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Re: DATACENTER: Cooling and Cost Data for Web Hosting Data Centers
At 10:02 AM 12/9/99 -0500, Nathan Stratton wrote:
>On Wed, 8 Dec 1999, Dave Siegel wrote:
>
>> A Cisco 12012 requires 2 -48VDC 60A circuits. 3 6509's require 6 20A
110VAC,
>> and would fit in a single rack. Larger routers require even more current.
>
>No one, (well people without 10s of millions to waste) build to specs like
>that, you just don't see that load in real world distribution. Now sure,
>you may have a rack or two that is sucking that many amps. I normally
>build out a smaller circuit per rack and then if needed add more power
>rack by rack if needed. but most of the time it is just not needed.
>
>> I'm not a web server guy, but I'd imagine that 32 1RU PII's would consume
>> a fair amount of current oo.
>>
>> 100A/rack seems like a reasonable specification. It's cheaper to install
>> lots of power at the offset than it is to retrofit and run additional
>> power case by case after the facility is opened.
>
>Well numbers like that get expensive fast, you get into very expensive
>requirements and need to take your voltage WAY up just to be able to work
>with it.
>
>> Dave
I'm a believer in that you won't know until you see some rack face
elevations, actually. If you fill a rack with 20 cisco 2511's
or 2 6509's, the power requirements are hugely different. You
just don't know.
Perhaps 100A -averaged- is too high.
-M
Regards,
--
Martin Hannigan [email protected]
Senior Network Engineer P: 617.788.0965
CO Space Services, LLC F: 617.788.0999
Somerville, MA Page: [email protected]