Re: SMP scalability: 8 -> 32 CPUs

Stephen C. Tweedie (sct@redhat.com)
Mon, 30 Nov 1998 12:03:36 GMT


Hi,

On Sun, 29 Nov 1998 16:45:17 -0500 (GMT), ramak@wipinfo.soft.net
(Ramakrishna K) said:

> Also just a general question from curiosity perspective, is the
> performance of a cluster of these boxes better than a say 1024
> way SMP box. This is assuming we are able to scale it to say 1024
> CPUs. This is vis-a-vis compared to a cluster involving SMP boxes
> ( totally adding upto 1024 CPU's ).

You simply cannot answer a question like that! Let me restate your
question:

"Let's assume that we invent some mechanism for binding 1024
cpus into a single box. I know it doesn't exist yet, but how
fast will it be?"

Binding that many CPUs together is hard! You tell me how you plan to do
it, and _then_ I'll tell you whether clustering is faster. :)

--Stephen

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