Wednesday Johan Ström wrote: > On 02/02/16 23:35, Steve Shipway wrote: > > > DEF:rawmax=myfile.rrd:value:MAX > > > CDEF:vmax=rawmax,85.00,EQ,NaN,rawmax,IF > > 'NaN' is not a valid RPN symbol in RRDTool. You should use UNKN instead. > > Also watch out for typos like embedded spaces or doubled commas. > Tobi, Steve, > > thanks for help! I tried replacing NaN with UNKN in one failing location now, > and that worked. > I *did* try that the other day, but in another location. And this location > still has an issue, even with UNKN. But this seems to be related to the use of > "-" in the var names: > > DEF:rawmaxout-north-air=file.rrd:value:MAX > CDEF:vmaxout-north-air=rawmaxout-north-air,85.00,EQ,UNKN,rawmaxout-north-air,IF > > ERROR: don't understand 'rawmaxout-north,85.00,EQ,UNKN,rawmaxout-north,IF' > > By replacing - with _, it now works great. However, I expected "-" to be a > valid variable? > > "Variable names (/vname/) must be made up strings of the following > characters|A-Z, a-z, 0-9, -,_|and a maximum length of 255 characters." > http://oss.oetiker.ch/rrdtool/doc/rrdgraph_data.en.html
in that case the documentation needs to be fixed I guess ... :) > > > > CDEF:vmax=rawmax,85,EQ,UNKN,rawmax,IF > > > > This will convert 85 into unknown. However, with this value potentially > > being a non-integer, due to Data Normalisation, the test may never return > > true (as 85.00001 is not equal to 85). Maybe instead try... > > > > CDEF:vmax=rawmax,85,GE,rawmax,86,LT,AND,UNKN,rawmax,IF > > > > Though, I'm not sure what you're trying to achieve by only excluding value > > 85. > Hm, so even if I store exactly 85 (in a gauge), data normalization may turn > this into something else? > > The value 85.00 is used in my source device (1-Wire temp sensors) to indicate > a read failure. I actually think I filter out this nowadays, this script has > some legacy... so may not even be required here come to think about it! > > Well, my current issue is resolved, may look into the above potential issue > too. > > Thanks! > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland www.oetiker.ch t...@oetiker.ch +41 62 775 9902
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