Virtual network allocation for fault tolerance with bandwidth efficiency in a multi-tenant data center

Yukio Ogawa, Go Hasegawa, Masayuki Murata

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

2 Citations (Scopus)

Abstract

In a multitenant data center, nodes and links of tenants' virtual networks (VNs) share a single component of the physical substrate network (SN). A failure of the single SN component can thereby cause simultaneous failures of multiple nodes and links in a VN, this complex of failures must significantly disrupt the services offered on the VN. In the present paper, we clarify how the fault tolerance of a VN is affected by a SN failure, especially from the perspective of VN allocation in the SN. We propose a VN allocation model for multitenant data centers and formulate a problem that deals with the bandwidth loss in the VN due the SN failure. We conduct numerical simulations with the setting that has 1.7 × 108 bit/s bandwidth demand on each VN. The results show that the bandwidth loss can be reduced to 5.3 × 102 bit/s per VN, but the required bandwidth between physical servers in the SN increases to 1.0 × 109 bit/s per VN when each node in the VN is mapped to an individual physical server. The balance between the bandwidth loss and the required bandwidth between physical servers can be optimized by assigning every four nodes of the VN to each physical server, meaning that we minimize the bandwidth loss without providing too sufficient bandwidth in the core area of the SN.

Original languageEnglish
Title of host publicationProceedings - 2014 IEEE 6th International Conference on Cloud Computing Technology and Science, CloudCom 2014
PublisherIEEE Computer Society
Pages555-562
Number of pages8
EditionFebruary
ISBN (Electronic)9781479940936
DOIs
Publication statusPublished - 2015 Feb 9
Externally publishedYes
Event2014 6th IEEE International Conference on Cloud Computing Technology and Science, CloudCom 2014 - Singapore, Singapore
Duration: 2014 Dec 152014 Dec 18

Publication series

NameProceedings of the International Conference on Cloud Computing Technology and Science, CloudCom
NumberFebruary
Volume2015-February
ISSN (Print)2330-2194
ISSN (Electronic)2330-2186

Conference

Conference2014 6th IEEE International Conference on Cloud Computing Technology and Science, CloudCom 2014
Country/TerritorySingapore
CitySingapore
Period14/12/1514/12/18

Keywords

  • Data center
  • Fault tolerance
  • Multiple simultaneous failures
  • Multitenant
  • Virtual network allocation

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Networks and Communications
  • Software
  • Theoretical Computer Science

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