[ntp:questions] ntpd: time reset problem

Unruh unruh-spam at physics.ubc.ca
Mon Sep 14 16:04:47 UTC 2009

Steve Kostecke <kostecke at ntp.org> writes:

>On 2009-09-14, Frank Elsner <Elsner at tubIT.TU-Berlin.DE> wrote:

>> The relevant lines read:
>> server times.tubit.tu-berlin.de       minpoll 6 maxpoll 8
>> server ntps1-0.cs.tu-berlin.de        minpoll 6 maxpoll 8
>> server ntps1-1.cs.tu-berlin.de        minpoll 6 maxpoll 8
>> server zeit.fu-berlin.de              minpoll 6 maxpoll 8
>> server ntp1.ptb.de                    minpoll 6 maxpoll 8
>> server ntp2.ptb.de                    minpoll 6 maxpoll 8
>> server ntp1.rz.uni-konstanz.de        minpoll 6 maxpoll 8
>> server rustime01.rus.uni-stuttgart.de minpoll 6 maxpoll 8

>Why are you changing the minpoll / maxpoll ?

>Please try again without the minpoll / maxpoll modifiers.

That has absolutely nothing to do with his problem. In fact having a smaller maxpoll saved
him sooner from whatever destroyed his time. Note that he is running a vm and the time on
a vm is terrible. To have this number of sources and then to run on a vm is a bit of
insanity but it won't hurt, just as his non-efault maxpoll also will not hurt him (it may
increase the load on the servers a bit)

>> # Undisciplined Local Clock. This is a fake driver intended for backup
>> # and when no outside source of synchronized time is available.
>> server     # local clock
>> fudge stratum 10

>The Undisciplined Local Clock is only needed if this ntpd must be able
>to serve time to others when no real time sources are available. It
>should not be considered a backup for a "leaf-node" system.

Agreed. That like is not needed.

>Do you have a driftfile line?

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