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
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Configuration Example for the Distributor Listening
Model
start TELSERV primary and backup processes in every other processor. Note that the
backup TELSERV processes do not share any processors with other TELSERV
processes. Running TELSERV processes in distinct processor pairs avoids potential
port sharing conflicts in a failure situation. (See Port Collision Considerations for
Listening Processes on page 2-5.)
Configuration Example for the Distributor Listening Model
This example demonstrates the distributor listener model discussed above (see
Distributor Listening Model on page 3-6) using a hypothetical distributor called “Distrib”
configured with round-robin enabled. This configuration has five processors running
three Distrib servers and controlling the socket I/O for the server classes they control.
All the connections share the same IP address on the same G4SA. The G4SA
round-robin distributes incoming connections to the different Distrib instances.
The startup files and subnet initiation files for establishing the Parallel Library TCP/IP
environment and subnets are the same as Configuration Example for the Standard
Listening Model.
In this example, TCPIPUP4, the main command file, does not include the complete
configuration commands for Distrib Server. (You must substitute real RUN commands
for your distributor listener applications.)
Figure 3-9 shows the round-robin feature in this configuration. We have configured a
Distrib in processors 3 through 5, bound them to the same port, and enabled
round-robin filtering on those processes. (See Round-Robin Filtering on page 2-4.)