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What does the syntax server unix:/tmp/backend; do? Does that serve from the local filesystem without going through another http daemon?

• jimaek 14y ago
  It was used just as an example that you can use anything as an upstream. Its just a unix socket that can be listened by php-fpm for example.
• dignan 14y ago
  It uses a unix socket. It's also a bit faster than using a TCP socket to proxy (at least in my limited testing), so I prefer it.