[rrd-developers] Re: SUM Consolidation Function in RRDTool

[Stanislav Sinyagin]

Mark, if I'd need precise figures, I'd store the data in an SQL database. 
RRDtool is nice when it's used what it's designed for.

For performance analysis, you most often need averages and peak values, 
and that's what RRDtool delivers you very well. 

For such things as billing, it's just an overkill trying to avoid the 
aggregation in RRDtool.

Stan




--- Mark Lawrence <nomad at null.net> wrote:
> So for example if I am wanting to accurately calculate the number of mails
> delivered to my domain I am forced to:
> 
>   * ensure the RRD begins on the largest RRA boundary
>   * fill the RRD with zeros from the previous RRA boundary to the first
>     measurement epoch
>   * make sure that whenever no mails were delivered I update with 'zero'
>   * If my monitoring box or mailserver go down for some reason, I then
>     also have to 'fill' the un-measured time with zeros as well.
> 
> The processing required with multiple data sources over hundreds of mail
> domains is not trivial, and can lead to delays when doing updates.

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