HP Integrity Virtual Machines 4.2.5: Release Notes

9 Migrating Virtual Machines
This chapter contains information about migrating virtual machines.
9.1 Changes and Issues in This Release
The following section provides updated information about online migration in the V4.2.5 release.
9.1.1 Online Migration Support
The following list provides the supported online migration paths for HP-UX guests:
• A V4.2 guest can be online migrated to V4.2.5.
• A V4.2 guest plus general release patches can be online migrated to V4.2.5.
• A V4.2.5 guest can be online migrated back to a configuration comparable to that on which
it was previously booted:
◦ A V4.2 guest that has been online migrated to V4.2.5 can be migrated back to V4.2.
◦ A V4.2 guest also running general release patches that has been online migrated to
V4.2.5 can be migrated back to V4.2 and the exact same set of general release patches.
NOTE: For a list of V4.2 general release patches, see the VM Host and VM Guest patch
tables in Chapter 2 of the HP Integrity Virtual Machines 4.2: Release Notes on the BSC
website: HP Integrity Virtual Machines 4.2: Release Notes.
NOTE: Online VM Migration is supported with HP-UX and OpenVMS guests.
9.2 Known Issues and Information
The following sections describe known issues and information from previous releases that still apply
to V4.2.5.
9.2.1 Online Migration Support Limited to System with Compatible Processors
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 VM Host, use the -s option to the hpvmmigrate
command.
9.2.2 Location of Command Used to Initiate Online Migrations of Serviceguard Guest
Packages not in $PATH
The hpvmsg_move command is used to initiate online migrations of Serviceguard guest packages.
This command is located in the /opt/cmcluster/toolkit/hpvm directory, which is not added to the
users PATH variable during installation. To initiate an online migration, use the full pathname to
the hpvmsg_move command. The full pathname to the command is:
/opt/cmcluster/toolkit/hpvm/hpvmsg_move
9.2.3 Possible hpvmmigrate Command Error Messages
You might receive the following message after specifying an hpvmmigrate command:
9.1 Changes and Issues in This Release 89