[Beowulf] Earthquakes and raised floors...

Alvin Starr alvin at iplink.net
Sun Jan 8 15:15:58 PST 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)?
> Curiously yours,
>    rgb

A while back I found the following link about raised floor and growh of 
metal whiskers; http://nepp.nasa.gov/whisker/

I found this AFTER we put in the raised floor for running our cables but 
I guess the upside is that we are not using it for cooling.

Alvin Starr                   ||   voice: (416)585-9971
Interlink Connectivity        ||   fax:   (416)585-9974
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