TCP/IP (Parallel Library) Configuration and Management Manual

Configuring Parallel Library TCP/IP for Complex and

Heavy-Use Environments

HP NonStop TCP/IP (Parallel Library) Configuration and Management Manual—522271-006

3-4

Monolithic Listening Model

In this method, the listener binds to a well-known port, (for example port 23 for

TELSERV). Next, the listening process issues a standard accept call. Finally, the

monolithic listening model then uses multi-threading to handle all connections within

the same process creating sockets for the connections. The listening process is the

common point where all incoming connections are handled as well as control and data

flow. To achieve parallelism with the monolithic model in conventional TCP/IP, you run

multiple instances of the listening process, each with a different well-known port

number, and then inform the workstation clients to use a different destination port

number.

The monolithic listener model can benefit from the Parallel Library TCP/IP architecture

because, with round-robin filtering enabled, all processors have access to the same

port. Hence, you can run multiple copies of the listening process in different processors

and bind them all to the same well-known port. By sharing the same port number

among the processes, you no longer need to set up workstation clients with multiple

port numbers to call.

Figure 3-2 on page 3-5 compares the monolithic server model in the conventional

TCP/IP and Parallel Library TCP/IP environments.