[rrd-users] Re: Calculating traffic

Iñaki Martínez sistema at euskal-linux.org
Tue Jun 25 11:22:25 MEST 2002

Hi Alex van den Bogaerdt!!!

 First, thanks for answering.... 

> >  so, i look at the number...
> > 
> >  36159401
> >  36148921 lesser
> >  36220119
> > 
> >  Some times i've got confusing numbers....
> > 
> >  have i something wrong??????
> How so?  You're calculating the number of bytes send during the
> *last*two*hours*.  If you slow down sending (a lower rate) then
> the total amount will be lower.
> In extremis:  if you stop sending traffic at all and do the calculation
> again after two hours, the total will become 0.  This is true because
> you didn't send any byte *during*the*last*two*hours*.

 Well.... i will start form the beginning....

 The rrd file......

  rrdtool create port_xxx.rdd --step 60 \
  DS:in:COUNTER:600:U:U                 \
  DS:out:COUNTER:600:U:U                \
  RRA:AVERAGE:0.5:1:600                 \
  RRA:AVERAGE:0.5:6:700                 \
  RRA:AVERAGE:0.5:24:775                \
  RRA:AVERAGE:0.5:288:3725              \
  RRA:MAX:0.5:1:1:600                   \
  RRA:MAX:0.5:6:700                     \
  RRA:MAX:0.5:24:775                    \

 3725 = 5 years!!!!

 I get via snmp each minute the trafic from the switch port xxx.

 How can i do this better???

 I mean, the rrd file is saving each 5 minutes while i get data each minute.
 I do not understand very well the structure of the rrd file.

 The graphic (new update):

  --start -2h
  --end now
  AREA:in#00FF00:"IN  "
  GPRINT:tin:AVERAGE:"B/s\: %9.0lf "
  GPRINT:in:MAX:"Max\: %9.0lf "
  GPRINT:in:AVERAGE:"Ave\: %6.0lf "
  GPRINT:in:LAST:"Cur\: %6.0lf\c"
  LINE1:out#0000FF:"Out "
  GPRINT:tout:AVERAGE:"B/s\: %9.0lf "
  GPRINT:out:MAX:"Max\: %9.0lf "
  GPRINT:out:AVERAGE:"Ave\: %6.0lf "
  GPRINT:out:LAST:"cur\: %6.0lf\c" >

 One thing i do not like is that IN (green) area is very rough, i think
that is problem of the rrd file that save each five minutes.

 Is it all OK?????

 Is there something that i can improve???

 Thanks in advance to all answers!!!!!!


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