I am wondering what is the technical difficulties to achieve that, in the same process to restore a vm to multiple copies?
There are use cases here if NetBackup can have this feature that would be greatly helpful.
this is NetBackup design - it cannot restore an object into multiple copies in one restore job, regardless if it is a VMware or not.
However when the backup image on disk, it can be read by multiple verify/restore jobs, so you can issue these restore jobs quickly one after another, and these multiple restores then run almost parallelly..
When the backup is on a tape, then restore jobs must wait one for another, and thus run sequentially.