On Mon, Sep 19, 2011 at 8:18 PM, Tobias Oetiker <[email protected]> wrote:
> > Can someone explain what is happening in this example? I would like to > > compute a trend along with my data. > > > > $ rrdtool create temp.rrd --step 1 DS:temp:GAUGE:30:0:U > > DS:trend:COMPUTE:temp,10,TRENDNAN RRA:AVERAGE:0.5:1:10 > > $ rrdtool update temp.rrd N:3 > > ERROR: temp.rrd: malformed trend arguments > > > this might be stretching the COMPUTE data source type a bit ... > normally TREND(NAN) is used in CDEF arements of rrd graph. any > particular reason you wand to compute this ahead of presentation? > Tobi, I was just experimenting with this feature. Right now I'm using RRDTool as a backend database for a web service. I'm not going to be using the RRD graphing features. I know I can go back and generate this data outside of RRD, I just figured I would try to get RRD to do as much of the work as possible. What are your thoughts? - Casey
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