I've had some success demonstrating the better performance of bare metal stratum 2 (vs virtual KVM) under load (non-loaded is not as clear). What I need to represent better is...why.
Can someone explain in plain language (or just plain math) the "source selected, distance exceeds maximum value" state for configured sources in ntpq? I think digging into the root causes of why I'm getting this for my demonstration virtual stratum2 hosts will give me the info I need, but not without a better understanding of the algorithm used to determine it. Thanks Dan Dan Geist dan(@)polter.net ----- Original Message ----- From: "Dan Geist" <[email protected]> To: [email protected] Sent: Monday, October 5, 2015 2:06:22 PM Subject: benchmarking performance of ntpd on a virtual platform. 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? Thanks Dan Dan Geist dan(@)polter.net _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
