[rrd-users] A few Newbie questions

[Erik de Mare]

if you have 1.2.x it can be done this way:
(from the manual http://oss.oetiker.ch/rrdtool/doc/rrdgraph_rpn.en.html)
TOTAL 
Returns the rate from each defined time slot multiplied with the step size.
This can, for instance, return total bytes transfered when you have logged
bytes per second. The time component returns the number of seconds. 
Example: VDEF:total=mydata,TOTAL

or with rrdtool 1.0.x here is a little part from my perl script

push(@data,"--start=-$span");
push(@data,"CDEF:totalin=in,UN,0,in,$span,*,IF");
push(@data,"CDEF:totalout=out,UN,0,out,$span,*,IF");
push(@data,"GPRINT:totalin:AVERAGE:Total traffic\\: %.2lf %s\\n");
push(@data,"GPRINT:totalout:AVERAGE:Total traffic\\: %.2lf %s");

Mvg,
Erik de Mare

On Tue, 5 Feb 2008 23:17:47 +0000, Simon Hobson <linux at thehobsons.co.uk>
wrote:
> apoch632 wrote:
> 
>>I have a set of .rrd databases which give the Internet usage of an IP
>>address over a timeframe. How do I extract this data to be able to say on
> a
>>webpage or terminal that " 'This IP address' has downloaded X bytes this
>>month"
> 
> Average = total/time
> 
> therefore
> 
> total = average * time
> 
> Get average over period, multiply by timespan of period, you have total !
> 
> Just use 'gprint' to print out the average of the data, multiply it
> by time, you get total.
>