On Mon, Dec 21, 2015 at 11:25:29AM +1100, Trent W. Buck via luv-main wrote:
One thing rsnapshot does reasonably well is faking multiple tape rotations within the snapshot set. e.g. you say "1 yearly, 2 monthlies, and 7 dailies", and it works out which snapshots to expire. I don't know how to do that in btrfs/zfs land.
personally, i rolled my own simple snapshot rotation script for zfs, but One Of These Days i'll probably switch to either zfsnap: Package: zfsnap Version: 1.11.1-3 Installed-Size: 48 Maintainer: John Goerzen <jgoerzen@complete.org> Architecture: all Depends: zfs-fuse | zfsutils | zfs, bc Description-en: Automatic snapshot creation and removal for ZFS zfSnap is a simple sh script to make rolling zfs snapshots with cron. The main advantage of zfSnap is it's written in 100% pure /bin/sh so it doesn't require any additional software to run. . zfSnap keeps all information about snapshot in snapshot name. . zfs snapshot names are in the format of Timestamp--TimeToLive. . Timestamp includes the date and time when the snapshot was created and TimeToLive (TTL) is the amount of time for the snapshot to stay alive before it's ready for deletion. Description-md5: 43c80483bf622b9e3c64221fe60f1f09 Homepage: https://github.com/graudeejs/zfSnap there are several similar snapshotting tools available, easily found with googling for 'zfs snapshot'. BTW, see also simplesnap: Package: simplesnap Version: 1.0.3 Maintainer: John Goerzen <jgoerzen@complete.org> Architecture: all Depends: zfs-fuse | zfsutils | zfs, liblockfile-bin Suggests: zfsnap Description-en: Simple and powerful network transmission of ZFS snapshots simplesnap is a simple way to send ZFS snapshots across a net- work. Although it can serve many purposes, its primary goal is to manage backups from one ZFS filesystem to a backup filesystem also running ZFS, using incremental backups to minimize network traffic and disk usage. . simplesnap it is designed to perfectly compliment snapshotting tools, permitting rotating backups with arbitrary retention periods. It lets multiple machines back up a single target, lets one machine back up multiple targets, and keeps it all straight. . simplesnap is easy; there is no configuration file needed. One ZFS property is available to exclude datasets/filesystems. ZFS datasets are automatically discovered on machines being backed up. . simplesnap is robust in the face of interrupted transfers, and needs little help to keep running. . nlike many similar tools, simplesnap does not require full root access to the machines being backed up. It runs only a small wrapper as root, and the wrapper has only three commands it implements. Homepage: https://github.com/jgoerzen/simplesnap craig -- craig sanders <cas@taz.net.au>