NDLI: Partitioning Network Testbed Experiments

Content Provider	IEEE Xplore Digital Library
Author	Wei-Min Yao Fahmy, S.
Copyright Year	2011
Abstract	Understanding the behavior of large-scale systems is challenging, but essential when designing new Internet protocols and applications. It is often infeasible or undesirable to conduct experiments directly on the Internet. Thus, simulation, emulation, and testbed experiments are important techniques for researchers to investigate large-scale systems. In this paper, we propose a platform-independent mechanism to partition a large network experiment into a set of small experiments that are sequentially executed. Each of the small experiments can be conducted on a given number of experimental nodes, e.g., the available machines on a testbed. Results from the small experiments approximate the results that would have been obtained from the original large experiment. We model the original experiment using a flow dependency graph. We partition this graph, after pruning uncongested links, to obtain a set of small experiments. We execute the small experiments in two iterations. In the second iteration, we model dependent partitions using information gathered about both the traffic and the network conditions during the first iteration. Experimental results from several simulation and testbed experiments demonstrate that our techniques approximate performance characteristics, even with closed-loop traffic and congested links. We expose the fundamental trade off between the simplicity of the partitioning and experimentation process, and the loss of experimental fidelity.
Starting Page	299
Ending Page	309
File Size	404861
Page Count	11
File Format	PDF
ISBN	9781612843841
ISSN	10636927
DOI	10.1109/ICDCS.2011.22
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Network topology Emulation Partitioning algorithms Internet Topology Computational modeling Upper bound network testbeds network simulation network emulation
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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