First, this is the MRTG forum. This question is better suited to the RRDtool mailing list (see the www.rrdtool.org <http://www.rrdtool.org/> website for details)
Having said that, you'll need to give more information. What is the structure of your RRD? Maybe your format doesn't match your code, or you are not storing correct data. How about a dump of some data? If the file is full of unknowns, then your fetch (and graph) will result in unknowns and no data as well. Do you have a suitable RRA available in the RRD? If not then you won't get anything meaningful. What values are you (trying to) store in the RRD? Are they within the defined range for the DS? You haven't checked the RRDs::error value after the update and graph calls, maybe they are failing for some reason? There's a few places to start. Steve _____ From: [email protected] [mailto:[email protected]] On Behalf Of Gayan S. Amarasiri I am using the following script to draw a graph using rrdtool. But it is not displaying any value. When I check with "rrdtool fetch" command it displayed as "nan". Please help on this.
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