Re: balance hangs and starts again on reboot

[Marc Haber <mh+linux-btrfs@zugschlus.de>]

On Sat, Mar 05, 2016 at 04:38:57PM +0100, Holger Hoffstätte wrote:
> On 03/05/16 15:17, Marc Haber wrote:
> >> Then try to balance in small increments.
> > 
> > -dusage=5 and incrementing? Or what do you mean with "in small
> > increments"?
> 
> Exactly, yes. Sorry for not being more clear.

So you would recommend something along

for nr in $(seq 5 5 100); do
  btrfs balance start -dusage=$nr $FS
done

right?

Won't this take ages longer than a straight unfiltered balance?

> FWIW I've been balancing a lot recently (both for stress testing and
> cleaning up a few filesystems) and have never run into this particular
> stall, but only ever do filtered balances. Also I wouldn't be surprised
> at all if this is yet another problem where md does something in a way
> that btrfs doesn' expect, and things go wrong.

md as in the Linux Software RAID? That's not in the game here, it's a
single SATA hard disk.

Greetings
Marc

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