unruh wrote:
On 2011-04-19, David Lord <[email protected]> wrote:
David J Taylor wrote:
"unruh" <[email protected]> wrote in message
news:[email protected]...
[]
Well, I think someone other than the current maintainers will have to
port it to windows. Since windows timekeeping is not the worlds best
anyway, it is probably true that the extra accuracy of chrony is
unnecessary. It does have a command line option "like ntpq -p"
provided by chronyc (depending on what you mean by "like").
What MRTG is I do not know.
If you are happy with ntpd, by allmeans stay with it.
A pity that chrony will not be offered for Windows, at least for tests
to see whether it lives up to its claims. There are times when a more
rapid convergence would be welcome, such as the reboot of PC Molde
around 13:30 yesterday:
http://www.satsignal.eu/mrtg/molde_ntp-b.html
MRTG is a standard logging tool for network I/O which uses SNMP to
produce the graphs I have quoted here many times for network throughput
and timekeeping:
http://www.satsignal.eu/mrtg/performance_network.php
http://www.satsignal.eu/mrtg/performance_ntp.php
I've written how to extend MRTG to monitor NTP timekeeping, and various
other parameters such as disk space and temperature here:
http://www.satsignal.eu/ntp/NTPandMRTG.html
http://www.satsignal.eu/mrtg/performance_howto.php
From chronyc I would need to be able to use a simple Perl script to
extract the numbers to be plotted - such as the Offset in the graphs
above. An easy job if the format is standardised and machine readable.
I based my script on yours for ntp but changed from using a
linear axis to log. I first used chrony on NetBSD when on
dialup with demon and later for a while when on broadband.
When I first compared chrony with ntpd there was no contest
but more recent experiments with chrony had periods of
severe instability much worse than ntpd.
More recent means what? What version of chrony? (there was a bug found
in the past two weeks that was introduces a few months ago which did
result in instability)
More recent than November 2009.
Probably between Dec 2009 and Jan 2010 and p4x2400c.
chrony 1.23
P4X2666 with chrony
<http://www.lordynet.org.uk/mrtg/stats/>
Not at all sure what I am supposed to see. I have no idea what the graph
axes represent? What is 1.1k
X-axis is in hours
Y-axis is offset in us so 1.1k = 1100us
Next experiment is to couple up the GPS again but if you
click on the ME6000 in the current stats the yearly graph
for Sep/Oct/Nov was when I last had the gps connected.
David
Note that you can see my offsets with chrony on my web page. The network
problems really do cause difficulty, but the offsets in general are very
small -- 10usec over the network.
Current stats all with ntpd.
<http://www.lordynet.org.uk/mrtg/stats/ntp/>
David
_______________________________________________
questions mailing list
[email protected]
http://lists.ntp.org/listinfo/questions
