[libvirt] cache=none

[Daniel P. Berrange]

On Thu, Oct 22, 2009 at 06:33:25PM +0200, Stefan wrote:
> > 
> >> * Is it generally a bad idea to use XFS with KVM ?
> > 
> > I don't know of any problems with using XFS, there was a bug a long while
> > back with a combo of AIO + sparse files, but that's long since fixed.
> > 
> 
> There are several warnings using XFS with KVM because of the intensive
> Write-Caching. Are these warnings obsolete ? cache=none in libvirtd.conf
> is not necessary anymore (sorry I'm a kvm/libvir-beginner) ?

Enabling write caching is dangerous on any filesystem in the event of the
host OS crashing before data is flushed. I don't think XFS is special in
this regard really. Everyone should disable write caching unless they
don't care about their data.


Daniel
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