On 2015-10-05T14:06:22-0400, Dan Geist <[email protected]> wrote: > Greetings, all. I've been challenged to show some evidence that ntpd > running on a VM (as a stratum 2 server in a company-internal pool) > really does perform differently than on bare metal. Can anyone point > me to any non-anecdotal scenarios or tests that might help > demonstrate the performance/accuracy differences? One thought I had > was to make a small cluster of several VM servers and several bare > metal ones and add all of them to some clients and simply observe > deltas in ntpq stats. Does anyone know of other good ways to get > some "apples-to-apples" comparison data?
Just anecdotal evidence, but with a properly configured VM, I think you might have a hard time showing any difference. I see no difference between my high-traffic Linode KVM NTP pool server and my bare metal NTP servers. http://www.pool.ntp.org/user/kenyon http://kenyonralph.com/munin/time-day.html NTP performance depends a lot more on network conditions than whether it's a VM. -- Kenyon Ralph
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