[ovs-dev] [PATCH ovn branch-21.09 0/3] Improve Load Balancer performance.

Numan Siddique numans at ovn.org
Wed Nov 3 20:11:49 UTC 2021


On Tue, Nov 2, 2021 at 3:35 PM Dumitru Ceara <dceara at redhat.com> wrote:
>
> On 11/2/21 8:30 PM, Dumitru Ceara wrote:
> > This series backports the load balancer performance improvements to
> > stable branch-21.09.
> >
> > - patch 1/3 changes the way ARP responder flows are generated for load
> >   balancer VIPs, using an address set, making SB updates incremental
> >   and also reducing memory usage on the SB server side.
> > - patch 2/3 introduces a new feature, Load_Balancer_Group, which
> >   simplifies load balancer configuration in large scale scenarios and
> >   at the same time improves performance due to the large reduction in
> >   database refereces between rows.
> > - patch 3/3 is a follow up fix of a bug originally introduced by
> >   patch 1/3.
> >
> > Usually new features and performance fixes are not to be backported to
> > stable branches, however due to the (mis)alignment of upstream and
> > downstream release schedules, and due to the fact that ovn-kubernetes
> > requires a database table to be part of a schema that's tagged in a
> > release in ovn-org/ovn repo, if load balancer groups would be available
> > only starting with v21.12.0 then downstream ovn-kubernetes (and OpenShift)
> > will not be able to consume the feature for two release cycles (~6 months).
> >
> > On the other hand the feature itself is quite contained, doesn't break
> > backwards compatibility, and, when used, hugely improves some CMSs
> > (OpenShift) load balancer use cases.
> >
> > Dumitru Ceara (3):
> >       northd: Use address sets for ARP responder flows for VIPs.
> >       nb: Add support for Load_Balancer_Groups.
> >       northd: Always generate valid load balancer address set names.
> >
> >  NEWS                  |    2
> >  northd/northd.c       |  334 +++++++++++++++++++++++++++++++++----------------
> >  ovn-nb.ovsschema      |   24 +++-
> >  ovn-nb.xml            |   37 +++++
> >  tests/ovn-northd.at   |  293 ++++++++++++++++++++++++++++++++++---------
> >  utilities/ovn-nbctl.c |    3
> >  6 files changed, 517 insertions(+), 176 deletions(-)
> >
>
> Adding OVN maintainers explicitly in order to discuss the possibility of
> including this in a v21.09.1.

+1 from me for the backports.

Numan

>
> Regards,
> Dumitru
>
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