Overview of ZFS Clones
A clone is a writable volume or file system whose initial contents are the same as the dataset from which it was created. As with snapshots, creating a clone is nearly instantaneous and initially consumes no additional disk space. In addition, you can snapshot a clone.
Clones do not inherit the properties of the dataset from which they were created. Use the zfs get and zfs set commands to view and change the properties of a cloned dataset. For more information, see Setting ZFS Properties.
Because a clone initially shares all its disk space with the original snapshot, its used property value is initially zero. As changes are made to the clone, it uses more disk space. The used property of the original snapshot does not include the disk space consumed by the clone.
This section covers the following topics: