On Wed, 12 Sep 2012, norritt@xxxxxxxxxxx wrote: > Date: Wed, 12 Sep 2012 18:36:24 +0200 > From: norritt@xxxxxxxxxxx > To: linux-ext4@xxxxxxxxxxxxxxx > Subject: Ongoing data reorganization/defragmentation? > > Ongoing data reorganization/defragmentation? > > In my efforts to optimize an ext4 for usage on SSDs, I have found information > on the web about ext4 I've not been able to verify. > > From what I've found out it's a good idea to: > - mount with noatime, discard (if drive supports trim) The -o discard option might be tricky since some devices still handles it quite badly and you can experience big performance drops (http://people.redhat.com/lczerner/discard/ although it is somewhat outdated already). But you might to try to see yourself if it does not hurt your performance. The other option would be to use batched discard with fstrim (see fstrim from util-linux) and run it once per (day, week, month). Thanks! -Lukas -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
