[Beowulf] longevity of 1U servers?
tjrc at sanger.ac.uk
Tue Feb 10 02:55:44 EST 2009
On 10 Feb 2009, at 12:10 am, Bill Broadley wrote:
> Seems like fans are the main problem with 1Us. Pretty much
> efficiency (air
> moved per watt) and noise (air moved per decibel) hugely favor
> larger fans.
> I've seen 1U nodes that waste 30+ watts or so on moving air.
> Seems like a rear door with a few 18" diameter fans could easily
> move more air
> than 40 1U systems with 240 1" fans in them. Seems like large
> savings in
> power and expense could be had by moving the fans to the rack
> doors. I've
> seen blade servers basically do this, alas at a large cost premium.
Exactly. Consider the enormous blowers in an IBM BladeCenter chassis,
there are only two fans for fourteen machines.
Blade servers do save money elsewhere; *generally* they're much
easier to deploy and administer than individual pizza boxes.
At least, they are when the lights out management firmware isn't an
unspeakable crock. Ahem.
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