HP-UX vPars and Integrity VM V6.3 Administrator Guide

• Whole disk backing stores consisting of SAN LUNs
• Ejected file-backed DVDs
• SLVM volumes
• NFS-mounted backing stores
• NPIV backing stores
• Cluster DSF
• DMP Nodes
File backing stores that are not NFS-mounted and attached devices are not supported for online
guest migration.
Following are the mandatory conditions while migrating a vPar or VM with cDSF as backing store:
• The source and the destination must belong to the same Cluster DSF group.
cmsetdsfgroup(1M) can be used to find if the source and destination belong to same
Cluster DSF group or not.
• The source and destination must have HPVM V6.3 or later.
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.
For more information about online migration, see HP-UX vPars and Integrity VM V6.3 Release
Notes available at http://www.hp.com/go/hpux-hpvm-docs.
NOTE: Online migration is not supported with DIO devices.
In the case of vPar or VM guests configured with NPIV, for both offline and online migrations, the
NPIV vHBAs must see the same Fibre Channel (FC) target as before migration.
If zoning is required, the FC switch must use World-Wide-Name (WWN) based zoning as opposed
to Port based zoning.
HP recommends that you do not use port based zoning or mixed zoning (using both WWN based
and port based zoning on the same fabric), because migration might fail under certain scenarios.
12.4 Inter family online migration support
Starting with vPars and Integrity VM V6.3, Online migration of VM guests between VSP systems
running Itanium 9300 processor and Itanium 9500 processor is supported. In other words, a VM
guests running on a BL860c i2 or SD2 i2 or rx2800 i2 can be migrated online to a system BL860c
i4 or SD2 i4 or rx2800 i4 systems. Additionally, online migration from an Itanium 9500 processor
system to Itanium 9300 processor system is also supported.
The following configuration must be set up to enable this feature.
1. VSP running on Itanium 9500 processor
a. Ensure the VSP is installed with the following:
• HP-UX 11i v3 March 2014 (AR1403) OE
OR
• HP-UX 11i v3 March 2013 (AR1303) OE with AR1403 Feature11i patches
• vPars and Integrity VM V6.3
b. Enable the tunable mdep_reduce_rse_size=1
To set the kernel tunable, enter the following:
12.4 Inter family online migration support 215