Persistent caching using files. WARNING: PHP 5.1.6 or newer is required. DOES NOT support WordPress MultiSite.
wp-file-cachefolder to the
wp-contentdirectory is writable by the web server: the plugin will need to copy
object-cache.phpfile into it.
wp-content/object-cache.phpfile exists. If it is not, please copy it from
wp-content/object-cache.phpfile wust me writable by the server since plugin stores its options in that file.