Hi,
Before doing the daily backup I did a btrfs check and btrfs scrub as usual.
After that this time I also decided to run btrfs filesystem defragment -r
-v -clzo on all subvolumes (from a live distro) and just to be sure I
runned check and scrub once again.
Before defragment: total bytes scrubbed: 15.90GiB with 0 errors
After defragment: total bytes scrubbed: 26.66GiB with 0 errors
What did happen? This is something like a night and day difference: almost
double the data! As stated in the subject all the subolumes have always
been mounted with compress=lzo in /etc/fstab, even when I installed the
distro a couple of days ago I manually mounted the subvolumes with -o
compress=lzo. Instead I never used autodefrag.
Niccolò
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