[pve-devel] Speed up PVE Backup

[Dietmar Maurer]

> But I suppose they're mostly ordered?

Yes - depends how much writes happens during backup...

> > But you can try to assemble larger blocks, and write them once you get
> > an out of order block...
> Yes, this is the plan.
> > I always thought the ceph libraries does (or should do) that anyways?
> > (write combining)
> Reading the docs:
> http://docs.ceph.com/docs/hammer/rbd/rbd-config-ref/
> 
> It should be true when write-back rbd cache is activated. This seems to 
> be the default, but maybe we're using disk cache setting on restore too?
> 
> I'll try to change the disk cache setting and will report the results.

thanks!