NDLI: DOS: a scalable optical switch for datacenters

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DOS: a scalable optical switch for datacenters

Content Provider	ACM Digital Library
Author	Ye, Xiaohui Mejia, Paul Yoo, S. J. B. Proietti, Roberto Yin, Yawei Akella, Venkatesh
Abstract	This paper discusses the architecture and performance studies of Datacenter Optical Switch (DOS) designed for scalable and high-throughput interconnections within a data center. DOS exploits wavelength routing characteristics of a switch fabric based on an Arrayed Waveguide Grating Router (AWGR) that allows contention resolution in the wavelength domain. Simulation results indicate that DOS exhibits lower latency and higher throughput even at high input loads compared with electronic switches or previously proposed optical switch architectures such as OSMOSIS [4, 5] and Data Vortex [6, 7]. Such characteristics, together with very high port count on a single switch fabric make DOS attractive for data center applications where the traffic patterns are known to be bursty with high temporary peaks [13]. DOS exploits the unique characteristics of the AWGR fabric to reduce the delay and complexity of arbitration. We present a detailed analysis of DOS using a cycle-accurate network simulator. The results show that the latency of DOS is almost independent of the number of input ports and does not saturate even at very high (approx 90%) input load. Furthermore, we show that even with 2 to 4 wavelengths, the performance of DOS is significantly better than an electrical switch network based on state-of-the-art flattened butterfly topology.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISBN	9781450303798
DOI	10.1145/1872007.1872037
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2010-10-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Data center networks Low latency optical switches Awgr
Content Type	Text
Resource Type	Article

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