On Wednesday, 11/08/2017 at 09:55 GMT, Philipp Kern <p...@philkern.de> wrote: > I thought unused CP capacity was literally costing OpEx whereas IFLs > would be CapEx? If it's both OpEx, then yes, agreed. (And I suppose > originally there might have been deals about giving some IFLs with > upgrades? ;-)
Eh? Processors are processors: CP, IFL, zIIP, CF, whatever. - Processor purchase: CapEx - Processor rental: OpEx - Processor recurring maintenance: OpEx - Software one-time-charge (z/VM): CapEx - OTC software recurring maintenance: OpEx - Monthly software charges (z/OS): OpEx This is why z/OS usage is so carefully monitored and controlled. You can budget a large spike for a capital purchase, but uncontrolled monthly software charges create monthly budget crises. By adding capacity, you increase the software costs. If your software is priced per CPU (z/VM, Linux), then you will know that when you add a CPU, you also need to add money for licenses, and you know exactly what your maintenance bill will be. Over-configured machines typically mean over-paying for your software and wasting money on maintenance charges on something you're not using. If your software is priced based on capacity rather than the number of CPUs, as z/OS is, then you typically look at subcapacity billing models that let you configure your hardware for spikes, but hold the rolling 4-hour average to a lower level. There are mechanisms in z/OS that can be configured to thwart it's natural tendency (common to all OSes) to run as much as it can as fast as it using all the resources at its disposal. No rule applies 100% of the time (except this one), so there can be variations and combinations. Alan Altmark Senior Managing z/VM and Linux Consultant IBM Systems Lab Services IBM Z Delivery Practice ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
