HP vPars and Integrity Virtual Machines V6.1 Administrator Guide

12 Migrating virtual machines and vPars
There are several different forms of migration. With the hpvmmigrate command, you can move
either an offline virtual partition or virtual machine, or a live, online virtual machine running a guest
operating system and applications from a source VSP system to a target VSP system.
This chapter includes the following topics:
• Introduction to vPars and virtual machine migration
• Command line interface for online and offline migration
• VSP, vPars, and virtual machine configuration considerations
• Migrating from physical to virtual machines
12.1 Introduction to migration
Virtual machines and virtual partitions can be moved from one VSP system to another in a variety
of ways. vPars and Integrity VM V6.1 provides the following types of migration:
• To move the VM or vPar from one VSP system to another, use the hpvmmigrate command.
(Note, the vPar can be moved offline only from one BL8x0c i2 to another or one Superdome
2 system to another.) The VM can be either a non-running VM guest or vPar configuration
(offline migration) or a running VM guest (online migration). Online migration enables a
running VM and its applications to be moved from one VSP to another without service
interruption. All VM I/O connections to storage and networks remain active throughout the
online migration, and the VM and all its applications continue operating without a reboot or
application restart.
• To migrate a Serviceguard Packaged VM online, use the cmmovepkg command. For more
information, see the cmmovepkg(1M) manpage or the HP Serviceguard Toolkit for Integrity
Virtual Servers User Guide at HP Serviceguard Toolkit for Integrity Virtual Servers.
Figure 12 illustrates the process of moving a guest from Host A to Host B offline.
Figure 12 Symmetric VSPs Configured for Guest Migration
12.1 Introduction to migration 195