Summit uses both cold plates and rear-door heat exchangers. Frontier will use Cray's Shasta cabinet which is all water cooled (no fans at all) and is very high density. I am thinking of the systems after Frontier. Can we continue to use cold plates or at some point does immersion become the only alternative? I am not familiar enough with today's immersion, but I am not sure that it is any more dense or efficient than Summit is. I look at pictures of cyber-currency facilities with immersion tanks that are 3-4 feet high and I see a lot of empty space above them which could be holding more compute.
On Tue, Mar 10, 2020 at 7:01 PM Jörg Saßmannshausen < sassy-w...@sassy.formativ.net> wrote: > Dear all, > > yes, there is a max load of the floor and you really should stick to that, > even though that might open a hole, pardon, a door for a new data centre. > :-) > > There are various way of getting more cooling done. You can use doors > which > are cooled, the already described plates on the CPU, you can basically use > a > large trough and put your nodes in there (the trough is filled with oil, > heat > it up enough and you can fry your chips (not)), you can do that smaller as > Iceotop demonstrated: > https://www.iceotope.com/ > > I guess there are a number of ways you can address the problem. Multi-core > CPUs, like the new AMD ones, might also be a solution as you can get more > cores per area. > > I hope that helps a bit. > > Jörg > > Am Dienstag, 10. März 2020, 20:26:18 GMT schrieb David Mathog: > > On Tue, 10 Mar 2020 15:36:42 -0400 Scott Atchley wrote: > > > To make the exercise even more fun, what is the weight per square foot > > > for > > > immersion systems? Our data centers have a limit of 250 or 500 pounds > > > per > > > square foot. > > > > I am not an architect but... > > > > Aren't there two load values for a floor? The one I think you are > > citing is the amount of weight which can safely be placed in a "small" > > floor area without punching through or causing other localized damage, > > the other is the total weight that can be placed on that floor without > > the building collapsing. If the whole data center is on the ground > > floor sitting right on a concrete slab with no voids beneath it I would > > expect the latter value to be huge and not a real concern, but it might > > be less than (500 pounds per square foot) X (total area) on the 2nd or > > higher floors. > > > > Regards, > > > > David Mathog > > mat...@caltech.edu > > Manager, Sequence Analysis Facility, Biology Division, Caltech > > _______________________________________________ > > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > > To change your subscription (digest mode or unsubscribe) visit > > https://beowulf.org/cgi-bin/mailman/listinfo/beowulf > > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > https://beowulf.org/cgi-bin/mailman/listinfo/beowulf >
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