Re: virtio localdisk performance

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On Fri, Oct 14, 2011 at 9:33 AM, Stefan Hajnoczi <stefanha@xxxxxxxxx> wrote:
> The next step is trying QEMU's -drive aio=native, which uses Linux AIO
> instead of a custom userspace threadpool for doing I/O.  It is usually
> faster.  The libvirt domain XML is:
>
> <disk ...>
>    <driver name='qemu' type='raw' io='native'>

Will do so.

Thanks for your help :D !

> If you have the time, trying a recent kernel and qemu-kvm could yield
> better results.  Your guest configuration is already reasonable and I
> would choose a similar setup.
>
> You mentioned vhost - it's an in-kernel virtio implementation but
> currently only available for virtio-net in a kernel release.  There are
> experimental vhost-blk patches on the kvm mailing list but they are not
> merged and folks are currently playing with them to see how much
> performance could be gained.

Good to know

Thanks,
Benoit.
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