Passive Optical Top-of-Rack Interconnect for Data Center Networks

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MARC

Cheng, YuxinKTH,Optical Network Laboratory (ON Lab) (author)

Passive Optical Top-of-Rack Interconnect for Data Center Networks

BookEnglish2017

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KTH Royal Institute of Technology,2017
31 s.
electronicrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:kth-206421
ISBN:9789177293873
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-206421URI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:vet swepub-contenttype
Subject category:lic swepub-publicationtype

Notes

QC 20170503
Optical networks offering ultra-high capacity and low energy consumption per bit are considered as a good option to handle the rapidly growing traffic volume inside data center (DCs). However, most of the optical interconnect architectures proposed for DCs so far are mainly focused on the aggregation/core tiers of the data center networks (DCNs), while relying on the conventional top-of-rack (ToR) electronic packet switches (EPS) in the access tier. A large number of ToR switches in the current DCNs brings serious scalability limitations due to high cost and power consumption. Thus, it is important to investigate and evaluate new optical interconnects tailored for the access tier of the DCNs.We propose and evaluate a passive optical ToR interconnect (POTORI) architecture for the access tier. The data plane of the POTORI consists mainly of passive components to interconnect the servers within the rack as well as the interfaces toward the aggregation/core tiers. Using the passive components makes it possible to significantly reduce power consumption while achieving high reliability in a cost-efficient way.Meanwhile, our proposed POTORI’s control plane is based on a centralized rack controller, which is responsible for coordinating the communications among the servers in the rack. It can be reconfigured by software-defined networking (SDN) operation. A cycle-based medium access control (MAC) protocol and a dynamic bandwidth allocation (DBA) algorithm are designed for the POTORI to efficiently manage the exchange of control messages and the data transmission inside the rack.Simulation results show that under realistic DC traffic scenarios, the POTORI with the proposed DBA algorithm is able to achieve an average packet delay below 10 μs with the use of fast tunable optical transceivers. Moreover, we further quantify the impact of different network configuration parameters on the average packet delay.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Kommunikationssystem hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Communication Systems hsv//eng
Optical communications
data center interconnects
MAC protocol
dynamic bandwidth allocation.
Informations- och kommunikationsteknik
Information and Communication Technology

Added entries (persons, corporate bodies, meetings, titles ...)

Chen, Jiajia,Associate ProfessorKTH,Optical Network Laboratory (ON Lab)(Swepub:kth)u1at55ic (thesis advisor)
Wosinska, Lena,Professor,1951-KTH,Optical Network Laboratory (ON Lab)(Swepub:kth)u17dm074 (thesis advisor)
Fiorani, Matteo,Dr.KTH,Optical Network Laboratory (ON Lab)(Swepub:kth)u1utq8qt (thesis advisor)
Zhang, Qiong (opponent)
KTHOptical Network Laboratory (ON Lab) (creator_code:org_t)

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