[rrd-users] Re: Question on RRA and number of rows

[Hwee Khoon, Neo]

Oh 1 more question, by using "RRA:AVERAGE:0.5:1:10000" with a step = 1, this
is as good as storing raw data. So why would anyone want to specify another
RRA like "RRA:AVERAGE:0.5:288:797" or "RRA:MAX:0.5:288:797"?

Thanks!

-----Original Message-----
From: rrd-users-bounce at list.ee.ethz.ch
[mailto:rrd-users-bounce at list.ee.ethz.ch]On Behalf Of Hwee Khoon, Neo
Sent: Thursday, January 27, 2005 3:15 PM
To: Rrd-Users
Subject: [rrd-users] Question on RRA and number of rows


Hi RRD users,

will there be any performance impact if the number of specified "rows" is
set very high?

e.g.

rrdtool create default.rrd
--step 300
DS:ioct:GAUGE:600:0:U
DS:ooct:GAUGE:600:0:U
RRA:AVERAGE:0.5:1:10000 <-this value

I would like to have a history of at least 2 months and am contemplating
using:

RRA:AVERAGE:0.5:288:797

is the downside of using this only affects the accuracy of the result?

Thanks!

Rgds,
HK



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