CrayLink connections between Origin 2000s
ploopster at gmail.com
Tue Dec 18 12:43:12 CST 2007
Pete Turnbull wrote:
> On 18/12/2007 09:57, Joost van de Griek wrote:
>>> Sounds like an ordinary (for SGI types of ordinary) Onyx2. That has
>>> the framebuffer hardware in the upper module, and CPUs in the lower;
>>> one framebuffer module per machine, but up to 7 (IIRC) CPU modules in
>>> multi-rack configurations.
>> Seven CPU modules is unpossible. The (hyper)cube topology nust be
>> maintained, so you can only expand a machine by doubling the number of
>> modules connected together. Powers of two.
> I know we've run odd numbers under fault conditions. Sure, the
> interconnections are sub-optimal, but I don't believe it has to be
> powers of two.
Anyway, there's nothing stopping someone from building a 7-item
hypercube in a tightly curved space. 8-)
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