NTP in RHEL 5.6.

[mrfranchize]

I am running ntpd in RHEL 5.6.

Inside the configured ntp log file, over time I see messages stating "synchronized to IP". Is the ntp daemon doing a synchronization and if so how often? I though ntp daemon synchronizes at first start or restart. What do these messages mean ?

I know the server has not been rebooted or ntpd daemon was not bounced in over a year.


3 Jun 11:40:43 ntpd[2041]: synchronized to xx.xx.xx.xx, stratum 2
4 Jun 15:39:02 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
4 Jun 16:15:27 ntpd[2041]: synchronized to xx.xx.xx.xx, stratum 2
6 Jun 15:05:13 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
6 Jun 22:01:51 ntpd[2041]: synchronized to xx.xx.xx.xx, stratum 2
9 Jun 13:12:33 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
9 Jun 22:02:21 ntpd[2041]: synchronized to xx.xx.xx.xx, stratum 2
10 Jun 20:41:50 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
13 Jun 16:14:20 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
13 Jun 21:04:37 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
14 Jun 09:01:45 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
14 Jun 11:52:28 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
15 Jun 00:41:20 ntpd[2041]: time reset +0.427333 s
15 Jun 00:44:34 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
15 Jun 01:23:19 ntpd[2041]: time reset +0.303073 s
15 Jun 01:26:42 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
15 Jun 02:02:16 ntpd[2041]: time reset +0.286920 s
15 Jun 02:05:36 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
15 Jun 10:09:40 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
16 Jun 19:57:20 ntpd[2041]: synchronized to yy.yy.yy.yy, stratum 2
29 Jun 20:31:57 ntpd[2517]: synchronized to yy.yy.yy.yy, stratum 2
8 Jul 14:08:00 ntpd[2517]: synchronized to yy.yy.yy.yy, stratum 2
16 Jul 09:20:23 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2
16 Jul 18:48:32 ntpd[2559]: time reset +0.343125 s
16 Jul 18:51:52 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2
16 Jul 19:29:23 ntpd[2559]: time reset +0.290263 s
16 Jul 19:33:06 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2
20 Jul 11:17:49 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2
11 Aug 12:21:43 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2
11 Aug 18:38:03 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2
14 Sep 08:32:03 ntpd[2559]: synchronized to yy.yy.yy.yy, stratum 2

[Lazydog]

This looks normal to me. Polling is not only done when you start/restart your computer.
Poll interval is automatically controlled and can vary between 64 and 1024 seconds.
Look at the output of the ntpq command to see the interval for your computer.

ntpq -p

Here is some READING for you.