[rrd-users] newbie rrd question - probably a very old issue

Tobias Oetiker tobi at oetiker.ch
Sat Sep 1 20:45:19 CEST 2007


if you want to have this, you create TWO rras, one with MIN and one
with MAX consolidation.

in the graph you draw

MIN and stack MAX-MIN on top of it and you get that 'magic' graph
dans seems to be looking for ... it will look odd, since it will
change its 'width' depending on the distance between min and max,
but I can't see how he expects this to work any other way ...

I wonder what his nsdaq graph does if in a single day there is an
extreem high and and extreem low, but there is only a single pixel
in the graph to represent that day ...


Today Jason Fesler wrote:

> Based on a side conversation with Dan, this is what I'm understanding:
> RRD will graph exactly one consolidated point in time, if there are more
> points than pixels on the X axis.  Dan wants *all* value points represented,
> not consolidated.  RRD has no option to do that.
> I'm thinking that *maybe* it can be faked, with some stacked graphs or
> something, *if* MIN and MAX were also included in the rrd file; do a fill
> between min and max.
> But it isn't going to happen with a single graph statement, and I'm having
> problems figuring out how to sanely show min/average/max if desired. :-)

Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902

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