HP Integrity Virtual Machines 4.2: Installation, Configuration, and Administration

Figure 10-1 Symmetric Hosts Configured for Guest Migration
The basic virtual machine migration environment includes a source machine and a target machine.
Both must be running Integrity VM and must be able to run the guests. Both machines must
conform to their operating system requirements and restrictions, and both must be able to provide
the allocated resources to the guest. If the guest uses 2 GB of memory on one machine, it must
be able to use that amount on the other machine. Similarly, if the source machine can provide a
guest with four vCPUS, the target machine must also be able to provide them. To modify the
virtual devices or network on the target host, use the hpvmmodify command.
To enable migration, all resources used by the guest must be configured symmetrically on both
the source and target host. A symmetric configuration includes:
• A common local area network (LAN)
• Identical subnet and vswitch connectivity
• Common access for Storage Area Network (SAN) based storage
• Private, high-speed network connection (for Online VM Migration)
For guidelines about setting up storage for migrating virtual machines, see Section 10.3 (page 174).
If the HP Capacity Advisor is used on the virtual machine, collect utilization information before
you migrate the virtual machine. The Capacity Advisor cannot continue to collect the utilization
information for the virtual machine during the migration operation.
Figure 10–2 illustrates moving a guest online from a source VM Host to a target VM Host.
166 Migrating Virtual Machines