[rrd-users] value and name both

Tobias Oetiker tobi at oetiker.ch
Thu Nov 17 15:27:08 CET 2011

Hi Shabnam,

you could do it using multiple CDEF expressions, using the IF
function, looking at each var in turn, comparing it with the
maximum earlier found.


Today Shabnam Shahreza wrote:

> Since I got no answer on this should I consider that this can't be done at all?
> I mean along with the values to draw the graph I need to know what was the source of this "interesting" value (which is maximum here - I even keep it in the name of the variable to see if I can use it later)....
> Any idea?
> Regards;
> Sbnm
> From: Shabnam Shahreza
> Sent: Wednesday, November 16, 2011 10:33 AM
> To: rrd-users at lists.oetiker.ch
> Subject: value and name both
> Hi everyone:
> Imagine that I have something like this (please ignore if the syntax if not 100% correct - it is more complicated in my script)
> "CDEF:name=var1,var2,var3,var4,... <number of variables>,SORT, POP"
> This gives me the maximum (although I had to use REV as well.. by this is working in my script fine....ignore the syntax please)
> My question is how can I find which one of those "variables" [var1,var2, .... ] was the maximum?!!
> I want not only the value but also the "name" of the variable as it has some good information for me....
> Regards;
> Shabnam Shahreza
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