They use TPS as a unit because that's how large banks and other transaction oriented entities do their provisioning and capacity planning. That's their 'unit', not CPU cycles.
There are industry-standard benchmarks that measure TPS. See for example (or maybe not even for example; it may be effectively the only one in town) http://www.tpc.org/information/benchmarks.asp.
And of course, anybody considering buying such a machine will spend quite a bit on evaluating how it performs under their load, just like SPEC (https://www.spec.org/) says something, but not all.
I've looked at the tpc.org maybe 13 years ago. It never made sense to me to use it as a measurement unit back then and it still don't make sense to me now. :)
Because they are not arguing with scientists but with "decision makers". So bullshit is more important than proven facts... Tanksfully, banks are moving slowly out of mainframes. You'll never find a new business going on a mainframe. Mainframes users are captive, not free.
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They use TPS as a unit because that's how large banks and other transaction oriented entities do their provisioning and capacity planning. That's their 'unit', not CPU cycles.
But how can they claim they can do X transactions when a transaction's processing requirement is undefined?
There are industry-standard benchmarks that measure TPS. See for example (or maybe not even for example; it may be effectively the only one in town) http://www.tpc.org/information/benchmarks.asp.
And of course, anybody considering buying such a machine will spend quite a bit on evaluating how it performs under their load, just like SPEC (https://www.spec.org/) says something, but not all.
I've looked at the tpc.org maybe 13 years ago. It never made sense to me to use it as a measurement unit back then and it still don't make sense to me now. :)
Because they are not arguing with scientists but with "decision makers". So bullshit is more important than proven facts... Tanksfully, banks are moving slowly out of mainframes. You'll never find a new business going on a mainframe. Mainframes users are captive, not free.