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Paper: Understanding and Building High Availability/Load Balanced Clusters

A superb explanation by Theo Schlossnagle of how to deploy a high availability load balanced system using mod backhand and Wackamole. The idea is you don't need to buy expensive redundant hardware load balancers, you can make use of the hosts you already have to the same effect. The discussion of using peer-based HA solutions versus a single front-end HA device is well worth the read. Another interesting perspective in the document is to view load balancing as a resource allocation problem. There's also a nice discussion of the negative of effect of keep-alives on performance.

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Reader Comments (3)

Theo's book, "Scalable Internet Architectures," is most excellent. He talks about this and many related items there as well. Anyone really interested in these types of topics should read this book in my opinion.


November 29, 1990 | Unregistered CommenterKent

Its really out of date. Doesn't work on current versions of Apache. Is there any point?

November 29, 1990 | Unregistered CommenterJustin

Great paper, EXCEPT, as Justin pointed out, it's WAY out of date. The last release of mod_backhand was in 2003. I feel somewhat like I've wasted my time reading this." title="Callum" target="_blank">Callum

November 29, 1990 | Unregistered Commenterchmac

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