[rrd-users] RRD Wishlist: Adding comments to RRD created graphs

[Tobias Oetiker]

Hi Rob,

I would suggest keeeping such information in a file called

${rrdbasename}.comments

then when you do your graph, you use ${rrdbasename}.rrd for the
graph and read the ${rrdbasename}.comments file to create
additional COMMENT: lines in the graph command.

cheers
tobi

Today Leif Neland wrote:

> Rob Newman wrote:
> > Hi RRD folks,
> >
> > I know this is probably going to garner a 'nope, can't do that
> > response', but I was wondering if the RRD developers (Tobi et al) had
> > considered the capability of users adding comments to RRD files along
> > the lines of timestamp:comment string that could be added in the
> > header of an RRD archive. These comments could then be plotted on the
> > graphical output when RRDtool graph is called.
> >
>  <comments>
>  <!-- 2007-06-01 02:46:40 PDT / epochtime --> <row><v>New
> instrument</v></row>
>  <!-- 2007-05-01 02:46:40 PDT / epochtime --> <row><v>Mass
> recenter</v></row>
>  </comments>
>
> One reason to turn this down is that rrd-files always have the same size,
> the "slots" for data are allocated when the rrd is created.
> Adding comments would break this. Unless you allocated slots for x messages
> of y chars at creation.
>
> Leif
>
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-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902