Iptables gives admins the ability to set up clusters and distribute the load. But what about failover?

Klaus Knopper is the creator of Knoppix and co-founder of the LinuxTag expo. He currently works as a teacher, programmer, and consultant. If you have a configuration problem, or if you just want to learn more about how Linux works, send your questions to: klaus@linux-magazine. com

The OpenSSI framework rearranges processes for easy and transparent clustering.

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Clustering is when a group of two or more computers (sometimes called nodes) work together as one single system in order to provide high availability of services for users. When a failure occurs on one server in a cluster, resources are redirected and workload is redistributed to another networked server.

Clustering several servers makes both Linux web and database solutions many times more robust. The process is mostly undertaken by organisations that have mission-critical websites/applications and businesses that are very serious about their internet presence.

Sun Microsystems has released the first few components of Solaris Cluster Express 7/07 as Open Source.