Analyzing the dynamics and resource usage of p2p file sharing by a spatio-temporal model

  • Authors:
  • Riikka Susitaival;Samuli Aalto;Jorma Virtamo

  • Affiliations:
  • Helsinki University of Technology, Finland;Helsinki University of Technology, Finland;Helsinki University of Technology, Finland

  • Venue:
  • ICCS'06 Proceedings of the 6th international conference on Computational Science - Volume Part IV
  • Year:
  • 2006

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Abstract

In this paper we study the population dynamics and resource usage optimization of a P2P file sharing system, where the availability of the requested file is not guaranteed. We study the system first by a deterministic fluid model and then by a more detailed Markov chain analysis that allows estimating the life time of the system. In addition, the underlying topology of the network is modelled by a simple geometry. Using the resulting spatio-temporal model we assess how much the resource usage of the network can be reduced, e.g., by selecting the nearest seed for download instead of a random one.