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Topological Density Variations Over Time

Analysis of topological density variations over time in HTTP and Kazaa P2P traffic. Data collected for 6 weeks studied through BGP paths. Assessing impact on P2P usage and applications enhancement possibilities.

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Topological Density Variations Over Time

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  1. Topological Density Variations Over Time A Comparison Between HTTP and Kazaa Peer to Peer Traffic Chris Rapier – Pittsburgh Supercomputing Center rapier@psc.edu

  2. Data Collection • Taking 60s traces using CoralReef every 5 min for the past 6-10 months • Collected on both inbound and outbound ports of OC3 on 2 different routers • Data used here is roughly 6 weeks of outbound traffic; Oct 13 – Nov 25.

  3. Topological Density • Traffic is matched to BPG path • Each BGP hop is considered a shell • P(t) is percentage of traffic in shell i • P(n) is percentage of ASes in shell i • V is the volume of shell i • Still working on fully validating this concept HOWEVER…

  4. What Does It All Mean? • P2P, as expected, is incredibly volatile in terms of topology even when the traffic is relatively stable • Will this have an effect on which P2P model can be used for which application? • Can this be used to enhance the functionality of P2P?

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