Exchange-Based Incentive Mechanisms for Peer-to-Peer File Sharing

  • Authors:
  • Kostas G. Anagnostakis;Michael B. Greenwald

  • Affiliations:
  • -;-

  • Venue:
  • ICDCS '04 Proceedings of the 24th International Conference on Distributed Computing Systems (ICDCS'04)
  • Year:
  • 2004

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Abstract

Performance of peer-to-peer resource sharing networks depends upon the level of cooperation of the participants. To date, cash-based systems have seemed too complex, while lighter-weight credit mechanisms have not provided strong incentives for cooperation.We propose exchange-based mechanisms that provide incentives for cooperation in peer-to-peer file sharing networks. Peers give higher service priority to requests from peers that can provide a simultaneous and symmetric service in return. We generalize this approach to n-way exchanges among rings of peers and present a search algorithm for locating such rings. We have used simulation to analyze the effect of exchanges on performance. Our results show that exchange-based mechanisms can provide strong incentives for sharing, offering significant improvements in service times for sharing users compared to freeriders, without the problems and complexity of cash- or credit-based systems.