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Re: [gpsd-dev] Draft Stratum 1 Microserver HOWTO is up
From: |
Eric S. Raymond |
Subject: |
Re: [gpsd-dev] Draft Stratum 1 Microserver HOWTO is up |
Date: |
Sat, 21 May 2016 13:38:09 -0400 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
Hal Murray <address@hidden>:
>
> address@hidden said:
> > I didn't have any particular accuracy goal in mind. It just seemed odd to
> > pick a threshold that would make pool sources unlikelly to vonistently meet
> > the RFC 5905 target.
>
> I think you are misreading the RF C. I can't find any place that uses the
> word "target".
>
> Here is the only section that uses "few tens of milliseconds"
> With NTPv4, servers and clients are precise within a
> few tens of milliseconds with poll intervals up to 36 hours.
>
> The previous sentence says "fast LANs". There is nothing in that area that
> discusses WANs and all the ways they can screwup. There is probably an
> unstated assumption of well-cared-for systems. The goal of the pool is to
> get something working well enough without the human effort required for that
> care.
Thanks for the correction.
Hm. I guess I must lower my expectations.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
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