Paper Info
Title
Sirius: A Flat Datacenter Network with Nanosecond Optical Switching
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.
Year
DOI
Venue
2020
10.1145/3387514.3406221
SIGCOMM '20: Annual conference of the ACM Special Interest Group on Data Communication on the applications, technologies, architectures, and protocols for computer communication Virtual Event USA August, 2020
DocType
ISBN
Citations 
Conference
978-1-4503-7955-7
3
PageRank 
References 
Authors
0.38
31
11
Name
Order
Citations
PageRank
Hitesh Ballani1138663.25
Paolo Costa2164283.39
Raphael Behrendt330.38
Daniel Cletheroe4112.20
Istvan Haller516611.21
Krzysztof Jozwik6192.88
Fotini Karinou765.49
Sophie Lange830.38
Kai Shi975.32
Benn Thomsen10101.18
Hugh Williams11754.58