[rrd-users] Re: Beginner question regarding RRA's

[Alex van den Bogaerdt]

Rainer Bawidamann wrote:
> 
> In article <20010107150517.A20760 at visi.com>,
> 	sdk at shell.yuck.net (Stephen) writes:
> > 
> > After reading the docs there's one thing that confuses me: the RRA
> > consolidate functions and steps specification. Some of the examples I
> > see have only a '1' for the number of steps. So for example, the RRD
> > that approximates MRTG:
> [..]
> > # RRA:AVERAGE:0.5:1:600
> > # RRA:MAX:0.5:1:600
> [..]
> > What's the difference between the first AVERAGE and MAX definitions?  
> 
> I think there is no real difference. The people writing the code to
> create RRDs for MRTG didn't think about this aspect (I^Wthey weren't
> aware that this RRA is obsolete). Me thinks that you're intelligent
> enough to write a CGI for MRTG ... ;-}

IMHO there is one big difference: if you write scripts to process the
data, you need not provide a special case for average vs. max.

In other words: a little bit of extra disk space and hardly any more
processing power results in more easy programming.  This may or may not
result in fewer bugs.

Personally I think it is worth it.

cheers,
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