[rrd-users] rrd create update problem
linux at thehobsons.co.uk
Mon Jul 26 11:18:32 CEST 2010
homephilsch at gmx.de wrote:
>My crontab entry:
>30 0 * * * updateRRD.sh
>As you can see the crontab runs successfully (see lastupdate).
>So my question is why I have only NaNs in the dump?
Because you haven't supplied enough updates to "finish" a step
period. Specifically, you've updated at 00:30 for a bin that doesn't
finish until 02:00.
>Why the start time is at 02:00:00 (is the difference caused by the
>UTC-CEST difference )?
> Is it correct to have the heartbeat set to 172800 or should I set
>it to a smaller number?
That entirely depends on your needs.
>I read many tutorials on the web about the rrdtool but I could not
>figure out why my rrd database isn't updated correctly.
In particular, see the tutorial on "Rates, normalizing and consolidating"
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