I agree with Al: it's per machine. After all the per machine calculations
are made, there's a final step before billing: adding up the per machine
peak 4HRAs for any qualifying Sysplexes.

There are some relatively unsurprising conclusions you can draw if you want
to maximize efficiency:

1. Having a respectably small number of machines for the size of your
particular workloads is generally wise. Parsimony is good. These are
mainframes, and that's how they're designed. Said another way, LPARs work.
Use them.

2. Having reasonably even load across your Sysplex is wise. Said another
way, real Sysplexes with real workload sharing get the most Sysplex
benefit. Technically qualifying Sysplexes may only get some benefit. Said
yet another way, take advantage of Sysplex.

Writing only for myself.

- - - - -
Timothy Sipples
Resident Enterprise Architect
Value Creation & Complex Deals Team
IBM Growth Markets (Based in Singapore)
E-Mail: [email protected]
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