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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Questions about a statistics.log field
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Tue, 8 Dec 2020 09:17:56 +0100
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On Mon, Dec 07, 2020 at 07:28:39PM +0000, Frank Wayne wrote:
> That does help, though field 4 becomes a little more mysterious. Is there anywhere these calculations are documented, other than the source code? I'm curious, if there are several variables involved, how their variances are combined to determine the final deviation.
Look for a textbook explaining weighted linear regression. The weights
are determined by the root distance of the NTP measurements, or more
precisely the increment in root distance over the minimum distance.
In any case, don't be afraid to look at the code. :)
--
Miroslav Lichvar
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