Serve static content faster with Fast Response Cache Accelerator

 

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The fast response cache accelerator (FRCA) can improve the performance of the IBM HTTP Server when serving static content, such as text and image files. Support for FRCA is on AIX and Windows systems only.

 

Overview

When FRCA is enabled, the default configuration setting allows all static files to be cached. The cache automatically loads during server operation so that individual files do not need to be listed. Use the AfpaCache directive to turn caching on or off for specific directories.

FRCA will remove files from the cache when they change to avoid serving stale content.

 

Procedure

• To enable FRCA, edit the httpd.conf configuration file and delete the comment character (#) from the beginning of the LoadModule directive as follows:

      #LoadModule ibm_afpa_module modules/mod_afpa_cache.so
  
  

  becomes

      LoadModule ibm_afpa_module modules/mod_afpa_cache.so
  
  

• Enable IBM HTTP Server for dynamic page caching. You can use FRCA with WAS to cache certain dynamically-generated servlet and JSP files. This feature is only available on Windows versions of IBM HTTP Server.

  The afpaplugin_20.dll component that is compatible with IBM HTTP Server V6.0 and later must be configured by WAS.

  For details on how to enable this capability, see the external caching description in the WAS documentation.

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Sub-topics

Customizing Fast Response Cache Accelerator logging

Restrictions on cached content

Fast Response Cache Accelerator operational restrictions

Servlets and JavaServer Pages files caching

AIX considerations for Fast Response Cache Accelerator (FRCA)

AFPA directives