[ntp:questions] Re: ntp client over satellite and no CMOS battery
David L. Mills
mills at udel.edu
Fri Oct 7 05:03:09 UTC 2005
Thrupence, I hadn't heard that for 33 years when I was a young lecturer
at the University of Edinburgh. That was a really enjoyable experience
for a young postdoc. Now everything is decimal.
Danny Mayer wrote:
> David L. Mills wrote:
>> A good deal of quality design time went into the statistical analysis
>> of errors and the manner in which statistics are presented to the
>> application, in this case via ntp_gettime(). You don't want to know
>> anything other than the carefully maintained maximum error and
>> estimated error statistics. Neither the stratum of the server nor the
>> poll interval nor the precision nor any other statistic is necessary
>> to evaluate the quality of time. The maximum error and estimated
>> error already take those factors into account. You really don't want
>> to second guess what the server is doing, just that it and the local
>> client are providing dependable statistics.
>> As I said in my last, your clock is Big Ben and NTP is manipulating
>> the number of farthings, h'apennies, pence, shillings, pounds and
>> guineas on the pendulum. [Gawd, after 33 years since decimalization,
>> I'm not sure I remember how to spell all that coinage.]
> You did forget the threepence, half-crowns, crowns, and florins, all
> of which I have in my collection.
> I seems to remember reading somewhere that Big Ben actually uses NTP
> to stay accurate.
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