On the impact of the flow size distribution's tail index on network performance with TCP connections

Authors:
Oana Goga;Patrick Loiseau;Paulo Gonçalves
Affiliations:
CNRS and UPMC Sorbonne, Universités, France;University of California, Santa Cruz, CA;INRIA and Université de Lyon / ENS Lyon, France
Venue:
ACM SIGMETRICS Performance Evaluation Review - Special Issue on IFIP PERFORMANCE 2011- 29th International Symposium on Computer Performance, Modeling, Measurement and Evaluation
Year:
2011

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Abstract

In this paper, we study the impact of the flow-size distribution on network performance in the case of a single bottle-neck with finite buffer. To tackle the case where flows are transmitted with the TCP protocol, we use real experiments and ns-2 simulations. Our preliminary results show that the distribution's tail index impacts the performance in a more complex way than what is reported in existing literature. In particular, we exhibit situations where a heavier tail gives better performance for certain metrics. We argue that a main cause of our observed results is the transient behavior at the beginning of each flow.