On Tue, Jan 10, 2012 at 12:40 PM, Mitch Harder <mitch.harder@xxxxxxxxxxxxxxxx> wrote: > 2012/1/10 Michal Suba <michal.suba@xxxxxxxxxxx>: >> Hello >> >> we are currently investigating performance issue on system runing above >> btrs filesystem. Is it possible, that performance is impacted by lack of >> free space? Also, how to get info about real free space on btrfs volume? >> >> # btrfs-show /dev/sdb1 >> Label: opt uuid: 28a55827-e677-47a9-98d5-d31eb3d71436 >> Total devices 1 FS bytes used 167.83GB >> devid 1 size 240.00GB used *229.25GB* path /dev/sdb1 >> >> Btrfs Btrfs v0.19 >> >> # btrfs filesystem df /opt >> Data: total=213.23GB, used=165.26GB >> System, DUP: total=8.00MB, used=40.00KB >> System: total=4.00MB, used=0.00 >> Metadata, DUP: total=8.00GB, used=2.57GB >> >> # df -h /opt >> Filesystem Size Used Avail Use% Mounted on >> /dev/sdb1 240G 171G 59G 75% /opt >> >> How come that there is difference detween btrfs-show and df .. 40GB Is the >> space really usead or can I claim it back? (there are no snapshots) >> >> # btrfs subvolume list /opt >> # >> > > The btrfs-show command is being deprecated. It's output can be easy > to misunderstand, but it probably won't be corrected since it's going > away at some point. The output of "btrfs fi show /dev/whatever" is identical, and isn't going away afaik. That said, it is easy to misinterpret, although that's probably unavoidable while still actually presenting that information. -- 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
