HP Insight Global Workload Manager 6.0 Software: User Guide

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.)
Combining gWLM A.04.00.07 or later and an appropriate version of the iCAP software,
gWLM's ability to manage npars using iCAP is extended across multiple complexes that are
members of the same Global iCAP group.
• HP-UX Virtual Partitions (vpar)
A virtual partition is a software partition of a server or of a single nPartition, where each
virtual partition runs its own instance of the HP-UX operating system. A virtual partition
cannot span an nPartition boundary.
• HP Integrity Virtual Machines (hpvm)
Virtual machines are a robust soft-partitioning and virtualization technology that provides
operating system isolation, with sub-core allocation granularity and shared I/O. These virtual
machines can run a variety of operating systems. gWLM can manage a virtual machine
regardless of the operating system running inside it.
• HP-UX Processor sets (psets)
A processor set is a collection of cores (formerly known as CPUs) grouped together for the
exclusive access by processes assigned to that processor set. Processor sets form partitions
within a single operating system image.
• HP-UX Fair Share Scheduler groups (fss groups)
A group of processes that has its CPU resource allocation managed by the Fair Share
Scheduler that is available with HP-UX. A benefit of fss groups is their granularity: You can
allocate fractions of CPU resources, rather than only whole cores, to the group of processes.
These groups form partitions within a single operating system image.
10 Overview