[rrd-users] Fetch with --resolution parameter

Leon Stringer leon.stringer at ntlworld.com
Thu May 22 11:46:05 CEST 2008

> From: Simon Hobson <linux at thehobsons.co.uk>
> Date: 2008/05/22 Thu AM 08:53:29 GMT
> To: rrd-users at lists.oetiker.ch
> Subject: Re: [rrd-users] Fetch with --resolution parameter
> Leon Stringer wrote:
> >And I query data with:
> >
> >   rrdtool fetch file.rrd MAX -r 86400 -s 1210766400 -e 1211371200
> >
> >Can anyone tell me what I'm doing wrong?
> your start and end times are 7 days apart, 7x4 is 28, include both 
> the start and end times and that makes 29. What you are doing wrong 
> is not understanding what the tool is doing.
> The resolution option merely tells fetch which existing RRA to use 
> (in this case you are trying to select a non-existent RRA), it does 
> NOT resample the data to some arbitrary step size.

Yes, I didn't understand. It's clearer now, thanks for the explanation.

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