[rrd-users] rrdtool with unregular data flow

[Maik Töpfer]

Hello,

I'm trying to set up the rrdtool in an environment where no real  
static information flow exists. This means sometimes data arrives  
more often sometimes it doesn't arrive at  all.
Although I know that rrdtool has been designed for a regular data  
input I like the idea of the round robin database very much.

What I did:

I set up a database file:

rrdtool create maik.rrd --step 2 DS:fts:GAUGE:2:U:U RRA:AVERAGE: 
0.5:1:3600

now i'm trying to enter data. This should allow me half an hour of  
data storage.

when data would be inserted in the following time line

1 second: 100
2 seconds: nothing
3 seconds: nothing
4 seconds: nothing
5 seconds: nothing
6 seconds 120
7 seconds: nothing
...
19 seconds: nothing
20 seconds 140

than i expected to fetch something like

timestamp:100
timestamp:na
timestamp:na
timestamp:120
timestamp:na
...
timestamp:na
timestamp:140

but instead i see most of time only timestamp:na

I don't want to extend the heartbeat intervall too much since in some  
areas i will have a constant dataflow, in some not. But I rather want  
to display the fact that there where no data points (na) than  
consolidating the data over a longer intervall.

what can i do to see the actual stored data with the fetch command if  
there are also bigger gaps between certain datapoints?

Thanks,

Maik

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