eprintid: 10080351
rev_number: 18
eprint_status: archive
userid: 608
dir: disk0/10/08/03/51
datestamp: 2019-08-22 11:46:20
lastmod: 2021-09-25 23:19:50
status_changed: 2019-08-22 11:46:20
type: article
metadata_visibility: show
creators_name: Saljoghei, A
creators_name: Yuan, H
creators_name: Mishra, V
creators_name: Enrico, M
creators_name: Parsons, N
creators_name: Kochis, C
creators_name: De Dobbelaere, P
creators_name: Theodoropoulos, D
creators_name: Pnevmatikatos, D
creators_name: Syrivelis, D
creators_name: Reale, A
creators_name: Hayashi, T
creators_name: Nakanishi, T
creators_name: Zervas, G
title: MCF-SMF Hybrid Low-Latency Circuit-Switched Optical Network for Disaggregated Data Centers
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
keywords: Data center networks, Multi Core Fiber,
Network topology, disaggregated data center, optical
interconnects, optical circuit switching
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: This paper proposes and experimentally evaluates a
fully developed novel architecture with purpose built low latency
communication protocols for next generation disaggregated data
centers (DDCs). In order to accommodate for capacity and
latency needs of disaggregated IT elements (i.e. CPU, memory),
this architecture makes use of a low latency and high capacity
circuit switched optical network for interconnecting various endpoints, that are equipped with multi-channel Silicon photonic
based integrated transceivers. In a move to further decrease the
perceived latency between various disaggregated IT elements,
this paper proposes a) a novel network topology, which cuts
down the latency over the optical network by 34% while
enhancing system scalability and b) channel bonding over multicore fiber (MCF) switched links to reduce head to tail latency
and in turn increase sustained memory bandwidth for
disaggregated remote memory. Furthermore, to reduce power
consumption and enhance space efficiency, the integration of
novel multi core fiber (MCF) based transceivers, fibers and
optical switches are proposed and experimentally validated at the
physical layer for this topology. It is shown that the integration of
MCF based subsystems in this topology can bring about an
improvement in energy efficiency of the optical switching layer
which is above 60%. Finally, the performance of this proposed
architecture and topology is evaluated experimentally at the
application layer where the perceived memory throughput for
accessing remote and local resources is measured and compared
using electrical circuit and packet switching. The results also
highlight a multi fold increase in application perceived memory
throughput over the proposed DDC topology by utilization and
bonding of multiple optical channels to interconnect
disaggregated IT elements that can be carried over MCF links.
date: 2019-08-15
date_type: published
official_url: https://doi.org/10.1109/JLT.2019.2920354
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1681874
doi: 10.1109/JLT.2019.2920354
lyricists_name: Mishra, Vaibhawa
lyricists_name: Yuan, Hui
lyricists_name: Zervas, Georgios
lyricists_id: VMISH38
lyricists_id: HYUAN91
lyricists_id: GZERV41
actors_name: Austen, Jennifer
actors_id: JAUST66
actors_role: owner
full_text_status: public
publication: Journal of Lightwave Technology
volume: 37
number: 16
pagerange: 4017-4029
issn: 1558-2213
citation:        Saljoghei, A;    Yuan, H;    Mishra, V;    Enrico, M;    Parsons, N;    Kochis, C;    De Dobbelaere, P;                             ... Zervas, G; + view all <#>        Saljoghei, A;  Yuan, H;  Mishra, V;  Enrico, M;  Parsons, N;  Kochis, C;  De Dobbelaere, P;  Theodoropoulos, D;  Pnevmatikatos, D;  Syrivelis, D;  Reale, A;  Hayashi, T;  Nakanishi, T;  Zervas, G;   - view fewer <#>    (2019)    MCF-SMF Hybrid Low-Latency Circuit-Switched Optical Network for Disaggregated Data Centers.                   Journal of Lightwave Technology , 37  (16)   pp. 4017-4029.    10.1109/JLT.2019.2920354 <https://doi.org/10.1109/JLT.2019.2920354>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10080351/1/Yuan%20AAM%20JLT-accepted.pdf