Am Samstag, 25. Mai 2013, 23:29:41 schrieb Leonidas Spyropoulos: > On Sat, May 25, 2013 at 1:13 PM, Martin Steigerwald <Martin@xxxxxxxxxxxx> wrote: > > Am Samstag, 25. Mai 2013, 03:58:12 schrieb Duncan: > > [...] > > And can be verified by: > > > > martin@merkaba:~> grep ssd /proc/mounts > > /dev/mapper/merkaba-debian / btrfs rw,noatime,compress=lzo,ssd,space_cache 0 0 > > /dev/mapper/merkaba-debian /mnt/debian-zeit btrfs > > rw,noatime,compress=lzo,ssd,space_cache 0 0 > > /dev/mapper/merkaba-home /home btrfs rw,noatime,compress=lzo,ssd,space_cache 0 > > 0 > > /dev/mapper/merkaba-home /mnt/home-zeit btrfs > > rw,noatime,compress=lzo,ssd,space_cache 0 0 > > martin@merkaba:~> grep ssd /etc/fstab > > martin@merkaba:~#1> > > [...] > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > I see you are using compression. I don't have compression at the > moment and I would like to use it. What will happen to the data that > are already on the partitions? Will it be compressed when I use them? > Do I have to re-write them? Would it be compressed with btrfs defrag > command? > > Thanks for the information Only new or defragmented data as Harald explained already. Beware: I wouldn´t use compression on SSDs that compress themselves, like any modern SandForce SSDs I bet. The Intel SSD 320 in use here doesn´t compress itself, it just encrypts. -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
