Peter Stuge <pe...@stuge.se> wrote:

Hey,

defragging btrfs does not seem to work for me. I have run the filefrag
command over the whole fs and (manually) tried to defrag a few heavily
fragmented files, but I don't get it to work (it still has the same
number of extends and they are horrently uncorrelated)

root@schleppi:~# filefrag
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.4/cc1
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.4/cc1: 72 extents found
root@schleppi:~# btrfs filesystem defrag
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.4/cc1
root@schleppi:~# filefrag
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.4/cc1
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.4/cc1: 72 extents found

I'm using Ubuntu Natty (2.6.38.4) and tried both btrfs-tools from Natty
(201006xx) and from Debian experimental (git from 20101101). Both show
the same symptoms. I don't think fragmentation is bad on this box (due
to having an SSD), but my system at home is getting dog slow and I'd
like to try that when I come home end of the week.

Best Regards,
Bernhard

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