[rrd-users] Re: bug - rrdgraph calculates 1/10 = 100m, 2/5 = 400m, etc.

[Tobias Oetiker]

Hi Jo,

400m = 400mili = 0.4

http://www.simetric.co.uk/siprefix.htm

cheers
tobi


> Steps to reproduce:
>
> 1. Build an RRD datafile with any RRAs you like.
> 2. Update the RRD datafile with a value of "1" some number of times.
> 3. Build an rrdgraph with this definition
>
> DEF:ds0=/data/rrd/datafile.rrd:ds0:AVERAGE
> CDEF:ds0amps=ds0,10,/
> AREA:ds0amps#00ff00:"amps"
> GPRINT:ds0:AVERAGE:"Real value\: %.1lf"
> GPRINT:ds0amps:AVERAGE:"Average\: %.1lf"
> GPRINT:ds0amps:MAX:"Max\: %.1lf"
>
> rrdtool fetch datafile.rrd AVERAGE
>
> 1140659100: 1.0000000000e+00 1.0000000000e+00
> 1140660000: 1.0000000000e+00 1.0000000000e+00
> 1140660900: 1.0000000000e+00 1.0000000000e+00
> 1140661800: 1.0000000000e+00 1.0000000000e+00
> 1140662700: 1.0000000000e+00 1.0000000000e+00
> 1140663600: 1.0000000000e+00 1.0000000000e+00
> 1140664500: 1.0000000000e+00 1.0000000000e+00
> 1140665400: 1.0000000000e+00 1.0000000000e+00
> 1140666300: 1.0000000000e+00 1.0000000000e+00
> 1140667200: 1.0000000000e+00 1.0000000000e+00
> 1140668100: 1.0000000000e+00 1.0000000000e+00
> 1140669000: 1.0000000000e+00 1.0000000000e+00
>
> POSTNOTE:
>
> More testing confirms that any number less than 1 is a problem.
> Multiplying by .1 creates the same effect.  Dividing 2 by 5 gives you
> 400m, etc.  It's just plain borken ;-)
>
>

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