[rrd-users] A reason there isn't a CF SUM function?

Simon Hobson linux at thehobsons.co.uk
Tue Aug 21 17:55:32 CEST 2012

Derek Haynes wrote:

>For reason (1), the common argument is you can calculate this by
>multiplying the average by the duration of the CDP. However, this
>doesn't hold when a CDP contains unknowns as the average is only based
>on the known values.

And the same would apply if you had a SUM CF

>The TOTAL operator does exactly what I'm looking for but it's only for
>VDEF statements.

That makes sense. You will only get one value by summing a list of numbers.
Which leads on to ... what would you store for a SUM CF ?

Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

More information about the rrd-users mailing list