[sheepdog-users] dog cluster snapshot problems

[Liu Yuan]

On Fri, Aug 08, 2014 at 03:29:51PM +0800, Liu Yuan wrote:
> On Fri, Aug 08, 2014 at 09:02:13AM +0200, Valerio Pachera wrote:
> > 2014-08-07 17:33 GMT+02:00 Andrew J. Hobbs <ajhobbs at desu.edu>:
> > 
> > > The slowness is an issue for me.  In our cluster now, we're already up to
> > > the cluster snapshot taking more than six hours to complete, whereas the
> > > backup script runs in less than 2 hours for full, or 10 minutes for the
> > > incrementals (roughly).
> > >
> > 
> > Thank you very much for sharing your experience!
> > 
> > 
> > > I was originally enchanted by the idea of using cluster snapshot, but
> > > we've been through a few cycles with memory leaks
> > 
> > 
> > I remember the memory leack issue but it was long time ago.
> > Sure it require more testing.
> > 
> > I'm curious to hear form the developers if, later on, it will be possible
> > to have better performance or there are no chances.
> 
> There are always performance-wise enhancement todos for cluster snapshot due to
> its present naive implementation. and it is not feature complete. Thanks to Ruoyu
> effort, we can partially save/restore user specified vdis now and I think there
> still far away to be feature complete.
> 

Ruoyu, would you please add a wiki on how to do paritial save/restore? Then
people can test and make use of this feature.

Thanks
Yuan