[rrd-users] Re: rrdtool missed values <1.0

Thomas Peter thomas at braindumped.com
Fri Sep 1 15:22:01 MEST 2006

William Owen <William.Owen <at> profilesmail.com> writes:
> Not to discourage this discussion of the relationship between heartbeat
> and step but:
> Thomas, you state that you are parsing a log file looking for markers
> (start and end) that you then calculate the difference of and log into
> RRD?  If I'm reading that right, you are doing a periodic poll of this
> log file.  I would do an update to your RRD every time this script is
> run.  If you do not find a start marker, update with 0 (or nan depending
> how you want it to show up).  If you find a start marker and no end
> marker, update with now-start.  If you find a start and end marker,
> update with end-start.  This should produce the steadily increasing
> slope that drops to 0 when the condition is not met.  In this scenario
> you would want a step of <script interval> and a heartbeat of <script
> interval + some seconds depending on predictability of script>.

thanx william.
that's what i'm dooing now.

and since i don't want rrdtool to manipulate my values, i use explicit 
update-times in multiples of stepsize.
(i hope i can prevent rrdtool from doing normalisation and stuff, doing this)
so i can set my --heartbeat to --step!?


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