[mrtg] Re: unknaszero]

[fluhmann at vvm.com]

On Monday 24 March 2003 11:25 pm, fluhmann at vvm.com wrote:
> > -------- Original Message --------
> > Subject: [mrtg] Re: unknaszero
> > Date: Mon, 24 Mar 2003 10:49:56 +0200
> > From: "M.E. "
> > To: George Chelidze
> > CC: mrtg at list.ee.ethz.ch
> > References: <3E7AC5A5.70605 at geo.net.ge>
> > <89915561359.20030322073724 at acsalaska.net> <3E7EC517.9010604 at geo.net.ge>
> >
> >
> > I use MRTG with RRDTool
> > I want to make the rrdtool to store ZERO instead of the famous NaN
>
> My test on using unknaszero show a value of 0.0000000000e+000 being stored
> in the *.rrd
>
> > Also, I want to graph the sum of multiple interfaces using the summing
> > capability of MRTG, but when one of the interfaces is down ( or doesn't
> > return data ) the porcess stops.
>
> The way that we graph the sum of multiple interfaces is by using the
> 'graph' function of RRDTool.
> Here as an example of what we do (ex. using 3 interfaces):
>
> c:\mrtg\rrdtool\bin\rrdtool graph aggregate.png --imgformat PNG --width
> 650 --height 150
> DEF:onex=64.39.30.21_23.rrd:ds0:AVERAGE
> DEF:oney=64.39.30.21_23.rrd:ds1:AVERAGE
> DEF:twox=64.39.30.21_24.rrd:ds0:AVERAGE
> DEF:twoy=64.39.30.21_24.rrd:ds1:AVERAGE
> DEF:threex=64.39.30.21_25.rrd:ds0:AVERAGE
> DEF:threey=64.39.30.21_25.rrd:ds1:AVERAGE
> CDEF:myxx=onex,twox,threex,+,+,8,*
> CDEF:myyy=oney,twoy,threey,+,+,8,*
> CDEF:myzz=myxx,myyy,+
> AREA:myxx#00ff00:"Incoming Traffic (AVERAGE)"
> LINE1:myyy#0000ff:"Outgoing Traffic (AVERAGE)"
> LINE2:myzz#ff0000:"Total traffic  (in+out)"
>
> You might want to look at RRDTool's documentation on 'graph' and 'create'
> for an explanation.  We use them in a web page where the user can select
> the interface(s) that they want to see an aggregate graph of.
>
> Hope that helps,
> Jeremy
>

Thanks Jeremy
I know all of that, and I know how to use rrdtool under Linux.
The problem is that I use a  frontend (cacti), hence I can't use the graph
function directly.
I need MRTG to generate one rrd file that contain the totals.
Yeah, summing through cacti is not easy.

Regards
Mohamed Eldesoky


I don't have any experience with cacti, but I created a Graph
Administration page for our company to use the graph function of RRDTool
through a web interface with the RRDs.pm module.  We choose what
interfaces we want to see a total for and generate the PNG graph.  I don't
know if that would help.  My 'first' trial at something similar to what
you're trying to do, was to also create one rrd file that contained the
totals, but I couldn't get it to work.  I'll try and look at 'cacti' and
see if I can come up with anything. (probably not)

Sorry my info didn't help,

Jeremy Fluhmann



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