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Growth in Data Centre electricity u se 2005 to 2010. Reviewed by Ricky O’Brien. Trivandrum BUZZ.com. Background to the report. Published August 1 st , 2011, Jonathan Koomey , Ph.D., Professor at Stanford University. Previous reports on this subject include: 2007

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Reviewed by ricky o brien

Growth in Data Centre electricity

use 2005 to 2010

Reviewed by Ricky O’Brien

Trivandrum BUZZ.com


Background to the report
Background to the report

Published August 1st, 2011, Jonathan Koomey, Ph.D., Professor at Stanford University.

Previous reports on this subject include:

2007

‘Estimating regional power consumption by servers: A technical note’ (Koomey)

‘Estimating total power consumption by servers in the U.S. and the world’ (Koomey)

‘Report to Congress on Server and Data Center Energy Efficiency’

(US EPA)

2008

‘Worldwide electricity used in data centers’ (Koomey)


2011 report s main findings
2011 Report’s main findings

  • No ‘doubling in electricity used’ as predicted

    in US EPA 2007 Report

    (owing to lower than predicted server installed base)

  • Increase in electricity used

    - 56% worldwide, 36% US.

  • Data Centre electricity usage

    -1.1%-1.5% of total Worldwide figure

    - 1.7%-2.2% of total US Figure

  • Google electricity usage

    - <1% of all data centre electricity usage worldwide


Figure 1. Predicted US electricity use for data centres from the EPA report to

congress (EPA 2007) and the range estimated in this report (Koomey, 2011)


Figure 2 worldwide electricity use for data centres 2000 2005 and 2010 koomey 2011
Figure 2. Worldwide electricity use for data the EPA report tocentres (2000, 2005, and 2010) (Koomey, 2011)


Figure 3 us electricity use for data centres 2000 2005 and 2010 koomey 2011
Figure 3. US electricity use for data the EPA report tocentres (2000, 2005, and 2010) (Koomey, 2011)


Reasons for lower than predicted electricity use
Reasons for lower than predicted electricity use ? the EPA report to

  • 2008 financial crisis (Economic Downturn)

  • Reduction in server installed base - ‘virtualisation’

  • Virtualisation software

    - multiple operating systems on one server

    - servers more efficient

    - reduces hardware requirements, capital and operational expenses

  • Power Usage Effectiveness (PUE) improved

    - less electricity used per server


Recommended future research
Recommended future research the EPA report to

  • Create a ‘consistent time series’ – 2000

  • 10-30% of servers ‘Orphaned’ – Electricity used per server could be higher

  • Include more server models in future surveys

  • What % of data centre area used for ‘Cloud Computing’ ?


References
References the EPA report to

Koomey, Jonathan (2007a) Estimating regional power consumption by servers: A technical note, Oakland, CA: Analytics Press.

Koomey, Jonathan (2007b) Estimating total power consumption by servers in the U.S. and the world, Oakland, CA: Analytics Press.

Koomey, J., (2008) ‘Worldwide electricity used in data centers’, Environmental Research Letters, 3 (034008), pp 1-8.

Koomey, J., (2011) Growth in data centre electricity use 2005 to 2010, Oakland, CA: Analytics Press.

US EPA. 2007. Report to Congress on Server and Data Center Energy Efficiency, Public

Law 109-431. Prepared for the U.S. Environmental Protection Agency, ENERGY STAR

Program.


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