We are in the process of migrating some forums from VB to XF. Currently APC cache is configured at the server level, but as far as Xenforo is concerned the config.php has no cache enabled. I've noticed even with no cache defined I still need to rebuild cache to get the forums & threads to appear on the site. My question is does Xenforo do some sort of cache on the file server or somewhere if no cache is defined? I'm trying to understand what cache I need to rebuild, especially at go-live time to reduce downtime during the migration. There are hundreds of thousands of users and rebuilding the user cache takes several hours. We do plan on adding memcache soon but I'd like to understand what gets cached and where if caching is enabled or disabled. thanks!