Re: [chrony-dev] Frequency transfer in NTP

[Vincent Blut <vincent.debian@xxxxxxx>]

Le 2021-11-16 12:04, Miroslav Lichvar a écrit :
> On Thu, Jan 28, 2021 at 03:40:52PM +0100, Miroslav Lichvar wrote:
> > I guess most people here don't follow the NTP WG list. There is one
> > feature proposed for NTPv5 that I think would make a big difference
> > for chrony:
> > 
> > https://fedorapeople.org/~mlichvar/ntp-freq-transfer/
> 
> This is now implemented as an experimental feature in the chrony
> development branch. It can be enabled by adding "extfield F323" to the
> server/peer/pool directive. Beside the new monotonic receive
> timestamp, the extension field also contains a higher-resolution
> version of the root delay and root dispersion, so clients in local
> network can better estimate their maximum error.
> 
> In my tests the frequency transfer works well, in both basic and
> interleaved modes. It significantly improves stability of the
> synchronization. I wish I looked into it sooner.
> 
> I hope it will be included in NTPv5 in some form, but that may take
> years. The working group still has not reached a consensus on the
> requirements for the new protocol. So, at least for now, we have this
> experimental extension field in chrony.

Superb. Thanks a lot for your work, Miroslav!

> -- 
> Miroslav Lichvar

Cheers,
Vincent

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