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McKown, John wrote:
<<SNIP>> The Power6 processor is much more powerful than
the CPU in the z. And the 595, if I'm reading correctly can
have 64 of them. The largest z maxes out at 32 processors
in a single box.

Without a special PTF, a single partition of i5/OS runs on a maximum of 32 processors. I am not sure of the limitations of that expansion with regard to always-on, CUoD, or backup for failed; perhaps the PTF explains what it enables, although I doubt it.

I do not recall any similarly low limitation on z, which enables a variety of additional co-processors, I/O processors, and "specialty engines" as well. Since z offers at least 64 CPU systems, any 32 CPU limit would seem likely to be a partition limit for an OS, similar to for i5/OS.

Regards, Chuck

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