Peer-assisted online storage and distribution: modeling and server strategies

14 years 5 months ago

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Peer-assisted online storage and distribution systems have recently enjoyed large-scale deployment gaining increased popularity for multimedia content sharing in the Internet. Such systems typically deploy dedicated servers while eﬀectively leveraging peer bandwidth in a complementary fashion, in order to guarantee adequate levels of service quality and minimize server cost. In this paper, motivated by our recent empirical study on a real-world system, FS2You, we develop a mathematical model to characterize and understand peer-assisted online storage systems serving multiple ﬁles of diﬀerent popularity. Speciﬁcally, we examine and compare representative server bandwidth allocation strategies, and investigate the critical performance metrics and factors. We demonstrate that diﬀerent server strategies may lead to remarkably diﬀerent service qualities in terms of average downloading times, peer satisfaction levels and service quality diﬀerentiation. In particular, the curre...

Ye Sun, Fangming Liu, Bo Li, Baochun Li

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