On Mon, Feb 17, 2020 at 03:12:35PM +0100, Menion wrote: > ok thanks > I have launched it (in a tmux session), after 5 minutes the command > did not return yet, but dmesg and btrfs balance status > /array/mount/point report it in progress (0%). > Is it normal? Yes, it's got to rewrite all of your metadata. This can take a while (especially if you have lots of snapshots or reflinks -- such as from running a deduper). You should be able to see progress happening fairly regularly in dmesg. This is typically one chunk every minute or so, although some chunks can take much *much* longer. Hugo. > Il giorno lun 17 feb 2020 alle ore 14:55 Swâmi Petaramesh > <swami@xxxxxxxxxxxxxx> ha scritto: > > > > On 2020-02-17 14:50, Menion wrote: > > > Is it ok to run it on a mounted filesystem with concurrent read and > > > write operations? > > > > Yes. Please check man btrfs-balance. > > > > All such BTRFS operations are to be run on live, mounted filesystems. > > > > Performance will suffer and it might be long though. > > > > > Also, since the number of HDD is 5, how this "raid1" scheme is deployed? > > > > BTRFS will manage storing 2 copies of every metadata block on 2 > > different disks, and will choose how by itself. > > > > ॐ > > -- Hugo Mills | You've read the project plan. Forget that. We're hugo@... carfax.org.uk | going to Do Stuff and Have Fun doing it. http://carfax.org.uk/ | PGP: E2AB1DE4 | Jeremy Frey
