<div dir="ltr">after a bit of playing with the system, I found a nice workaround:<div>I added a host route on each host:</div><div><br></div><div># route add -host 10.100.101.101 gw 172.22.22.1</div><div>and on the other one:</div>
<div># route add -host 10.100.101.100 gw 172.22.22.2</div><div><br></div><div>where 10.100.101/24 is the slow network and 172.22.22/24 is the fast network.</div><div>migration now works through the fast link, with nothing changed in ovirt's configuration.</div>
<div><br></div><div>Yuval<br><br><div class="gmail_quote">On Sun, Jan 6, 2013 at 11:49 PM, Dan Kenigsberg <span dir="ltr"><<a href="mailto:danken@redhat.com" target="_blank">danken@redhat.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="HOEnZb"><div class="h5">On Sun, Jan 06, 2013 at 10:08:48PM +0200, Yuval M wrote:<br>
> Hi,<br>
> I'm running the following setup:<br>
> 2 hosts,<br>
> each has 2 physical NICs,<br>
> the first NIC (which is bridged to ovirtmgmt) is a 100Mbps ethernet card<br>
> connected to a switch (and to the internet)<br>
> the 2nd NIC is a fast Infiniband card which is connected back-to-back to<br>
> the other host.<br>
><br>
> both links are running fine, and I managed to have the 2nd host mount the<br>
> storage via the fast link.<br>
> The problem is that VM migration takes place over the slow link.<br>
><br>
> How do I configure the cluster so that the migration uses the fast link?<br>
> I've already created a network using the web interface. the migration still<br>
> uses the slow link.<br>
<br>
</div></div>Currently, oVirt always uses the ovirtmgmt network for migration data,<br>
even though libvirt already supports choosing a non-mananagement IP<br>
address for that. So I do not see how you could use the Infiniband card<br>
for migration without defining ovirtmgmt there, or with serious vdsm<br>
hacking.<br>
<br>
When I'm saying "serious", I mean something in the lines of<br>
(the untested!) <a href="http://gerrit.ovirt.org/10696" target="_blank">http://gerrit.ovirt.org/10696</a> .<br>
<br>
To use this patch, you would first need to define a non-VM network over<br>
the Infiniband connection on both hosts, and provide them with IP<br>
address. Then, the name of this network should be passed as the value of<br>
a VM custom propery call 'mignet'.<br>
<br>
It would be great if you can try it out and debug it and/or comment on<br>
it.<br>
<span class="HOEnZb"><font color="#888888"><br>
Dan<br>
<br>
</font></span></blockquote></div><br></div></div>