You could write a controller that monitors link utilization and enables QoS.
On Sat, May 14, 2016 at 02:02:39PM -0700, Aravind Ganesan wrote: > Ben > Thanks for your reply. > I am just worried about the case when the link is congested. if possible, > can you please describe how to do it in the controller > > Thanks > > > On Sat, May 14, 2016 at 1:58 PM, Ben Pfaff <b...@ovn.org> wrote: > > > You could use a controller. > > > > You are probably wasting your effort, though, because the QoS in use > > probably does not do anything if the link is not congested. > > > > On Sat, May 14, 2016 at 12:22:21PM -0700, Aravind Ganesan wrote: > > > Ben, > > > Thanks for your reply. > > > So is there a possible indirect method to achieve it? > > > In my case too the QoS need not do anything when there is no congestion, > > > but I want to invoke them when there is congestion. I am able to get the > > > network statistics, but am unable to proceed after that. > > > It would be helpful if you could suggest something. > > > > > > Thanks > > > > > > On Sat, May 14, 2016 at 11:51 AM, Ben Pfaff <b...@ovn.org> wrote: > > > > > > > On Fri, May 13, 2016 at 11:19:19PM -0700, Aravind Ganesan wrote: > > > > > I have created QoS classes, and am able to separate the traffic > > based on > > > > > source address. > > > > > What I want to do now is enable QoS classes only when link is > > congested. > > > > > For example, if there are 3 hosts, h1, h2, h3, connected by single > > switch > > > > > s1. Suppose h1 is sending file to h3. Simultaneously h2 wants to > > send > > > > file > > > > > to h3. I measure the bandwidth of s1->h3. If it is less than say 100 > > > > Mbps, > > > > > I invoke QoS class and give priority to packets from h2. > > > > > Is it possible to do this? > > > > > > > > OVS can't do that directly, but there's not much value in it anyway > > > > because most QoS strategies don't do anything if the link is not > > > > congested. > > > > > > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
