FastCGI
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Variation of Common Gateway Interface, aimed to reduce overhead associated with interfacing the web server and CGI programs. Allows the server to handle more requests.
- instead of creating a new process for each request, FastCGI uses persistent processes to handle many requests each
- processes are owned by the FastCGI server rather than the web server
- avoids process creation/termination overhead
- for a request, web server sends env information and the page request to a FastCGI process via sockets or TCP
- in NGINX, the
fastcgi_cache and proxy_cache directives have the same end behaviour, with different backend protocols
FastCGI is a cluster of workers that processes requests from NGINX
