> On Aug 18, 2016, at 8:46 AM, nickcooper-zhangtonghao > <nickcooper-zhangtong...@opencloud.tech> wrote: > > Add "timeout" column in MAC_Binding to support cache aging. > The ARP/NA cache expiring will be removed and logical router > send ARP/NS to get IP-MAC binding.
This would be great to fix and is mentioned as a todo item in "ovn/TODO". Unfortunately, I don't think this approach will work. It would require that all systems have synchronized clocks, since each chassis is running its own instance of ovn-controller. If one chassis adds an MAC_Binding entry, it's very likely that a different one will have a different view of the time, so these entries will have somewhat random lifetimes. Also, let's say that every one has a synchronized clock, then they'll all try to modify these same entries at roughly the same time, which is a lot of wasted overhead. I think this time tracking needs to be done centrally. One option mentioned in the todo list is to add the concept of time to the database itself. --Justin _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
