HP-UX Workload Manager User's Guide

Introduction
WLM and Process Resource Manager (PRM)
Chapter 1 59
WLM and Process Resource Manager (PRM)
When managing PSETs or FSS groups, the Workload Manager (WLM)
and Process Resource Manager (PRM) products both work by modifying
and enabling a PRM configuration. WLM uses PRM when a prm
structure is included in the WLM configuration. With such
configurations, you can use PRM’s informational and monitoring
commands such as prmlist and prmmonitor. You can also use the
prmrun and prmmove commands, among others. If you use the prmconfig
command, invoke it with no options or the -u (unlock) option—do not use
the -r (reset) option.
Ordinarily, WLM and PRM should not be used to manage resources on
the same system at the same time. In some cases, this might cause
inconsistent behavior and undesirable performance. However, you can
use both products at the same time if the PRM configuration uses FSS
groups only (no PSET-based groups) and the WLM configuration is
strictly host-based. A strictly host-based configuration is one that does
not include a prm structure; it is designed exclusively for moving cores
across HP-UX Virtual Partitions or nPartitions, or for activating
Temporary Instant Capacity (TiCAP) cores or Pay per use (PPU) cores.
For information on the advantages of using WLM and PRM
simultaneously, see “Integrating with Process Resource Manager (PRM)”
on page 404.
NOTE As of WLM A.03.01, PRM is no longer included with the bundle. If PRM
C.03.00 or later is already installed on the machine on which you install
or upgrade WLM, you can continue to manage FSS and PSET-based
workload groups just as if PRM had been installed with WLM—when
you purchase WLM, you receive a PRM license that enables you to
continue to use PRM.
If you install WLM for the first time on a machine, you can use a strictly
host-based configuration (no FSS or PSET-based workload groups).
However, to manage FSS or PSET-based workload groups, you must
install PRM (C.03.00 or later) separately.