HP Matrix Operating Environment Software - Manual (Page 94)

quickly. Configuration requirements for online migration are more elaborate than for offline
migration.
Some of the basic migration requirements include the following; for complete details, see the HP-UX
vPars and Integrity VM Administrator Guide manual:
•
For online migration, the source and target VSPs must be running HP Integrity VM Version 4.1
or later.
•
The source and target VSPs must conform to the operating system requirements, and both must
be able to provide the allocated resources to the VM being migrated.
•
The target VSP must be accessible from the source VSP.
•
Resources used by the VM must be configured symmetrically on both the source and target
VSP.
•
You can migrate guests that use both the virtual I/O (VIO) and the accelerated virtual I/O
(AVIO) drivers for storage and network. Only whole disk SAN storage and ejected file-backed
DVDs can be migrated while the VM is online. File and logical volume backing storage are
not supported for online migration of VMs.
•
Online migration requires that both the source and target VSP be licensed and enabled for
such migration. The licensing is included with a bundle that must be installed on each VSP;
for more information, see the HP-UX vPars and Integrity VM Administrator Guide manual.
•
Online VM migration requires that the VM be enabled for online migration (the VSP
administrator can enable a VM by using the hpvmmodify -x
online_migration=enabled
command).
Serviceguard requirements and recommendations
For online migration of a VM configured as a Serviceguard package, package switching for the
migrating VM guest package is disabled before migration begins and then re-enabled immediately
after the migration finishes. Therefore, the VM software is not protected by Serviceguard during
the migration process. If a failure occurs during migration, you must manually re-enable package
failover after the migration completes and restart the VM by running it on one of the Serviceguard
cluster nodes.
If temporary loss of failover protection is not tolerable, disable online migration for the VM. For
example, to disable the VM named sgnode, run the hpvmmodify command on the VSP as follows:
hpvmmodify -P sgnode -x online_migration=disabled
Do not attempt online migration of a VM configured as a Serviceguard cluster node. If a
Serviceguard node is migrated while online, it might lose connection to other cluster members and
be automatically removed from the cluster. Disable online migration for all VMs configured as
Serviceguard cluster nodes.
NOTE: Integrity Virtual Server Manager detects whether a VM is configured as a Serviceguard
package; the VSP Virtual Servers and VM Properties General tab tabs display the package icon
( ) next to the VM name.
For more information about managing VMs with Serviceguard support, see the HP-UX vPars and
Integrity VM Administrator Guide manual.
Capacity Advisor requirements and recommendations
If Capacity Advisor is used on the VM, collect utilization information before you migrate the VM.
The Capacity Advisor cannot continue to collect utilization information for the VM during the
migration.
94 Working with VMs or vPars