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Rrdtutorial

DESCRIPTION

RRDtool is written by Tobias Oetiker with contributions from many people all around the world. This document is written by Alex van den Bogaerdt

RRDtool was developed by Tobias Oetike, with contributions from people all over the world. This document was written by Alex van den Bogaerdt.

The documentation provided with RRDtool can be too technical for some people. This tutorial is here to help you understand the bases of RRDtool. It should prepare you to read the documentation youself. It also explains the general things about statistc with a focus on netwoking.

The documentation provided by RRDtool may be too professional for most people, and the tutorial here helps you understand the basics of RRDtool. It prepares you to read documentation yourself in the future. It also explains some basic things about the convenience of network statistics.

TUTORIAL

Import

Please don't skip ahead in this document! The first part of this document explains the basics and may be boring. But if you don't understand the basics, the examples will not be as meaningful to you!

Please don't skip the previous part of the article, which introduces the basics that may be boring, but if you don't understand the basics, you won't understand the following examples.

Sometimes things change. This example used to provie numbers like 0.04 "in stead of" 4.00000e-02 ". Those are really the same numbers, just written down differently. Don't be alarmed if a future version of rrdtool display a slightly different form of output. The example in this document are correct for version 1.2.0 of RRDtool.

Sometimes things change. For example, "0.004" will be replaced by "4.00000e-02". These are actually the same numbers, just in different ways. Don't be alarmed if the output of a future version of rrdtool is slightly adjusted. The examples in this document are suitable for version 1.2.0.

Also,sometimes bugs do occur. They may also influence the outcome of the examples. Example speed4.png was suffering from this (the handing unknown data in an if-statement was wrong). Normal data will be just fine (a bug in rrdtool wouldn't last long) but special cases like NaN,INF and so on may last a bit longer.Try anotherversion if you can, or just live with it.

Of course, bugs will also appear, which may affect the final output, such as figure speed4.png, which is affected by bug, and all the data is normal, which is gratifying, but special data such as NaN,INF may appear in later data. If you have the ability, you can change it, otherwise leave him alone for the time being.

I fixed the speed4.png example. There may be other examples which suffer from the same or a similar bug. Try to fix it yourself,which is a great excercise. But please do not submit your result as a fix to the source of this document. Discuss it on the user's list, or write to me.

I fixed this example speed4.png. There may be other examples that will be affected by the same or similar bug, try to fix it, this will be a very big challenge, but do not submit to the document, you can write to me

What is RRDtool?

What data can be put into an RRD?

What can I do with this tool?

What if I still have problems after reading this document?

How will you help me?

Your first Round Robin Database

What has been created?

Time to create some graphics

Graphics with some math

Graphics Magic

Updates in Reality

Some words on SNMP

A Real World Example

Consolidation Functions

Let's review what you now should know

Data Source Types

RRDtool under the microscope

Counter Wraps

Data Resampling

WRAPUP

MAILINGLIST

SEE ALSO

AUTHOR

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