HP Global Workload Manager 7.0 User Guide

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.
For more information on these system divisions, visit:
• HP Matrix Operating Environment website:
http://www.hp.com/go/matrixoe/integrity
• The “Technical Documentation website for HP Matrix Operating Environment” website:
http://www.hp.com/go/matrixoe/docs
• The “Global Workload Manager” topic and the glossary in the online help for gWLM, available
in gWLM’s graphical interface in System Insight Manager.
gWLM manages resources based on the following model:
1. You define an SRD by:
a. Deciding which of your systems you want to manage and what type of compartments
you want to use.
gWLM manages existing nPars, vPars, and virtual machines. It can manage your existing
psets as well as create new ones. It creates fss groups for you.
b. Associating each workload with a compartment.
For nPars, vPars, and virtual machines, the compartment itself defines the workload. For
psets and fss groups, you define the workload based on applications, users, or process
IDs.
c. Associating a policy with the workload indicating how gWLM should allocate resources
to the workload's compartment.
gWLM comes with several policies and also lets you define your own. You can use a
single policy for multiple workloads, minimizing the number of policies, if desired.
2. Once the SRD is deployed:
The gWLM management model 9