Save Money, Save The Planet - InformationWeek

InformationWeek is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

IoT
IoT
Software
News
4/29/2009
05:45 PM
Joe Hernick
Joe Hernick
Features
Connect Directly
Twitter
LinkedIn
RSS
E-Mail
50%
50%

Save Money, Save The Planet

With virtualization, both kinds of green are in play.

InformationWeek Green - May 4, 2009 InformationWeek Green
Download the entire InformationWeek "green" issue,
our May 4 magazine distributed solely in pdf form.
(Registration required.)
We will plant a tree
for each of the first 5,000 downloads.

Want to fight global warming? Try virtualization.

The biggest marketing trumpet for virtualization has been monetary savings--physical-to-virtual conversions reduce capital expense by consolidating many servers onto fewer hosts. Additional potential savings can come from reduced management costs, less downtime, and lighter staffing.

As energy prices have fluctuated widely during the past year, CFOs are punching new holes to tighten corporate belts ever further, looking for savings wherever they can. Power and heating and cooling costs are surfacing as areas of opportunity.

That's all good for a company's bottom line. But in addition to freeing up floor and rack space, large-scale server virtualization can result in significant reductions in electrical and cooling needs. And since most of our power comes from burning fossil fuels, it's safe to say that each server is responsible for tons of carbon dioxide annually. General assessments are 4 to 12 tons of CO2 per server per year. Are swimming polar bears starting to haunt you yet?

The stats associated with virtualization vary widely, depending on who's making the pitch. For example, Oriel Technologies, an Australian VMware channel partner, proposes that paring 45 servers down to five host servers through virtualization can keep 506 tons of carbon dioxide out of the atmosphere.

I have a hard time visualizing 506 tons of CO2, so Oriel provides equivalents: planting 2,228 trees, offsetting the annual emissions of 113 cars, or, because they're Australian and it's humorous (and true), offsetting the annual emissions of 219 cows.

Whatever your view on the IT benefits of virtualization or whether you want to argue with the specifics of the assumptions in these estimates, it's tough to argue with the basic premise: Virtualization yields fewer physical servers in your data center. No matter what virtualization host platform you choose, fewer boxes equals less electricity consumed. Less electricity consumed equals fewer emissions.

VMware has taking green savings one step further. Distributed Power Management (DPM) is a new feature of its Distributed Resource Scheduler (DRS) module of ESX (and soon to be part of vSphere.) Relying on VMotion and DRS, VMware clusters can selectively shut down physical hosts as load requirements decrease, further consolidating running virtual machines to a subset of hosts. As loads ratchet up again, offline hosts power back up via wake-on-LAN, and VMs redistribute as more capacity is required. VMware projects an additional 20% power and cooling savings thanks to DPM.

Return to the story:
Rolling Review Wrap-Up: Server Virtualization

Continue to the sidebar:
Our Virtual Test Drives

We welcome your comments on this topic on our social media channels, or [contact us directly] with questions about the site.
Comment  | 
Print  | 
More Insights
Commentary
2021 Outlook: Tackling Cloud Transformation Choices
Joao-Pierre S. Ruth, Senior Writer,  1/4/2021
News
Enterprise IT Leaders Face Two Paths to AI
Jessica Davis, Senior Editor, Enterprise Apps,  12/23/2020
Slideshows
10 IT Trends to Watch for in 2021
Cynthia Harvey, Freelance Journalist, InformationWeek,  12/22/2020
White Papers
Register for InformationWeek Newsletters
The State of Cloud Computing - Fall 2020
The State of Cloud Computing - Fall 2020
Download this report to compare how cloud usage and spending patterns have changed in 2020, and how respondents think they'll evolve over the next two years.
Video
Current Issue
2021 Top Enterprise IT Trends
We've identified the key trends that are poised to impact the IT landscape in 2021. Find out why they're important and how they will affect you.
Slideshows
Flash Poll