[rrd-users] Re: DS Choice

[Fruitman, Corey]

My guess is that your spike is dwarfing all of your legitimate usage to the point that can't see it on the graph.  The data's probably there, but because of the scale of your graph, it isn't visible.

Do an rrd fetch from the command line to see if your data is in the RRD.  If it's there (I suspect that it is), then you've found the problem.  Replace that spike with NaN (RRDTool assumed that your counter rolled over instead of resetting) and your graphs will go back to normal.

Corey.


-----Original Message-----
From: rrd-users-bounce at list.ee.ethz.ch
[mailto:rrd-users-bounce at list.ee.ethz.ch]On Behalf Of paul at oninit.com
Sent: December 2, 2003 11:50 AM
To: Alex van den Bogaerdt
Cc: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Re: DS Choice


Having run 6 weeks now the graphs are perfect:-))  I've reset the 
counter (as can happen for real). Now I have no graphs, just
flat lines, with a single spike when the counter was reset. So the 
resetting of the counter appears to have 'wiped out' 6 weeks of 
history.

using rrdtool info on the rrd and looking at the time the counter
was reset I can't see a spike in the data, the value is 50(ish)
on each increment.

I must be missing something but I can't see what it is!!!!

Alex van den Bogaerdt wrote:
> 
> On Thu, Oct 23, 2003 at 09:52:47AM +0100, paul at oninit.com wrote:
> > I have a data source that steadily increases and I've been using
> > a DS of COUNTER and I get a nice spiky line - just what I'm after.
> 
> good.
> 
> > However, if for some reason the data counter is reset I loose
> > all the history data and start a 'new' spiky line.  The resetting
> > would typically only happen once/twice per year but the counter
> > will probably wrap the 2G every few months.
> 
> What program is deleting your history?  Surely this isn't rrdtool.
> 
> > Am I using the correct DS?
> 
> >From what I read here, it is.  The worst thing that can happen is
> that rrdtool detects a ___HUGE___ spike.  This is why setting min
> and max (during rrdtool create) is a good idea.
> 
> Alex
> 
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