perfSONAR User Q&A and Other Discussion

[Peter van Heusden <>]

logfile /var/log/ntpd
driftfile /var/lib/ntp/ntp.drift
statsdir  /var/lib/ntp/
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable

# You should have at least 4 NTP servers

server ntp1.meraka.csir.co.za iburst
server ntp.sanbi.ac.za iburst
server ntp0.za.uu.net iburst
server chronos.es.net iburst
server ntp2.is.co.za iburst

thanks!

On 23/05/2013 21:17, Pedro Queirós wrote:

Peter, from the ntpq -p output I can see your NTP config is faulty.

Can you provide the /etc/ntp.conf file?

Kind Regards,

Pedro

On Thu, May 23, 2013 at 8:04 PM, Jason Zurawski <> wrote:

While not true in this case that you sent - static lists fall into disrepair frequently.  A couple of months back we tried this in the APAN region and found about 1/5 still worked well after being posted to an 'official' wiki.

It doesn't hurt to ask those on the front lines that are adopting pS for some insider info - that request applies to all, even if they ate not in South Africa.

Thanks;

-jason

On May 23, 2013, at 11:58 AM, Michael Sinatra <> wrote:

> On 05/23/2013 11:44, Jason Zurawski wrote:
>> Hey Peter;
>>
>> I would nuke the ESnet server too - NTP works best when the servers are within the same timezone/continent, it gives the algorithms a level playing field to choose from.
>
> It's not really the case that a server outside of the timezone or continent matters.  The key is whether it's more likely than not that there will be asymmetry in the path to/from a given NTP server.  I don't really see much evidence of that with any of the servers in the list, except for possibly ntp.mtnbusiness....
>
>
>> A related note is that we are always looking to add new servers into our list around the world - if you know of 'open' clocks in the region that we can front-load into the list, that can be arranged.
>
> Well, there's a published list of them here:
>
> http://support.ntp.org/bin/view/Servers/WebHome
>
> :)
>
> michael
>