Hi, If I have a snapshot where I overwrite a big file but which only a small portion of it is different, will the whole file be rewritten in the snapshot? Or only the different part of the file? Something like: $ dd if=/dev/urandom of=/big_file bs=1M count=1024 $ cp /big_file root/ $ btrfs sub snap root snapshot $ cp /big_file snapshot/ In this case is root/big_file and snapshot/big_file still share the same data? Thank you
