[rrd-users] Re: Using absolute numbers

[Alex van den Bogaerdt]

Brian Ipsen wrote:

>  I consider using rrd to gather information about new articles on a NNTP
> server in different groups. But if I store values as absolute values (not
> the difference between 2 measurements), is it then possible to graph the
> differences in the measurements ?? Eg.

I currently do not know of a way to achieve this.  If you get a
suggestion off the list, please let me know.

> 1st measurement: 23102
> 2nd measurement: 23263
> 3rd measurement: 23421
> 4th measurement: 23643
> 
> The value displayed should then be:
> 
> 0 - 161 - 158 - 222
> 
> Possible ? Or do I have to store the last-measured values myself to
> calculate the difference and then store the calculated value in the database
> ?

I assume you have a reason to store the numbers as they are.  Why not
store them twice, once in a COUNTER and once in a GAUGE ?

cheers,
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