Super server daemon
wikipedia Super-server
A super-server or sometimes called a service dispatcher is a type of daemon run generally on Unix-like systems.
Principle of Super-server
Usage
A super-server starts other servers when needed, normally with access to them checked by a TCP wrapper. It uses very few resources when in idle state. This can be ideal for workstations used for local web development, client/server development[citation needed] or low-traffic daemons with occasional usage (such as ident and SSH).
NOTE: 超级服务器在需要时启动其他服务器，通常可以通过TCP包装器检查它们。 它处于空闲状态时使用的资源非常少。 这对于用于本地Web开发，客户端/服务器开发[需要引用]或偶尔使用的低流量守护进程（例如ident和SSH）的工作站来说是理想的。
Performance
There is a slight delay in connecting to the sub-daemons. Thus, when compared to standalone servers, a super-server setup may perform worse, especially when under high load. Some servers, such as hpa-tftpd, therefore take over the internet socket and listen on it themselves for some specified interval, anticipating more connections to come.