On uncoordinated file distribution with non-altruistic downloaders

Ilkka Norros, Balakrishna Prabhu, Hannu Reittu

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)


We consider a BitTorrent-like file sharing system, where the peers interested in downloading a large file join an overlay network. The seed node possessing the file stays in the system, whereas all other peers are non-altruistic in the sense that they leave the system as soon as they have downloaded the whole file. We consider a flash crowd scenario, where the peers join the overlay simultaneously. We show that the chunk selection algorithm is critical, propose an analytic approach to the process, and find that the encounters can be restricted to neighbours in a Chord overlay without losing much in performance.
Original languageEnglish
Title of host publicationProceedings of the 20th International Teletraffic Congress, ITC20 2007
Subtitle of host publicationManaging Traffic Performance in Converged Networks
EditorsL. Mason, T. Drwiega , J. Yan
Place of PublicationBerlin
ISBN (Electronic)978-3-540-72990-7
ISBN (Print)978-3-540-72989-1
Publication statusPublished - 2007
MoE publication typeA4 Article in a conference publication
Event20th International Teletraffic Congress, ITC20 2007: Managing traffic performance in converged networks - Ottawa, Canada
Duration: 17 Jun 200721 Jun 2007

Publication series

SeriesLecture Notes in Computer Science


Conference20th International Teletraffic Congress, ITC20 2007
Abbreviated titleITC 2007


  • peer-to-peer file-sharing

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