[mrtg] Re: trying to use external script for graphing

PAUL WILLIAMSON pwilliamson at mandtbank.com
Mon Dec 13 17:03:15 MET 2004

>>> "John Barbieri" <jbarbieri at metrocastcablevision.com> 12/13/2004
10:56:43 AM >>>
>hello list.

hello John.

>im trying to use an external script to do graphing. when i run the 
>script manually, i get output from the script, but nothing appears on

>the graphing.
>the output looks something like this:
>box-prompt: /bin/sh /home/jbarbieri/scripts/netscreen3.sh

Output looks good.

>the numbers do not reset to 0 when they are read, and the DO
>so using gauge wont help for that.
>the number it increments is small, but im not to sure that has
>to do with it, eg, over a 5 minute period, the top number wont move,
>the bottom might move by 5.

<snipped the rest>

The problem is that if the number increments less than 300, you'll 
end up with a number less than one, which MRTG does not 
deal with.

Remember that MRTG does rates per five minutes by default.
If you have a number that is incrementing less than 300 per five 
minutes, you'll end up with a number less than 1, which 
will get dropped.  Either use RRDTool or multiply your 
number by 300 (attacks per 5 minutes).


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