I saw that it is not a good idea to use btrfs CoW functionality for big files, such as data directories of a PostgreSQL database.
Since I use docker for databases, I now ask myself, if I should disable CoW for the whole
/var/lib/docker directory. But I'm not sure, because docker's layered filesystem makes use of this feature, or not?
Or is it possible, to disable CoW for just some specific volumes?