[rrd-users] Re: [Q] calculating the size of an RRD file

Alex van den Bogaerdt alex at ergens.op.het.net
Wed Dec 18 00:39:12 MET 2002

On Tue, Dec 17, 2002 at 05:28:22PM +0100, Christophe Roudet wrote:
> Is there a formula to calculate the size of a RRD file in function of number
> of samples, number of RRAs and number of DSs.

Do it yourself.

1) Make a copy of a database.
2) Increase (or decrease) the amount of rows in an RRA.
3) Compare the size of the copy with that of the original.

Each row in an RRA contains all DSes.  This means the change in size
should be <number of DSes> times <bytes per entry>.

Get the current number of DSes and RRAs from "rrdtool info".

Much of what looks like rudeness in hacker circles is not intended to give
offence. Rather, it's the product of the direct, cut-through-the-bullshit
communications style that is natural to people who are more concerned about
solving problems than making others feel warm and fuzzy.


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