[rrd-users] Getting average for a month from rrd file with no sd's

[Simon Hobson]

J Bell wrote:

>I'm new to the wonderful world of munin and rrdtool. I'm tearing my 
>hair out trying to do what looks simple--get a single number showing 
>me an average for a whole month of data. For example:
>
>rrdtool fetch puma-iostat-dev22_0_read-d.rrd AVERAGE --start 
>20070401 --end 20070430 -r 2764800
>
>This outputs 32 lines, in spite of a resolution of 32 days. I could 
>use Excel or whatever to average those figures, but I'm not sure I'm 
>getting the right data to begin with. I've tried variations with 
>rrdtool graph instead, and that's even harder, as the file 
>(according to rrdtool info) has no ds's at all.
>
>Again, my intention is simply, for a given variable, get its average 
>over a month's worth of data. Does anyone know the right way to do 
>that?

Try http://www.vandenbogaerdt.nl/rrdtool/total.php, you just don't 
need to multiply by time since you are after average and not total.