Hadoop + Amazon EC2 - Using Apache Whirr

Apache Whirr is a set of libraries for running cloud services. You can use it to create EC2 instances running Hadoop, just like the previous tutorial. But, Whirr also provides a lot of other interesting functionality that worth to give a try. Other advantage is the possibility to run into…

Tutorial - Deploying Hadoop at Amazon EC2

There is an old tutorial placed at Hadoop's wiki page: http://wiki.apache.org/hadoop/AmazonEC2, but recently I had to follow this tutorial and I noticed that it doesn't cover some new Amazon functionality.To follow this tutorial is recommended that you are already familiar with the basics of…

Audio player toy using Gstreamer

In order to learn more about some other Open Source projects and different development environments, I started to read about Gstreamer. The idea was to implement a very simple player, where the medias that will be played are passed by argument in the command line. The main pipeline has only…

OurGrid - Bug 871

This bug was consequence of a strange behavior of Openfire XMPP Server. Some s2s messages were arriving out of order. We struggled through different approaches and ideas until find out "the truth", here is the complete history: A new Peer wanted to join OurGrid's community, in this way, it joined…

Cheese - Bug 647229

My first experience of contribution to Cheese was a patch that intend to fix the bug: https://bugzilla.gnome.org/show_bug.cgi?id=647229 The first thing that I noticed was that this bug happens only when the user closes the Preferences dialog with the escape key... But, why?…