[rrd-users] Re: Storimg 5 min data for 2 yr

Ketil Oftedahl ketil at oftedahl.no
Tue Feb 4 08:32:04 MET 2003


I think you can get by by using only ONE RRA.  If you sample tha data at
5 minute intervals and store every sample for the 2 year period there
will be no need to store additional average/max values.

>            RRA:AVERAGE:0.5:1:210240     \
This will be the "raw" storage of all samples for 17520 hours (730 days)

>            RRA:AVERAGE:0.5:6:700      \
This will give you 30 minute averages for 350 hours

>            RRA:AVERAGE:0.5:24:775     \
...and 2 hour averages for 1550 hours

>            RRA:AVERAGE:0.5:288:797    \
...and 24 hour averages for 19128 hours (797 days)

Only this last one will cover a longer period than the raw 5-minute step
If you increase the 5-minute step RRA to cover 797 days (if that's what
you need) you will only need that ONE RRA.

If you store every sample for the required period you will be able to
create both AVERAGE and MAX graphs for any period up to the total RRA
storage period with any resolution up to the sample/storage interval.
(Although a 2-year graph with 5-minute step size will be rather wide

Creating MAX or MIN RRAs will only be required when you are using the
consolidation functionality to store data lass often than the sample
interval but still want to keep the MAX/MIN values.


Andrew Werbowy wrote:
> So should I use MAX or not?

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