perfSONAR User Q&A and Other Discussion

[Andrew Lake <>]

Hi Jeremy,

If you are using the meshconfig, I am not sure there is a way. If you edit your /etc/maddash/maddash-server/maddash.yaml file by hand though, do a text search for "check_owdelay.pl". You should see a command similar to the following:

/opt/perfsonar_ps/nagios/bin/check_owdelay.pl -u %maUrl -w 0.001 -c 0.1 -r 2700 -l -p -s %row -d %col

The -w and -c are the warning and critical thresholds respectively. To make negative values OK add \~: to the warning range. Example below:

/opt/perfsonar_ps/nagios/bin/check_owdelay.pl -u %maUrl -w \~:0.001 -c 0.1 -r 2700 -l -p -s %row -d %col

The \ is to escape the ~ so it isn't expanded to a home directory. The ~ is a special character meaning negative infinity. See the nagios threshold format documentation for more details: https://nagios-plugins.org/doc/guidelines.html#THRESHOLDFORMAT

Thanks,

Andy

On Sep 29, 2014, at 12:31 PM, Jeremy Palmer <> wrote:

Is it possible to make PerfSonar Dashboard ignore negative latency numbers so they don't show up as CRITICAL/RED squares on the PerfSONAR Dashboard?
Our OWAMP dashboard is configured to return Critical status if latency is > 60ms. However, some of our sites are very close to eachother (less then 0.5ms one-way) and due to NTP clock skew, they sometimes return negative results (example: -0.016ms). Unfortunately these negative numbers cause the dashboard to alarm Critical/red for that check. This confuses our TAC guys and can also mask real latency issues.
Any way to make the dashboard ignore negative latency numbers so they don't return CRITICAL status?

-- 
Jeremy Palmer
Senior Network Engineer
ViaWest, Inc.
Office: 720.891.1045
Fax: 303-874-5236
http://www.viawest.com