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Hello Steve,<br>
<br>
The version I am using was 1.4.7 on ubuntu precise. I've now
compiled the latest stable (1.4.8) but there are no differences
between them. Also I've played around with the order of the commands
(putting all the graph rendering in front/behind etc), but that also
does not make a difference. <br>
<br>
Regards,<br>
Marius Karthaus<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 06-09-14 01:54, Steve Shipway wrote:<br>
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<div style="direction: ltr;font-family: Tahoma;color:
#000000;font-size: 10pt;">Looking at the two graphs, they cover
the same data width but the second is 2x the pixel width, and so
has less on-the-fly consolidation before graphing. From this,
as I would expect, the peaks in the first graph are averaged out
more, and so show up as lower (around 50M).The second graph
shows the peaks narrower but higher (around 70M) due to their
having less averaging applied. So far, so good and as expected.<br>
<br>
However, the percentile calculation (as I understand RRDTool's
data handling) should not be affected by the graph-time
consolidation, and should apply to the extracted data set, which
we have forced to the same resolution in both graphs. However,
the lower value printed would seem to indicate that this is not
the case, and the graph consolidation is taking place /before/
VDEF calculation. This only shows up because the data are
extremely spiky in pattern and have a fair amount of
consolidation being applied. If this is the case it would seem
to be contrary to the behaviour implied by the documentation
(that sounds like a long way of saying "i think its a bug' :)<br>
<br>
I don't believe that you have told us which version of RRDtool
you are using? If you're not on a recent version, it might be
worth trying an upgrade., just in case this is related to a
recently-fixed bug.<br>
<br>
Steve<br>
<div><br>
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px"><strong>Steve
Shipway</strong></div>
<div style="font-family:Tahoma; font-size:13px">University
of Auckland ITS</div>
<div style="font-family:Tahoma; font-size:13px"><em>UNIX
Systems Design Lead</em></div>
<div style="font-family:Tahoma; font-size:13px"><a
moz-do-not-send="true"
href="mailto:s.shipway@auckland.ac.nz">s.shipway@auckland.ac.nz</a></div>
<div style="font-family:Tahoma; font-size:13px">Ph: +64 9
373 7599 ext 86487</div>
<div style="font-family:Tahoma; font-size:13px"><em></em><br>
</div>
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