Here are some more details from the ntp logging - ntp_mon peerstats.. It's doesn't seem to be a interrupt creep, as the server is maintaining time properly all day, except for 30 mins each day.
So I guess it's a program I need to look for, any ideas as to what I should look for ? Regards Mike. 55449 8029.459 10.7.100.27 9634 -0.002910845 0.000745249 0.014838494 0.000182297 55449 8043.473 10.7.100.28 9434 0.001379801 0.000747673 0.007061521 0.000157649 55449 8299.732 10.7.100.28 9434 0.001414736 0.000731931 0.005022575 0.000115537 55449 8555.991 10.7.100.28 9434 0.001414736 0.000731931 0.007541755 0.000068723 55449 8813.250 10.7.100.28 9434 0.001414736 0.000731931 0.009477517 0.000031755 55449 9056.494 10.7.100.27 9634 -0.002179427 0.000873918 0.014844999 0.000731418 55449 9070.508 10.7.100.28 9434 0.001414736 0.000731931 0.010334099 0.000040580 55449 9239.820 10.7.100.28 9434 0.001414736 0.000731931 0.010206775 43.473413580 55449 9498.080 10.7.100.28 9034 86.948205334 0.000737279 0.004326775 75.298106172 55449 9754.338 10.7.100.28 9034 86.948171299 0.000713359 0.003715583 61.480627575 55449 9994.579 10.7.100.27 9034 86.945547774 0.000796132 0.014833280 86.947727202 55449 10011.597 10.7.100.28 9034 86.948171299 0.000713359 0.005644196 43.473347566 55449 10029.614 10.7.100.28 9034 86.947986361 0.000411148 0.002904350 38.883661440 55449 10046.631 10.7.100.28 9034 86.947986361 0.000411148 0.001597708 35.495764148 55449 10062.648 10.7.100.28 9034 86.947984728 0.000403990 0.000880227 32.862691288 55449 10078.664 10.7.100.28 9034 86.947984728 0.000403990 0.000680422 0.000158151 55449 10093.679 10.7.100.28 9034 86.947984728 0.000403990 0.000700578 0.000124794 55449 10111.696 10.7.100.28 9034 86.947984728 0.000403990 0.000636477 0.000092856 55449 10126.712 10.7.100.28 9034 86.947984728 0.000403990 0.000652824 0.000060522 55449 10144.730 10.7.100.28 9034 86.947984728 0.000403990 0.000884035 0.000005692 55449 10160.746 10.7.100.28 9034 86.947984728 0.000403990 0.000954348 0.000006893 55449 10263.711 10.7.100.28 8034 0.000000000 0.000000000 0.000000000 4.000000000 55449 10265.714 10.7.100.28 9044 -0.000018194 0.000384368 7.937500957 0.000000954 55449 10280.728 10.7.100.28 9044 -0.000029944 0.000349054 3.937557685 0.000011750 55449 10298.746 10.7.100.28 9044 -0.000029944 0.000349054 1.937760424 0.000031646 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Martin Burnicki Sent: Wednesday, 8 September 2010 5:26 PM To: [email protected] Subject: Re: [ntp:questions] NTPd looses sync regularly / 12 hour intervals. Michael, Michael Nielsen wrote: > The logs on the systems that have problems usually show the following > pattern > > > Sep 7 17:43:48 sn ntpd[11721]: synchronized to 10.7.100.28, stratum 2 > Sep 7 17:57:51 sn ntpd[11721]: time reset +71.784598 s > Sep 7 17:59:10 sn ntpd[11721]: synchronized to 10.7.100.27, stratum 2 > Sep 8 05:29:11 sn ntpd[11721]: no servers reachable > Sep 8 05:34:37 sn ntpd[11721]: synchronized to 10.7.100.28, stratum 2 > Sep 8 05:35:52 sn ntpd[11721]: time reset +74.977115 s > Sep 8 05:36:41 sn ntpd[11721]: synchronized to 10.7.100.28, stratum 2 This looks like some other program is called in cyclic intervals (~12 hours, run by cron?) to simply set the time to match the time of some external time source. After this has happened the offset and jitter figures reported by "ntpq -p" should increase drastically, and about 15 minutes (or a certain number of polling intervals) after the system time has been stepped by the other program the time is stepped back by ntpd, causing the "time reset" messages. If the reference time source used by the other program continuously drifts apart from the reference time source(s) used by ntpd then you should see the amount of time reported by the "time reset"s increase or decrease continuously. Martin -- Martin Burnicki Meinberg Funkuhren Bad Pyrmont Germany _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
