[rrd-users] Re: Question

[Németh László]

rrdtool graph parameter:

"-S|--step value (default automatic)

By default rrdgraph calculates the width of one pixel in the time domain and tries to get data at that resolution from the RRD. With this switch you can override this behaviour. If you want rrdgraph to get data at 1 hour resolution from the RRD, then you can set the step to 3600 seconds. Note, that a step smaller than 1 pixel will be silently ignored."

So If you have a DS with step 1 minute and make an rra of 5 and and rra of 15 values then
--step 5*60  or --step 15*60 selects the first or the second RRA.

Laszlo

-----Original Message-----
From: Thomas Erskine [mailto:thomas.erskine at sympatico.ca]
Sent: Monday, April 07, 2003 11:29 PM
To: Bret Jordan; rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Re: Question


At 14:10 2003-04-07, 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).

You don't.  You request a graph for a specified time-span and rrdtool 
choses the best RRA which covers that time-span.

 >Thanks
 >Bret
 >
 >--
 >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 >Bret Jordan                       Dean's Office
 >Computer Administrator   College of Engineering
 >801.585.3765                 University of Utah
 >            jordan at coe.utah.edu
 >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 >
 >
 >--
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Thomas Erskine <thomas.erskine at sympatico.ca> +1.613.591.8490 


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