[rrd-users] Strage values in RRD

Simon Hobson linux at thehobsons.co.uk
Mon Feb 25 11:52:56 CET 2008

Sven Schmidt wrote:

>It says:"If you want to get out exactly what you put in, you have to
>make sure that you provide your input exactly at the step boundaries"
>My RRD:
>rrdtool create spam-m.rrd --step 60 --start now \
>  DS:relay:GAUGE:62:0:U \
>  DS:blacklist:GAUGE:62:0:U \
>  DS:hosts:GAUGE:62:0:U \
>  DS:user:GAUGE:62:0:U \
>  DS:sender:GAUGE:62:0:U \
>  RRA:AVERAGE:0.5:1:60 \
>  RRA:AVERAGE:0.5:60:1440 \
>  RRA:MAX:0.5:1:60 \
>  RRA:MAX:0.5:60:1440 \
>I am putting every minute data in it.

Provide examples.

It's not sufficient to provide data every minute, the timestamps MUST 
be EXACTLY right. For example :

1203936632 and 1203936692 are one minute apart but are NOT on the 
step boundaries.

1203936600 and 1203936660 are.

If the data you provide does not EXACTLY fill ONE 'slot' in the 
database for each update supplied, then the data will be normalised 
to fit.

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