A virtual machine (VM) with a single 100 GB virtual machine disk file has a single 20 GB snapshot. The virtual machine is powered off. How much additional free space on the datastore is required to delete the snapshot, committing the snapshot delta disk to the base disk?
A. 120 GB
B. 100 GB
C. 0 GB
D. 20 GB
👽 To be on the safe side, when deleting (committing) snapshots you need to have at least as much free space on datastore as the size of largest snapshot + few extra GBs. The base disk can only "baloon" up only by amount of data in the snapshot, which is 20GB according to the provided answer and to be on the safe side, you should assume that it will. So you need at least (20GB I'd say) free on datastore for a safe delete-snapshot operation.
ReplyDeleteOnly after all the snap data is committed to base disk, the snapshot will be deleted. Therefore you need some 20GB free or more available on datastore to start the deletion process. Deleting snapshot on a powered off VM could help a little bit.