Kumar, How large of a deployment are you considering it for? We've run Neutron in a fairly large environment (10k+ nodes) for a year now and have learned some interesting lessons. We use a modified Openvswitch plugin and as such have no experience with the Nicira plugin. I think the largest single problem that we have as it pertains to scalability are the race conditions in neutron-server. Allocating IPs, network, ports etc tend to have some racey behaviors. I feel like many of these issues are being addressed by neutron developers, but also Neutron is very viable for large-scale production today. For instance most of the race conditions that I mention can be averted if you aren't writing to the database concurrently. You could designate ONE neutron-server as the "write" server and the rest as "read", it's a little tricky to do because you have to have a router in front of them all or reroute requests, but the API set is not very large so a very doable task. That being said, in our environment we use a single neutron-server with another standing by as backup. It's not as performant as we'd like it to be, but it hasn't stopped us from growing so far.
-Mike Wilson P.S. There is a presentation from the Portland summit that myself and Jun Park did. In it we talk about some of the issues around scale although neutron (quantum at the time) is a smaller part of the talk. : http://www.openstack.org/summit/portland-2013/session-videos/presentation/using-openstack-in-a-traditional-hosting-environment . On Wed, Oct 2, 2013 at 11:04 AM, Kumar <chvs...@gmail.com> wrote: > Hi, > We are considering to run openstack Neutron in a large scale deployment. > I would like to know community experience and suggestions. > > To get to know the quality I am going through neutron bugs( I assume that > is the best way to know the quality) > Some of them are real concerning like below bugs > https://bugs.launchpad.net/neutron/+bug/1211915 > https://bugs.launchpad.net/neutron/+bug/1230407 > https://bugs.launchpad.net/neutron/+bug/1200001 > > The bug 1211915 is raised for simple tempest tests,whats about huge > deployments? > I am told even vendor neutron plugins too have similar issues when we > create tens of instances in single click on horizon. And people see too > many connection timeouts in quantum service logs with vendor plugins as > well. > > I was told that some were struck with nova-network as there is no support > yet to migrate Neutron and they could not take advantage of new network > services. > > I would like to know community thinking on the same. Please note that I am > not concerned on fix availability. > > Thanks, > -Kumar > > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > >
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