NTP synchronisation

[Neil Wilson_2]

Hi everyone,

I've configured NTP and started xntpd but the time sync'd straight away, jumping forward 10 mins or so. Luckily this is a DR system and there are no database on it!

Anyway I seem to recall there is a way to stop "instant" synchronisation and have the server sync over a slower period of time. Any ideas what that is ? (i have /etc/ntp.drift created, no values in it).

NW

[Devender Khatana]

Hi,

The time of the server which got synced was probably more than the time of the server you synced to. This is the normal behaviour in this case and before starting the application ( Databases) you should ensure that time has got synced. If the synchronization is done in reverse order then I suppose it will go slow only.

HTH,
Devender

[A. Clay Stephenson]

If you start the xntpd daemon with the "-x" option, it will alwaqys slew the time rather than doing a step adjustment.

[Andrew Merritt_2]

Have you tried 'man xntpd'? There's a discussion there of the way the time is adjusted when the '-x' (SLEW) option is selected.

Andrew

[Steven E. Protter]

Jumping forward is not usually a problem, even for production Database servers.

Jumping backward is a potential system crashing, database corrupting disaster waiting to happen.

I think the -x option is the best way to go. Should be configurable in the conf file or if it uses a parameter file in /etc/rc.config.d/

SEP