Re: [libvirt] PATCH: Disable QEMU drive caching
On Thu, Oct 09, 2008 at 12:03:28PM -0500, Anthony Liguori wrote:
I've been persuaded. Relying on the host's integrity for
guest data
integrity is not a good idea by default. I don't think we should use
cache=off to address this though. I've sent a patch and started a
thread on qemu-devel. Let's continue the conversation there.
Well, it's really good to be able to expect a good default behaviour
but that doesn't mean there shouldn't be a user setting to activate
or deactivate caching explicitely. It will still be avaialble at the
QEmu level, I think it makes some sense in other environment even
if that's not applicable for a container based virtualization.
I think we should still provide an optional flag at the libvirt
device XML description to indicate caching on the hypervisor preference
for a device. Off by default of course.
Daniel
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