[ovs-discuss] OVS disconnecting from controller when under heavy load.

[Justin Pettit]

[Please don't cross-post.  I've limited the response to "discuss".]

I'm not aware of any problems in that area, but that's an awfully old release.  Do you still experience problems on more recent versions?

--Justin


On Mar 15, 2012, at 10:55 AM, junaid khalid wrote:

> Hi
> 
> I was running OVS (ovs-1.1.2 in kernel mode, on a core i7 machine with 4GB of RAM) under several Gbps of load. I noticed some unexpected behavior; OVS would disconnect from Controller (NOX 0.9 zaku) under heavy load conditions and re-establish the connection when the load was reduced (the behavior did not have a particular pattern but seemed to become rare for under 2Gbps). The reason for the disconnection was a lack of echo-request/reply packets being exchanged between the controller and ovs.
> Each time the experiment was run, ovs had about 10k flows in its flow table (added pro-actively) and the controller was not being invoked for packet-in events (all the relevant flows had already been written). I was unable to find any relevant posts on the mailing lists regarding similar issue (controller disconnecting when ovs is under gigabits per second of traffic). I have no idea what could be causing this behavior, and hope that someone can enlighten me.
> 
> Regards,
> junaid
> 
> _______________________________________________
> discuss mailing list
> discuss at openvswitch.org
> http://openvswitch.org/mailman/listinfo/discuss