Riccardo Castellani wrote: > According to www.ntp.org in stanard Linux o.s. (adjtime(2) - > http://www.ntp.org/ntpfaq/NTP-s-algo.htm#S-ALGO-BASIC) time adjusting has > rate of 0.5ms per second to slew time but because do you speak about > "maximum" rate of 0.5 ms/sec. ? Does ntpd use always the same 0.5 as value > or it's a variable parameter ? > > I'm confused because "Rob MacGregor" said about step method (128ms < offset < > 1000s) : > Stepping: Time changes in large units, quickly > > With "Step" method (settimeofday), time is gradually changed with higher rate > or time is changes immediately to correct time. > example for use step method : my local clock is 5:00 pm and real time is 5:05 > pm, Ntpd set immediately local clock to 5:05 pm or it corrects time gradually > ?
If your local clock is 5:00 PM and real time is 5:05 PM, when you start ntpd with "-g", time will be set (stepped) immediately to 5:05 PM. In this case the magnitude of the error means nothing. The clock is set unconditionally. This is done once only! Thereafter, ntpd follows the rules we have been discussing; if the error is less than 128 milliseconds, the clock will be slewed (changed gradually) or, if the error is greater than 128 milliseconds, ntpd will step the clock. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
