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inverted CERN School of Computing 2010 8-9-March 2010, CERN

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Advanced tools for system data collection

Lecturers:
Luis Muñoz Mejías
- CERN
Malte Nuhn - Aachen University - Germany

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Series: Advanced Tools for system data collection:

Lecture: Logs in software: How to record the what, the when and the who

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Tuesday 9 March

10:30 - 11:25

Lecture 7

Logs in software:
How to record the what, the when and the who

Luis Muñoz Mejías

Description

In this part we'll highlight the relevance of having good quality logs that are easy to understand by both humans and machines. We'll describe the properties good logs must have (relevant contents, unambiguous timestamping, easy classification, integrity...), and the existing tools designed to meet these requirements, with examples for both developers (what and how to log) and system administrators (what to do with those logs). Real-world examples of good and bad practices will be shown, together with some ideas for improvement.

 

Audience
Software developers and, perhaps, system administrators.

 

Pre-requisite

Understanding of UNIX systems. Programming experience with C/C++/Perl/Python/Java will help.

 

Series: Advanced tools for system data collection:

Lecture: Systemtap - Tapping the Linux Kernel to Find out What Your Machine is Really Doing

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Tuesday 9 March

11:35 - 12:25

Lecture 8

Systemtap - Tapping the Linux Kernel to Find out What Your Machine is Really Doing

Malte Nuhn

Description

This lecture introduces Systemtap, a free software (GPL) infrastructure to simplify the gathering of information about the running Linux system.

The lecture's first part points out in which situations administrators and developers are often lacking information when diagnosing performance or functional problems.

A short overview about the Linux Kernel is given, enabling the listener to get a feeling, which information is accessible and might be interesting in his specific use-case.

Next, a brief overview of Systemtap's inner workings is given.  Therefore, common probing techniques, their prerequisites, possible risks and downsides are presented. This part ends by showing how these techniques are accessible in Systemtap and what is needed to get them to run.

The lecture's last part introduces Systemtap's scripting language. It explains a couple of commonly used scripts and shows how the listener can practically introduce them to his own logging and monitoring environment.

 

Audience
This lecture targets developers and administrators who are running/ developing software on Linux servers. This lecture will introduce a powerful toolchain, allowing the listener to finally get a grip on his Linux server.

 

Pre-requisite

To draw maximum benefits of the lecture, the attendant should preferably have some experience in Linux System administration and/or programming. This lecture can be reasonably followed without having attended the first lecture of this series.

 

 

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