Doug Fuerst <[EMAIL PROTECTED]> 7/27/2005 12:27 PM
[...]
I agree, I just don't know. But wouldn't the MPP folks have to have beaten the inter-CPU overhead thing? All MVS performance classes inferred that there was a limit to the efficiency of adding another processor, but I now assume it must only be an MVS limitation. In reality, we are debating the 16 processor to 54 processor question, the scientific people are building these 512 or 1024 processor complexes based sometimes on Intel Pentiums.
We're wondering about 54 CPUs in context of multi-processor limitations. 1. Usually mainframe machines have more than 1 LPAR defined, so the number of CPs can be divided.
2. (more important) Let's look at other computers. It is good to look at powerful Unix machines, CPU-power comparable: Sun, IBM and HP offers really different number of CPs. The machines were considered as equivalent by solution provider, who wasn't biased by any of HW suppliers. It was Oracle based solution. Obviously it depends on application, number of concurrent users (good for multi CPU), OS behavior, etc. However the conclusion is obvious: others already did it. Machines for business, not engeneering computations.
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