Hi,
the PPS signal comes from one GPS clock.
At the cold start the drift could be several seconds, so we plan to perform a
ntpdate before launching the ntp client.
The sync accuracy we want to achieve for this particular system is below 3ms
offset.
After the ntpdate we assume that the offset
jthul...@gmail.com writes:
Hi,
the PPS signal comes from one GPS clock.
At the cold start the drift could be several seconds, so we plan to
perform a ntpdate before launching the ntp client.
That sounds like the offset is possibly several seconds. I was asking
about drift (frequency
Paul tik-...@bodosom.net wrote:
On Sun, Jun 15, 2014 at 12:11 PM, Rob nom...@example.com wrote:
Did you put prefer on the PPS and not on another source?
That was the complete output of ntpq. The local clock is marked prefer; it
can reliably number the seconds. This is just a demonstration
jthul...@gmail.com jthul...@gmail.com wrote:
Hello,
I'm looking for a way to speed up the ntp convergence of a system which would
be restarted after several days being off. Does the use of PPS improve this
convergence time ?
This is local configuration, with one LAN and one NTP server, with
jthul...@gmail.com jthul...@gmail.com wrote:
Hi,
the PPS signal comes from one GPS clock.
At the cold start the drift could be several seconds, so we plan to perform a
ntpdate before launching the ntp client.
The sync accuracy we want to achieve for this particular system is below 3ms
On 16/06/2014 09:29, jthul...@gmail.com wrote:
I've never used ntpdate, just the appropriate option to ntpd at startup.
Is it ignore_bigtimestep yes ?
Does it enable the realignment of a client with several seconds offset ?
It's the -g parameter, I believe:
I've never used ntpdate, just the appropriate option to ntpd at startup.
Is it ignore_bigtimestep yes ?
Does it enable the realignment of a client with several seconds offset ?
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David Woolley wrote:
On 15/06/14 15:16, Jason Rabel wrote:
On a related note, is there any way to determine if the requests are
made by ntpdate vs ntpd? I realize ntpdate is depreciated but
ntpdate cannot send a valid stratum or reference time. Strictly
speaking it should obey the SNTP rules
PPS makes the final convergence a lot faster, because it is usually being
run at a high sample rate (once every 16 seconds).
Watch your 'minpoll' and 'maxpoll' values.
Does it mean that if I set the minpoll and maxpoll values to 4, I will have a
convergence time result almost as good as
On 16/06/14 07:08, jthul...@gmail.com wrote:
Hi,
the PPS signal comes from one GPS clock.
At the cold start the drift could be several seconds, so we plan to perform a
ntpdate before launching the ntp client.
The sync accuracy we want to achieve for this particular system is below 3ms
The objective here of a 3ms offset is pretty conservative so I am inclined to
prefer connecting the PPS clock to the NTP server if that is running all the
time, and the clinet(s) are not behind old tech routers/switches. There does
not appear to me to be much benefit from having the PPS
On 2014-06-16, jthul...@gmail.com jthul...@gmail.com wrote:
Hello,
I'm looking for a way to speed up the ntp convergence of a system which would
be restarted after several days being off. Does the use of PPS improve this
convergence time ?
This is local configuration, with one LAN and one
On -10.01.-28163 20:59, Jason Rabel wrote:
Yes, every now and then I too, like the OP, will see huge spikes
in my packets received/sent that occur at or very close to an
on-hour mark at particular times (like midnight or 4 am), my guess
is a poor implementation in a router somewhere. I've
On -10.01.-28163 20:59, jthul...@gmail.com wrote:
I'm looking for a way to speed up the ntp convergence of a system
which would be restarted after several days being off.
Since you seem concerned about additional frequency offset while the
system warms up: Can you turn it on (and, say, let it
jthul...@gmail.com jthul...@gmail.com wrote:
PPS makes the final convergence a lot faster, because it is usually being
run at a high sample rate (once every 16 seconds).
Watch your 'minpoll' and 'maxpoll' values.
Does it mean that if I set the minpoll and maxpoll values to 4, I will have
Jochen Bern jochen.b...@linworks.de wrote:
On -10.01.-28163 20:59, jthul...@gmail.com wrote:
I'm looking for a way to speed up the ntp convergence of a system
which would be restarted after several days being off.
Since you seem concerned about additional frequency offset while the
system
Hi,
sorry for stepping in so late, I've been on holidays with limited
internet access.
hschu...@gmail.com wrote:
Hi!
Some days ago I tried Meinberg NTP on my Server2008R2.
After some security issues (administrator rights required, compatibility) NTP
worked as service..
But after a while I
On Mon, Jun 16, 2014 at 3:26 AM, Rob nom...@example.com wrote:
Note that we do not have a local clock, only PPS.
I'm starting to wonder if you simply refuse to read the documentation or
you're just trolling to cause trouble.
I want to use that majority vote, not one particular server.
Is
Hi,
sorry for stepping in so late, but I've been on vacation with limited
internet access.
garrettbrian1...@gmail.com schrieb:
I have been trying to install the Meinberg NTP build for Windows and
the install is going through, yet NTP won't start because the client
is saying the password is
Martin Burnicki martin.burni...@meinberg.de wrote:
Hi,
sorry for stepping in so late, but I've been on vacation with limited
internet access.
garrettbrian1...@gmail.com schrieb:
I have been trying to install the Meinberg NTP build for Windows and
the install is going through, yet NTP
Paul tik-...@bodosom.net wrote:
On Mon, Jun 16, 2014 at 3:26 AM, Rob nom...@example.com wrote:
Note that we do not have a local clock, only PPS.
I'm starting to wonder if you simply refuse to read the documentation or
you're just trolling to cause trouble.
To avoid further confusion, I
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