Re: Write-back vs. write-through for VMs

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On Fri, Jan 11, 2013 at 11:48:41AM -0800, Sean Omalley wrote:
> They switched the default cache to writeback in qemu 1.2 which is shipped with F18.
> http://wiki.qemu.org/ChangeLog/1.2
> 
> F17 shipped with qemu version 1.0.1 which I think defaults to writethrough. 
> 
> If you don't change the command I'd think you should get writeback automatically after the upgrade. 

  Indeed, I would suggest to go with QEmu defaults there and not try to
override. I/O and consistency there are very complex issues, I would say
don't try to change the default unless you really know the issues at
hand and the specifics of the target system :-)

Daniel

-- 
Daniel Veillard      | Open Source and Standards, Red Hat
veillard@xxxxxxxxxx  | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | virtualization library  http://libvirt.org/
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