custom RRDs

[Magistrator]

I wonder if it isn’t more practical to create new RRDs based
on the result of arithmetic operations over other existing RRDs.
This approach would simplify the graphic making process a lot. And
would relocate each processes, of “graphic making” and
“data treatment”, to different areas.

I work my ass out to create nice data summations of interfaces
and network traffic between other things. With the above approach it would be much easier.


Cheers!

[TheWitness]

Judgeman,

You realy need to be more specific. I am totally confused.

TheWitness

[Magistrator]

Each set of data collected is stored on an RRD file. It’s from these RRD files that we create graphs. Each graph is based on a set of various RRDs, we can even apply CDFs and staking functionalities to achieve determined graphic results.

My proposal is to create a way where we can create a new RRD file based not on some equipment ordinary data query, but based on the result of arithmetic operations on other RRDs.

So for example, imagine you want to know the total flux of data that enters a specific sub-network. I want to create a special RRD file that is the result of the sum and subtraction of specific gateway interfaces already existent RRDs. Then I would simply have to graph ONE RRD.

Right now as it is, Cacti makes this process a hard one, cause it makes me handle all the RRDs I need, at once, while creating the graph make-up.

This type of example is of course painful for large networks like mine where I have 84 equipments to monitor. So dividing the process in two step would make things a lot easier.
1º - Create a new RRD based on data treatment of other existent RRDs.
2º - Graph the single RRD data with a single simple graph template, (no staking or CDFs)


Please did I make myself clear?
Cheers