IBM z13s, Technical Manual

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IBM z13s Technical Guide
򐂰 The IBM International Passport Advantage Agreement can be downloaded from the
“Learn about Software licensing” website:
ftp://ftp.software.ibm.com/software/passportadvantage/PA_Agreements/PA_Agreemen
t_International_English.pdf
The remainder of this section describes the software licensing options that are available for
the z13s.
7.16.2 Monthly license charge pricing metrics
MLC pricing applies to z/OS, z/VSE, and z/TPF operating systems. Any mix of z/OS, z/VM,
Linux, z/VSE, and z/TPF images is allowed. Charges are based on processor capacity, which
is measured in millions of service units (MSU) per hour.
Charge models
Various Workload License Charges (WLC) pricing structures support two charge models:
򐂰 Variable charges (several pricing metrics):
Variable charges apply to products such as z/OS, z/VSE, z/TPF, DB2, IMS, CICS, and
WebSphere MQ. Several pricing metrics employ the following charge types:
– Full-capacity license charges:
The total number of MSUs of the CPC is used for charging. Full-capacity licensing is
applicable when the CPC of the client is not eligible for subcapacity.
– Subcapacity license charges:
Software charges that are based on the utilization of the logical partitions where the
product is running.
򐂰 Flat charges:
Software products that are licensed under flat charges are not eligible for subcapacity
pricing. There is a single charge for each CPC on the z13s.
Subcapacity license charges
For eligible programs, subcapacity licensing allows software charges that are based on the
measured utilization by logical partitions instead of the total number of MSUs of the CPC.
Subcapacity licensing removes the dependency between the software charges and CPC
(hardware) installed capacity.
Subcapacity licensed products are charged on a monthly basis based on the highest
observed 4-hour rolling average utilization of the logical partitions in which the product runs
(except for products that are licensed by using the select application license charge (SALC)
pricing metric). This type of charge requires measuring the utilization and reporting it to IBM.
The 4-hour rolling average utilization of the logical partition can be limited by a defined
capacity value on the image profile of the partition. This value activates the soft capping
function of the PR/SM, limiting the 4-hour rolling average partition utilization to the defined
capacity value. Soft capping controls the maximum 4-hour rolling average usage (the last
4-hour average value at every 5-minute interval), but does not control the maximum
instantaneous partition use.
Also available is an LPAR group capacity limit, which sets soft capping by PR/SM for a group
of logical partitions running on z/OS.