Latest Articles

Creating and Modifying Filters in Moodle 1.9

by Jonathan Moore Michael Churchward | May 2010 | Moodle

In this article by Jonathan Moore and Michael Churchward, authors of Moodle 1.9 Extension Development, we will discuss the basic concepts of creating a Moodle filter, which includes:

  • How a filter works
  • Using the API to create filter code
  • How to use language files
  • How to create configuration settings
Read Creating and Modifying Filters in Moodle 1.9 in full

Compiling and Running Handbrake in Ubuntu

by Delan Azabani | May 2010 | Linux Servers Open Source Web Graphics & Video

Handbrake is considered the Swiss Army knife of video conversion tools. Running on the three major operating system platforms, Handbrake can open a huge variety of formats, including common ones that others can't handle (like the titles in the MPEG TS structure of a DVD). Handbrake outputs to a small selection of efficient formats, including H.264/MPEG-4 AVC, MPEG-4 ASP and Theora video. It has advanced features including chapter marking, subtitle inclusion and audio selection, plus filters for optimising video. On Linux, Handbrake can make use of the libdvdcss2 library to decrypt CSS-protected DVDs in-place during encoding, saving the need to use DVD Decrypter or another tool, usually through Wine. This article by Delan Azabani will guide you through the process for building Handbrake, installing it and converting video with it.

Read Compiling and Running Handbrake in Ubuntu in full

SOA: Implementing Service-Oriented Orchestrations

by Yuli Vasiliev | May 2010 | .NET BPEL Microsoft SOA Web Services

This article by Yuli Vasiliev, author of the book SOA and WS-BPEL, dicusses how to implement service-oriented orchestrations using WS-BPEL.

Read SOA: Implementing Service-Oriented Orchestrations in full

Setting up MySQL Replication for High Availability

by Alex Davies | May 2010 | Cookbooks MySQL Open Source Web Development

MySQL Replication is a feature of the MySQL server that allows you to replicate data from one MySQL database server (called the master) to one or more MySQL database servers (slaves). MySQL Replication has been supported in MySQL for a very long time and is an extremely flexible and powerful technology. Depending on the configuration, you can replicate all databases, selected databases, or even selected tables within a database.

In this article, by Alex Davies, author of High Availability MySQL Cookbook, we will cover:

  • Designing a replication setup
  • Configuring a replication master
  • Configuring a replication slave without synchronizing data
  • Configuring a replication slave and migrating data with a simple SQL dump
  • Using LVM to reduce downtime on master when bringing a slave online
  • Replication safety tricks

Installing and Managing Multi Master Replication Manager(MMM) for MySQL High Availability is covered seperately.

Read Setting up MySQL Replication for High Availability in full

Installing and Managing Multi Master Replication Manager(MMM) for MySQL High Availability

by Alex Davies | May 2010 | Cookbooks MySQL Open Source Web Development

Multi Master Replication Manager for MySQL ("MMM") is a set of open source Perl scripts designed to automate the process of creating and automatically managing the "Active / Passive Master" high availability replication setup discussed earlier in the article on MySQL Replication design recipe, which uses two MySQL servers configured as masters with only one of the masters accepting write queries at any point in time. This provides redundancy without any significant performance cost.

In this article, by Alex Davies, author of High Availability MySQL Cookbook, we will cover:

  • Multi Master Replication Manager (MMM)
    • Initial installation
    • Installing the MySQL nodes
    • Installing the monitoring node
  • Managing and using Multi Master Replication Manager (MMM)
Read Installing and Managing Multi Master Replication Manager(MMM) for MySQL High Availability in full
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