'capacity on demand', it is 'Licensed Internal Code Controlled Configuration.' The use of LIC CC also allows them to offer 'capacity on demand',
Ok, so I got my terminology incorrect for the part that actually controls the hardware license. Other than that I believe my point stands (that Hercules on an inexpensive midrange x86 is faster than the slowest licensed BC12 config). And so your point was?
Why would you pay (for hardware and software) for more performance than you need?
That is not the right question. The question is why I should pay IBM millions of dollars to unlock the hardware I am paying the power bills on, providing the floor space for, and have "purchased". Yes, I know IBM won that lawsuit, but that doesn't mean IBM doesn't come across as the slimiest of business dealings for coming up with such a model. At least when HP rapes you for ink you actually get a product for it, rather than having them just unlock extra ink in the cartridge in your printer.
Especially since I don't actually need the mainframe. All the RAS features i need are available on machines that run Linux faster, for less than $15k, and require me to interact with the CE on a less frequent basis because in our sample of 1 mainframe vs a bunch of HP DL 580's. the HP's are actually more reliable. The HP's haven't needed any service since they were installed, unlike the mainframe which seems to need constant babysitting. Plus, I can spin up new VM's in vmware with a couple clicks of a button vs, screwing around with zVM for days.
So, asking why I should give IBM exorbitant fee's for something I can acquire elsewhere for far less is not the right question. Maybe a better question is why I'm paying hundreds of thousands of dollars for performance that is equivalent to the 20 year old Pentium that is sitting in the junk room next door. Or why I'm maintaining a machine that requires me to manually configure device addresses, and IODF's with text editors, or writing system exits in assembly to do simple things like roll log files or get notification of tape insertions.
Furthermore, if you want to understand where I'm coming from, take a look at the specCPU results in OMVS for a 240 MIP EC12. So, next time I'm sitting there wondering if I should pay IBM a couple thousand dollars to run my job a little faster this weekend, I will remember you asking me why.
So, yah, there is a reason younger people don't want to work on those archaic machines. They don't want to work somewhere that compute time is so carefully guarded, especially since they could just spin up 1000x the compute (and even IO with the SSD instances) performance for a few dollars on EC2.