HP-UX vPars and Integrity VM V6.1.5 Administrator Guide (5900-2295, April 2013)

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 V6.1.5 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 back and forth only from the same system type.) 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 199