Apparently that does not work - FITRIM ioctl not backported to RHEL6 kernel perhaps? fstrim -v /backup fstrim: /backup: FITRIM ioctl failed: Operation not supported df -h /dev/mapper/VolGroupL0-thin_backup 591G 104G 458G 19% /backup mount (added discard option today) /dev/mapper/VolGroupL0-thin_backup on /backup type ext4 (rw,discard) Cheers, -- ---------------------------------------------- Andres Toomsalu On 02.11.2012, at 13:20, Zdenek Kabelac wrote: > Dne 2.11.2012 11:46, Andres Toomsalu napsal(a): >> Thanks a lot for a detailed explanation - now everything fits into places :) >> >> Some answers: >> >> 1) Filesystem in use is ext4 at all cases >> 2) Im not using discard option as Im not very aware how to use it - is it a filesystem mount option for fstab? >> 3) OS is CentOS 6.3 with RHEL OpenVZ patched kernel (2.6.32-042stab061.2 #1 SMP Fri Aug 24 09:07:21 MSK 2012 x86_64 x86_64 x86_64 GNU/Linux) >> > > So check for 'fstrim' command - it's usage is quite simple, and should be already pretty matured tool. > > i.e. you could run it once a week in cron. > > Zdenek > > > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
