The current ZFS configuration on your server is:
pool1 124K 3.91G 32K /pool1
pool1/data 31K 3.91G 31K /data
You need to create a new file system named /data2. /data2 will be a copy of the /data file system.
You need to conserve disk space on this server whenever possible.
Which option should you choose to create /data2, which will be a read writeable copy of the /data file system,
while minimizing the amount of total disk space used in pool1?
A.
zfs set mountpoint=/data2 compression=on pool1/data2
B.
zfs snapshot pool1/data@nowzfs set mountpoint=/data2, comptession=on pool1/data@now
C.
zfs create snapshot pool1/data@nowzfs send pool1/data@now | zfs recv pool1/data2
D.
zfs create snapshot pool1/data@nowzfs clone -o mountpoint=/data2 pool1/data@now pool1/data2
E.
zfs snapshot pool1/data@nowzfs clone -o mountpoint=/data2 -ocompression=on pool1/data@now pool1/
data2
F.
zfs snapshot pool1/data@nowzfs clone -o mountpoint=/data2 pool1/data@now pool1/data2
Explanation:
zfs snapshot [-r] [-o property=value] … filesystem@snapname|volume@snapname
Creates a snapshot with the given name. All previous modifications by successful system calls to the file
system are part of the snapshot
zfs clone [-p] [-o property=value] … snapshot filesystem|volume
Creates a clone of the given snapshot.
Note:
Because snapshots are fast and low overhead, they can be used extensively without great concern for system
performance or disk use .
With ZFS you can not only create snapshot but create a clone of a snapshot.
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.
A clone is a writable volume or file system whose initial contents are the same as the original dataset. As with
snapshots, creating a clone is nearly instantaneous, and initially consumes no additional space.
Clones can only be created from a snapshot. When a snapshot is cloned, it creates an implicit dependency
between the parent and child.