Settings compression for a filesystem

[Martin Steigerwald <martin@lichtvoll.de>]

Hi!

I do have a bunch of BTRFS on LUKS backup disks. Plasma desktop mounts 
them unter /media… however, it does not mount with compression enabled. 
I do have some older backup disks which are in /etc/fstab including 
mount option "compress=zstd".

Is there any way to tell BTRFS to always use a certain compression 
algorithm for all newly written files (and of course existing files which 
use compression) without adding an entry in fstab for each disk?

I thought about

btrfs property set MOUNTPOINT compression zstd

but that sets the property just on the root inode of the mounted 
filesystem. Does it propagate? The manpage does not seem to have any 
information on that.

If not, well then I add the entries to fstab.

Thanks,
-- 
Martin