Installing and Managing HP-UX Virtual Partitions (A.02.01)

Introduction
What Is vPars?
Chapter 120
Why Use vPars?
The following explains some of the advantages of using vPars:
vPars Increases Server Utilization and Isolates OS and
Application Faults
In certain environments one entire server is dedicated to a single
application. When the demand for that application is not at peak, such as
during non-business hours, the server is underutilized. If many servers
are configured this way, you have many servers that are being
underutilized. You can minimize investment and operational costs by
consolidating servers and running multiple applications on one server;
however, this leaves all applications vulnerable to problems if any one
application or their now single OS has problems.
vPars provides asoftware-basedsolution that supports isolating OSs and
their applications within virtual partitions; thus, OS or application
problems in one virtual partition do not affect OSs or applications
running in other partitions.
vPars also allows consolidation of underutilized servers into one faster
server where applications may not be permitted to affect one another,
such as in the case of an ISP running many small e-services application
servers.
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 server.
If you have applications servers that are running different OS versions,
with vPars you can consolidate the application servers into different
virtual partitions on one server, with each virtual 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.