Tom Duerbusch writes: > >From a cost perspective, the software companines will charge you for the > >number of IFL engines you have on a box in which you run the software. > > So if you are running HATS on a single IFL box, you get charged for one copy. > If you run HATS on your dual IFL box, you get charged for two copies. > > Same for z/VM, except for VM you also have to include the 390 engines. > > However, some companies have price breaks for multiple CPU systems. VM, for > example, starts getting cheaper for each additional engine after a certain > point. There might be a point with HATS, but I doubt there is any play with > a 2 IFL system.
Fortunately, one of those companies with price breaks is IBM :-) Subcapacity pricing is available under the IBM Passport Advantage scheme (i.e. the "normal" scheme for buying IBM distributed software for Linux on System z) for selected software and z/VM and LPAR on System z are supported virtualisation methods for Linux software under that subcapacity scheme. The place to go for information is http://www-306.ibm.com/software/lotus/passportadvantage/subcaplicensing.html and also the "Linux for System z" presentation linked to on http://www-306.ibm.com/software/lotus/passportadvantage/Counting_Software_licenses_using_specific_virtualization_technologies.html Those give all the details on what software is available with subcapacity pricing and how to count up guest CPUs, LPAR CPUs and physical CPUs and come up with the right number of them you need to license. Basically, it works as you'd hope with a granularity of one engine: the presentation mentioned above has lots of worked examples. When looking around the IBM web site for information on this, I strongly recommend not starting off with searches for "system z" and "sub-capacity" or even "ipla" and "sub-capacity". You'll very probably end up in all the web pages about sub-capacity pricing for z/OS software which is very different. The "Passport Advantage Sub-capacity Licensing List of Eligible Programs" (a PDF document linked to from the page at the first URL I gave) does include some HATS stuff so I think Brian may be in with a chance. --Malcolm -- Malcolm Beattie <[EMAIL PROTECTED]> Linux Technical Consultant and Program Manager IBM Europe, System z
