If storage policy is enabled, the driver initially selects all the data stores that match the associated storage policy.
If two or more data stores match the storage policy, the driver chooses a data store that is connected to the maximum number of hosts.
In case of ties, the driver chooses the data store with
lowest space utilization, where space utilization is
defined by the
(1-freespace/totalspace)
metric.
These actions reduce the number of volume migrations while attaching the volume to instances.
The volume must be migrated if the ESX host for the instance cannot access the data store that contains the volume.
