I worked a bit with SLES (the enterprise suse), they use btrfs as root (snapshot feature), but the HARD recomendation from them is: -Use btrfs JUST for the OS

I worked a bit with SLES (the enterprise suse), they use btrfs as root (snapshot feature), but the HARD recomendation from them is: -Use btrfs JUST for the OS (just use mirror if you have to) nothing else..don't change any switch, don't defrag...don't touch it with the exception of making and restoring/deleting snapshots. -Use XFS for Data