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
3-9
Hybrid Listener Model
of connection requests performed by the adapter and the presentation of one IP
host.
Configuration Example for the Distributor Listening Model on page 3-18 shows you
how to configure this listener model.
Hybrid Listener Model
This method still has a distributor process using Pathway for managing and load-
balancing server process instances, but it uses the standard listener approach,
handing off connections, so that data does not have to flow through the distributor
process. This method de-couples the data and control flows. This de-coupling
facilitates low-overhead scalability when combined with Parallel Library TCP/IP.
Figure 3-4. Distributor Listening Model in Parallel Library TCP/IP
VST0304.vsd
LAN Adapter
Round-robin distribution
of incoming connection
requests
Server
Classes
A, D, G
Server
Classes
A, D, G
Processor 0
Server Classes
A, D, G
Processor 0
Processor 1
Processor 2
Server
Classes
A, D, G
Server
Classes
A, D, G
Processor 0
Server Classes
A, D, G
Processor 0
Processor 1
Processor 2
Server
Classes
A, D, G
Server
Classes
A, D, G
Processor 0
Server Classes
A, D, G
Processor 0
Processor 1
Processor 2
Distributor
Distributor
Distributor
Processor 3
Processor 5
Single IP host
Processor 4
No hop
Server Class
Send or
Other IPC,
Hop 1
TCP/IP Library
TCP/IP Library
TCP/IP Library
TCP/IP Library
TCP/IP Library
TCP/IP Library
Sockets