[mrtg] Re: Real Numbers in Log cause failure

[Jerry Heidtke]

You need spaces around the mathematical operators.

.1.3.6.1.4.1.9.9.13.1.3.1.3.1&1.3.6.1.4.1.9.9.13.1.3.1.3.2:twtn99 at 10.216
.35.1 * 1.8 + 32

-----Original Message-----
From: Jeffrey Wilkinson [mailto:jeff at ozline.net] 
Sent: Thursday, November 13, 2003 10:16 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Real Numbers in Log cause failure


I'm trying to use mrtg 2.10.5 on Win2000 to monitor temperature.  Values
from our
router are returned in Celcius but we prefer them in Fahrenheit, so we
modified the
Target in mrgt.cfg to *1.8+32.  When we leave as Celcius, integer values
are logged
and graphing works fine.  When converted to Fahrenheit, real numbers are
the result
and logging/graphing fails, as only a single entry containing real
numbers are
logged, no matter how many hours elapse.  I looked at RRDtool but Win32
binaries are
not distributed and we do not have a Visual C++ complier (we are not
software
developers).

My question-- is there an easy way to simply have mrtg round or truncate
the real
number into an integer to store in the log?  We are not concerned with
tenths of a
degree.  I was under the (misguided?) belief that mrtg automatically
rounded, but
this appears not to work.

###########################
#  excerpt from mrtg.cfg
###########################

Target[216.136.29.1.temp]:
.1.3.6.1.4.1.9.9.13.1.3.1.3.1&1.3.6.1.4.1.9.9.13.1.3.1.3.2:twtn99 at 10.216
.35.1*1.8+32
YLegend[216.136.29.1.temp]: Degrees F
ShortLegend[216.136.29.1.temp]: °F
MaxBytes[216.136.29.1.temp]: 100
Options[216.136.29.1.temp]: gauge,nopercent,growright,integer

###########################
#  Excerpt from log file when using
#  fahrenheit (real numbers).
#  Values are correct, but there is
#  never more than a single line
#  even after hours of running
###########################

1068739710 84.2 91.4
1068739410 0 0 0 0
1068739200 0 0 0 0
1068738900 0 0 0 0
1068738600 0 0 0 0
1068738300 0 0 0 0
1068738000 0 0 0 0
1068737700 0 0 0 0
1068737400 0 0 0 0
1068737100 0 0 0 0
1068736800 0 0 0 0
1068736500 0 0 0 0
1068736200 0 0 0 0
1068735900 0 0 0 0
1068735600 0 0 0 0
1068735300 0 0 0 0
1068735000 0 0 0 0
1068734700 0 0 0 0
1068734400 0 0 0 0

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