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Introduction
Integrity Virtual Machines is a soft partitioning and virtualization technology that provides operating
system isolation, with sub-CPU al ocation granularity and shared I/O. You can instal Integrity VM on
an Integrity server or hardware partition (nPartition) running HP-UX. The Integrity VM environment
consists of two types of components:
– VM Host
– Virtual machines (also cal ed guests)
The VM Host virtualizes physical processors, memory, and I/O devices, al owing them to be
al ocated as virtual resources to each virtual machine. Al versions of Integrity VM prior to Version 4.0
require the VM Host to run an HP-UX 11i v2 Operating Environment. Version 4.0 is supported only
on hosts running HP-UX 11i v3 Operating Environments.
This document is intended for individuals who are currently deploying Integrity Virtual Machines
Versions 3.x on VM Hosts running HP-UX 11i v2, and who are interested in upgrading to Integrity VM
Version 4.0. This document describes the supported upgrade paths and guidelines for upgrading both
the Integrity VM technology and the HP-UX Operating Environment at the same time. It also highlights
the subtleties and possible pitfal s of performing such an upgrade and how to avoid problems.
This paper assumes that the reader has a good knowledge of the HP-UX operating system and is
familiar with the concepts of Integrity Virtual Machines. The reader is encouraged to refer to the
documentation available at the HP Technical documentation website, http://docs.hp.com/.
Upgrade Process Overview
Upgrading to Integrity VM Version 4.0 provides a substantial number of enhancements (see the HP-UX
11i v3 September 2008 Release Notes, available at http://docs.hp.com), but requires substantial y
more planning than previous upgrades. This is because the underlying Operating Environment must
be updated at the same time. With careful planning and attention to detail, it is possible to minimize
the amount of interruption to the VM Host and virtual machines. Without this planning, it is almost
inevitable to have unnecessary downtime.
Migration Restrictions
Please read through this section before attempting to upgrade your VM Host. Your VM host
environment MUST comply with al of the requirements in the fol owing list:
– Integrity VM Version 4.0 runs only on HP-UX 11i v3, September 2008 (Update 3 Release) or
later.
– No HFS file systems can be mounted.
– The HP SIM CMS software must not be instal ed. (This only affects the Central Management
Server (CMS) software, not the providers and agents instal ed on the managed systems.)
– Virtual Partitions (vPars) must not be instal ed1.
– The operating system configuration and tunables must not be modified beyond that which is
done automatical y by the instal ation of Integrity VM. This includes, but is not limited to:
o
The memory configuration on cell-based servers must be 100% interleaved (ILM).
o
Hyper-threading2 must be turned off.
1 Version 4.0 has both instal -time and run-time checks to make sure that the host is in a supported configuration. The presence of HP-SIM or vPars
wil stop the software from instal ing and/or running.
2 Newer Integrity servers support “hyper-threading”, a way by which a single CPU core functions almost as two cores. This feature does not work
with Integrity VM.
2
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