I recently deleted all the LXD containers using the default BTRFS storage and the space used by the storage did not shring (according to both
lxc storage info default and
du -h /var/snap/lxd/common/lxd/disks/default.img there was no impact on the used space).
@stgraber explains here LXD deletes the container after the storage space is not released · Issue #5690 · lxc/lxd · GitHub that ZFS pools never shrink. Is it also true for BTRFS pools?
Thanks a lot in advance.