| Re: [chrony-users] How to use Facebook's NTP-service correctly? |
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Hi Lars-Daniel,
an important point for you since you're presumably in Germany and
I already went through the futile attempts to use these servers:
they're all outside Germany, with rather high latency and quite
terrible connectivity, depending on your ISP's routing and current
backbone load. Inetrestingly enough FB has some timeX.facebook.*de*
servers with rather decent (meaning: stable) latency, but those boxes
do not return any answers. So apart from the smearing issue, purely
by accuracy FB's time services are quite useless if you're in
Germany.
You're much better off using the public .de NTP pool or addressing
1..3 public servers explicitly. I've set my router to pull from three
stable Stratum 1 sources and get excellent, always-available results
on all my inhouse clients, e.g. this on my workstation:
$chronycmd sources
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* bifrost.applied-asynchro> 2 6 377 25 -3937ns[-7799ns] +/- 5388us
$chronycmd sourcestats
Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
==============================================================================
bifrost.applied-asynchro> 8 6 229 -0.002 0.164 -46ns 7193ns
hth,
Holger
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