HP Global Workload Manager 7.0 User Guide

Common uses for gWLM
gWLM is a powerful tool that allows you to manage your systems in numerous ways. The following
sections explain some of the more common tasks that gWLM can do for you.
Fixing the amount of CPU resources a workload gets
gWLM allows you to give a workload a fixed amount of CPU resources. This fixed amount is in
the form of a set amount of CPU resources given to an npar, a vpar, a virtual machine, a pset, or
an fss group.
To fix the amount of CPU resources a workload gets, use a fixed policy provided by gWLM or
create your own. Associate a fixed policy with a workload:
• When creating an SRD, as described in “Getting started with gWLM” (page 15)
• When adding a workload to an SRD, as described in “Adding a new compartment or GiCAP
group member to an SRD” (page 21)
• By changing the policy associated with an existing workload, as described in “Changing
which policy is associated with a workload” (page 21)
Resizing a workload’s npar, vpar, virtual machine, pset, or fss group as needed
To ensure a workload gets the CPU resources it needs—while also allowing resource sharing when
possible—gWLM provides OwnBorrow policies.
With such a policy, you indicate the amount of CPU resources a workload should own. The workload
is then allocated this owned amount of CPU resources—when it needs it. However, you can
configure the workload to:
• Lend CPU resources to other workloads when it is idle
• Borrow CPU resources from workloads that are idle
Associate an OwnBorrow policy with a workload:
• When creating an SRD, as described in “Getting started with gWLM” (page 15)
• When adding a workload to an SRD, as described in “Adding a new compartment or GiCAP
group member to an SRD” (page 21)
• By changing the policy associated with an existing workload, as described in “Changing
which policy is associated with a workload” (page 21)
gWLM’s utilization policies also allow resizing.
Common configuration tasks
This section discusses various configuration tasks:
• “Changing from advisory mode to managed mode” (page 19)
• “Creating a new policy” (page 20)
• “Editing a policy” (page 20)
• “Changing which policy is associated with a workload” (page 21)
• “Adding a new compartment or GiCAP group member to an SRD” (page 21)
• “Stop managing a workload” (page 22)
• “Stop managing an SRD” (page 22)
Setting up gWLM (initial setup steps)
Several of the configuration tasks require the same initial set-up steps. (Each task requiring these
steps indicates that the steps are needed.) These steps are given below.
18 Configuring gWLM to manage workloads