HP Global Workload Manager 7.0 User Guide

Mode Two modes are available: advisory and managed. Advisory
mode allows you to see what CPU resource requests gWLM
would make for a workload—without actually affecting
resource allocation.
Advisory mode is not available for SRDs containing virtual
machines, psets, or fss groups due to the nature of these
compartments.
Use this mode when creating and fine-tuning your policies.
Once you are comfortable with your policies, use managed
mode to have gWLM automatically adjust the resource
allocations for your defined workloads.
You can only set the mode on the SRD level. All workloads
within an SRD operate in the same mode, either advisory
or managed.
Deploy Enable gWLM control of an SRD.
Deploying an SRD in managed mode enables gWLM control
of resource allocation within the SRD. For example, in an
SRD based on a vPar that has psets for compartments,
deploying an SRD in managed mode allows gWLM to
actively migrate cores among psets. (A core is the actual
data-processing engine within a processor. A single
processor might have multiple cores.)
When deploying an SRD in advisory mode, gWLM simply
reports what the allocation would be—without actually
affecting resource allocations on a system.
Advisory mode is not available for SRDs containing virtual
machines, psets, or fss groups due to the nature of these
compartments.
Undeploy Disable gWLM’s management of resources in a specified
SRD.
If an SRD is in managed mode, undeploying stops the
migration of system resources among workloads in the SRD.
If the SRD is in advisory mode, gWLM no longer provides
information on what requests would have been made.
The gWLM management model
gWLM enables utility computing across a data center by providing resource-sharing policies that
you centrally create and monitor. gWLM moves resources among the workloads in a shared
resource domain (SRD) as needed—based on the policies you specify.
gWLM allows you to manage resource allocations for several types of system divisions, as discussed
below. These divisions are referred to as compartments in gWLM.
• HP-UX Hardware Partitions (npar)
A hardware partition, also known as an nPartition or npar, is a physical partition of a server,
where each npar runs its own instance of the HP-UX operating system (which can include use
of HP Integrity virtual machines) or is divided into virtual partitions.
Using the HP Instant Capacity product, gWLM simulates the movement of CPU resources
among nPars by turning off an active core in one npar then turning on a deactivated core in
another npar in the same complex. Thus, the first npar has one less active core, while the
second npar has one additional active core. (gWLM maintains the number of active cores,
honoring the Instant Capacity usage rights. As a result, no additional costs are incurred.)
8 Overview