IBM System z Software Pricing

Sub-Capacity Corner

Sub-Capacity Corner

The Sub-Capacity Corner is the place to learn more about the licensing and pricing rules concerning System z Sub-Capacity charges. In addition to an explanation of the contractual terms and conditions there are also different procedures to follow for certain circumstances (such as machine upgrades) and some information about the technology which forms the basis for the Sub-Capacity licensing rules.

Procedures for running SCRT and submitting Sub-Capacity Reports

How to Update the NO89 DD section in the SCRT JCL

The SCRT JCL contains a NO89 DD section which lists the sub-capacity eligible MLC programs and IPLA Execution-based programs which do not create SMF89 or SCRT89 records. Customers must modify each entry in the NO89 DD section to indicate the name(s) of the LPAR(s) where that program ran at any time during the reporting period, or use the keywords *NONE or *ALL as appropriate. Only the MLC programs and IPLA Execution-based programs included by IBM in the NO89 DD section are supported by the SCRT release which came with that release of the JCL. If new NO89 programs are announced it will be necessary to download a new release of SCRT to support them, it is not possible to manually add new product ids into the old JCL without updating the release of SCRT. Products which are supported with SMF89 or SCRT89 data records cannot be added into the NO89 DD section.

It is also not necessary and not possible to add the product ids of any IPLA z/OS-based or IPLA Reference-based programs into the NO89 DD section in order to cause them to be reported by SCRT. It is also not possible to delete individual product ids from the NO89 DD section, although z/OS customers who do not run z/VSE may delete the entire set of z/VSE NO89 product ids if they wish.

How to Submit Sub-Capacity Reports

Sub-Capacity Reports may be submitted in one of two ways: via the web or via email. Sub-Capacity customers should submit their SCRT report(s) via the Internet submission procedures described on the SCRT Submit page and the SCRT Country page.

The following file formats are acceptable:

.csv - Comma Separated Values format

.txt - Plain Text file in CSV format

Unless you have been informed otherwise, all Sub-Capacity customers in countries where the License Management Support (LMS) application has been implemented must use LMS to submit your sub-capacity reports to IBM. You may choose either of the following methods to send your sub-capacity report to LMS:

  • LMS Web to upload and submit your sub-capacity report using the LMS Web interface.
  • LMS eMail to send your sub-capacity report to LMS as an e-mail attachment.

In countries or regions where LMS has not yet been implemented customers will continue to use their current e-mail submission process until notified by IBM that they must migrate to LMS. For submitting Sub-Capacity Reports via email, please use the appropriate email address for your country or region. Send each report as a separate file attached to the email.

When to Submit Sub-Capacity Reports

Sub-Capacity Reports, whether submitted via email or via the web, must be submitted to IBM by the close of business of the 9th day of the month. The billable MSUs listed in the Product Summary Section of the Sub-Capacity Report affect customer billing the month after the report is received. Failure to submit a Sub-Capacity Report for a given month will result in one month of Full-Capacity charges for that machine.

For example, if you are collecting data from January 2nd - February 1st, then your submission deadline for this reporting period (January 2nd through February 1st) is February 9th. The billable MSUs listed in this Sub-Capacity Report will be used to establish the billing, effective March 1st for the month of March. In this case, if the January 2nd - February 1st Sub-Capacity Report is not received by IBM by February 9th, then the billable MSUs for March would be based upon the full MSU rated capacity of the machine. Full-machine billing would continue until the next Sub-Capacity Report is submitted.

Handling Sub-Capacity Reports for a Machine Model Upgrade or Downgrade

The Sub-Capacity contract terms require that a customer notify IBM about any machine upgrade or downgrade at the time it happens. Customers must not wait until the next time they submit their SCRT Report to notify IBM about the change to the machine. If IBM is not properly notified at the time when the change happens the next invoice may be incorrect.

Machine model changes (when the machine type and serial are not changed) are handled by the Sub-Capacity Reporting Tool (SCRT) without any intervention. The Sub-Capacity Report will indicate with a comment that the machine model has changed, and the MSU values on the report will be the peaks seen for that entire reporting period. For machine model upgrades the MSU values on the report will be used to set the billing as usual. But this means that for machine model downgrades the billing cannot be handled correctly without notification to IBM prior to the submission of the Sub-Capacity Report. Since SCRT will report the highest machine model and MSU value seen during the reporting period, without notification to IBM about the model downgrade the higher MSU values from before the downgrade would be the ones billed which could be in excess of the full capacity of the downgraded machine.

Handling Sub-Capacity Reports for a Machine Migration or Replacement

IBM contract terms require that a customer notify IBM about the migration of all licenses from one machine to another at the time it happens. Customers must not wait until the next time they submit their SCRT Report to notify IBM about the movement of software licenses. If IBM is not properly notified at the time the migration happens the next invoice may be incorrect.

When the machine type and/or the serial number changes there will be two Sub-Capacity Reports generated. SCRT will interpret the data as being from two different machines even though the data represents only one customer workload for the month. The customer must submit both Sub-Capacity Reports and must indicate in the "Customer Comments" field of each Report both Sub-Capacity Reports that a migration has occurred, for example, "2097-12345 has migrated to 2828-34567". IBM will check to see that the Data Collection % on the first Report plus the Data Collection % on the second Report sum to 95% or more. For each product appearing on both Reports, IBM will use the higher of the two MSU numbers reported as the billing value for that product that month (capped, if appropriate, by the Full-Capacity MSU value of the target machine). Customers must complete the migration within a calendar month. The original box should no longer be installed or functional in future months.

Handling Sub-Capacity Reports for Machine Consolidations

The case when one or more machines are consolidated onto a different machine is similar to the Machine Upgrade scenario in some respects. For example, with a Consolidation from Box1 and Box2 onto Box3:

Customers must complete the consolidation to Box3 within a calendar month, Box1 and Box2 should no longer be installed or functional in future months.


Example Reports from Reporting Period Prior to the Consolidation
Product Report One
2097-11111
Report Two
2097-22222
No Report for
2817-33333
z/OS 100 50 --
DB2 98 46 --
CICS 87 49 --

Using the example Sub-Capacity Reports from the month before the consolidation, the applied rules would render the following billing the month after the consolidation:

z/OS = 100+50 = 150
DB2 = 98+46 = 144
CICS = 87+49 = 136
Applied to machine serial 2817-33333


Example Reports from Reporting Period Of the Consolidation
Product Report One
2097-11111
Report Two
2097-22222
Report Three
2817-33333
z/OS 100 50 155
DB2 97 47 135
CICS 88 48 125

Using the example Sub-Capacity Reports from the month of the consolidation, the applied rules would render the following billing the second month after the consolidation:

z/OS = (100+50) vs. 155= 155
DB2 = (97+47) vs. 135 = 144
CICS = (88+48) vs. 125 = 136
Applied to machine serial 2817-33333

Getting Help

For help with the Sub-Capacity Reporting Tool (SCRT) or questions related to Sub-Capacity pricing, please see the System z Software Pricing Help page.






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