Re: balance hangs and starts again on reboot

["Holger Hoffstätte" <holger.hoffstaette@googlemail.com>]

On 03/05/16 18:25, Marc Haber wrote:
> 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?

Except for the 100 part, which seems pointless. Maybe more like
10,20..80 max. If that doesn't help you are probably out of space
anyway.

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

Touching less stuff conditionally is pretty much guaranteed to be
faster than unconditionally rewriting everything, and less likely to
end up out of space since you garbage-collect the smallest chunks
first, freeing up a larger one and so on.

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

I thought your df output contained md or something. If not, all the
better.

-h