[ovirt-users] Using 10gb vNIC/vbridge into VM is possible?

[Dan Kenigsberg]

On Sun, Dec 21, 2014 at 10:58:17AM +0200, Lior Vernia wrote:
> 
> 
> On 19/12/14 22:19, Amador Pahim wrote:
> > On 12/19/2014 02:08 PM, Darrell Budic wrote:
> >> I tried a quick iperf test a while back and got 3-4Gb/sec between a
> >> pair of VMs on separate hosts with a 10G infrastructure, no real
> >> tuning and no SRIOV. That met my needs so I didn’t try anything
> >> further. If you were aiming for 10G for all, you’d want to work on
> >> SRIOV I imagine, but they get pretty good performance even without it.
> > 
> > Maybe we should report vNIC speed as the speed of underlying NIC/Bond.
> > Even being the underlying NIC/Bond shared, it would reflect better the
> > vNIC max. speed than a fake hard coded value.
> > 
> 
> Or maybe even have it configurable from the GUI?...

... or maybe hide the "speed" as deep as possible, as it is one big lie.

It's a lie when discussing physical nics (where speed is affected by
host load or switch buffers) and it is certainly a lie when it comes to
vNICs, with over-commitment of bandwidth.