HP-UX Workload Manager User's Guide

Managing SLOs across partitions
Recommendations, requirements, and restrictions
Chapter 7258
• For managing nPartitions with WLM, you must use Instant Capacity
cores (formerly known as iCOD CPUs). Use the Instant Capacity
versions specified in the WLM Release Notes
(/opt/wlm/share/doc/Rel_Notes).
• If you manage virtual partitions in combination with Instant
Capacity, you must use vPars A.03.01 or later.
• Do not adjust any WLM-managed partition while wlmpard is
running. This includes using vparmodify, icapmodify, or
icod_modify to change the name, configuration, or resources (CPU
and memory) associated with the virtual partition or nPartition. This
also includes using parolrad to perform online cell (Cell OL*)
operations on any cell in a WLM-managed partition. (To check the
status of online cell operations, use the parolrad -m command.) To
adjust a partition or cell, first shut down WLM—including
wlmpard—on all partitions that will be affected by the modification,
then modify the partition. Restart WLM after modifying the
partition. (Changes to Instant Capacity affect the entire complex;
changes to a virtual partition affect the nPartition only, unless
Instant Capacity is configured on the nPartition.) For example, if
WLM is managing two virtual partitions vParA and vParB, and you
need to migrate memory resources from vParA to vParB, you must
shut down WLM in both virtual partitions. As another example, to
change the name of an nPartition, you must first shut down WLM in
every operating system instance across the entire complex, because
the name change affects Instant Capacity, and Instant Capacity
changes affect every nPartition across the complex.
For instructions on how to stop and start the WLM daemons, see
Appendix A, “WLM command reference,” on page 363, or see
wlmd(1M) and wlmpard(1M).
• Do not use cell-specific CPU bindings or user-assigned CPU bindings
on virtual partitions you are going to manage with WLM.
• With Instant Capacity v6 or earlier, do not include spaces in partition
names. Also, if icod_stat or icapstatus truncate the name of an
nPartition, use parmodify to shorten the name so that it is not
truncated.
You can configure WLM to manage FSS and PSET-based workload
groups and partitions (nPartitions or virtual partitions) at the same
time. Certain software restrictions apply to using PSET-based groups