IBM has published the following new technical articles, tutorials, and downloads on its DeveloperWorks and AlphaWorks websites. They cover a range of interesting (though not necessarily embedded) technical topics, primarily related to Linux and open source system development. Some require free registration.

• Learn how UNIX multitasks — On UNIX systems, each system and end-user task is contained within a process. Learn how to control processes and use a number of commands to peer into your system.
• Measure Time in Linux with Time Base — Use the PA technology's Time Base register to measure time at the nanosecond level in Linux on PowerPC and Cell BE microprocessors. Applications where this is useful include timestamping transactions (typically encrypted or digitally signed single-use messages), profiling code, and implementing small, precise software delays.
• Master the LAMP Architecture — Applications using the LAMP architecture, such as Linux, Apache, MySQL, and PHP/Perl, are constantly being developed and deployed. This first article in a series of three covers the LAMP architecture, some measurement techniques, and some basic Linux kernel, disk, and file system tweaks. This series of three articles discusses many of the server configuration items that can make or break an application's performance.
• Install Multiple Linux Servers with NFS — Learn how to install multiple Linux servers at the same time using network-based installation. In this second article of two parts on installing Linux server software, understand how to configure and install using Network File Share (NFS) on System x with Red Hat Enterprise Linux Version 4.
• ActionScript 3.0 and Mozilla's Tamarin — ActionScript 3.0 is a powerful object-oriented programming language that signifies an important step in the evolution of the Flash Player Runtime. The motivation behind ActionScript 3.0 was to create a language ideally suited for rapidly building rich Internet applications. Learn how to Script Adobe movies and applications with the next-generation Flash Player Runtime and Mozilla's Tamarin open source project.
• Effective software testing — Learn how to use best practices and tools to keep your testing teams aligned with business priorities.
• Sizing Massively multiplayer online games — MMOGs (Massively multiplayer online games) are arguably one of the most complex technical endeavors that developers can currently undertake. Each instance of each game is a complex simulation made up of millions of lines of code and billions of graphical elements, all executed on huge clusters of the latest computer, storage, and networking equipment. Learn a performance-based approach to sizing infrastructure and successfully solve one of the most risky and costly pieces of the MMOG puzzle.
• Simplify Ajax development with jQuery — Are you tired of the boring repetition involved with DOM scripting and Ajax, then take a look at jQuery. jQuery is a JavaScript library that helps simplify your JavaScript and Ajax programming. Unlike similar JavaScript libraries, jQuery has a unique philosophy that allows you to express common complex code succinctly. Learn how to extend jQuery with plug-ins.
• Faster XML reads and writes with XPath — If you're even an occasional XML programmer, and you don't yet use XPath, you have an opportunity to multiply the performance and maintainability of your applications. This article details a few specific examples that demonstrate what a difference query methods can make in even simple XML processing.
• Deploy Apache Pluto Portal on Geronimo — This article takes you step by step through deployment of the Apache Pluto driver and container in Geronimo to give you a 100% open source environment for your portal applications. Then learn how to develop, deploy, and test a sample portal application in Pluto and Geronimo.

 
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