Alternatively, you can use rrdfetch to fetch the datapoints and use PHP or whatever to find the max/min. This is an implementation using rrd extension for PHP (which is quite a bit faster than doing a system call for the rrdtool executable):
http://sourceforge.net/apps/trac/ganglia/changeset/2590 Cheers, Bernard On Tue, May 10, 2011 at 6:37 AM, Vladimir Vuksan <vli...@veus.hr> wrote: > You can extract MAX and MIN using rrdtool. We use something similar in the > GUI e.g. > > https://github.com/vvuksan/ganglia-misc/blob/master/ganglia-web/functions.php#L234 > > $command = $conf['rrdtool'] . " graph /dev/null $rrd_options ". > "--start $start --end $end ". > "DEF:limits='$rrd_dir/$metricname.rrd':'sum':AVERAGE ". > "PRINT:limits:MAX:%.2lf ". > "PRINT:limits:MIN:%.2lf"; > > > this code snippet will find MIN and MAX of the RRD for the specified time > period. > > Hope that helps. > > Vladimir > > On Fri, 6 May 2011, Indranil C wrote: > >> Hi, I have really run out of ideas on this one. Could someone please help >> me with a way fo >> getting the MAX of MAX CF values which I can extract from a RRD file using >> either rrdtool >> xport or fetch? Any other way would do for me as well. >> >> I can get sample data like the following: >> rrdtool fetch /var/lib/ganglia/rrds/Pages/202.137.237.139/restlatency.rrd >> AVERAGE -s -10h -e >> -9h >> sum >> >> 1304650440: 2.7163888889e+01 >> 1304650800: 9.1333333333e+00 >> 1304651160: 1.8080555556e+01 >> 1304651520: 1.8580555556e+01 >> 1304651880: 4.6077777778e+01 >> 1304652240: 2.1300000000e+01 >> 1304652600: 2.0927777778e+01 >> 1304652960: 2.2538888889e+01 >> 1304653320: 1.6552777778e+01 >> 1304653680: 3.3350000000e+01 >> 1304654040: 4.3622222222e+01 >> >> >> So, now how do I fetch the MAX among the above. I can obviously use shell >> commands. But I >> was wondering if there is an inherent way in rrdtool to do this. Thanks. >> >> Thanks, >> Neel >> >> Treat yourself at a restaurant, spa, resort and much more with Rediff Deal >> ho jaye! >> > > ------------------------------------------------------------------------------ > Achieve unprecedented app performance and reliability > What every C/C++ and Fortran developer should know. > Learn how Intel has extended the reach of its next-generation tools > to help boost performance applications - inlcuding clusters. > http://p.sf.net/sfu/intel-dev2devmay > _______________________________________________ > Ganglia-general mailing list > Ganglia-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ganglia-general > > ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Ganglia-general mailing list Ganglia-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-general
