"discuss" <discuss-boun...@openvswitch.org> wrote on 07/14/2016 11:34:17 AM:
> From: "Alexey I. Froloff" <ra...@raorn.name> > To: discuss <discuss@openvswitch.org> > Date: 07/14/2016 11:34 AM > Subject: [ovs-discuss] OVN scalability and HA > Sent by: "discuss" <discuss-boun...@openvswitch.org> > > Greetings, > > We're about to use OVN in a large production environment :-) > > Well, not really "production" production, but having fun testing > it, looking if we can use it in such way. While functionality is > good for us, two question appear - scalability and availability. > > What are current OVN (as of master branch) limitations in > hypervisors in one segment (one SBDB), lswitches in one segment, > lports in one lswitch, etc? We've had folks here collaborating with folks at ebay on measuring those questions - I point you at [1] for the scale test repository. As far as current numbers and efforts, I point you at the Austin openstack presentation [2]. > About clustering. Since ovn-northd does not support clustering > by itself, it is possible to create active-passive HA cluster > ising third-party clustering software. NBDB and SBDB are > replicated using ovsdb mechanisms and clustering software ensures > that there are one copy of ovn-northd daemon is running. Is this > correct? Can ovn-controller's automatically switch to different > database server? > > What clustering/HA/scalability features are planned for 2.6.0 > release? There has been a lot of discussion around replacing ovsdb with etcd and using RAFT for active/active ovsdb clustering (please look through the ML archives for specific references). At this point, I don't believe those efforts will be landing in 2.6.0, so we've had some folks here working on an active/passive HA solution on top of the OVSDB replication feature that recently merged. I'm not 100% up to date on it, but I know that there are issues, so I'll see what I can do about getting those in the know to contribute to this thread... Ryan [1] https://github.com/openvswitch/ovn-scale-test [2] https://www.openstack.org/videos/video/practical-ovn-architecture-deployment-and-scale-of-openstack-networking
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