[rrd-users] Undesired fractions

[Alex van den Bogaerdt]

On Tue, Dec 18, 2007 at 10:22:55AM -0500, Tuc at T-B-O-H.NET wrote:

> 	Ok, thank you. The only real last question that still isn't
> making sense is the "LAST" CF. Is there more details of it
> (IE: Example) somewhere?

Consolidation is taking some amount of data points together and
form one consolidated datapoint.  For instance, in MRTG, part of
the data has a 5-minute resolution and part has a 30-minute resolution.

Say the rates to consolidate are:  1.0 0.5 0.5 1.5 1.7 0.8
then

AVERAGE results in 1.0 because (1.0+0.5+0.5+1.5+1.7+0.8)/6=1.0
MIN results in     0.5 because it is the lowest rate seen
MAX results in     1.5 because it is the highest rate seen
LAST results in    0.8 because it is the last rate seen

Don't ask me when LAST would be useful. I wouldn't know.

-- 
Alex van den Bogaerdt
http://www.vandenbogaerdt.nl/rrdtool/