NAME

       zfs-snapshot — create snapshots of ZFS datasets

SYNOPSIS

       zfs snapshot [-r] [-o property=value]… dataset@snapname…

DESCRIPTION

       All  previous  modifications  by  successful  system  calls to the file system are part of the snapshots.
       Snapshots are taken atomically, so that all snapshots correspond to the same moment in  time.   zfs  snap
       can be used as an alias for zfs snapshot.  See the “Snapshots” section of zfsconcepts(7) for details.

       -o property=value
           Set the specified property; see zfs create for details.

       -r  Recursively create snapshots of all descendent datasets

EXAMPLES

   Example 1: Creating a ZFS Snapshot
       The  following  command  creates  a  snapshot named yesterday.  This snapshot is mounted on demand in the
       .zfs/snapshot directory at the root of the pool/home/bob file system.
             # zfs snapshot pool/home/bob@yesterday

   Example 2: Creating and Destroying Multiple Snapshots
       The following command creates snapshots named yesterday of pool/home  and  all  of  its  descendent  file
       systems.   Each  snapshot  is  mounted  on  demand in the .zfs/snapshot directory at the root of its file
       system.  The second command destroys the newly created snapshots.
             # zfs snapshot -r pool/home@yesterday
             # zfs destroy -r pool/home@yesterday

   Example 3: Promoting a ZFS Clone
       The following commands illustrate how to test out changes to a file system, and then replace the original
       file system with the changed one, using clones, clone promotion, and renaming:
             # zfs create pool/project/production
               populate /pool/project/production with data
             # zfs snapshot pool/project/production@today
             # zfs clone pool/project/production@today pool/project/beta
               make changes to /pool/project/beta and test them
             # zfs promote pool/project/beta
             # zfs rename pool/project/production pool/project/legacy
             # zfs rename pool/project/beta pool/project/production
               once the legacy version is no longer needed, it can be destroyed
             # zfs destroy pool/project/legacy

   Example 4: Performing a Rolling Snapshot
       The following example shows how to maintain a history of snapshots with a consistent naming  scheme.   To
       keep a week's worth of snapshots, the user destroys the oldest snapshot, renames the remaining snapshots,
       and then creates a new snapshot, as follows:
             # zfs destroy -r pool/users@7daysago
             # zfs rename -r pool/users@6daysago @7daysago
             # zfs rename -r pool/users@5daysago @6daysago
             # zfs rename -r pool/users@4daysago @5daysago
             # zfs rename -r pool/users@3daysago @4daysago
             # zfs rename -r pool/users@2daysago @3daysago
             # zfs rename -r pool/users@yesterday @2daysago
             # zfs rename -r pool/users@today @yesterday
             # zfs snapshot -r pool/users@today

SEE ALSO

       zfs-bookmark(8),  zfs-clone(8), zfs-destroy(8), zfs-diff(8), zfs-hold(8), zfs-rename(8), zfs-rollback(8),
       zfs-send(8)

OpenZFS                                          March 16, 2022                                  ZFS-SNAPSHOT(8)