Ok, but what if I am just a non-root user who want to transparently compress some of their data? What if I am a root user who does just want to compress some large folder transparently and doesn't want to mess up with subvolumes? I know that from sysadmin point of view, there is no need for this, but from regular user point of view, who have btrfs on their laptop, this could make life easier. On Sat, Mar 21, 2015 at 7:22 PM, Roman Mamedov <rm@xxxxxxxxxxx> wrote: > On Sat, 21 Mar 2015 18:56:12 +0100 > Petr Bena <benapetr@xxxxxxxxx> wrote: > >> unlike NTFS, compressing files in btrfs is not so simple > > There shouldn't be any need to micro-manage compression on Btrfs on a > per-folder or per-file basis. Just mount the whole volume as compress=[method] > (but not compress-force), there shouldn't be any downside, on the contrary, > with the current ratio of CPU core count and their performance to disk I/O > speed, you are likely to even see a speed-up. Also files which are detected to > be incompressible are automatically skipped from compression (at least that's > what it tries to do by design). > > If you want higher performance and less fragmentation on certain files/folders, > you are supposed to set them NOCOW, at which point the compression is also > automatically disabled. > > -- > With respect, > Roman -- 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
