Description:

Medusa is an architecture for very-high-performance TCP/IP servers
(like HTTP, FTP, and NNTP). Medusa is different from most other
servers because it runs as a single process, multiplexing I/O with its
various client and server connections within a single process/thread.

It is capable of smoother and higher performance than most other
servers, while placing a dramatically reduced load on the server
machine. The single-process, single-thread model simplifies design
and enables some new persistence capabilities that are otherwise
difficult or impossible to implement.