Rahman, R.; Hales, D.; Vinkó, T.; Pouwelse, J. and Sips, H.
No more crash or crunch: sustainable credit dynamics in a P2P community.
In: 2010 International Conference on High Performance Computing and Simulation (HPCS 2010), 28 June - 2 July 2010, Caen, Normandy, France.
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Many peer-to-peer file sharing communities implement credit policies to incentivise users to contribute upload resources. Such policies implicitly assume a user model - how the user controlling each peer behaves. We show using an agent-based model that credit policies, based on bandwidth contribution, and a selfish user model, can lead to both “crunches” and “crashes” where the system seizes completely due to too little credit or too much credit. We explore the conditions that lead to these system pathologies and present a theoretical analysis that allows us to determine if a community is sustainable or will eventually crunch or crash. Finally we apply the analysis to produce a novel adaptive credit system that automatically adjusts credit policies to maintain sustainability.
|External Project Funding Details:
|Funded Project Name||Project ID||Funding Body|
|Not Set||Not Set||Future and Emerging Technologies programme FP7-COSI-ICT of the European Commission through project QLectives (grant no.: 231200)|
||Conference held in conjunction with the 6th International Wireless Communications and Mobile Computing Conference (IWCMC )
||P2P; economics; agent-based simulation; credits; incentives
||Mathematics, Computing and Technology > Engineering & Innovation
||07 Mar 2012 16:55
||12 Dec 2012 05:33
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