Measure Clock Drift On Linux Server, PTP/NTP Clock Reference

Question

Guys,

I got a task to measure the clock drift between a linux server and an "accurate" NTP/PTP server.

Any suggestion on this?

Thanks

Use `ntpdate` in debug mode (i.e. don't actually update the time). Also, this isn't really about programming... — twalberg, Jul 22 '16 at 19:09

score 0 · Answer 1 · edited Jun 30 '17 at 18:50

There is an easy way to do this that I used recently.

On your linux server on which you want to monitor drift you set up the NTP config file with a single server entry to your "accurate NTP/PTP server" and include the server option noselect.

When you run NTP it will not discipline the clock but the offset can be viewed using e.g. nptq -pn or -c rl and you can use that to determine the drift over time.

Measure Clock Drift On Linux Server, PTP/NTP Clock Reference

1 Answers1