[rrd-users] Re: How does rrdtool behave if I store 5-minute-values for one year?

[Serge Maandag]

rrdtool uses the values the rrd holds. For the given time frame you want
to graph, it will try to take the highest resolution data.

If you just store 5 minute samples, it will never even think of using a
2 hours average.
2 hours average samples can only be displayed if your rrd database has
an RRA that averages over 2 hours.

you always need 1 RRA (=consolidated data) in your database, even if it
just consolidates single samples.
See the tutorial on the rrdtool website for more info.

Serge.

-----Original Message-----
From: Stephan Harren [mailto:sh at abovenet.de] 
Sent: Thursday, January 30, 2003 12:57 PM
To: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] How does rrdtool behave if I store 5-minute-values
for one year?



Hi All,

what I'm asking myself is how does rrdtool behave, if I store
5-minute-values 
for one year and nothing else?
What if I graph a timeframe of 2 months? Probably it would pick one
pixel for 
every 2 hours. 

Will it use just the 2-hour-values and ignore the rest? 

Will it build the averages and maxes for that two-hour intervals
internally 
and graph them?

If yes, then do I really need consolidated data in my rrd?

Will it find the max by every five-minute-value or will it just take the

2-hour-values and ignore the values in between?

Best regards,

Stephan
-- 
Stephan Harren
Manager Site Operations
MFN-IS
-------------------------------
Phone +49 69 90554 153
Fax +49 69 90554 111
Cell +49 173 7011126

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