File-aware P2P traffic classification: An aid to network management
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File-aware P2P traffic classification: An aid to network management Tian Song · Zhou Zhou
Received: 3 March 2012 / Accepted: 17 September 2012 / Published online: 16 October 2012 © Springer Science+Business Media New York 2012
Abstract As P2P dominates Internet traffic in recent years, ISPs are striving to balance between providing the basic networking services for P2P users and properly managing network bandwidth usage. That is, ISPs are required to provide proper bandwidth for each P2P user to get every file to fulfill their provision for communications, while they have to control bandwidth consumption for efficient usage. However, current P2P traffic management strategies are unable to satisfy both requirements. In this paper, our goal is to design a simple and effective scheme for ISPs to moderate the tradeoff. It is achieved by proposing a file-aware P2P traffic classification method that can identify files and the associated flows. The file-level information can lead to more efficient and flexible management strategies on a per-file basis. We offer two alternatives: constraining the per-file bandwidth consumption and the number of per-file concurrent flows. Finally, a real-life trace is measured using our file-aware method from the perspectives of peers and files. The results indicate that
T. Song (B) Beijing Laboratory of Intelligent Information Technology, School of Computer Science and Technology, Beijing Institute of Technology, Beijing, China e-mail: [email protected] T. Song State Key Laboratory of Networking and Switching Technology, Beijing University of Post and Telecommunications, Beijing, China Z. Zhou Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China e-mail: [email protected]
ISPs can gain enough opportunities to flexibly choose proper traffic manage parameters according to actual demands. Keywords Peer-to-peer · Traffic classification · Fairness · Traffic management
1 Introduction With the increasing proliferation of broadband, more and more users are using P2P applications to exchange large video/audio files and software. The ability to obtain digital files easily and freely has transformed P2P applications to the leading “killer app” on the Internet. These applications may highly congest a network, and consume a great number of network resources, especially in rush hours. It is estimated that up to 70 % of an Internet Service Provider’s (ISP) network bandwidth is occupied by P2P traffic [29] in the year of 2008 to 2009. In recent three years, although Web based applications burst and the traffic of HTTP is increasing fastly, P2P is still the most of today’s traffic. The bandwidth-hungry nature of P2P applications which has significant impact on the Internet is derived from the P2P architecture itself. Compared to the traditional client/server model, peers in P2P networks make their resources directly available to other peers, without the control need of central servers. To remarkably increase the download speed of a requested file, most P2P applications
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