SEECS vs SLAC
The pingtable.pl results measured from SLAC and from SEECS differs in some cases. For example compare:
- http://pinger.seecs.edu.pk/cgi-bin/pingtable.pl?file=average_rtt&by=by-node&size=100&tick=monthly&from=PK.AUP.EDU.N2&to=PK.UPESH.EDU.N2&ex=none&dataset=hep&percentage=any with
- http://www-wanmon.slac.stanford.edu/cgi-wrap/pingtable.pl?file=average_rtt&by=by-node&size=100&tick=monthly&from=PK.AUP.EDU.N2&to=PK.UPESH.EDU.N2&ex=none&only=all&dataset=hep&percentage=any.
For October 2010 SEECS reports 0.777 while SLAC reports 0.985. Looking at the October daily results:
- http://pinger.seecs.edu.pk/cgi-bin/pingtable.pl?file=average_rtt&by=by-node&size=100&tick=daily&year=2010&month=10&from=PK.AUP.EDU.N2&to=PK.UPESH.EDU.N2&ex=none&dataset=hep&percentage=any
- http://www-wanmon.slac.stanford.edu/cgi-wrap/pingtable.pl?file=average_rtt&by=by-node&size=100&tick=daily&year=2010&month=10&from=PK.AUP.EDU.N2&to=PK.UPESH.EDU.N2&ex=none&only=all&dataset=hep&percentage=any
It is seen that SLAC is missing data from October 2nd 2010. Otherwise the values are identical. Since SLAC and SEECS gather the data from the monitoring sites independently. There will occasionally be differences since the remote node may be inaccessible when one of the monitoring hosts is gathering the data. If one is pedantic one can use getdata.pl to re-gather the missing data. For example in this particular case to re-gather the missing data from SLAC one would use:
| Code Block |
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getdata.pl pinger.aup.edu.pk 2010-10-02
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Table vs pingtable.pl
Observation
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