Hi:
I am running ntp on a fedora 12 machine. The time sync error/offset
values reported by ntpserver and "ntpq -p" are quite different. I have
always tended to rely on "ntpq -p". Is there an explanation for this
difference? My Fedora 12 machine has been up overnight.
Thanks for any comments.
# n
I have a stable drift value on my fedora 12 node and everything is
running well. (offsets are well below 1msec). If I now stop 'ntpd'
will my time start to drift relative to the 'correct time' by the PPM
value in the drift file? Or is it that ntpd has already set things up
so that corrections as pe
On Feb 27, 3:41 am, "David J Taylor" wrote:
> It shows just how much better the 4.2.4 version was than the current
> version. I do hope that this will encourage someone to look again at the
> code with a view to discovering the differences and making the current
> version work as well as the pre
On Feb 26, 5:44 am, Dave Hart wrote:
> http://davehart.net/moo/ntpd-QPC-20090614-0900.zip
>
> That represents the last in a series of 4.2.4p6-based private releases
> of mine.
OK, so started to use this 4.2.4p6 version and immediately saw a
reduction in variations in the "offset" value.
see
>There was some discussion about this here:
>
> http://www.satsignal.eu/ntp/V4.2.4.vs.V4.2.5.html
>
Hello David:
THere is good info at the link above but it appears no conclusion was
drawn about this issue you raised.
I guess I will have to carefully test w/ 4.2.4 and 4.2.6 (or 4.2.5
also?) and
Also, it seems that running w/ minpoll=maxpoll=32 is important for
win7.
For a variety of technical reasons our machines get rebuilt over and
over. Clearly we will need a way for each time it is rebuild to
restore its drift file. This is a standard technique used by folks in
similar use case as ou
one more graph, the drift file. link is below. Interestingly, the
drift file values on win7 do not get written out for a long time,
after the win7 somewhat starts to stablilize.
http://www.atl.external.lmco.com/projects/QoS/documents/feb24_drift.png
Gautam
_
Here are some updates based on overnight running of "ntpq -p" every 10
seconds.
win7 is running w/ minpoll=maxpoll=32, Linux is running as just
standard NTP install (fedora 12).
win7 NTP is version 4.2.7p98 overlayed on top of Meinberg install.
Linux NTP is version 4.2.4
Offset, delay and jitter
If the following provides some clue to any one.
As for the question if the server is jumping or the client is jumping,
i also have a fedora12 linux machine on the same subnet getting NTP
time for the same server as this windows 7 machine. The fedora machine
sync's to submsec and stays there with s
David:
In looking at the data on all your machines I note a few things:
http://www.satsignal.eu/mrtg/performance_ntp.php
1) hydra is a windows7 machine, and running NTP 4.2.7, but Molde is
also a Win7 machine and seems to be doing just fine running NTP 4.2.4
version.
2) Gemini, hydra and molde,
Here is what the Windows7's event log says. The last restart w/
4.2.7.p98 was started at 3:51. (It is not giving a good sync). Earlier
than that I had an error in specifying minpoll=maxpoll=32, but i fixed
that and i do see "poll" value of 32.
Level Date and Time Source Event IDTask
On Feb 24, 4:03 pm, Chris Albertson wrote:
> On Thu, Feb 24, 2011 at 12:14 PM, David J Taylor
>
> wrote:
> > Are you sure that, on your system, there are no other programs trying to set
> > the time?
>
> That is what I thought, that something was "jumping" the system clock.
> The fact that the o
On Feb 24, 3:14 pm, "David J Taylor" wrote:
> In: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
> NT\CurrentVersion\Multimedia\SystemProfile\
> I set: NetworkThrottlingIndex to -1 () (stops throttle)
> and SystemResponsiveness to 80 (=80% to non-multmedia)
>
> these may make a difference
http://www.atl.external.lmco.com/projects/QoS/documents/win7_feb23.png
I decided to start a new thread since the prev. one got a bit long and
also has on going discussions about GPS PPS hardware.
Based on > 1 response I upgraded to
ntp-4.2.7p98-win-x86-bin.zip
from
http://davehart.net/ntp/win/
Update:
ntp-4.2.7p98-win-x86-bin.zip
is running for me on my Win7 box. I will see how well it syncs time
and report.
My problem appear to be at least in part that
ntp-4.2.7p67-win32.zip
binaries did not work when I used them to over write what Meinberg
installer puts down (4.2.4 based.) But I
sorry about the double post - not sure how that happened.
Anyway, i have uninstalled and reinstalled meinberg. Meinberg is
running now, according to window services status, but I am unable to
see how well it is doing as running the meinberg
NTP_time_server_monitor appears to start up but immediatel
Once you replace the binaries in
C:\Program Files\NTP\bin
do you need to do anything extra (such as use Instsrv.exe) to register
the new binary. I get a popup saying
"Erorr 5: access is denied".
Any hints welcome.
Gautam
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Once you replace the binaries in
C:\Program Files\NTP\bin
do you need to do anything extra (such as use Instsrv.exe) to register
the new binary. I get a popup saying
"Erorr 5: access is denied".
Any hints welcome.
Gautam
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Hi:
I have had excellent results using
http://www.meinberg.de/download/ntp/windows/ntp-4.2@lennon-o-lpv-win32-setup.exe
on a windows XP platform, but on windows 7 I never get a good sync.
(The NTP server is a high quality statum 2 time server which provides
excellent time to Fedora/Linux cli
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