Chapter 2. System structure and design 65
Draft Document for Review April 7, 2004 6:15 pm 6947ch02.fm
򐂰Conversion of feature code 0517 to 0516, for conversion of an unassigned IFL to an IFL
򐂰Conversion of feature code 0518 to 0516 or 0716, for conversion of an ICF to an IFL or a
CP
All listed conversions are usually non-disruptive. In exceptional cases the conversion may be
disruptive, e.g. when an IBM 2084 model A08 with eight CPs is converted to an all IFL
system. In addition LPAR disruption may occur when PUs must be freed before they can be
converted.
This information is also summarized in Table2-7.
Table 2-7 PU conversions
Capacity Backup (CBU)
CBUs deliver temporary capacity (feature code 7800) on top of what a customer might have
installed in numbers of assigned CPs, IFLs, ICFs, zAAPs and additional SAPs. The total
number of active PUs (the sum of all assigned CPs, IFLs, ICFs, zAAPs, and additional SAPs)
plus the number of CBUs cannot exceed the total number of PUs available o n the MCMs in all
books.
To determine the number of CBUs that can be added to a given configuration, some rules
must be considered:
The number of assigned CPs + IFLs + ICFs + zAAPs, + add’l SAPs + CBUs =< 8 on an IBM
2084-A08
The number of assigned CPs + IFLs + ICFs + zAAPs, + add’l SAPs + CBUs =< 16 on an IBM
2084-B16
The number of assigned CPs + IFLs + ICFs + zAAPs, + add’l SAPs + CBUs =< 24 on an IBM
3084-C24
The number of assigned CPs + IFLs + ICFs + zAAPs, + add’l SAPs + CBUs =< 32 on an IBM
3084-D32
Unassigned CPs and IFLs are ignored. In fact, they are considered spares and are available
for use as a CBU. When an unassigned CP or IFL is converted into an assigned CP or IFL, or
when additional PUs are characterized as CPs or IFLs, then the number of CBUs that can be
activated is decreased.
Software model MSU values
All software models have an MSU value that is used the determine the software license
charge for all MLC software. Table2-8 shows all MSU values for all software models.
The Mainframe Charter, announced in August 2003, offers lower software charges for
selected IBM software on z990. This price/performance improvement is achieved by lowering
the original established MSU value for each software model by approximately 10% resulting
in a list of software MSU values (Pricing MSUs) to be used for software charging.
To
From CP
(0716) Unassigned
CP (1716) IFL
(0516) Unassigned
IFL (0517) ICF
(0518)
CP (0716) -Yes Ye s No Ye s
Unassigned - CP (1716) Yes - No No No
IFL (0516) Yes No - Yes Yes
Unassigned IFL (0517) No No Yes - No
ICF (0518) Yes No Yes N o -