In define.php fiile you have defnitions of two constants which determines location of configuration and cache files
define('W3TC_CACHE_DIR', WP_CONTENT_DIR . '/cache'); define('W3TC_CONFIG_DIR', WP_CONTENT_DIR . '/w3tc-config');
It would be much more flexible to define them as:
if (!defined('W3TC_CACHE_DIR')) define('W3TC_CACHE_DIR', WP_CONTENT_DIR . '/cache'); if (!defined('W3TC_CONFIG_DIR')) define('W3TC_CONFIG_DIR', WP_CONTENT_DIR . '/w3tc-config');
Flexibility and pragmatism is the reason why many experienced developers use WordPress. In my case I created the setup where many sites may run from the same directory (use the same theme, the same set of plugins, but different database and upload dirs). It is a bit simmilar to multisite but for some reasosns better for me. It is easy to setup and maintain thanks to clever wp-config.php file. Unfortunately I cannot use W3TotalCache in this setup beacuse I cannot define config dirs for each site separately (especially there are some problems with CDN paths). This small fix would help in this case. I know my configuration may seem a bit strange, but why not. I use no dirty hacks, no bad practices, just WordPress flexibility.
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