[drraw-users] Stddevs and averages of multiple rrd source files

[Christophe Kalt]

On Apr 19, Fabien Wernli wrote:
| On Thu, Apr 19, 2007 at 07:49:28AM -0700, Mark Noworolski wrote:
| > I have multiple rrds, say: file1.rrd, file2.rrd, file3.rrd, etc. (basically
| > all the files in a certain directory). Each file is identical, in terms of
| > data sources (let's say each one contains temperature readings).
| 
| I believe you can only apply simple operations, like the sum, see
| 'drraw.cgi?Browse=Help#dsconfig', in item 'Data Source>Data Source Template'

Right, although it shouldn't be very hard to extend.
Before i get into this, i'd like to have get a somewhat
exhaustive list of what people are likely to want but isn't
possible with the current system.

Note that we're bound to be limited by what rrdtool offers.

Thoughts?