I actually had a very similar problem where I wanted to add a few targets, but if one target (node) was down, then one of my values was UNDEF which resulted in the whole thing being NaN.
One solution is to first find out if they are UNDEF first, and then assign a value of 0 to UNDEFs and then add them DEF:A=/home/rrd/test1.rrd:ds0:AVERAGE DEF:B=/home/rrd/test1.rrd:ds1:AVERAGE CDEF:Nodes=A,UN,0,A,IF,B,UN,0,A,IF,+ This will turn the UNDEF values into 0 allowing you to get a result if one or more of the values are UNDEF, and not give you NaN. hope this helps Adam On 3/16/03 6:22 AM, "Mohamed Eldesoky" <[EMAIL PROTECTED]> wrote: > Hello > I want to run mrtg so that it sums the values from multiple targets. > MRTG uses rrdtool. > If for some reason, one device is not responding, the whole process stops !! > I think it is something related to NaN phenomena. > Anyone faced something like that ?? > Any work around ?? > > Regards > Mohamed Eldesoky -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
