[rrd-developers] DS idea

Steve Shipway s.shipway at auckland.ac.nz
Mon Oct 11 02:05:26 CEST 2010

> >
> > Whatever it's called, I'd certainly like to see a DS type which is
> like
> > GAUGE but without the normalisation to the interval.  There are many
> > applications for which this would be useful.
> >
> I'm probably missing something here.
> What can you do with that, which cannot be achieved with step==1,
> steps=={whatever},heartbeat>={whatever} and CF LAST (or, as in this
> thread, MAX) ?

If this new type is created, then you don't need to create an RRA with a step of 1, it will work however long the step interval is. 

This means that all the standard RRA definitions you're using (many people have a step of 5min) will work without change.  In particular, MRTG will be able to use this new data type with minimal alteration, as will other software that uses the RRD API.

While you can manage to approximate this by special configurations of DS and xff setting in the RRA, it is much simpler if you can simply set a data type.  I think this would be a good feature to support directly, rather than via more complex settings...


Steve Shipway
ITS Unix Services Design Lead
University of Auckland, New Zealand
Floor 1, 58 Symonds Street, Auckland
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