Bandwidth Allocation and Peer Selection Methods in BitTorrent Systems

[ES] Evaluación de un protocolo BitTorrent modificado, empleando un Simulador.¿¿¿¿¿[EN] The BitTorrent protocol is one of the most successful Peer-to-Peer systems and has received immense attention from researchers as well as the industry. In order to improve its performance a series of protocol modi cations have been published and investigated. Focus of this work was set a subset of these improvements that intend to optimize the Bandwidth Scheduling as well as Peer selection. To evaluate some of the most promising protocol modi cations they have been implemented inside a Peer Overlay Simulator and tested extensively against the unmodi ed BitTorrent protocol. This work is therefore presenting a series of protocol modi cations, a newly developed Peer Overlay Simulator that is publicly available and results that shows under which circumstances the modi cated protocol outperforms the traditional BitTorrent protocol.Pasieka, M. (2012). Algoritmos de asignación de ancho de banda y selección de peers para sistemas BitTorrent¿. http://hdl.handle.net/10251/29879Archivo delegad

A BitTorrent Module for the OMNeT++ Simulator

Abstract — In the past few years numerous peer to peer file sharing, or more generally content distribution, systems have been designed, implemented, and evaluated via simulations, real world measurements, and mathematical analysis. Yet, only a few of them have stood the test of time and gained wide user acceptance. BitTorrent is not just one such system; it holds the lion’s share among them. The reasons behind its success have been studied to a great extent with interesting results. Nevertheless, even though peer to peer content distribution remains one of the most active research areas, little progress has been made towards the study of the BitTorrent protocol, and its possible variations, in a fully controllable but realistic simulation environment. In this paper we describe and analyze a full featured and extensible implementation of BitTorrent for the OMNeT++ simulation environment. Moreover, since we aim to establish a realistic simulation platform, we show our enhancements to a conversion tool for a popular Internet topology generator and a churn generator based on the analysis of real BitTorrent traces. Finally we present the results from the evaluation of our prototype implementation regarding resource demands under different simulation scenarios. I