[rrd-users] Re: changing steps?

Alex van den Bogaerdt alex at ergens.op.HET.NET
Tue Aug 27 10:37:02 MEST 2002

rrdtool at schwartz.shutdown.com wrote:

> I have table set up with a stepping of 1 minute (overkill, I know) and I'm

Not necessarily overkill.  If you have (besides your AVERAGE RRA) a MIN
and/or a MAX RRA, you will get numbers that are more "real" than the
default of 5-minute step sizes.

> able to graph everything fine and honky dorey, but the same management that
> wants that same granularity is also confused by the relatively low numbers,
> despite the fact that they're per minute.

Are they?  If your DST is either COUNTER, ABSOLUTE or DERIVE, you're
storing *per-second* data.  If doesn't matter in that case what your
step size is.

> So, I'm wondering if it's at all possible to take the averages and actually
> do a per hourly graph? I've done everything I can think of with playing with
> the CDEF, but limiting the graph to those new steps is difficult at best.

You mean: they want to see "between 8am and 9am: foo", "between 9am and
10am: bar" sort of statistics?

To actually get the per-hour numbers just multiply by 3600 in
a CDEF and use the result to GPRINT.
To *see* those blocks in the image, try "--step 3600" and display
the resulting CDEF with LINEx or AREA.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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