perfSONAR User Q&A and Other Discussion

[Peter van Heusden <>]

Thanks for the hint!

The default perfSonar setup uses a set of NTP servers on internet2.edu
that are not accessible from my perfSonar server(s). I replaced them
with accessible time servers and the output of ntpq -p is now:

     remote           refid      st t when poll reach   delay   offset 
jitter
==============================================================================
+zibbi.meraka.cs 238.72.153.243   2 u   48   64    7   72.510   -5.882  
8.591
-firewall.sanbi. 41.216.193.18    3 u   47   64    7    0.094   -2.696  
7.960
-ntp.mtnbusiness 41.73.40.11      3 u   47   64    7    5.543    4.661  
7.965
*chronos.es.net  .PPS.            1 u   46   64    7  232.200   -6.152  
8.662
+ntp2.is.co.za   146.64.58.41     2 u   44   64    7    5.475   -3.928  
6.901


The restarting is still continuing though. Can I expect this to
stabilise in the next while?

Peter

On 23/05/2013 20:27, Alan Whinery wrote:
> Peter -
>
> It might be useful to look at your NTP status. I note that you used the
> work "internal network". Does that mean either significant firewalling,
> or no routing to the outside?
>
> You need to have several NTP servers peered with your box, and bwctl
> will not start until it sees NTP as "synced".
>
> What are the servers defined, and what is the output of "ntpq -p" ?
>
>
>
> On 5/23/2013 7:31 AM, Brian Tierney wrote:
>> Hi Peter.
>>
>> That is normal until the clock gets synced, which can take several hours.
>> It should have stopped by now.
>>
>> It really should back off before it tries again, but that is not the case 
>> at the moment.
>>
>>
>> On May 23, 2013, at 7:05 AM, Peter van Heusden 
>> <>
>>  wrote:
>>
>>> Hi there
>>>
>>> I'm trying to use perfSonar for testing on our internal network.
>>> Unfortunately it is stuck in a loop where bwctl is being continuously
>>> restarted. This is perfSonar 3.3rc4 installed on CentOS 6.4. The message
>>> I am seeing in /var/log/messages is:
>>>
>>> May 23 16:02:26 ps bwmaster.pl[2849]: Restart
>>> bwctl->KNOPPIX->172_16_203_14:! at
>>> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/bwmaster.pl line 688.#012
>>> May 23 16:02:26 ps bwmaster.pl[2849]: Restart
>>> bwctl->KNOPPIX->PS_SANBI_AC_ZA:! at
>>> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/bwmaster.pl line 688.#012
>>> May 23 16:02:26 ps bwmaster.pl[2849]: Restart
>>> bwctl->PS_SANBI_AC_ZA->KNOPPIX:! at
>>> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/bwmaster.pl line 688.#012
>>> May 23 16:02:26 ps bwmaster.pl[2849]: Restart
>>> bwctl->172_16_203_14->KNOPPIX:! at
>>> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/bwmaster.pl line 688.#012
>>> May 23 16:02:26 ps bwmaster.pl[2849]: Restart
>>> bwctl->KNOPPIX->172_16_203_14:! at
>>> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/bwmaster.pl line 688.#012
>>>
>>> This perfSonar was installed from RPM.
>>>
>>> Does anyone know how to debug / solve this error?
>>>
>>> Thanks!
>>> Peter
>>>