[rescue] advice on rescuing an e10k

Patrick Finnegan pat at computer-refuge.org
Wed Oct 25 21:50:28 CDT 2006

On Wednesday 25 October 2006 17:19, Sridhar Ayengar wrote:
> Andrew Weiss wrote:
> > On Oct 25, 2006, at 3:47 PM, Ethan O'Toole wrote:
> >>> This doesn't count at all.  This is basically a fancy Beowulf
> >>> cluster in a few cabinets... the XD1 is an Opteron box which for
> >>> arch compatibility is x86.
> >>> If you were talking about either the Cray XT3 or X1E (UNICOS/mp
> >>> UNICOS/lc) then you'd have something.
> >>> Andrew
> >>
> >>
> >> Single Image, Linux... but they cluster them too.
> >
> > I believe that fits into the category of the Alpha/Itanium group
> > that was an exception to the rule.
> How about the IBM Blue Gene/L?

A BG/L is a cluster of dual proc PPC machines with way too little memory 
per processor (512MB/processor pair IIRC), and a few (3 if memory serves 
correctly) different interconnect networks sticking the nodes together.  
It's not really a single-system-image architecure, at all.

Neat, but hard to use, and not a good match for many HPC applications.  
Except for linpack, of course, which I'm convinced is what IBM really 
built it for.

However, the fact that they can shove over 1000 processors in a single 
CPU rack is pretty cool.

Purdue University ITAP/RCAC       --- http://www.rcac.purdue.edu/
The Computer Refuge               --- http://computer-refuge.org

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