[ntp:questions] Max time adjustment

David Woolley david at ex.djwhome.demon.co.uk.invalid
Wed Oct 1 06:39:35 UTC 2008

Richard B. Gilbert wrote:

> ISTR that "-g" unconditionally sets the clock to whatever time is 
> supplied by the source(s)!  It should bring your clock to within a few 
> milliseconds of whatever source(s) was/were used.  This is a ONCE only 
> setting.  Thereafter, less drastic methods are used and the size of any 
> correction is subject to "sanity checking".
Not what the documentation (4.2.4p4) says.  It only says that it removes 
the 1000 second limit.

>    -g
>           Normally,  ntpd  exits  with a message to the system log if the
>           offset exceeds the panic threshold, which is 1000 s by default.
>           This  option  allows  the  time  to be set to any value without
>           restriction;  however,  this  can  happen  only  once.  If  the
>           threshold is exceeded after that, ntpd will exit with a message
>           to  the  system log. This option can be used with the -q and -x
>           options. See the tinker command for other options.

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