Change Lpar Group Controls - Group Absolute Capping; Operating System Communication - IBM z13s Technical Manual

A group name, processor capping value, and partition membership are specified at HW
console:
Set an absolute capacity cap by CPU type on a group of LPARs.
Allows each of the partitions to consume capacity up to their individual limits as long as
the group's aggregate consumption does not exceed the group absolute capacity limit.
Includes updated SysEvent Query Virtual Server (QVS) support (used by vendors who
implement software pricing).
Only shared partitions managed in these groups.
Can specify caps for one or more processor types in the group.
Specified in absolute processor capacity (for example, 2.5 processors).
Use Change LPAR Group Controls (same windows that are used for software group
defined capacity. Figure 11-13 shows a window on a z13.
Figure 11-13 Change LPAR Group Controls - Group absolute capping
Absolute capping is specified as an absolute number of processors to cap the group's activity
to. The value is specified to hundredths of a processor (for example, 4.56 processors) worth
of capacity.
The value is not tied to the LICCC. Any value from 0.01 to 255.00 can be specified. This
makes the profiles more portable and means you will not have issues in the future when
profiles are migrated to new machines.
Although the absolute cap can be specified to hundredths of a processor, the exact amount
might not be that precise. The same factors that influence the "machine capacity" influence
the precision to which the absolute capping actually works.

11.5.3 Operating system communication

The Operating System Messages task displays messages from an LPAR. You also can enter
operating system commands and interact with the system. This task is especially valuable for
entering Coupling Facility Control Code (CFCC) commands.
The HMC also provides integrated 3270 and ASCII consoles. These consoles allow an
operating system to be accessed without requiring other network or network devices, such as
TCP/IP or control units.
Chapter 11. Hardware Management Console and Support Elements
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