On Fri, Jul 04, 2008 at 01:43:45PM +0200, Karl Fischer wrote: > I'm using rrdtool 1.23 and I'd like to display a value as LINE1 *only* > if it fits into the current scale without affecting the scale (pretty > much like HRULE, however, the value is going to be calculated and may > change over time, so I can't use HRULE ... > > Therefor I need to know, what my current (y) scale is, so I tried to > use MAXIMUM as a workaround, but that doesn't work since VDEF variables > cannot be used in CDEF as it seems ... :-( > > theoretical idea to display a warning line at 90% of max cap only if > the used cap gets any near the 90% limit (so the warning line itself > doesn't affect the scale): > > DEF:maxcap=some.rrd:maxcapacity:LAST > DEF:usedcap=some.rrd:usedcapacity:LAST > CDEF:warnlimit=maxcap,0.9,* > CDEF:help=warnlimit,0.9,* > VDEF:usedmax=usedcap,MAXIMUM > CDEF:warnline=usedmax,help,GT,warnlimit,UKNN,IF # this doesn't work > AREA:usedcap#0000ff:used capacity > LINE1:warnline#ff0000:90% full
What is version 1.23 and does it know VDEF ? Does your CDEF:warnline work when you change 'usedmax' in a number ? see attached files which I just created as a test (using 1.2.12, which just happened to be in my path) -- Alex van den Bogaerdt http://www.vandenbogaerdt.nl/rrdtool/
#!/bin/bash S=1215122400 rrdtool create test.rrd \ --start $S \ --step 60 \ DS:max:GAUGE:600:U:U \ DS:use:GAUGE:600:U:U \ RRA:AVERAGE:0:1:5 E=$S E=$((E+60));rrdtool update test.rrd $E:50:44 E=$((E+60));rrdtool update test.rrd $E:100:45 E=$((E+60));rrdtool update test.rrd $E:100:46 E=$((E+60));rrdtool update test.rrd $E:50:47 E=$((E+60));rrdtool update test.rrd $E:50:40 rrdtool graph test.png \ --start $S \ --end $E \ DEF:max=test.rrd:max:AVERAGE \ DEF:use=test.rrd:use:AVERAGE \ CDEF:warnlimit=max,0.9,* \ CDEF:helplimit=warnlimit,0.9,* \ VDEF:usemax=use,MAXIMUM \ CDEF:warnline=usemax,helplimit,GT,warnlimit,UNKN,IF \ COMMENT:" max avg min\n" \ AREA:use#0000FF:"Used Capacity" \ GPRINT:use:MAX:%6.2lf \ GPRINT:use:AVERAGE:%6.2lf \ GPRINT:use:MIN:%6.2lf\\n \ LINE1:warnline#FF0000:"90 perct full" \ GPRINT:warnline:MAX:%6.2lf \ GPRINT:warnline:AVERAGE:%6.2lf \ GPRINT:warnline:MIN:%6.2lf\\n \ COMMENT:DEBUG\\:helplimit \ GPRINT:helplimit:MAX:%6.2lf \ GPRINT:helplimit:AVERAGE:%6.2lf \ GPRINT:helplimit:MIN:%6.2lf\\n \ COMMENT:DEBUG\\:warnlimit \ GPRINT:warnlimit:MAX:%6.2lf \ GPRINT:warnlimit:AVERAGE:%6.2lf \ GPRINT:warnlimit:MIN:%6.2lf\\n \ COMMENT:DEBUG\\:"usemax " \ GPRINT:usemax:%6.2lf \
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test.rrd
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