On Wed, Apr 06, 2016 at 11:34:05AM +0800, 张东亚 wrote: > Recently I am reading ovn source code, there are some STATES before OVN > controller shift to UPDATE_FLOWS state, one state is named CLEAR_FLOWS, > which seems clear all the flows in the ovs-vswitchd before programming new > flows, IMHO this will cause short traffic disruption for the VM hosted on > the node. > > Since in neutron l2 agent, there is now a flow persistence mechanism by > leveraging flow cookie, the effect is that when the l2 agent is restarted, > flow will be keeped if network topology is not changed. > > My question is whether ovn will implement this feature laterly or consider > this feature is useless?
It doesn't seem very valuable for OVN. It's probably better for ovn-controller to support the OpenFlow "bundles" feature so that flow table changes become atomic. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev