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16.6.0 released on Mar 08, 2023 | articles updated on Mar 20, 2023


To run Vely web application with FastCGI protocol, you need to setup a reverse proxy, i.e. a web server that will forward request and send replies back to clients. Vely application runs as a number of (zero or more) background processes in parallel, processing requests.

Setting up reverse proxy (web server)

To access your application via a reverse proxy (i.e. web server), generally you need to add a proxy directive and restart the web server.

If you use Apache, you need to connect it to your application, see connect_apache_tcp_socket (for using TCP sockets) and connect_apache_unix_socket (for using Unix sockets).

If you use Nginx, you need to connect it to your application, see connect_nginx_tcp_socket (for using TCP sockets) and connect_nginx_unix_socket (for using Unix sockets).

Starting FastCGI server processes

Use vf, for example:
vf <app name>
which in general will start zero or more background resident process(es) (daemons) that process requests in parallel.

Connection timeout

In a heavy-load environment, a client's connection may be rejected by the server. This may happen if the client runs very slowly due to swapping perhaps. Once a client establishes a connection, it has up to 5 seconds by default to send data; if it doesn't, the server will close the connection. Typically, FastCGI clients send data right away, but due to a heavy load, this time may be longer. To set the connection timeout in milliseconds, set the following variable before starting the application server, for instance:
vf -w 1 <app name>
In this case, the timeout is set to 8 seconds.

See also

Running application ( application_setup   CGI   Client_API   command_line   containerize_application   FastCGI   FastCGI_client   plain_C_FCGI  )  SEE ALL (documentation)

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