[rrd-users] Adding single datapoints to a RRDdatabase

[Alex van den Bogaerdt]

----- Original Message ----- 
From: "cruz" <Cruzader at gmx.de>
To: <rrd-users at lists.oetiker.ch>
Sent: Thursday, February 19, 2009 3:16 PM
Subject: [rrd-users] Adding single datapoints to a RRDdatabase


>
> Hi,
>
> I'm trying to insert single data points into my RRD database.
>
> Create the database:
>> rrdtool create test.rrd --start 900000000 DS:speed:GAUGE:300:U:U
>> RRA:AVERAGE:0.5:1:24
> adding data:
>> rrdtool update test.rrd 900000900:1234
>
> Without adding any further data my '1234' won't occure in the RRA.
>> rrdtool dump test.rrd
> [snip]
>    <!-- 1998-07-09 18:10:00 CEST / 900000600 --> <row><v> NaN </v></row>
>    <!-- 1998-07-09 18:15:00 CEST / 900000900 --> <row><v> NaN </v></row>
> </database>
> [/snap]
>
> Neither changing the consolidation function nor tweaking the xfiles factor
> will result in any different behavior.
> Any ideas how to get my '1234' into the RRA?

You are saying that between time 900000000 and 900000900 the rate was 1234.
But that time interval is 900 seconds long.  You also told RRDtool to ignore 
rates if updates are further apart than 300 seconds, and so it did.

Change that 300 into (for instance) 300, and you'll see your data, although 
maybe not in the way you expected.

HTH
Alex