What is a good book on ntp that explains the math behind the protocal.
Thanks
Chip
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chipper wrote:
What is a good book on ntp that explains the math behind the protocal.
As far as I know, there is only one book on NTP. I believe it has a
mathematical analysis, but it is almost certainly written for someone
with a background in control theory and phase locked loops.
If you
Eugen COCA wrote:
Due to a network problem on our provider, the packets were routed on a
Duplicate thread.
different path than usual yesterday, for several hours. This period,
NTP displayed wrong offsets:
+GPS_NMEA(1) .GPS.0 l 16 16 3770.000
0.001 0.002
ptbtime1.p
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Unless I'm off by a magnitude somewhere;
Copper wire is about 0.3m/ns? 100m ~= 333+ns?
The differences in e.g. PC serial port implementations
between different PPS recipi
What is a good book on ntp that explains the math behind the protocal.
Thanks
Chip
See Dave Mills' book:
ISBN 0849358051
http://books.slashdot.org/story/06/05/15/143251/Computer-Network-Time-Synchronization
Cheers,
David
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Over in comp.arch, this was mentioned as how one might get time to the
far reaches of a chip with equal delay. I recall that someone not too
long ago wanted to distribute a PPS signal to a bunch of systems, and
thought this might be helpful.
rick jones
[ This is a repost of the following article
Tobias wrote:
http://superuser.com/questions/304085/ntpdsim-simulator-for-ntp
You could have copied the contents onto the newsgroup (also your post
has been delayed through not posting it direct to usenet).
I've never used the simulator, but for a real ntpd, localhost can never
be a vali
In article <51c20190-11b8-4629-a762-cbf95369e...@r18g2000vbs.googlegroups.com>,
Eugen COCA writes:
>Due to a network problem on our provider, the packets were routed on a
>different path than usual yesterday, for several hours. This period,
>NTP displayed wrong offsets:
ntpd assumes the network
Due to a network problem on our provider, the packets were routed on a
different path than usual yesterday, for several hours. This period,
NTP displayed wrong offsets:
+GPS_NMEA(1) .GPS.0 l 16 16 3770.000
0.001 0.002
ptbtime1.ptb.de .PTB.1 u4 64 377
Rick Jones wrote:
> Over in comp.arch, this was mentioned as how one might get
> time to the far reaches of a chip with equal delay.
> I recall that someone not too long ago wanted to
> distribute a PPS signal to a bunch of systems,
> and thought this might be helpful.
>
> John Savard wrote:
Steve,
The combine algorithm operates on the survivors of the cluster
algorithm, as described on the "How NTP Works" page. The number of
survivors can be set using the minclock option. I'm not sure why you
want to do this, but the option is there.
Dave
Steve Kostecke wrote:
Is it possible
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