btrfs-snapshot: Take and rotate snapshots on a btrfs file system
Usage:
btrfs-snapshot source target snap_name count [-q]
source: path to make snapshot of
target: snapshot directory
snap_name: Base name for snapshots, to be appended to
date "+%F--%H-%M-%S"
count: Number of snapshots in the timestamp-@snap_name format to
keep at one time for a given snap_name.
[-q]: Be quiet.
Example for crontab:
15,30,45 * * * * root /usr/local/bin/btrfs-snapshot / /.btrfs quarterly 4 -q
0 * * * * root /usr/local/bin/btrfs-snapshot / /.btrfs hourly 8 -q
Example for anacrontab:
1 10 daily_snap /usr/local/bin/btrfs-snapshot / /.btrfs daily 8
7 30 weekly_snap /usr/local/bin/btrfs-snapshot / /.btrfs weekly 5
@monthly 90 monthly_snap /usr/local/bin/btrfs-snapshot / /.btrfs monthly 3
FAQ:
1. I get an error like "btrfs subvolume snapshot SOURCE DESTINATION: line 77: btrfs: command not found"
Please make sure the btrfs command is in your PATH (e.g. in Debian it is not in cron's default PATH)