HP-UX Workload Manager User's Guide

Introduction
What is the ideal environment for WLM?
Chapter 1 51
instance of HP-UX and consolidate multiple workloads within that
instance. PRM can be used within, but not across, hard partitions
and virtual partitions.
You can use WLM to manage resource partitions (WLM creates and
manages its own PRM configuration, but PRM must be installed on the
same system). You can also use WLM across both hard partitions and
virtual partitions, automatically moving (virtually) cores among
partitions, based on SLOs in the partitions. You can use WLM to manage
resources within a virtual machine. On an Integrity VM host, you can
use WLM to manage resources across partitions; within an Integrity VM
guest, you can use WLM to manage the HP-UX resources but not using
Instant Capacity, Pay per use (PPU), or virtual partition integration. In
either case, WLM runs as an independent instance. For more
information on running WLM with virtual machines, see “Integrating
with HP Integrity Virtual Machines (Integrity VM)” on page 408.
For information on using WLM across partitions, see Chapter 7,
“Managing SLOs across partitions,” on page 255.
What is the ideal environment for WLM?
You will benefit most from WLM if your environment meets one or more
of the following conditions:
• You run more than one workload concurrently on a server. The
workloads may all run under one instance of HP-UX or in separate
partitions, each with its own instance of HP-UX. These workloads
could be multiple database servers, a database server and an
applications server, or any other combination of workloads, provided
that they are using HP 9000 servers running HP-UX 11i v1, or HP
9000 servers or HP Integrity servers running HP-UX 11i v1, HP-UX
11i v2, or HP-UX 11i v3.
• You have CPU-intensive workloads that can be prioritized.
• You have an important workload with end-user performance
requirements.
• You want consistent performance from applications under varying
application and system loads.