[rrd-users] Re: Errors in CGI's?: comparing 14all.cgi, routers2.cgi, mrtg-rrd.cgi

Alex van den Bogaerdt alex at ergens.op.het.net
Thu Nov 27 00:49:35 MET 2003

On Wed, Nov 26, 2003 at 03:32:04PM -0800, Steve Smith wrote:
> Hi,
>     I am using mrtg 2-10.5, rrdtool 1.0.45, and have been testing the above
> three CGI's to verify their accuracy. All three use the same .rrd files. The
> CGI's are also the latest versions of each.
> I've notice that 14all.cgi and routers.cgi tend to agree with each other
> most of the time, but mrtg-rrd.cgi. is always lower with respect to the
> maximums, and differs with respect to average and current values.  The
> differences are not a consistent percentage. This occurs with several
> devices, an application, a switch, and a mail appliance. 14all provides
> logging for the graph commands which helps, but I haven't had time to
> capture the output other CGIs' graph commands so I'm not sure if they are
> plotting the same ranges or not.

Just some input in case someone else starts debugging:

    GPRINT ds0:AVERAGE:"%6.2lf"
    GPRINT ds0:MAX:"%6.2lf"

produces different numbers than

    GPRINT ds0:AVERAGE:"%6.2lf"
    GPRINT ds0m:MAX:"%6.2lf"

unless the graph happens to be exactly as wide as the number of
rows fetched from the database.

This is a direct result from



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