[Beowulf] Earthquakes and raised floors...

Joel Jaeggli joelja at darkwing.uoregon.edu
Sun Jan 8 21:54:09 EST 2006


On Sun, 8 Jan 2006, Robert G. Brown wrote:

> On Fri, 6 Jan 2006, Greg Lindahl wrote:
>
>> On Fri, Jan 06, 2006 at 02:53:34PM -0500, Robert G. Brown wrote:
>> 
>>> Just to give one more kick to the dying mule, I was googling on out a
>>> bit farther to see if I could locate any really GOOD online resources
>>> for raised floors and earthquakes when I found the following (APC
>>> sponsored) white paper:
>> 
>> So, aside from the fact that APC is selling you something, it's not
>> true for many HPC clusters that the cabling is non-bulky and easy to
>> deal with; overhead wiring is much less flexible.  And the cooling
>> issue is quite significant.
>
> No real argument -- even the APC article acknowledges that cooling
> remains an advantage (although they assert that there are often/usually
> solutions, something that seemed supported by several third party
> cooling system companies that crossreferenced the white paper but sold
> BOTH underfloor and overhead cooling solutions whichever one needed).
> I've never heard anyone say they were particularly happy having to mess
> with cabling running under a raised floor (but have heard plenty of
> griping) but there may be ways of laying it out nowadays that are easy
> (easier) to manage.
>
> However (and this isn't argument or rhetoric either, just a plea for
> enlightenment) -- just what is APC trying to sell with the white paper?
> I know they sell a variety of rackware and power equipment, but what
> have they got against raised floors (specifically, what sales advantage
> do they gain if a client doesn't use a raised floor)?

They make dedicated airhandling units for really hot racks.

They also offer a rather upmarket datacenter design and deployment 
service presumably they have some customers that want or think they want 
raised floors so a white paper that says you don't really need this thing 
that we don't provide seems likely.

Not that I have anything against apc, I've got all sorts of their products 
deployed. but I do take their marketing materials with a grain of salt.

> Curiously yours,
>
>   rgb
>
>> 
>> -- greg
>> 
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>

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Joel Jaeggli  	       Unix Consulting 	       joelja at darkwing.uoregon.edu
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