On 17/12/2007 16:16, Sridhar Ayengar wrote:
Scott Quinn wrote:
Above 128
processors you need a special "Cray" router. Above either
512 or 1024 you'll probably need custom SGI setup, possibly a custom
IRIX. At any rate, 32 or 64 processors are pretty fast (remember as
you scale it's harder and harder to get parallel code to run across
all processors), and don't forget to factor in electricity and
cooling. Most hobbyists only run one or two racks.
Do these humongous configurations run a single OS image? If so, cool!
Yes, they do. And it has a little LCD display in the centre of the main
rack that can show you bargraphs of the CPU and system activity, per
processor.
--
Pete Peter Turnbull
Network Manager
University of York