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1 GANG - Networks, Graphs and Algorithms LIAFA - Laboratoire d-informatique Algorithmique : Fondements et Applications, Inria Paris-Rocquencourt 2 LINCS - Laboratory of Information, Network and Communication Sciences

Abstract : Seeders peers that do not request anything hut contribute to the system allow to leverage the capacities of a P2P system. While seeding is a natural idea for fllesharing or Video-on-Demand applications, it seems somehow counter-intuitive in the context of live streaming. This paper aims at describing the feasibility and performance of P2P live seeding. After a formal definition of -live seeding- and efficiency, we consider the theoretical performance of systems where the overhead is neglected. We then propose a realistic overhead model and extend the results for this model. The performance of a single seeder and a set of seeders are considered, as it is not always possible to perfectly aggregate individual efficiencies. In details, we provide an explicit upper bound of seeders- achievable efficiency in a P2P system with linear overhead. We also propose and study two simple mechanisms that allow to deploy a live seeding architecture while handling seeders aggregation, providing near-optimal seeding.

Keywords : P2P live streaming P2P system fllesharing live seeding architecture near-optimal seeding video-on-demand applications peer-to-peer computing video streaming

Autor: Fabien Mathieu -



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