File Caching & mod_cache & eAcclereator.

helo..

i just need some clear guide line
we are using eAcclereator for cacheing script.....

few minutes back i read about File caching.. doing a search i found apache module
mod_cahcce,
details can be found herebellow url)
http://httpd.apache.org/docs/2.2/caching.html

mod_file_cache
http://httpd.apache.org/docs/2.2/mod...ile_cache.html

in mod_cache

mod_cache implements an RFC 2616 compliant HTTP content cache that can be used to cache either local or proxied content. mod_cache requires the services of one or more storage management modules. Two storage management modules are included in the base Apache distribution:

mod_disk_cache
implements a disk based storage manager.
mod_mem_cache
implements a memory based storage manager. mod_mem_cache can be configured to operate in two modes: caching open file descriptors or caching objects in heap storage. mod_mem_cache can be used to cache locally generated content or to cache backend server content for mod_proxy when configured using ProxyPass (aka reverse proxy)

whats the difference between filecache & eAcclerator(i thought eAcc it self a filecacher)
do we need mod_cache (apache module)

n so far i know pecl Memcache(http://pecl.php.net/package/memcache) -it cache mysql.




now whats the diff between eAcclereator & Mod_cache & mod_file_cache.

can all of them stay together?

suggetion & discussion is warmly welcomed.