[ntp:questions] Accuracy of NTP

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Wed Apr 4 18:41:13 UTC 2007

>I'd like to know something like this: If we assume the servers are
>reasonably accurate, and state the statistics of the network jitter and the
>behaviour of the client oscillator, and control the clock using NTP over the
>network, what frequency variation can we expect?

It's probably more complicated than that.  I suggest running
the experiment.

What sort of accuracy are you looking for?
  Milliseconds?  Microseconds?

How stable is the temperature at the client?

ntp assumes that the network delay is symmetric.  That
works badly if you have something like a DSL link that is
mostly idle but occasionally busy in one direction for long
periods of time while you download a CD.  There are several
parameters that usually help.

These are my opinions, not necessarily my employer's.  I hate spam.

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