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xnmgraph: Input Data Extensibility

To: nv-l@lists.tivoli.com
Subject: xnmgraph: Input Data Extensibility
From: Doron Shikmoni <doron@ISOC.ORG.IL>
Date: Mon, 19 Apr 1999 12:53:42 IST
Reply-to: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>
Sender: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>

I've been using xnmgraph extensively. Recently, I have a need to
use the Input Data Extensibility feature. Towards that end, I have
run into a few issues. I would be grateful if anyone could offer
me a solution to any or all...

1. Rate of change. The input data I'm using for xnmgraph is actually
   representing a counter (octet count), although it does not come
   from a MIB var. However, I didn't find any way to tell xnmgraph
   that the variable is a counter (and so, graph it as a "rate of change").
   xnmgraph insists on drawing the actual measured data - which is,
   obviously, not useful. I could write a script to pipe stdin through,
   that will calculate the diffs etc. - but, is this really the only

2. "printOnly" option. I'm using this option extensively with the SNMP
   collection (drawing graphs in the background, that eventually make
   their way into web pages as gifs). For SNMP variable monitoring,
   it works nicely: it will display the complete graph, then issue the
   print command. When I use it with the Input Data Extensibility, though,
   the graph displays only half-way through (not all points being displayed!),
   and then the "printOnly" kicks in. I end up with a partial graph -
   even though I have data points until 12:00 PM, the lines terminate
   at 09:30 (for example).
   How can I deal with this? Is there a way to tell xnmgraph to go through
   all data points and *then* print? (I would hate to go into forking
   and then doing SIGs - just for that...).

Thanks for any enlightment!

Doron Shikmoni

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