HP UX 11i Workload Management (gWLM/WLM) Software manual GWLM management model, Srd

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.

•Virtualization Services Platform (VSP)

Virtualization Services Platform is a management platform for creating and managing virtual machines or virtual partitions. Provides both command-line interface and graphical user interface for configuring and managing virtual machines or vPars.

gWLM supports the management of VSPs running HP-UX vPars and Integrity VM 6.3 or earlier.

•HP Integrity Virtual Machines (hpvm)

,ion, 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.

The gWLM management model 9