[rrd-users] Dynamic Steps

[Alex van den Bogaerdt]

----- Original Message ----- 
From: "Alan Finlay" <alan.websites2 at chankly.com>
To: "'Alex van den Bogaerdt'" <alex at vandenbogaerdt.nl>; 
<rrd-users at lists.oetiker.ch>
Sent: Thursday, April 18, 2013 1:41 PM
Subject: RE: [rrd-users] Dynamic Steps


> Hi Alex,
>
> Isn't this the same as the case I documented recently for my Geiger 
> counter
> where I have a step size of 1 minute and update an ABSOLUTE counter every 
> 5
> minutes.  See below I am updating every 5 seconds with integral values
> "returned count=x".  In the minute from 1365867005 to 1365867060, I did
> update 0+0+3+2+1+1+2+1+5+2+2+3=22 with result 0.36438774029 which I don't
> understand at all.

Don't forget the interval between 1365867000 and 1365867005 which is also 
part of this minute. It's the minute from 1365867000 to 1365867060.  22 
ticks in 60 seconds should result in 0.3666...   0.36438774029  is not 
correct but it is close. I suspect there are rounding errors involved.

Tobi, could you shed some light on this?