[ntp:questions] Tool to sample/monitor an NTP server?

Steve Kostecke kostecke at ntp.org
Mon Nov 9 23:48:53 UTC 2009

On 2009-11-09, PhilipPeake <philip.peake at gmail.com> wrote:

> A couple of these systems have had occasions where the clock has
> suddenly stepped around 10,000 seconds backwards:
> Oct 15 13:22:03 xxx xntpd[403]: [ID 261039 daemon.error] time error
> -10369.999603 is way too large (set clock manually)

I'd look for something else which is resetting the clock.

> What I want is a client to poll the NTP server (say once per second)
> and log the time received. A simple perl script can then look for any
> large jumps in the recorded time. This will tell me if the NTP server
> is really at fault.
> I am having problems finding a tool to do this. I suspect that
> something of the sort must already exist somewhere ... so if anyone
> has any suggestions, please do let me know.

Perhaps you could start with


Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/

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