%0 Book Section %A Barbera, Mario %A Lombardo, Alfio %A Schembra, Giovanni %A Tribastone, Mirco %B Proceedings of the 15th EUROMICRO International Conference on Parallel, Distributed and Network-Based Processing, 2007. PDP '07 %D 2007 %F eprints:2563 %I IEEE %K Analytical models; Demography; Internet; Peer to peer computing; Performance analysis; Performance evaluation; Protocols; Sensitivity analysis; Steady-state; Stochastic processes %P 482-489 %T An analytical model of a BitTorrent peer %U http://eprints.imtlucca.it/2563/ %X In this paper we propose a Markovian model of BitTorrent. Unlike already developed works which capture demographic dynamics, it focuses on the behavior of individual peers. To this end, we center our attention on a generic peer, called tagged peer (TP); for each possible logical state of a BT peer-to-peer connection maintained by the TP, we consider a stochastic process which counts the number of such links, and characterize them according to their state. Validation is carried out and steady-state analysis is performed in order to illustrate how performance evaluation can be extracted from our model %Z Euromicro Conference on Parallel, Distributed and Network-based Processing, held in Naples (Italy), February 7-9, 2007