[rrd-users] Trend of Daily Peaks

Kyle Brandt kyle at kbrandt.com
Wed Feb 9 21:00:56 CET 2011

If possible I would really like to do it all in the graph.

To define the peak mathematically something like the following would
be ideal. Break the day into hour blocks and average out of the
bandwidth usage of the blocks. Then take that result and pick the
highest value block as the peak value for the day.  Lastly, trend
these values over a larger period of time. This seems like something
that would be easy to do in the rra originally -- but I want to work
with existing data.

Does that make sense?

On Wed, Feb 9, 2011 at 2:51 PM, Karl Fischer <rrd-users at ficos.de> wrote:
> Am 09.02.2011 20:09, schrieb Kyle Brandt:
>> A lot of my data peaks each day during the busiest hours, so the
>> graphs basically form a wave. Is there a way I can CDEF a trend that
>> is the trend of these peaks instead of the full set of data?
> only if you can mathematically define what a peak is.
> Let's say you could CDEF/VDEF the AVERAGE and the MAX over the entire
> period and then define that everything between AVG & MAX is a peak.
> That could be trended ... but that's probably not what you want.
> You could also define a new rra::MAX with a period of maybe 1 hour
> and then trend the values out of this rra ...
> I have similar problems where a certain behavior is easy to spot
> visually but almost impossible to define mathematically ...
> - Karl

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