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?

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(a)redhat.com&gt; 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(a)ualberta.ca&gt; 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? > > > > > >

On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach <bsapach(a)ualberta.ca&gt; wrote: > 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. > Are you using multiple TCP streams, jumbo frames, threads, etc.?

Y. > 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(a)redhat.com&gt; > 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(a)ualberta.ca&gt; 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 <(780)%20492-4181> | Email: > Beau.Sapach(a)ualberta.ca <Beau.Sapach(a)ualberta.ca&gt;* > > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > >