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List:       rrd-users
Subject:    Re: [rrd-users] ERROR: malformed trend arguments
From:       Casey McGinty <casey.mcginty () gmail ! com>
Date:       2011-09-20 6:53:56
Message-ID: CANp5jv6m=227ysQb10F2+VfBSNtBcTXBde=xnj78VsC+o35L_Q () mail ! gmail ! com
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On Mon, Sep 19, 2011 at 8:18 PM, Tobias Oetiker <tobi@oetiker.ch> 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

[Attachment #5 (text/html)]

On Mon, Sep 19, 2011 at 8:18 PM, Tobias Oetiker <span dir="ltr">&lt;<a \
href="mailto:tobi@oetiker.ch" target="_blank">tobi@oetiker.ch</a>&gt;</span> \
wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 \
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


&gt; Can someone explain what is happening in this example? I would like \
to<br><div><div> &gt; compute a trend along with my data.<br>
&gt;<br>
&gt; $ rrdtool create temp.rrd --step 1 DS:temp:GAUGE:30:0:U<br>
&gt; DS:trend:COMPUTE:temp,10,TRENDNAN RRA:AVERAGE:0.5:1:10<br>
&gt; $ rrdtool update temp.rrd N:3<br>
&gt; ERROR: temp.rrd: malformed trend arguments<br>
<br>
</div></div><br>this might be stretching the COMPUTE data source type a bit ...<br>
normally TREND(NAN) is used in CDEF arements of rrd graph. any<br>
particular reason you wand to compute this ahead of presentation?<font \
color="#888888"><br> </font></blockquote></div><br>Tobi, I was just experimenting \
with this feature. Right now I&#39;m using  RRDTool as a backend database for a web \
service. I&#39;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?<br>
<br>
- Casey<br>



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