Installing and Managing HP-UX Virtual Partitions (A.01.01)

Introduction
What Is vPars?
Chapter 1 13
Why Use vPars?
The following explains some of the advantages of using vPars:
vPars Increases Computer Utilization and Isolates OS and
Application Faults
In certain environments one entire computer is dedicated to a single
application. When thedemand for thatapplication is notat peak, such as
during non-business hours, the computer is underutilized. If many
computers are configured this way, you have many computers that are
being underutilized. You can minimize investment and operational costs
by consolidating computers and running multiple applications on one
computer; however, this leaves all applications vulnerable to problems if
any one application or their now single OS has problems.
vPars provides a software-based solution that supports isolating OSs and
their applications within virtual partitions; thus, OS or application
problems in one partition do not affect OSs or applications running in
other partitions.
vPars also allows consolidation of underutilized computers into one
faster computer where applications may not be permitted to affect one
another, such as in the case of an ISP running many small e-services
applications computers.
vPars Provides Flexibility Through Multiple but Independent OS
Instances
vPars offers flexibility by allowing different HP-UX instances, versions,
and patch levels to run on the same computer.
If you have applications computers that are running different OS
versions, with vPars you can consolidate the application computers into
different partitions on one computer, with each partition running its own
OS version.
vPars Provides Flexibility Through Dynamic CPU allocation
vPars allows you to reassign CPUs from one virtual partition to another
without rebooting.
Two partitions that have different CPU utilization peak times can have
processors moved between them. For example, a transaction computer
used primarily during business hours could have floating CPUs