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

#hpvmmodify -P guestname -x runnable_status=enabled
WARNING! Be very careful when marking a guest Runnable when it was previously Not
Runnable. Make sure this guest is Not Runnable and definitely not actually running on any
other VSP.
12.3.5 Restrictions and limitations of online VM migration
Administrators should carefully configure certain aspects of VSPs and guests for online migration
capability. Integration with automated workload placement, management and load balancing
tools are not supported in this release. Only Integrity VM command-line interfaces are available
in V6.1.5. More automated and more convenient management of distributed Integrity VM guests
might follow in subsequent Integrity VM releases.
A dedicated high-speed network should not be on the data center, work site, company, or “public”
LAN. Online migration can also swamp the network while a migration is in progress. Using the
site's network for migration traffic would also create peaks of network activity that might affect
network performance. Using a high-speed network is desirable to minimize guest memory transfer
time and allows your guest to migrate smoothly.
The following devices are supported for guest storage for online guest migration:
• Whole disk backing stores consisting of SAN LUNs
• Ejected file-backed DVDs
• SLVM volumes
• NFS-mounted backing stores
File backing stores that are not NFS-mounted and attached devices are not supported for online
guest migration.
Only one online migration to or from a VSP can be performed at a time. Also, be aware of the
state of the guest while migrating it online. If the guest is in the On (EFI) state and no guest operating
system is booted, the online migration fails with an error. If the guest is shutting down, restarting
or crashing while migrating, the online migration aborts when the hpvmmigrate command can
no longer communicate with the guest.
Online migration support among Integrity servers is limited by the processor architecture. Online
migration among servers with processor family 31 is supported regardless of the model number
within that family. Migration among servers with processor family 32 and model numbers 0 or 1
is supported. Otherwise, online migration is supported among servers with identical processor
family and model number.
To check if a guest can be migrated to the target VSP, use the -s option to the hpvmmigrate
command.
NOTE: Integrity VM supports SLVM backing storage for online migrations. For details about
shared LVM (SLVM) storage, see Chapter 12 (page 199).
Veritas volumes are not supported for Online VM Migration.
218 Migrating virtual machines and vPars