Yes, we've done some testing. With an oVirt VM running on a host using 10Gb ethernet copying data to a physical machine also using 10Gb ethernet we don't see network utilization exceed 800Mbits or so. A bit of research online yields some experimentation done by others who used SR-IOV to achieve 10Gb from a VM.

I'm not sure where the bottleneck is, possibly in the VirtIO driver.

Beau

On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <dholler@redhat.com> wrote:

Is there an indication that the VMs will not take advantage of 10Gb?

On Thu, 7 Dec 2017 15:27:25 -0700
Beau Sapach <bsapach@ualberta.ca> wrote:

> Hello everyone,
>
> I see here:
> https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that
> version 4.2 will have OVN support. Does anyone know if this will
> allow VMs to take advantage of 10Gb networking without needing SR-IOV?
>
>

Beau Sapach

System Administrator | Information Technology Services | University of Alberta Libraries

Phone: 780.492.4181 | Email: Beau.Sapach@ualberta.ca