[rrd-users] graphing two different time-domains on the same plot
majewski at cs.ubc.ca
Thu May 23 20:28:30 MEST 2002
I need to generate a plot with two curves. One curve shows router
traffic on port X for day Y. Suppose Y is a Monday. The other curve
then shows router traffic on port X averaged over all the Mondays in
some month Z, where Z is chosen by you, the user.
Now, I've already got the rrd's for the data (for how I handle the
monthly averages, see my previous post to this list). The problem
is graphing it. The crux is that the first curve has, in general, a
different time domain (--start and --end time) than the second curve.
(My monthly data takes on the time domain of the first Monday in month
Z, again assuming that Y is a Monday). I guess I could write an awk
script to generate a copy of either the daily or monthly data, with a
"transposed" time domain. But doing this on-line is painfully slow
(over 10 seconds). Is there some way to time-shift data on-the-fly?
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