Optical circuit granularity impact in TCP-dominant hybrid data center networks

Houman Rastegarfar, Kamran Keykhosravi, Krzysztof Szczerba, Erik Agrell, Lloyd J LaComb, Madeleine Glick

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Hybrid networking, based on electronic packet switching and optical circuit switching, has been proposed to resolve the existing switching bottlenecks in data centers in an energy-efficient and cost-effective fashion. We consider the problem of resource provisioning in hybrid data centers in terms of optical circuit switching capacity and granularity. The number of fibers connected to server racks, the number of wavelengths per fiber, and the ratio of capacity provided by the optical circuit-switched portion of the network to that of the electronic packet-switched portion are crucial design parameters to be optimized during the data center planning phase. These parameters in conjunction with the additive-increase, multiplicative-decrease (AIMD) congestion control mechanism of the Transmission Control Protocol (TCP) pose a significant impact on data center network performance. In this paper, we examine the combined impact of optical bandwidth settings and TCP dynamics using event-driven simulations. Our analysis reveals the strong dependence of overall network throughput on channel capacity (i.e., the bit rate per wavelength channel) and points to the advantages of optical bandwidth consolidation employing higher-order modulation formats.

Original languageEnglish (US)
Title of host publication2017 International Conference on Computing, Networking and Communications, ICNC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages318-322
Number of pages5
ISBN (Electronic)9781509045884
DOIs
StatePublished - Mar 10 2017
Event2017 International Conference on Computing, Networking and Communications, ICNC 2017 - Silicon Valley, United States
Duration: Jan 26 2017Jan 29 2017

Other

Other2017 International Conference on Computing, Networking and Communications, ICNC 2017
CountryUnited States
CitySilicon Valley
Period1/26/171/29/17

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Optical circuit granularity impact in TCP-dominant hybrid data center networks'. Together they form a unique fingerprint.

  • Cite this

    Rastegarfar, H., Keykhosravi, K., Szczerba, K., Agrell, E., LaComb, L. J., & Glick, M. (2017). Optical circuit granularity impact in TCP-dominant hybrid data center networks. In 2017 International Conference on Computing, Networking and Communications, ICNC 2017 (pp. 318-322). [7876147] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCNC.2017.7876147