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Notes:
- The Fast Response Cache Accelerator is also known as the Cache Accelerator.
- Support for the Fast Response Cache Accelerator (FRCA) is not yet available on AIX 5.x.
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- Pages with dynamic content (e.g. SSI, CGI, Java) are not cached.
- Default welcome pages are not cached. GET requests ending in / cannot be served out of the cache.
- Access-protected documents, and pages requested over SSL are not cached.
- Cache Accelerator supports only limited multi-language content negotiation. Only a single language version is cached where a given URL maps to multiple translated versions.
- Cache Accelerator listens on all the IP adapters of a server, on the port specified by the Port directive.
The Cache Accelerator cannot be configured to listen on some IP adapters, but not others.
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Only Valid on Windows NT:
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- Files larger than 64KB are not cached.
- Cache Accelerator does not cache files on, or log to locally mounted remote file systems (DFS, NFS, and so on).
- IP-based Virtual Host caching is not supported. The Cache Accelerator should be disabled for those directories.
Use the "AfpaCache off" directive in any IP-based virtual host definitions.
- Name-based virtual hosts are supported.
- Currently IBM HTTP Server Cache Accelerator does not run as a Proxy Server.
- Expires headers are not returned on cached responses.
- Cache Accelerator access log is not integrated into the HTTP Server access log.
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Only Valid on Windows NT:
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- If you enable the Cache Accelerator, set the MaxRequestPerChild directive to 0, to work around a problem that occurs
when the child process is killed and restarted on a loaded Web server.
- Only one instance of the server can be active, when running the Cache Accelerator.
- IBM HTTP Server should not be installed on a machine that is running IBM Netfinity Web Server Accelerator.
- There are no facilities for monitoring the Cache Accelerator (number or names of the files cached, for example)
other than access logging.
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