---- Joe Landman <[EMAIL PROTECTED]> wrote: > Mark Hahn wrote: > > there's a company, ScaleMP, which seems to be selling some kind of kit > > which enables to fairly large shared-memory x86_64 systems. > > their website is nearly useless (http://www.scalemp.com/), but a little > > more info can be had from SGI, which apparently uses ScaleMP for their > > f1200 product (rebadged Ciara?). > > > > they claim to support up to 32 sockets, 512GB memory. "Versatile SMP". > > The signage at SC07 claimed up to 1 TB ram. Works with Intel and AMD. > > > SGI seems to aim it purely at structural/cfd/crash sims - mainly using > > Abaqus and related tools. > > Yup. Big single memory/system image machines. > > > as far as I can tell, the 32s configuration is 4x 8-socket boxes, > > each with 7x 1 Gb links to their peers. seems to claim that it runs > > unmodified rh/fc/suse systems. marketing docs claim that the secret > > sauce is bios firmware, and mention that "at least 10%" of the memory > > Yup. This is about right. > > > is "reserved" for system cache. I'm not sure how the bios is involved, > > but it sounds like a pretty generic network-shared-memory system, > > which would be OK for uncontended pages, but would thrash once procs > > wait for ~80 us to reference a remote page... > > They really want you to use a fast network connection ... think IB or > similar.
Flextronics was showing a small cluster where they had 4 boxes connected by IB and within each box they had 4 systems connected by IB. They were running ScaleMP on it. They had a graph of running Stream on top of the system. They were plotting bandwidth vs. number of cores and it was fairly linear (I didn't get a close look at it). Jeff _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
