[ovs-discuss] [OVN] Incremental processing patches

Justin Pettit jpettit at ovn.org
Tue May 7 16:56:13 UTC 2019

Hi, Daniel.  I don't think this is a bad approach.  However, at the moment, Han's work is with ovn-controller and ddlog is with ovn-northd.  We've talked about using ddlog in ovn-controller, but there's been no work in that direction yet.  At this point, I think Han's patches should be evaluated on their own merits and not held back for ddlog.  (Unless someone is looking to run with it.  :-) )


> On May 7, 2019, at 9:04 AM, Daniel Alvarez Sanchez <dalvarez at redhat.com> wrote:
> Hi folks,
> After some conversations with Han (thanks for your time and great
> talk!) at the Open Infrastructure Summit in Denver last week, here I
> go with this - somehow crazy - idea.
> Since DDlog approach for incremental processing is not going to happen
> soon and Han's reported his patches to be working quite well and seem
> to be production ready (please correct me if I'm wrong Han), would it
> be possible to somehow enable those and then drop it after DDlog is in
> a good shape?
> Han keeps rebasing them [0] and I know we could use them but I think
> that the whole OVN project would get better adoption if we could have
> them in place in the main repo. The main downside is its complexity
> but I wonder if we can live with it until DDlog becomes a reality.
> Apologies in advance if this is just a terrible idea since I'm not
> fully aware of what this exactly involves in terms of technical
> complexity and feasibility. I believe that it'll make DDlog harder as
> it'll have to deal with both approaches at the same time but looks
> like the performance benefits are huge so worth to at least consider
> it?
> Thanks a lot!
> Daniel
> [0] https://github.com/hzhou8/ovs/tree/ip12_rebased_mar29
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