[rrd-developers] FW: Rrdtool thoughts

[Michael T. Babcock]

Hello all ... I was just having a quick E-mail discussion with Tobias
w.r.t. changing how graphing is done and he suggested that I subscribe
to the list for discussion.  Here's some of what transpired to get any
reactions you might have:

> From: Tobias Oetiker
> 
> > From: Michael T. Babcock
> >
> > > From: Tobias Oetiker
> > >
> > > this has been discussed on the mailinglist, and reactions were 
> > > favorable ... only that there is nobody willing to code this ... 
> > > also such a change would require some additional layer which 
> > > emulated the old commandline on the new interface ...
> >
> > ... Unless the graphing base interface were changed and the old CLI 
> > were the emulated layer :).
> 
> well with the xml representation you would actually have more 
> freedom of expression so I gues it would be sensible to have 
> this a s a base

... And in a prior E-mail, Michael wrote ...

> Something resembling an XML or simple text representation of what
should
> be collected/graphed, etc. would be much more useful.
>
> A humble suggestion for XML graphing:
>
> <graph>
>  <rrd src="/var/rrd/eth0.rrd" />
>  <chart type="line" color="blue" size=2>
>   <data src="bytesin" />
>   <label pos="auto">Bytes In</label>
>  </chart>
>  <chart type="line" color="red" size=2>
>   <data src="bytesout" />
>   <label pos="auto">Bytes Out</label>
>  </chart>
>  <calc type="rpn" name="bytestotal">bytesin,bytesout,+</calc>
>  <label pos="auto">Bytes Total: <value src="bytestotal" /></label>
> </graph>
>
> [...]
>
> Now I realise that this could be done externally, but a separate
> graphing library/tool that used an external file to generate the image
> data seems most efficient to me.
-- 
Michael T. Babcock
CTO, FibreSpeed Ltd.
http://www.fibrespeed.net/~mbabcock/

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