cctalk Digest, Vol 52, Issue 34

[Sridhar Ayengar]

Scott Quinn wrote:
> 
> On Dec 16, 2007, at 11:19 PM, Richard wrote:
> 
>> OK, we talked earlier about how high this architecture could go and
>> there was some mention of 256 and 512 processor systems.  However, I
>> just stumbled across a press release at LANL describing their
>> installation of a massive 6144 processor system consisting of 48 sets
>> of 128 nodes all arranged as a giant supercomputer:
>>
> 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!

Peace...  Sridhar