Btrfsd is a lightweight daemon that takes care of running Btrfs filesystem maintenance tasks. It can:

* Check for detected errors and broadcast a warning if any were found, or optionally send an email * Perform scrub periodically if the system is not on battery * Optionally run balancing operations periodically

The daemon is designed to be run on any system, from a small notebook to a large storage server. If no Btrfs filesystems are found, the daemon will be inert.

By default, Btrfsd is called every hour via a systemd timer.