HP-UX Workload Manager User's Guide

Introduction
What is HP-UX Workload Manager?
Chapter 144
over SLOs with a lower priority. Once configured, WLM then
automatically manages CPU resources to satisfy the SLOs for the
workloads. In addition, you can integrate WLM with HP Serviceguard to
allocate resources in a failover situation according to defined priorities
(for more information on integrating with HP Serviceguard, see
“Integrating with Serviceguard” on page 414).
Workload management within a single HP-UX
instance
You can also use WLM to manage workloads to divide resources within a
single HP-UX instance by managing workloads based on Fair Share
Scheduler (FSS) groups or processor sets (PSETs). Such workloads are
usually referred to as workload groups.
NOTE The term workload is used in this document to refer to any collection of
processes running in a PSET, FSS group, nPartition, virtual partition, or
Integrity VM host that are managed as a single unit. The term workload
group pertains specifically to FSS or PSET-based groups. However, in
WLM interfaces (such as the WLM configuration wizard or wlminfo
displays), the term workload group is often used for both workload and
workload groups.
When you configure WLM, you define workload groups for the system or
partition and assign processes to the groups based on the specific
applications, users, or Unix groups the processes run under. You can also
create your own criteria for placing application processes in specified
workload groups by defining process maps. In a process map, you map
a group to a script or command and its arguments that gathers process
IDs and causes the identified processes to be placed in that group. WLM
spawns the command or script at 30-second intervals, and at each
interval, places the identified processes in the appropriate groups. In
addition, the WLM SAP Toolkit, in conjunction with HP Serviceguard
Extension for SAP (SGeSAP), takes advantage of process maps,
providing a script that enables you to place specified SAP processes in
specific workload groups managed by WLM. For more information, see
“Integrating with SAP software” on page 438.