Thanks alot Adam for the reply. Well, I am using cacti ( http://www.raxnet.net ) as my frontend. So it is hard to implement that method. Plus, I have many targets (100+) that are changing alot (dynamic list of targets). If I use the specified method, imagine this scenario with me. january : I have 110 targets, I graph the total for those 110 devices. Feb: I have 105 targets, I need to graph the total of those 105, and preserve the total of the 110 that was graphed in february. Actually I tried to get the totals manually through a script and update an rrd file with it, but it gave me really strange results. I have posted that problem here before, and I still have the script that did it, if you want to have a look.
I think the best solution now is to let mrtg (my collector) sum the tragets and give me the final result, but it fails when it encounters a non-responding device. Any idea ?? Regards M. Eldesoky On Sunday 16 March 2003 7:09 pm, Adam Denenberg wrote: > 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. > 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 ?? Person who say it cannot be done should not interrupt person doing it. --Chinese Proverb -- 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
