Circuit Switching Under the Radar with REACToR

Authors: 

He Liu, Feng Lu, Alex Forencich, Rishi Kapoor, Malveeka Tewari, Geoffrey M. Voelker, George Papen, Alex C. Snoeren, and George Porter, University of California, San Diego

Abstract: 

The potential advantages of optics at high link speeds have led to significant interest in deploying optical switching technology in data-center networks. Initial efforts have focused on hybrid approaches that rely on millisecond-scale circuit switching in the core of the network, while maintaining the flexibility of electrical packet switching at the edge. Recent demonstrations of microsecond-scale optical circuit switches motivate considering circuit switching for more dynamic traffic such as that generated from a top-of-rack (ToR) switch. Based on these technology trends, we propose a prototype hybrid ToR, called REACToR, which utilizes a combination of packet switching and circuit switching to appear to end-hosts as a packet-switched ToR. In this paper, we describe a prototype REACToR control plane which synchronizes end host transmissions with end-to-end circuit assignments. This control plane can react to rapid, bursty changes in the traffic from end hosts on a time scale of 100s of microseconds, several orders of magnitude faster than previous hybrid approaches. Using the experimental data from a system of eight end hosts, we calibrate a hybrid network simulator and use this simulator to predict the performance of larger-scale hybrid networks.

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BibTeX
@inproceedings {179749,
author = {He Liu and Feng Lu and Alex Forencich and Rishi Kapoor and Malveeka Tewari and Geoffrey M. Voelker and George Papen and Alex C. Snoeren and George Porter},
title = {Circuit Switching Under the Radar with REACToR},
booktitle = {11th {USENIX} Symposium on Networked Systems Design and Implementation ({NSDI} 14)},
year = {2014},
isbn = {978-1-931971-09-6},
address = {Seattle, WA},
pages = {1--15},
url = {https://www.usenix.org/conference/nsdi14/technical-sessions/presentation/liu_he},
publisher = {{USENIX} Association},
month = apr,
}

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