Jesse, thanks a lot for the insights, Kind regards, Atam
On Wed, Mar 27, 2013 at 6:41 PM, Jesse Gross <[email protected]> wrote: > On Wed, Mar 27, 2013 at 6:06 AM, Atam <[email protected]> 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 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. >
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