Brian Inglis wrote:
You can start ntpd with -g option which allows it to step your system time once, when it first starts; using iburst "pool hk.ntp.pool.org iburst" will allow the correct offset to be set within about 16s after startup. Thereafter it will stay within +/-128ms of UTC; after it has settled, that should be about +/-10ms off UTC. As another poster said, adding "pool asia.ntp.pool.org iburst" may improve your offset. Once it gets to long poll intervals, it actually improves the drift compensation more, and reduces the offset further.
That's the theory how it should work, and how it does work on non-Windows systems.
In practice ntpd v4.2.6p5 may settle or not at all under Windows Vista and newer due to Windows bug where Windows doesn't accept small tick adjustments. See my the link in my other post.
Also, *under Windows* the offset usually *increases* if you let the polling interval ramp up. See
http://people.ntp.org/burnicki/windows/ntpd-4.2.7-Win7-poll4-max.pdf where the polling interval is allowed to be ramped up, versus http://people.ntp.org/burnicki/windows/ntpd-4.2.7-Win7-poll4-6.pdf where the polling interval is limited to 6. Martin -- Martin Burnicki Meinberg Funkuhren Bad Pyrmont Germany _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
