[rrd-users] Re: rrdfetch resolution

[Alex van den Bogaerdt]

Nuno Emanuel Rodrigues wrote:

> 	I did a rrdtool fetch:
> 	rrdtool fetch TEST.rrd AVERAGE -r 300 -s 1003849200-604800 -e
> 1003849200
> 	As you can see i tried to fetch the values from the last week
> (1003849200 corresponded to the actual time) and what i got was:
[...]
> 	1003838400: 6.3333333333e+00 8.1666666667e+00
> 	1003840200: 3.5000000000e+00 7.6666666667e+00
[...]

The data is 1800 seconds apart.  This is 6*300 seconds.

> I think i created the rra's correctly, with a rrdtool info i get:
> rra[1].cf = "AVERAGE"
> rra[1].rows = 2016
> rra[1].pdp_per_row = 6
         ^^^^^^^^^^^^^^^^
Each row (*one* value) is built from 6 PDPs.  You use 6 PDPs to create
one row.  Each row will represent 6*300 seconds.

HTH
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