[ntp:questions] stepping and slewing
Riccardo Castellani
castellani.riccardo at tiscali.it
Thu May 3 23:14:52 UTC 2007
Look at carefully Steve Kostecke's message where he said:
--------------------------------
step == reset the clock to the correct time in _one_ instantaneous step.
A stepped clock can "move backwards".
slew == adjust the clock by speeding it up or slowing it down. A slewed
clock never "moves backwards"
--------------------------------
you can see slewed clock never moves backward, it can decelerate or
accelerate clock by 0.5 ms/sec, but not set time backward of several minutes
!
----- Original Message -----
From: Hal Murray
Newsgroups: comp.protocols.time.ntp
To: questions at lists.ntp.isc.org
Sent: Thursday, May 03, 2007 10:26 AM
Subject: Re: [ntp:questions] stepping and slewing
>Now I understand that stepping set clock immediately to correct time
>(both forward and backward) while slewing permit to adjust gradually
>time at max 0.5 ms /sec rate (ONLY forward). is'tt OK ?
Slewing can go in either direction.
To advance, the clock advances by 1.0005 seconds per real second.
To backup, it advances by 0.9995 seconds per second.
--
These are my opinions, not necessarily my employer's. I hate spam.
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