hi,
I want to fetch data from rrd in several time resolution steps. I
followed http://oss.oetiker.ch/rrdtool/doc/rrdfetch.en.html.
But it doesn't give back data in the precision I request (either 600 or
900 seconds). It simply gives back 5 minutes increments. If I set 1200
sec as precision it the suddenly jumps to 30 minutes (1800 sec).
I am sure I misunderstand something about the --resolution parameter.
fetch script:
===
# static base time for easier testing/play-around
TIME=1299093300
RRDRES=900
rrdtool fetch
/var/lib/munin/localdomain/localhost.localdomain-cpu-idle-d.rrd AVERAGE
-r $RRDRES -e $(($TIME/$RRDRES*$RRDRES)) -s e-2h | awk '{print $0;print
strftime("%Y/%m/%d-%H:%M",$1)}'
returned data (get 5 minute increments instead of 900 sec = 15 minutes):
===
2011/03/02-18:20
1299086700: -nan
2011/03/02-18:25
1299087000: -nan
2011/03/02-18:30
....
2011/03/02-20:05
1299093000: 1.9164289439e+02
2011/03/02-20:10
1299093300: 1.8967866452e+02
2011/03/02-20:15
1299093600: -nan
2011/03/02-20:20
What is the right way to get the right resolutions back? I am using
rrdtool 1.3.8.
--
manuel aldana
[email protected]
software-engineering blog: http://www.aldana-online.de
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