1 / 17

Public and private BitTorrent communities: A measurement study

Public and private BitTorrent communities: A measurement study M. Meulpolder, L. D’Acunto, M. Capotă , M. Wojciechowski, J.A. Pouwelse, D.H.J. Epema, H.J. Sips TU Delft. Contents. BitTorrent communities Goal Experimental setup Measurement results Conclusions. 2 /16.

betty
Download Presentation

Public and private BitTorrent communities: A measurement study

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Public and private BitTorrent communities: A measurement study M. Meulpolder, L. D’Acunto, M. Capotă, M. Wojciechowski, J.A. Pouwelse, D.H.J. Epema, H.J. Sips TU Delft

  2. Contents BitTorrent communities Goal Experimental setup Measurement results Conclusions 2/16

  3. BitTorrent communities Content discovery web pages Communities User accounts Comments Ratings Forums Public and private 3/16

  4. Motivation and goal Private communities employ more incentives Are there differences between public and private? Download speed Connectability Seeding duration Seeder/leecher ratio Fraction of bytes from seeders 4/16

  5. 6/16

  6. Experimental setup 7/16

  7. Measurement details Time - September to December 2009 508 269 users 444 swarms Over 20 million bitfields 8/16

  8. Download speed 9/16

  9. Download speed Vs. previous results Guo, IMC 2005, public 160 kbit/s mean Pouwelse, IPTPS 2005, public 240 kbit/s mean 4 x higher overall mean 36 x higher PolishTracker mean 10/16

  10. Connectability 11/16

  11. Connectability Vs. previous results Pouwelse, IPTPS 2005 40% overall, same as today 2 x lower PolishTracker mean Mol, P2P 2008 66% for ThePirateBay 45% for TVTorrents 12/16

  12. Seeders and leechers 13/16

  13. Seeding duration 14/16

  14. Seeding duration Previous results Pouwelse, IPTPS 2005 83% < 1 h Guo, IMC 2005 8% > 1 day 15/16

  15. Source of incoming bytes 16/16

  16. Conclusions Private vs. public Speed is 3-5 times faster Percentage of unconnectable peers is 1/2 Seeder/leecher ratio is at least 10 times higher Seeding duration is much longer The tit-for-tat mechanism is much less important 17/16

More Related