Btrfs devel - Jan 2012 - How long does it take to balance a 2x1TB RAID1 ?

Hi,

I have setup up a btrfs RAID1 using two 1TB drives. How long should a 
''btrfs filesystem balance'' take? It is running now for more
than 3 days
on about 30% CPU and 40% wait state.

I am using stock btrfs from ubuntu 11.10 kernel 3.0.0

Regards

Dirk



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On 1/6/2012 6:23 AM, Dirk Lutzebäck wrote:
> Hi,
>
> I have setup up a btrfs RAID1 using two 1TB drives. How long should a
> ''btrfs filesystem balance'' take? It is running now for
more than 3 days
> on about 30% CPU and 40% wait state.
>
> I am using stock btrfs from ubuntu 11.10 kernel 3.0.0
Not nearly that long.  Assuming it actually has to rewrite 1 TB of data 
and is only getting 50 MB/s, that should only take about 5.5 hours.  You 
might want to try a newer kernel ( like the one from 12.04 ).
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