[mrtg] math in Target

[Koelstra, J. (Jan)]

There are 2 ways to tackle this:

1. Have the maths on the targetline:
Target[daw1_temps]: .1.3.6.1.4.1.2021.13.16.2.1.2.1:public at daw1&.1.3.6.1.4.1.2021.13.16.2.1.2.2:public at daw1 / 1000
(note: the same maths are always done on both values)
The disadvantage for this method: Your temperature graph will show steps of 1 degree. (MRTG rounds fractions down) The values stored in the .log file are the rounded down values.

2. Use both the 'factor' and 'YTicsFatcor' option:
Factor[daw1_temps]: 0.001
YTicsFactor[daw1_temps]: 0.001

HTH,

Jan.
 

-----Original Message-----
From: mrtg-bounces at lists.oetiker.ch [mailto:mrtg-bounces at lists.oetiker.ch] On Behalf Of R Dicaire
Sent: Sunday, March 09, 2008 12:41 AM
To: mrtg at lists.oetiker.ch
Subject: [mrtg] math in Target


Hi...I'm pulling data via snmp that returns a 5 char result:

UCD-SNMP-MIB::ucdExperimental.16.2.1.3.1 = Gauge32: 39000

This is CPU temperature. My target gets CPU and motherboard temps, both return 5 char as results. I'm trying to perform math on these results but it looks like I don't understand the docs on how this is performed. My target line:

Target[daw1_temps]: .1.3.6.1.4.1.2021.13.16.2.1.2.1:public at daw1 / 1000 &.1.3.6.1.4.1.2021.13.16.2.1.2.2:public at daw1 / 1000

(Forgive any linewrapping, I have left the requisite white space around the math expr)

Is this not possible on the target line, or must some other means be used to get the desired result, and if so, how? Thanks

-- 
aRDy Music and Rick Dicaire present:
http://www.ardynet.com http://www.ardynet.com:9000/ardymusic.ogg.m3u

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