Open AccessHigh-port low-latency optical switch architecture with optical feed-forward buffering for 256-node disaggregated data centers
Author(s) -
Nikos Terzenidis,
Miltiadis Moralis-Pegios,
George Mourgias-Alexandris,
K. Vyrsokinos,
Nikos Pleros
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.008756
Subject(s) - computer science , computer network , data center , latency (audio) , network packet , wavelength division multiplexing , optical switch , optical burst switching , feed forward , electronic engineering , optical performance monitoring , wavelength , telecommunications , optics , physics , control engineering , engineering
Departing from traditional server-centric data center architectures towards disaggregated systems that can offer increased resource utilization at reduced cost and energy envelopes, the use of high-port switching with highly stringent latency and bandwidth requirements becomes a necessity. We present an optical switch architecture exploiting a hybrid broadcast-and-select/wavelength routing scheme with small-scale optical feedforward buffering. The architecture is experimentally demonstrated at 10Gb/s, reporting error-free performance with a power penalty of <2.5dB. Moreover, network simulations for a 256-node system, revealed low-latency values of only 605nsec, at throughput values reaching 80% when employing 2-packet-size optical buffers, while multi-rack network performance was also investigated.