What two methods can be used to reduce the vMotion migration time of a virtual machine? (Choose two.)
A.
Enable High priority on the virtual machine before starting the Migrate wizard.
B.
Select High priority during the Migrate wizard.
C.
Lower the memory reservation for the virtual machine.
D.
Ensure the cluster has the default Swapfile policy set.
Answer B and D
When migrating a live VM, the wizard will ask you what priority level you want. It states “high priority vMotions are favored over standard priority vMotions and are expected to perform better”
Open the cluster settings and goto Swapfile Location. You can change the default setting to store it in the datastore specified by the host. But it warns: “A host specified datastore may degrade vMotion performance for the affected virtual machines”
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http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.resmgmt.doc%2FGUID-20F113FE-ACE6-4DDE-B159-3F10482837C0.html
You might choose to configure an alternative swapfile location to place virtual machine swapfiles on either lower-cost or higher-performance storage, depending on your needs.
Note:
Setting an alternative swapfile location might cause migrations with vMotion to complete more slowly. For best vMotion performance, store virtual machine swapfiles in the same directory as the virtual machine (which is the default).
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