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
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