Apache HTTP Server 2.2

There are important differences between the Apache HTTP Server 2.2 and version 2.0 (version 2.0 shipped with Community Enterprise Linux 4 and earlier). This section reviews some of the features of Apache HTTP Server 2.2 and outlines important changes. If you are upgrading from version 1.3, you should also read the instructions on migrating from version 1.3 to version 2.0. For instructions on migrating a version 1.3 configuration file to the 2.0 format, refer to "Migrating Apache HTTP Server 1.3 Configuration Files to 2.0".

Features of Apache HTTP Server 2.2

Apache HTTP Server 2.2 features the following improvements over version 2.0 :

Improved caching modules (mod_cache, mod_disk_cache, mod_mem_cache).

A new structure for authentication and authorization support, replacing the authentication modules provided in previous versions.
Support for proxy load balancing (mod_proxy_balancer)
support for handling large files (namely, greater than 2GB) on 32-bit platforms

The following changes have been made to the default httpd configuration:

The mod_cern_meta and mod_asis modules are no longer loaded by default.

The mod_ext_filter module is now loaded by default.

If upgrading from a previous release of Community Enterprise Linux, the httpd configuration will need to be updated for httpd 2.2. For more information, refer to http://httpd.apache.org/docs/2.2/upgrading.html