On Sunday, February 10, 2019 at 10:44:48 AM UTC-8, V. Kelly Bellis wrote:
>
> http://weewx.com/docs/usersguide.htm states that I should run a NTP 
> <http://www.ntp.org/> daemon, but doesn't address an existing/ running 
> pre-installed timesync service; e.g., installed with Raspbian via NOOBS
>
> Elsewhere <http://raspberrypi.tomasgreno.cz/ntp-client-and-server.html>, 
> we read that timesync and NTP should not be run at the same time - "*but 
> you can not have running both of them at the same time*"
>
> Is the pre-installed timesync sufficient for weewx? Either way, could the 
> users guide include some mention of timesync's shortcomings or sufficiency 
> insofar as weewx is concerned?
>
>
>
The users guide can't/shouldn't try to cover all the nuances of every 
operating system nor the sheer unfettered joy that is systemd (ha - beat 
Matthew to it!)

What happens is if you run NTP, systemd gets out of the way and doesn't 
enable its ntp hack/feature/whatever.

So, FWIW, I always run NTP because I have decades of positive experience 
with that software.   It's a well-understood thing.   Much easier to debug 
when that's needed.

(and any time I can disable systemd 'helping' me, I tend to do so.  That 
thing is much harder to debug when it goes whacko.)
 

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