What is asynchronous I/O?

Asynchronous I/O (Input/Output) is a concept in computer science that allows I/O operations to be performed asynchronously and without waiting. Unlike synchronous I/O processing, where the application blocks while waiting for an I/O operation, asynchronous I/O processing performs I/O operations in the background while the application is doing other work can execute.

Asynchronous I/O processing is often used in server applications that need to process many concurrent connections. By using asynchronous I/O processing, the server can perform multiple I/O operations concurrently without blocking the application. This leads to improved scalability and performance of the application.