Re: Acqusition of time

["Charles W. Swiger" <chuck () codefab com>]

On Wednesday, January 29, 2003, at 06:02  PM, Luis Bruno wrote:
> > running ntpdate or some such upon system boot is a pretty good idea.
>
> Just at boot? I'd sync the machine clock to the NTP clock periodically,
> to avoid "jumps" in time; any reason NOT to do this?

Yes and no.  If you want to smoothly adjust the system clock without 
"jumps", you're better off running ntpd continuously than running ntpdate 
via cron on some scheduled basis.  ntpd will compute the system clocks' 
intrinsic drift from reference time sources, and tell the kernel to skew 
the time via adjtime() rather than "jump" via settimeofday().

[ Running ntpdate at boot is the best way of correcting any major errors 
with the system time.  Running ntpd from there on is the best way of 
keeping the system time syncronized. ]

-Chuck

       Chuck Swiger | chuck () codefab com | All your packets are belong to 
us.
       
-------------+-------------------+-----------------------------------
       "The human race's favorite method for being in control of the facts
        is to ignore them."  -Celia Green

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