[CentOS] Date drift and ntpd

[Les Mikesell]

Warren Young wrote:
> 
> The strategy I recommended is based on the fact that its worst case 
> behavior (a small negative jump every hour) is not a problem for me.  If 
> it is a problem for your application, you need a different design.

It's a bad idea in the general case.  If you have scheduled jobs, ntpdate may 
jump the clock enough to miss the trigger or run them twice, where ntpd always 
tries to move the clock fractional seconds at a time so as not to let that 
happen.   Plus, ntpdate does no sanity check at all - if the clock source is 
badly off, the client will follow blindly even if it goes to the wrong century.

-- 
   Les Mikesell
    lesmikesell at gmail.com