On 01/01/2013 06:12, [email protected] wrote:
I'm using [0123].ntp.pool.org with my two internet accessing NTP servers. I
missed the ball drop on new years because I was trying to figure out why Nagios
was complaining about my NTP servers dropping the two internet accessing
daemons and prefering each other, resulting in higher and higher strata
numbers. My first reaction was to restart all these non-internet accessing
daemons, assuming they'd reset to the two internet-accessing daemons, then
honor the low stratum numbers and be sane.
Then I noticed my two internet accessing daemons were reporting that they were
within milliseconds of their internet peers (multiple cnames sending them to a
non-overlapping set of real servers), BUT almost exactly one second different
from each other. I first noticed this at a little after midnight, but it went
away by about 00:40 - I don't have status logs to say exactly when.
Huh?
My own plots show no glitch:
http://www.satsignal.eu/mrtg/performance_ntp.php
Was something sending a Leap Second flag? You could check with my
program here:
http://www.satsignal.eu/software/net.htm#NTPLeapTrace
Recent versions of NTP should ignore a single leap-second flag, earlier
versions may set a leap second even if only one of the upstream servers
is indicating thus.
Happy New Year and thanks to all those who have helped me in the past!
--
Cheers,
David
Web: http://www.satsignal.eu
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