OpenSample: A Low-Latency, Sampling-Based Measurement Platform for Commodity SDN

Abstract

In this paper we propose, implement and evaluate OpenSample: a low-latency, sampling-based network measurement platform targeted at building faster control loops for software-defined networks. OpenSample leverages sFlow packet sampling to provide near-real-time measurements of both network load and individual flows. While OpenSample is useful in any context, it is particularly useful in an SDN environment where a network controller can quickly take action based on the data it provides. Using sampling for network monitoring allows OpenSample to have a 100 millisecond control loop rather than the 1-5 second control loop of prior polling-based approaches. We implement OpenSample in the Floodlight Open Flow controller and evaluate it both in simulation and on a test bed comprised of commodity switches. When used to inform traffic engineering, OpenSample provides up to a 150% throughput improvement over both static equal-cost multi-path routing and a polling-based solution with a one second control loop.

DOI: 10.1109/ICDCS.2014.31

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@article{Suh2014OpenSampleAL, title={OpenSample: A Low-Latency, Sampling-Based Measurement Platform for Commodity SDN}, author={Junho Suh and Ted Taekyoung Kwon and Colin Dixon and Wes Felter and John B. Carter}, journal={2014 IEEE 34th International Conference on Distributed Computing Systems}, year={2014}, pages={228-237} }