[sheepdog-users] Single disk getting full

[Liu Yuan]

On Wed, Aug 07, 2013 at 03:07:14PM +0800, Liu Yuan wrote:
> On Wed, Aug 07, 2013 at 08:23:49AM +0200, Valerio Pachera wrote:
> > I unplugged the full disk;
> > waited for the recovery to be done;
> > (manually removed data in obj dir, just to be sure)
> > plugged it back and waited for the recovery:
> > 
> > # collie node md info
> > Id      Size    Used    Avail   Use%    Path
> >  0      2.7 TB  1.8 TB  950 GB   66%    /mnt/sheep/dsk02
> >  1      169 GB  76 GB   93 GB    44%    /mnt/sheep/dsk01/obj
> > 
> > Now it's fine :-)
> > 
> > I have to do the same on another node:
> > 
> > Node 0:
> >  0      166 GB  154 GB  12 GB    92%    /mnt/sheep/dsk01/obj
> >  1      465 GB  318 GB  147 GB   68%    /mnt/sheep/dsk02
> >  2      1.8 TB  1.1 TB  716 GB   61%    /mnt/sheep/dsk03
> > 
> > 
> > In these two cases (node 2 and node 0), it's ok to unplug the full
> > disk because there is enough space on the second (and third) disk to
> > rebuild data.
> > If there was not enough space, it was probably going to fail the rebuild.
> > 
> > I know in theory it should not happen to have a disk used more than
> > another but it actually does.
> > May it be possible to implement something like
> >   collie node md reweight
> > ?
> 
> Well, I have no idea why unplug/plug effectively rebalance the data. Before we
> do anything further, we need to find out why it works. Any idea kazum?

Cc Kazutaka