaming media
delivery. This talk represents joint work with Nadim Parvez, Anirban
Mahanti, and Niklas Carlsson. ______ Dr. Carey Williamson is a Professor in the Department of
Computer Science at the University of Calgary, where he holds an iCORE
(Informatics Circle of Research Excellence) Chair in "Broadband Wireless
Networks, Protocols, Applications, and Performance". His educational background includes a B.Sc.(Honours)
degree in Computer Science from the University of Saskatchewan in 1985, and a
Ph.D. in Computer Science from Stanford University in 1992. Dr. Williamson's research interests include Internet
protocols, wireless networks, network traffic measurement, workload
characterization, network simulation, P2P systems, and Web server
performance. Host: Mark Claypool Last modified: Apr15th, 2009 |
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