# ZFS Automatic Snapshot Daemon

This is a daemon, written in Python 3, that will schedule regular
snaphots of ZFS datasets (pools, filsystems) according to a set of
configurable schedules. Options for interval and crontab-style
schedules are available.

The daemon includes an installer for macOS `launchd`. For Linux,
see the example `systemd` config file in `docs`. Modify as needed,
copy to `/etc/systemd/system` folder, run `systemctl start zasd`
and `systemctl enable zasd` as root to run on boot.

Snapshots may be made conditional with the `if_modified` option
on each schedule. In this mode, a snapshot will only be taken if
a dataset has been modified since the last snapshot.

The daemon should not interfere with other snapshots you have
on the system, unless you give them names that adhere to the
`dataset@tag:serial` syntax `zasd` uses, and the `tag` parts
happen to match of the tags in `zasd.conf.py`. If you're already
using similar syntax for something else, you may need to change
the `separator` setting in `zasd.conf.py`.

**DISCLAIMER:** This program is still in beta. Use at your own
risk. It works fine on my system, but your mileage may vary.

## Requirements

* `apscheduler` PIP package
* `fswatch` program