[103231] in North American Network Operators' Group
Re: rack power question
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Sun Mar 23 11:33:46 2008
Date: Sun, 23 Mar 2008 10:31:06 -0500
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@nanog.org
Mail-Followup-To: nanog@nanog.org
In-Reply-To: <47E5BA49.1050707@zill.net>
Errors-To: owner-nanog@merit.edu
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In a message written on Sat, Mar 22, 2008 at 10:02:49PM -0400, Patrick Giag=
nocavo wrote:
> Are there cases where more than 6000W per rack would be needed?
For a router/switch data points (this is NANOG, after all):
http://www.cisco.com/en/US/prod/collateral/routers/ps5763/prod_brochure0900=
aecd800f8118.pdf
The CRS-1 in 16 slot or fabric chassis configuration takes a full
rack and needs ~11,000W.
6509-E's take dual 6000W power supplies. They are 15U, and I have
seen 3 of them stacked in a 48U cabinet (obviously doesn't work in
a 42U rack). That's 18,000W draw in a single cabinet.
I'm afraid 6000W is on the low end, by today's standards, and some
of the new 1RU multi-system chassis or blade servers can make these
numbers look puny. For instance:
http://www.themis.com/prod/hardware/res-12dcx.htm
Dual quad-core Xeons in a 1RU form factor. 600W power supply. 600W
* 42 =3D 25,200.
What do you expect your customers to bring? How long do you expect
your data center to last? Not that long ago people were building
5000W/rack data centers; often those places today have large empty
spaces, but are at their power and/or cooling limits.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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