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

[Andrew Werbowy]

does this make any sense? 
Daily (5 Minute Average)       steps -1  rows- 229536
Weekly (30 Minute Average) steps - 6 rows- 38256 
Monthly (2 Hour Average)       steps- 24 rows - 9564 
Yearly (1 Day Average)            steps- 288 rows - 797 

Regards,
Andrew

>>> Stephan Harren 02/04/03 03:33AM >>> 

But if you graph for one year of data, this will be 105120 values on 600 
pixels. What kind of values will rrdtool graph with? I tried, and from my 
experience, the MAX graph is higher if you keep an rra for the MAX values 
than the MAX graph if you don't. I guess this happens because rrd (maybe, 
just guessing) averages the 5-min values to appropriate information fitting 
into the pixel parameters. But anyway, graphs ! are ! different if you don't 
keep the max or keep the max data. 

Anyone tell me if I'm wrong. 

Best regards, 

Stephan 

Am Dienstag, 4. Februar 2003 08:32 schrieb Ketil Oftedahl: 
> Andrew, 
> 
> 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 
> RRA. 
> 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. 
> 
> Rgds, 
> Ketil 
> 
> Andrew Werbowy wrote: 
> > So should I use MAX or not? 

-- 
Stephan Harren 
Manager Site Operations 
MFN-IS 
------------------------------- 
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Fax +49 69 90554 111 
Cell +49 173 7011126 

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