[ntp:questions] NTP absolute accuracy?

David Malone dwmalone at maths.tcd.ie
Sat Oct 31 09:11:23 UTC 2009


"David J Taylor" <david-taylor at blueyonder.not-this-bit.nor-this.co.uk.invalid> writes:

>"Unruh" <> wrote in message news:34JGm.50898$PH1.36449 at edtnps82...
>[]
>> Note that chrony will give you a factor of 2 or three improvement over
>> ntp  in the errors, assuming that the roundtrip is equally split on
>> Linux or BSD.

>For those without wide-bandwidth academic connections - those folks on 
>cable or ADSL - how good is an "equal split round trip" assumption?

I have a machine with Rugby reciever that also syncs (over DSL) to
a machine with a GPS unit. Based on that, it looks like the asymetry
is small (not more than a handful of ms, on a path of 32ms).

	David.




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