HP Global Workload Manager 7.0 User Guide

Seeing how gWLM will perform without affecting the system
gWLM provides an advisory mode that allows you to see how gWLM will approximately respond
to a given SRD configuration—without putting gWLM in charge of your system’s resources. Using
this mode, you can safely gain a better understanding of how gWLM works. In addition, you can
check that your policies behave as expected—with minimal effect on the system.
Advisory mode is not available for SRDs containing virtual machines, psets, or fss groups due to
the nature of these compartments.
Once you are comfortable with an SRD, change its mode to Managed to let gWLM manage
resource allocation for the compartments in the SRD.
For information on changing modes, refer to “Changing from advisory mode to managed mode”
(page 19).
Getting started with gWLM
gWLM is typically accessed through System Insight Manager. For information on the gWLM
command-line interface, see gwlm(1M).
After performing the necessary gWLM daemon (or service) configuration as described in the HP
Matrix Operating Environment Software Installation and Update Guide, the quickest way to start
using gWLM to manage new systems is to use the Manage Systems and Workloads wizard, as
described in the following text.
Before you start the wizard though, decide:
• Which systems you want to manage with gWLM
• Whether you want to manage your workloads by migrating CPU resources among nPars,
vPars, virtual machines, processor sets, or fss groups. (CPU resource migration among nPars
with spare capacity is simulated using the HP Instant Capacity product, as explained in the
section “The gWLM management model” (page 8).)
Tabs and menus
The controls shown in Figure 1 appear at the top of the Global Workload Manager screen.
Figure 1 Top controls of the Global Workload Manager screen
1
The System Insight Manager menu bar
2
The HP Matrix OE visualization tabs
3
The HP Matrix OE visualization menu bar
These menu bars will be referenced later.
Using the wizard
To start the wizard:
NOTE: You must be logged in as root on the systems where you run the mxstart, gwlmcmsd,
and gwlmagent commands mentioned below. In System Insight Manager, you must be logged
in as root or have authorizations for “All Tools” or “Matrix OE All tools.”
1. Configure your CMS as indicated in the HP Matrix Operating Environment Software Installation
and Update Guide if you have not already done so
Seeing how gWLM will perform without affecting the system 15