On 2/14/2012 1:43 AM, David J Taylor wrote:
"A C" <[email protected]> wrote in message
news:[email protected]...
[]
I'm not sure it's a good idea either but I would really like to
understand why a refclock clamps the polling interval at such a low
value when nearly every bit of documentation says we should be kind to
NTP servers and make sure the polling period is allowed to reach 1024.
If you look back in the archives of this newsgroup you will find that I
asked David Mills a similar question, and he gave an answer. I'm not
sure that I completely understood the answer, though.
I now have lines like the following in my ntp.conf file for my stratum-1
PCs:
server 0.uk.pool.ntp.org minpoll 10
server 1.uk.pool.ntp.org minpoll 10
server 0.nl.pool.ntp.org minpoll 10
As I have three PCs peered fed from different GPS receivers I'm hoping
that the Internet servers are never needed. <G>
Cheers,
David
The problem with THREE GPS receivers, or just about any other clock, is
that it it can too easily degenerate to the two server case. It is well
known that "a man with two clocks can never be certain what time it is."
Four, five, and seven are the magic numbers for a robust configuration.
Most sites will settle for four. The very paranoid or the very rich
might go for seven.
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