[rrd-developers] DS idea

Alex van den Bogaerdt alex at vandenbogaerdt.nl
Sun Oct 10 19:31:08 CEST 2010

> However, part of the collected samples are maximum wait times of queueing
> systems. These numbers are not guesswork but calculated exactly while
> servicing. I am very much interested in seeing the maxima of these maximum
> wait times later when I query a MAX-RRA. Currently, RRD interpolates to
> the grid first and than computes the maximum.
> I know I could set the step size to 1 second and no interpolation would
> happen. This looks ugly to me, as I sample by the minute and would have to
> set very high XFFs.

No you don't.  You need a high heartbeat, and there's nothing wrong with
You don't even have to have an RRA with steps==1.  You can have the smallest
RRA be with each CDP being 60 PDPs and each PDP == 1 second.

> Why do I post this on the developer list?

Because you think you understand the program. May I politely suggest that we
move the discussion, if any, to the users list?

More information about the rrd-developers mailing list