|Re: [chrony-users] Fallback clock on event "Can't synchronise: no reachable sources"|
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On Fri, 7 Feb 2014, Ulrich Schwesinger wrote:
I am a regular chrony user and I have a question related to the behavior of
chrony in the case of the event: "Can't synchronise: no reachable sources".
chrony rev.: 1.29
I have a system with a write protected system partition and an NTP server
running within a local network. Sporadically, chrony reports the above
The error persists maybe within a time range of 20-30 seconds. Within that
time interval, the system time seems to diverge/drift by a couple of 10
milliseconds, which seems unreasonable large for me.
That is far tooo large. chrony will just let the clock freewheel.
My questions are now:
(a) What is chrony exactly doing upon the event "Can't synchronise: no
reachable sources". It does not seem to keep the current system time. Is it
falling back on hardware clock maybe?
It should not.
(b) Or might something be wrong with the drift estimate, causing this large
divergence during the short time interval
(c) Are there some files I could look at the trace back what's happening
within these time intervals?
Thank you for your answers,
William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273
Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324
UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx
Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/
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