[c-nsp] Cheap BGP router for ~20k prefixes

[Pshem Kowalczyk]

Hi,

We've changed the following settings:

1. Set Latency Sensitve to High  (
http://www.vmware.com/files/pdf/techpaper/latency-sensitive-perf-vsphere55.pdf
)
2. ethernetX.coalescingScheme = "disable" (for all interfaces, but
management on the VM)
3. Pin down memory and CPU (we run a 4 vCPU setup with 4G of RAM)

That gave us a significant boost in PPS - about 80% increase under the same
CPU load.
I have noticed though, that the BFD sessions (there is about 15 of them on
the device) have flapped a few times in the last 2 weeks, so something
still requires tuning (the BFD is at 200ms x 3).
I think the next step will be to try VM-FEX (which can't be ran on the same
hardware that has already a N1000V, which is a pain). If we find the time
we'll also test this under KVM.

kind regards
Pshem


On Fri, 8 May 2015 at 19:50 Mark Tinka <mark.tinka at seacom.mu> wrote:

>
>
> On 8/May/15 02:17, Robert Hass wrote:
> > Hi
> > Can you give some URL to recommended ESXi tweaking ?
> > Or just write some recommendations here. I'm happy to test CSR on my
> > configuration
> > but I also would like apply tweaking tips first.
>
> The ESXi tweaking I recall doing was disabling power management to
> ensure high performance against the hardware.
>
> The other bit was building a vSwitch for each port, as the default for
> ESXi is to put all of the server's ports in the same vSwitch. But this
> is less of a performance tweak than just good security.
>
> It would be nice to hear what else Pshem did to his VM.
>
> Mark.
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