Clone type

With the VMware VMDK drivers, you can create a volume from another source volume or a snapshot point. The VMware vCenter VMDK driver supports the full and linked/fast clone types. Use the vmware:clone_type extra spec key to specify the clone type. The following table captures the mapping for clone types:

If you do not specify the clone type, the default is full.

The following example shows linked cloning from another source volume:

$ cinder type-create fast_clone
$ cinder type-key fast_clone set vmware:clone_type=linked
$ cinder create --volume-type fast_clone --source-volid 25743b9d-3605-462b-b9eb-71459fe2bb35 --display-name volume1 1

	Note
	The VMware ESX VMDK driver ignores the extra spec entry and always creates a full clone.