[ntp:questions] NIST vs. pool.ntp.org ?

Charles Elliott elliott.ch at verizon.net
Fri Mar 29 10:13:51 UTC 2013

In the US, the stratum 2 time servers are much less used than the stratum 1
servers, and they dispense fairly accurate time.  The stratum 1 time servers
frequently have erratic and lengthy processing delays.  You can find time
servers here http://support.ntp.org/bin/view/Servers/WebHome
and finding ones near you is well worth the effort.  Nothing will help
though if your neighbor decides to download a movie or two.

Charles Elliott

> -----Original Message-----
> From: questions-bounces+elliott.ch=verizon.net at lists.ntp.org
> [mailto:questions-bounces+elliott.ch=verizon.net at lists.ntp.org] On
> Behalf Of Magnus Danielson
> Sent: Thursday, March 28, 2013 8:32 AM
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] NIST vs. pool.ntp.org ?
> Hi again Robert,
> On 03/28/2013 04:22 AM, Robert Scott wrote:
> > On Thu, 28 Mar 2013 02:50:17 GMT, unruh<unruh at invalid.ca>  wrote:
> > You really should read my posts before responding.  No, I do not
> > intend to hard-code NIST or any other server.  I never said I wanted
> > to.  No, the app is not intended for all musicians.  It is intended
> > for professional piano tuners only.  I sell about one per day.  And I
> > never said the pool would not be good enough for my needs.  I only
> > asked about the relative benefits of the pool vs. NIST, which "E-mail
> > sent...Blacklists" answered very nicely.
> There is no real benefit in using either, rather you should use the mix
> of servers which gives you good confidence in removing false-tickers as
> well as good precision due to use of short distances.
> Look at the NTP code and book, as many of the filtering steps aims at
> removing noise which polute the time and frequency errors. Do the to-
> way
> time-transfer.
> Cheers,
> Magnus
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