[Beowulf] New Iranian clusters - GPU based ?

[Peter Kjellström]

On Friday, February 25, 2011 04:10:12 pm Hearns, John wrote:
> > > They look the same to me though of course there's no way to
> > > tell if GPUs are in them, but the spacing between them does
> > > seem to imply that they kick out a fair amount of heat..
> > 
> > ...or they spaced them out just so they'd take up more racks and look
> > more impressive.
> 
> There's an Infiniband switch in one of the photos, if I'm not wrong.

Yes, that's an old 288-port (max) Cisco DDR switch. The port count goes quite 
well with the rest (8 racks with 8 chassis of what looks to be 4in2U => 256 
nodes).

The racklayout is also reasonable for an old style open computer room (32 
nodes => ~10KW per rack).

If the 32 1U boxes (also seen) are GPU boxes and the 89TF is total sum then 
(assuming dual socket magnycour) even the FLOPs seem plausible.

Worth noting however is that the cabling seems at best incomplete (some 
chassis not cabled at all, others without IB, ...:

 http://www.mehrnews.com/mehr_media/image/2011/02/623839_orig.jpg

/Friday-bored-out-of-his-mind-Peter
 
-- 
-= Peter Kjellström
-= National Supercomputer Centre
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