APC storage engine for cache
File Storage engine for cache. Filestorage is the slowest cache storage to read and write. However, it is good for servers that don't have other storage engine available, or have content which is not performance sensitive.
Memcache storage engine for cache. Memcache has some limitations in the amount of control you have over expire times far in the future. See MemcacheEngine::write() for more information.
Wincache storage engine for cache
Xcache storage engine for cache