there are known problems, WHEN I/O "native" and cache=writethrough.
On I/O "native" put cache to "none" otherwise your data can get broken.
Check Redhat Pages for that.
marko
Am 2013-02-13 10:56, schrieb Sylvain Bauza:
Hi Philipp,
Indeed. Qemu-kvm.1.0 is pretty old but this version is the stable one
for Ubuntu Precise (12.04 LTS).
No backport is available for later versions, I need to install by
hand.
Do you know if qemu-1.3 (with KVM support) is fully compatible with
qemu-kvm.1.0 ?
As I'm relying on Openstack Nova for upper hypervisor layer, it needs
to be 100% matching.
Thanks,
-Sylvain
Le 13/02/2013 08:21, Philipp Hahn a écrit :
Hello,
On Tuesday 12 February 2013 15:30:37 Sylvain Bauza wrote:
We currently run Openstack Essex hosts with KVM-1.0 (Ubuntu 12.04)
instances with qcow2,virtio,cache=none
The default answer is to update your qemu-kvm version: 1.0 is very
old, qemu-
kvm is fully merged into upstream qemu, which is currently preparing
its 1.4
release.
There have been many fixes to qemi and the qcow2 handling: I know of
at least
one serious problem not fixed up to qemu-1.1.
Sincerely
Philipp
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