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

[Thomas Peter]

Alex van den Bogaerdt <alex <at> ergens.op.het.net> writes:
> You have an heartbeat of 61 seconds.  If you do not update soon enough,
> then the data source is unknown (as is explained in the documentation).
> 
> Example:
> 
> update at 1156779600  (17:40 METDST)
> update at 1156780200  (17:50 METDST)
> further apart than 61 seconds, so resulting in unknown data for the following
> updates: 1156779660 (17:41) 1156779720 (17:42) ...and so on... 1156780200
> (17:50).

ok, that is how i understood how rrdtool works.
if i do regular updates every minute and then skip updating for 10 minutes,
i missed 10 minutes.

here a snipped from my logs (from OP)

1156740960:15.988933333333334
1156741020:16.98506666666667
1156741080:17.988716666666665
1156741140:18.984933333333334
#quite regular up to now
1156752960:0.9733166666666667
#wow that was a huge step.
1156753860:0.9849666666666667
#but why this ^^ value wasn't inserted? ok i've missed several updates,
but now i continue updating...
1156755660:0.9561166666666666
1156757460:0.9873166666666666
1156757520:1.9875833333333333
#why is this^ update recoded but the others not?
1156763760:0.9849333333333333

so how i supposed it works:
i set stepsize=heartbeat (was the 61 instead of 60 the problem?)
update everytime i get a value (wich is irregular) and don't update
when i have no value.
all values that are missed are regarded as NaN, which is intended.
is it chance, that the values <1.0 are missed and i don't see the real problem?

thanx,
thomas


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