On Tue, Mar 2, 2010 at 07:34, McGraw, Robert P <rmcgraw at purdue.edu> wrote:

I deciced to change my status line from Printer Cartridge Counter = $SNMPTONERCOUNTER to Printer Toner Cartridge Counter = $SNMPTONERCOUNTER and started getting the dreaded error "unknown DS name 'PrinterTonerCartrid' Q1) Is is possible to dump the file edit the name from 'PrinterCartridgeCo' to 'PrinterTonerCartrid' and the restore?

Yes, try a "man rrdrestore". You'd do an rrdtool dump, then edit the XML file, then rrdtool restore. At least, that's how it's documented.

My status line look as follows: LINE="status $TARGETHOST.Prn $COLOR date

       Printer Counter = $SNMPPAGECOUNTER Printer Cartridge Counter = $SNMPTONERCOUNTER Total Pages Printed Since $SINCE When We Started Counting = $PAGESPRINTED Delta Pages Printed = $DELTAPAGESPRINTED " All I want to plot is the Delta Pages Printer = line.

Q2) Is there a way to tell rrd to ignore other lines that I added to the status?

And here I thought you also wanted the Printer [Toner] Cartridge Counter too. If it's only the one value, you could use: NCV_Prn="DeltaPagesPrinter:GAUGE,*:NONE"

but that's only if the RRD file doesn't already have them. You could erase/rename your RRD and start anew, or you can try to split it somehow. There's probably a utility for isolating DSs from an RRD, but that's better asked in an RRDTOOL forum. If you want to rename now and attempt to split/merge later, there's definitely a utility for merging RRD history; I've used "merge-rrd.tgz" (merged-rrd.py, 2005-04-11) for that.

If you anticipate changing the number of values available for graphing (or other analysis) in the future, you might consider using splitncv instead. TEST2RRD is unchanged, but NCV_Prn becomes SPLITNCV_Prn: SPLITNCV_Prn="DeltaPagesPrinter:GAUGE,*:NONE"