[rrd-users] Re: Fw: Re: Question

[Holger.VanKoll at swisscom.com]

you use one rra for one combination of timeslice/precision

f.e. if you read a counter 6 times an hour you can use one rra with 1
step and 6 rows --> you can graph one hour, every value goes to the
graph
if you take 60 rows you can graph 10 hours

but if you want to graph one year, you dont use 6*24*365 samples. too
much diskspace, too much work to graph
instead, take another rra with f.e. 365 samples and step 6*24
rrdtool will "CF" (average f.e.) your data of one day -> less diskspace
and less work when graphing
that also less precision, but as most graphs have 200-800 pixels you
loose this precision when graphing out of 6*24*365 samples, too



-----Original Message-----
From: Jeff Rodriguez [mailto:jeff at unixisgod.com] 
Sent: Monday, April 07, 2003 10:44 PM
To: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Fw: Re: Question


So judging from your scripts, it seems you cannot graph multiple
DIFFERENT sources from an RRD with: ONE Data Source and one or many RRAs

So this is still something I don't understand (been playing with RRDTOOL
for a week) Why would you have multiple RRAs?

Jeff

----- Original Message -----
From: "Hugo van der Kooij" <hvdkooij at vanderkooij.org>
To: <rrd-users at list.ee.ethz.ch>
Sent: Monday, April 07, 2003 11:39
Subject: [rrd-users] Re: Question


> On Mon, 7 Apr 2003, Bret Jordan wrote:
>
> > I have gone through the Tutorial (which was well written by the way)

> > and through the manual, but I am still confused about one point...
> >
> > When you make an RRD and setup the various RRAs, how do you graph 
> > the individual RRAs?  (Thinking in terms of MRTG with the daily, 
> > weekly, monthly, and yearly graphs).
>
> I am working my way through the learining curve and am making some 
> snapshots of my current scripts available on: 
> http://hvdkooij.xs4all.nl/stats/
>
> The resulting graphs are on http://hvdkooij.xs4all.nl/stats-dag.cms
>
> Hugo.
>
> PS: Have mercy on my humble 128 kb/s uplink ;-)
>
> --
>  All email sent to me is bound to the rules described on my homepage.
>     hvdkooij at vanderkooij.org http://hvdkooij.xs4all.nl/
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