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Flexspander: augmenting expander networks in high-performance systems with optical bandwidth steering

Journal Article · · Journal of Optical Communications and Networking
DOI:https://doi.org/10.1364/JOCN.379487· OSTI ID:1601693
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Communication efficiency is one of the deciding factors in determining many of today’s high-performance computing (HPC) applications. Traditionally, HPC systems have been on static network topologies, making them inflexible to the variety of skewed traffic demands that may arise due to the spatial locality inherent in many applications. To handle traffic locality, researchers have proposed integrating optical circuit switches (OCSs) into the network architecture, which reconfigures the network topology to alter and dynamically adapt to the predicted traffic. In this paper, we present a novel reconfigurable network topology called Flexspander. Beyond offering a flexible interconnect, Flexspander also offers full flexibility in terms of construction and can be built with any arbitrary combination of commercial electrical packet switches and OCSs. We evaluate Flexspander performance through extensive simulations with multiple network traces, and our results show improved performance for Flexspander over currently proposed static and reconfigurable topologies in terms of the flow completion time.

Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI ID:
1601693
Alternate ID(s):
OSTI ID: 1803989
Journal Information:
Journal of Optical Communications and Networking, Journal Name: Journal of Optical Communications and Networking Journal Issue: 4 Vol. 12; ISSN JOCNBB; ISSN 1943-0620
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

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