Data that already exists will only be compressed on re-write. You can do it with btrfs fi defrag and a script that traverses the fs to call defrag on every file. Another good way is the find command that has been outlined here:
https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#Defragmenting_a_directory_doesn.27t_work On Sun, May 26, 2013 at 12:29 AM, Leonidas Spyropoulos <artafi...@gmail.com> wrote: > On Sat, May 25, 2013 at 1:13 PM, Martin Steigerwald <mar...@lichtvoll.de> > 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 > > -- > Caution: breathing may be hazardous to your health. > > #include <stdio.h> > int main(){printf("%s","\x4c\x65\x6f\x6e\x69\x64\x61\x73");} > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
