research-article

Sirius: A Flat Datacenter Network with Nanosecond Optical Switching

Authors:

Hitesh Ballani,

Raphael Behrendt,

Daniel Cletheroe,

Krzysztof Jozwik,

Fotini Karinou,

Benn Thomsen, and

Hugh WilliamsAuthors Info & Claims

SIGCOMM '20: Proceedings of the Annual conference of the ACM Special Interest Group on Data Communication on the applications, technologies, architectures, and protocols for computer communication

July 2020

Pages 782 - 797

https://doi.org/10.1145/3387514.3406221

Published: 30 July 2020 Publication History

Abstract

The increasing gap between the growth of datacenter traffic and electrical switch capacity is expected to worsen due to the slowdown of Moore's law, motivating the need for a new switching technology for the post-Moore's law era that can meet the increasingly stringent requirements of hardware-driven cloud workloads. We propose Sirius, an optically-switched network for datacenters providing the abstraction of a single, high-radix switch that can connect thousands of nodes---racks or servers---in a datacenter while achieving nanosecond-granularity reconfiguration. At its core, Sirius uses a combination of tunable lasers and simple, passive gratings that route light based on its wavelength. Sirius' switching technology and topology is tightly codesigned with its routing and scheduling and with novel congestion-control and time-synchronization mechanisms to achieve a scalable yet flat network that can offer high bandwidth and very low end-to-end latency. Through a small-scale prototype using a custom tunable laser chip that can tune in less than 912 ps, we demonstrate 3.84 ns end-to-end reconfiguration atop 50 Gbps channels. Through large-scale simulations, we show that Sirius can approximate the performance of an ideal, electrically-switched non-blocking network with up to 74-77% lower power.

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Taka HInoue TOki E(2024)Design model of a twisted and folded Clos network with multi-step grouped intermediate switches guaranteeing admissible blocking probabilityJournal of Optical Communications and Networking10.1364/JOCN.51389816:3(328)Online publication date: 21-Feb-2024
https://doi.org/10.1364/JOCN.513898
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De Marchi FBai WLi JXia Y(2024)Rethinking Transport Protocols for Reconfigurable Data Centers: An Empirical StudyProceedings of the 1st SIGCOMM Workshop on Hot Topics in Optical Technologies and Applications in Networking10.1145/3672201.3674120(7-13)Online publication date: 4-Aug-2024
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Index Terms

Sirius: A Flat Datacenter Network with Nanosecond Optical Switching
1. Networks

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SIGCOMM '20: Proceedings of the Annual conference of the ACM Special Interest Group on Data Communication on the applications, technologies, architectures, and protocols for computer communication

July 2020

814 pages

ISBN:9781450379557

DOI:10.1145/3387514

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https://doi.org/10.1364/JOCN.513898
Zhang SXue XGuo BLi YLi WShen SQian HYin XWei BYuan GTang XHuang S(2024)Fast-tunable Graphene-based AWGR for Deep Learning Training NetworksProceedings of the 1st SIGCOMM Workshop on Hot Topics in Optical Technologies and Applications in Networking10.1145/3672201.3674121(14-20)Online publication date: 4-Aug-2024
https://dl.acm.org/doi/10.1145/3672201.3674121
De Marchi FBai WLi JXia Y(2024)Rethinking Transport Protocols for Reconfigurable Data Centers: An Empirical StudyProceedings of the 1st SIGCOMM Workshop on Hot Topics in Optical Technologies and Applications in Networking10.1145/3672201.3674120(7-13)Online publication date: 4-Aug-2024
https://dl.acm.org/doi/10.1145/3672201.3674120
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Yan FDeng XYuan CYan BXie C(2024)On the Performance Investigation of a Recursive Fast Optical Switch-Based High Performance Computing Network ArchitectureIEEE/ACM Transactions on Networking10.1109/TNET.2023.330265032:1(777-790)Online publication date: Feb-2024
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Wang LZheng MNie JSun QYin ZZhang HYang ZSun ZXiao RLi MZhang YDu YDu LFang TWang FLiu YChen X(2024)Optical Circuit Switching Using REC-DFB Laser ArrayJournal of Lightwave Technology10.1109/JLT.2023.334516242:8(2880-2886)Online publication date: 15-Apr-2024
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Ko HKim BKim YPack S(2024)Two-Phase Split Computing Framework in Edge–Cloud ContinuumIEEE Internet of Things Journal10.1109/JIOT.2024.337697711:12(21741-21749)Online publication date: 15-Jun-2024
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