Planning requirements and recommendations – HP Matrix Operating Environment Software User Manual
Page 93
Some of the most common reasons for migrating VMs online include the need to:
•
Vacate the source VSP system for maintenance purposes without disrupting services
•
Perform a rolling upgrade of a VSP, moving its running guests to another VSP, upgrading the
VSP, then moving the guests back
•
Populate a new VSP with one or more VMs already configured and tested on the source
•
Move VMs to take advantage of a particular resource or feature on the target VSP, without
losing application availability
•
Balance VSP workloads
•
Optimize physical resource utilization
Online migration of VMs enables a higher level of workload-to-resource alignment, flexibility, and
agility.
Reasons for migrating a VM offline include the need to:
•
Move a stopped VM's configuration information
•
Save VSP resources while migrating VMs (for example, memory and CPUs are not consumed
during offline migration)
•
Copy local storage, logical volumes, or file-backed storage to the target VSP (such storage
cannot be migrated online)
•
Migrate a VM between VSP that might have different processor types, making online migration
impossible
The Migrate Virtual Machine wizard is started by selecting Tools
→Migrate Virtual Machine... from
the Integrity Virtual Server Manager menu bar. The menu item is enabled from the VM Properties
view, from which you can migrate the one viewed VM, or from a tab on which one or more VMs
are selected, such as the VSP Virtual Servers tab, from which you can migrate multiple VMs at the
same time. For more information about starting the wizard, see
The Migrate Virtual Machine wizard guides you through a two-step procedure. The screen for the
first step prompts you to specify the target VSP. The screen for the second step allows you to preview
the HP Integrity Virtual Machine commands that will be invoked to initiate the migration and allows
you to initiate the migration.
Using the Migrate Virtual Machine wizard, you can migrate VMs from the VSP you are currently
using with Integrity Virtual Server Manager to another VSP; you cannot use the wizard to migrate
VMs from another VSP to the current Integrity Virtual Server Manager VSP.
While a VM is being migrated to another VSP, you cannot stop, start, restart, modify, or delete
that VM. You can continue using Integrity Virtual Server Manager for other purposes.
NOTE:
If the VM is configured as a Serviceguard package, the wizard allows you to migrate
the VM online or offline. However, you cannot migrate a VM that is configured as a Serviceguard
cluster node.
When migrating a VM that is configured as a Serviceguard package, Serviceguard protection is
suspended temporarily during the migration.
Capacity Advisor cannot collect utilization information for a VM that is being migrated.
For more information about Serviceguard and Capacity Advisor requirements and recommendations
pertaining to VM migration, see
“Planning requirements and recommendations” (page 93)
Planning requirements and recommendations
Successful migration of a VM requires that the source and target hosts be configured appropriately.
If they are configured properly before migration of a VM, the migration task completes more
Working with VMs
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