Multithreading is not an issue. Main feature in ovs 1.11 which make it 'wild internet ready' is 'megaflow'. Problem is that in old mode kernel module send every new flow header to inspection to userspace daemon. And daemon send rule to kernel (ovs-dpctl dump-flows). Prior 1.11 that rule (internal rule, not 'openflow') could not contain masks. So in --flood mode it simply cause every new packet going to slow path overloading daemon. In OVS 1.11 now internal rules can contain masks (megaflow it is) and now different port numbers, source/dest IPs is no longer an issue. On 26.10.2013 12:45, Édouard Thuleau wrote: > We made some tests to know the limit of simultaneous established > connections a VM can support and we met some pb with 1.11 release > (crashes...). > > So we try the new release 2.0.0 [1] (on the advice of KVM list [2] ) > which had the support for the multiple threads for ovs-vswitchd > process. And now, we no longer have limitations from OVS. > > Ubuntu ppa packages OVS 1.11.0 and 2.0.0 are available here [3] thanks > to Sahid. > > [1] > http://git.openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob;f=NEWS;h=e0fafd08f52cc3a753cef6554251b9288cd3e6e3;hb=refs/heads/branch-2.0 > [2] http://www.mail-archive.com/kvm@vger.kernel.org/msg96823.html > [3] https://launchpad.net/~sahid-ferdjaoui/+archive/openvswitch > <https://launchpad.net/%7Esahid-ferdjaoui/+archive/openvswitch> > > Regards, > Édouard. > > > > On Sat, Oct 26, 2013 at 2:26 AM, George Shuklin > <george.shuklin at gmail.com <mailto:george.shuklin at gmail.com>> wrote: > > I my tests any ovs below 1.11 suck hardly. You can see it by > simple hping3 --flood vm.ip > > All older ovs simply can't keep pace over 10-15mb/sec. Ovs > 1.11easely operates at 8-10 gb/s. > > I don't know about is stability, but putting anything except it > with naked butt toward hostile internet is really not wize. It's > like invitation for script kiddie: DoS me please from your > cellular internet. > > > _______________________________________________ > OpenStack-operators mailing list > OpenStack-operators at lists.openstack.org > <mailto:OpenStack-operators at lists.openstack.org> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20131026/79a907ad/attachment.html>