lubuntu-desktop team mailing list archive

["Lee Gold" <leegold@xxxxxxxxxxxxx>]

Thanks, I stand by by my "crazy" qualifier. I used etherape to look at
the activity. I've done that a lot for years and have never seen
anything like he ntp activiy I saw. I have uninstalled ntp and now do $
sudo ntpdate 0.us.pool.ntp.org once in a while. 
  

On Mon, 18 Jul 2011 23:20 -0700, "Jonathan Marsden"
<jmarsden@xxxxxxxxxxx> wrote:
> On 07/18/2011 08:05 AM, Lee Gold wrote:
> 
> > Using Lubuntu 11.04. I want to limit ntp activity. I see continuous ntp
> > activity like Ive never seen before.
> 
> 
> (1) Compared to Ubuntu 11.04 ?  Or to what?
> 
> (2) How are you "seeing" it -- wireshark or tcpdump packet captures?
> 
> (3) Are you using the same ntp.conf file on the two machines you are
> comparing?
> 
> (4) Is there anything else different about the two machines that could
> be relevant?
> 
> (5) Is either of them a virtual machine running "on top of" some other
> OS?
> 
> > Of course I want it checked but I want to control what sites and only
> > at boot time and at reasonable intervals.
> 
> 
> The first is controlled in ntp.conf, the second (intervals) grow as the
> clock stabilizes, and has done so for some years.
> 
> > The ntp activity is unlike anything I've ever seen and I've
> 
> > looked at it in previous editions and I'd classify it as crazy now.
> 
> 
> If you can see very different behaviour in 11.04 from other machines
> with the *exact* same ntp.conf file, then I'd suggest opening a bug in
> Launchpad, and providing sufficient detailed information that others can
> duplicate this behaviour.  That would include:
> 
> (A) the specific version of ntp you are running,
> 
> (B) your ntp.conf file,
> 
> (C) sample output of
> 
>   /usr/sbin/ntpq -p
> 
> after the machine has been running ntpd for a few hours,
> 
> (D) /var/log/syslog (or equivalent) lines containing the string ntpd,
> 
> and probably also
> 
> (E) a wireshark or tcpdump packet capture file of all the "crazy" NTP
> traffic you are seeing.
> 
> Without this kind of specific and clear information, no-one but you can
> possibly know how "crazy" the behaviour you are seeing is, and no-one
> can even attempt to duplicate it, to help you further!
> 
> As far as I can see from systems around here, the initial ntpd peer poll
> frequency is still 64 seconds, as it has been for years now, and the
> backoff down to 1024 second polling seems to me, very unscientifically I
> realize (!), to be about the same as it always has been.
> 
> > I tried going into ntp.conf and commented out these two lines- it
> > seemed like it would help from the description above them
> 
> 
> I'd suggest reading the relevant man page, by doing
> 
>   man ntp.conf
> 
> and fully understanding the ntp.conf file, before suggesting that ntpd
> behaviour is "crazy".  My understanding is that restrict determines
> which machines *can* interact with your NTP server and *how* they can
> interact with it.  It does not change the frequency your server polls
> its peers, as far as I know. I don't think it ever has.
> 
> Hoping this helps,
> 
> Jonathan
> 
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