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Operating Systems Linux Red Hat NTPSTAT shows clinet is Unsynchronised Post 302997108 by Anjan Ganguly on Monday 8th of May 2017 05:23:51 AM
Old 05-08-2017
After a lot of brainstorming and consulting with some NTP expert I found the following.
Code:
 2 May 17:00:28 ntpd[2178]: synchronized to 172.31.64.10, stratum 1
 2 May 17:36:39 ntpd[2178]: time reset -0.313640 s
 2 May 17:37:13 ntpd[2178]: synchronized to 172.31.64.10, stratum 1
 2 May 17:52:12 ntpd[2178]: time reset +0.491725 s
 2 May 17:52:31 ntpd[2178]: synchronized to 172.31.64.10, stratum 1
 2 May 18:08:34 ntpd[2178]: time reset +0.283749 s
 2 May 18:09:49 ntpd[2178]: synchronized to 172.31.64.10, stratum 1
 2 May 18:50:31 ntpd[2178]: time reset -0.312960 s
 2 May 18:51:34 ntpd[2178]: synchronized to 172.31.64.10, stratum 1
 2 May 19:06:30 ntpd[2178]: time reset +0.481487 s

NTP expert comment:
Code:
This means whenever the system time is synchronized, a few minutes late
the time offset is again so large (> 128 ms) that ntpd is unable to
correct it smoothly. So it steps the system time ("time reset") and
restarts from scratch.

So this looks like the timekeeping in your Linux system is broken, i.e.
the system time increases not continuously at the same rate.

NTP is unable to fix some broken timekeeping. Only if the timekeeping is
stable, NTP can determine the current offset, the time drift, and adjust
the system time smoothly so that the time offset is continuously as
small as possible.

I don't thing there's a problem with the package exchange. It's just the
Linux system time which has too much jitter, i.e. changes quickly from
increasing too faster to increasing too slow. You need to fix that
first, otherwise you are out of luck.

Now the question is How to fix the "BROKEN TIMEKEEPING OF LINUX System"?
Can some body help me out?

Last edited by Corona688; 05-08-2017 at 12:38 PM..
 

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ntp-wait(1)							   User Commands						       ntp-wait(1)

NAME
ntp-wait - Wait for ntpd to stabilize the system clock SYNOPSIS
ntp-wait [-flags] [-flag [value]] [--option-name[[=| ]value]] All arguments must be options. DESCRIPTION
ntp-wait will send at most num-tries queries to ntpd(8), sleeping for secs-between-tries after each status return that says ntpd(8) has not yet produced a synchronized and stable system clock. ntp-wait will do this quietly, unless the -v flag is provided. This can be useful at boot time, to delay the boot sequence until after ntpd -g has set the time. OPTIONS
-n number, --tries=number Number of times to check ntpd. This option takes an integer number as its argument. The default number for this option is: 100 The maximum number of times we will check ntpd to see if it has been able to synchronize and stabilize the system clock. -s secs-between-tries, --sleep=secs-between-tries How long to sleep between tries. This option takes an integer number as its argument. The default secs-between-tries for this option is: 6 We will sleep for secs-between-tries after each query of ntpd that returns "the time is not yet stable". -v, --verbose Be verbose. By default, ntp-wait is silent. With this option, ntp-wait will provide status information. -?, --help Display usage information and exit. -!, --more-help Pass the extended usage information through a pager. -v [{v|c|n --version [{v|c|n}]}] Output version of program and exit. The default mode is `v', a simple version. The `c' mode will print copyright information and `n' will print the full copyright notice. EXIT STATUS
One of the following exit values will be returned: 0 (EXIT_SUCCESS) Successful program execution. 1 (EXIT_FAILURE) The operation failed or the command syntax was not valid. 70 (EX_SOFTWARE) libopts had an internal operational error. Please report it to autogen-users@lists.sourceforge.net. Thank you. AUTHORS
Harlan Stenn NOTES
This document corresponds to version 4.2.8p13 of NTP. This manual page was AutoGen-erated from the ntp-wait option definitions. ntp (4.2.8p13) 20 Feb 2019 ntp-wait(1)
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