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Full Discussion: Script to detect time drift
Operating Systems HP-UX Script to detect time drift Post 303017325 by rbatte1 on Monday 14th of May 2018 07:32:47 AM
Old 05-14-2018
You would have to do this on the client side. If you have a problem with your NTP time server, then treat that as the client and get it to align to another trusted clock, be that a radio-clock or internet address.

You can also use ntpdate -d refer-server to get a time difference from the reference server (which must be offering the NTP service, of course)

if the clock drift is too far, then you would need to step the clock on the local server to match something like this:-
  • Check the offset with - ntpdate -d ref-server
  • Stop the local NTP service in the normal way
  • Step the clock into sync - ntpdate ref-server
  • Start the local service in the normal way
  • Check the offset with - ntpdate -d ref-server

You should see debug information when you use the -d flag and the last line gives you the agreed offset from the reference server or servers (just a space separated list)


If you can't have the NTP client running all the time because your application doesn't like the clock going backwards even by tiny fractions of a second, you would probably need to schedule and idle minute to step the clock each day. You can run ntpdate -d ref-server at any time and just use the last line to show you the current offset from the trusted clock.



I hope that this helps,
Robin
 

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LEARN ABOUT OSF1

timedsetup

timedsetup(8)						      System Manager's Manual						     timedsetup(8)

NAME

       timedsetup - Performs initial setup of the time server daemon (timed).

SYNOPSIS

       /usr/sbin/timedsetup

DESCRIPTION

       The timedsetup command is an interactive script that can be used to perform initial time service configuration for your system.

       By  default,  timed  does  not start at boot time.  The timedsetup script asks if you want the timed daemon to be started at boot time, and
       prompts you for any options to pass to the timed daemon whenever it is invoked.	The script then starts the timed daemon.

       For more information on the timed options, see the timed(8) reference page.

									  Note

       The timed daemon is provided for compatibility.	Tru64 UNIX also provides support for the Network Time Protocol	(NTP)  through	the  xntpd
       daemon.	 Compaq  recommends  you use NTP for time synchronization.  If your system is configured to run NTP, the timedsetup command passes
       the -E and -M options to the timed daemon by default.

       If you plan to run both the timed daemon and NTP, you should configure NTP first.

RESTRICTIONS

       In configurations with two or more hosts each connected to the same two or more subnetworks, only one of the host can run  the  timed  with
       the -M option.

FILES

       Specifies the command pathname The timed startup and shutdown script Specifies timed parameters pertinent to a specific system

SEE ALSO

       Commands: timed(8), xntpd(8)

																     timedsetup(8)
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