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→Migrating Virtual Machines
== Migrating Virtual Machines ==
VMM 2008 provides the ability to migrate Hyper-V, VMware ESX Server and Virtual Server based virtual machines between different hosts. The following migration paths are supported:
* Hyper-V host to Hyper-V host
* Virtual Server host to Virtual Server host
* Virtual Server host to Hyper-V host
* VMware ESX Server host to VMware ESX Server host
At the time of writing, only VMware ESX Server's VMotion feature supports live migration whereby there is no interruption of service as the virtual machine is migrated. Current versions of both Hyper-V and Virtual Server only support static migration, where the virtual machine state is saved during the migration process and then restored on the destination host causing a loss of service. Live migration is scheduled for inclusion in future Hyper-V versions.
To perform a virtual machine migration, select ''Virtual Machines'' view of the VMM Administrator Console, select the virtual machine to be migrated and click on the ''Migrate'' link in the ''Actions'' screen.
This will display the ''Migrate Virtual Machine Wizard'' which will being by providing a list of target hosts. The table contains a ''Type'' columns which indicated the type of migration which will be performed. In the case of VMware ESX Server based virtual machines, the default type will be ''VMotion''. Select the host to which the virtual machine is to be migrated and click ''Next'' to select the file system location for the virtual machine files on the destination host. The next screen allows any network adapters present in the virtual machine to be assigned to virtual networks on the destination host. Finally, the summary screen includes a ''Migrate'' button to initiate the migration.
