On Mar 27, 2013, at 12:41 PM, Jesse Gross <je...@nicira.com> wrote: > On Wed, Mar 27, 2013 at 6:06 AM, Atam <ata...@gmail.com> wrote: >> Hi all, >> >> OVS is a software solution switch as i understand. It is able to utilize >> offloading features of the Ethernet adapter I read somewhere... >> >> - What features are those? Is it desirable to invest in 10GB adapters with >> full TCP chimney support like Emulex (OCe11102) or Broadcom (57810S) ? Or is >> Intel intelligent offloading the same for OVS? >> - Is OVS using virtual function available on the adapter (now or in the >> future)? >> e.g. Intel x540 adaters support 64 VF's per port. Around the same for >> Emulex and Broadcom. >> But Solarflare (SFN5121T) supports 254 VF's. Will that have an effect on >> OVM? > > OVS does not use any of these. Most of them have implications for the > entire stack, so if you are using them currently (I suspect you are > not) you need to evaluate your requirements. > For VFs, there should be nothing special about how OVS uses those. The VFs each show up as a separate interface on the Linux host, and you can add those to OVS bridges as you would a normal physical link. Now if you want OVS to somehow orchestrate the VF creation process or something, that's outside the current scope of OVS.
Thanks, Kyle >> - For best performance and minimal CPU overhead is there something else >> (not mentioned above) I should look into when comparing 10GB nics? > > The actual implementation of the NIC, stateless offloads, driver > quality, etc. will all have an impact on performance. You should > evaluate different cards with your workload > >> - If i use OVS on a compute node with KVM as hypervisor, what will decide >> the maximum number of virtual nic's supported? >> e.g. My goal is to have max 100 vps with each max 4 vnics = max 400 vnics >> on 1 10GB port/adapter... which is why i want the best adapter for this >> purpose...with maximum offloading of OVS. > > This is affected by many factors and not significantly by OVS. > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
