[rrd-users] Adding single datapoints to a RRDdatabase

[cruz]

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? 



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