Caudium

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For the ancient city called Caudium, see Montesarchio

Caudium is an open source web server. It was originally written as a fork of the Roxen Challenger server. The server is written in C and the Pike, and Pike is also used to create extensions to the server, although Caudium also supports PHP.

Caudium is in many ways similar to Apache, and one of its selling points is that it is considered very easy to migrate back and forth between the two servers. This said, the configuration process is different, the directory structure is different, and generally the languages used to program server extensions or dynamic pages are different, although both support PHP. Caudium offers a different performance profile than Apache, because it doesn't fork external processes, making it better suited to cope with sudden spikes of traffic (according to the Caudium website).