Monday February 4 4:00 - 4:50 PM Kelley 1001
Reza Rejaie Department of Computer and Information Science University of Oregon The IonP2P Project: Empirical Characterizations of P2P Systems During recent years, the pervasive deployment of Peer-to-Peer (P2P) systems had a profound impact on the Internet that is even more tangible than the impact of the Web. Ease of deployment and self-scaling are two key factors that continue to fuel the growing popularity of the P2P communication paradigm for a wide spectrum of large scale commercial systems ranging from content distribution to Internet telephony (e.g. Skype) and Internet TV. Despite the importance of the P2P communication paradigm and the far reaching impact of P2P systems on the Internet, fundamental properties and in particular the dynamics of large scale P2P systems are not well understood. In this talk, I present an overview of the IonP2P project. The goal of this project is to investigate and develop new measurement and modeling methodologies to understand and accurately characterize properties and dynamics of large scale P2P systems. First I show that the key challenge in accurately characterizing large scale P2P systems is to capture their representative (i.e. unbiased) "snapshots". I demonstrate how the dynamic and heterogeneous nature of real-world P2P systems can introduce bias into the selection of representative samples of peer properties (e.g. degree, link bandwidth, number of files shared). Then, I present the Metropolized Random Walk with Backtracking (MRWB) as a viable and promising technique for collecting nearly unbiased samples. Our extensive simulation study and empirical evaluation demonstrate that MRWB works well for a wide variety of commonly- encountered P2P network conditions. Further information on the IonP2P project is available at (http://mirage.cs.uoregon.edu/P2P/). The IonP2P project is funded in part by NSF and Cisco. Biography: Reza Rejaie is currently an Assistant Professor at the Department of Computer and Information Science at the University of Oregon. From October 1999 to March 2002, he was a Senior Technical Staff member at AT&T Labs-Research in Menlo Park, California. Reza received a NSF CAREER Award for his work on P2P streaming in 2005. At UO, Reza has founded Multimedia & Internetworking Research Group (Mirage). In the research community, Reza is on the editorial board of several journals and has served on the program committee of major conferences and workshops including INFOCOM, Internet Measurement Conference (IMC), ICNP, Global Internet, IEEE Multimedia, ACM Multimedia, NOSSDAV, and ICDCS. He has been a senior member of both the ACM and IEEE since September 2006. Reza received his M.S. and Ph.D. degrees in computer science from the University of Southern California(USC) in 1996 and 1999 respectively. During his graduate study at USC, he participated in several projects at Information Sciences Institute(ISI), the Computer Networks and Distributed Systems Research Laboratory and the Database Laboratory. He completed his B.S. degree in Electrical Engineering at Sharif University of Technology, Tehran, Iran, in 1991.
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