[rrd-users] Consolidation Factors and Steps

Gellatly, Laurie Laurie.Gellatly at vodafone.com.au
Mon Apr 30 01:43:28 MEST 2001

I'd like to make sure I have the correct understanding of 
Consolidation Factors and Steps.
>From the manual:
rrdtool create ... [--step|-s step] ... [ RRA: CF:xff:steps:rows]
Please note there is a "step" value and "steps" as well and I
talk about both below.

If I have an RRA that has a steps value of 1 then I believe that
this means that every point that is entered into the rrd should 
end up in this RRA. As another way of looking at this, if I 
enter 3 values over step/3 intervals with a CF of Average, 
then does this actually average the values being entered into 
the RRA? I'd assumed that the CF does not get considered
when "steps" was 1?

If my assumption is correct that "steps" = 1 means actual 
data points entered (time period adjusted if needed), then 
the CF is not relevant in this case. This leads me to 
believe that keeping more than 1 RRA with different CFs 
and all with steps=1 is a waste. A change to rrd_fetch 
would allow any CF with steps=1 to be returned if the 
interval requested was "acceptable".


Thanks			...Laurie :{)

This correspondence is for the named person's use only.  It may 
contain confidential or legally privileged information or both. 
No confidentiality or privilege is waived or lost by any 
mistransmission.  If you receive this correspondence in error, please
immediately delete it from your system and notify the sender.  You 
must not disclose, copy or rely on any part of this correspondence 
if you are not the intended recipient. 

Any views expressed in this message are those of the individual sender,
except where the sender expressly, and with authority, states them to
be the views of Vodafone.

This email has been checked for viruses.

Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe
Help        mailto:rrd-users-request at list.ee.ethz.ch?subject=help
Archive     http://www.ee.ethz.ch/~slist/rrd-users
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi

More information about the rrd-users mailing list