TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

Maximize the Benefit of the NonStop TCP/IPv6
Architecture
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012
3-8
Distributor Listening Model
The distributor listener model can benefit from the NonStop TCP/IPv6 architecture in
two ways:

You can now run multiple distributor processes in multiple processors bound to the
same port with round-robin filtering enabled. This arrangement lets you spread the
distributor’s workload over as many processors as required achieving unlimited
scalability while presenting a single IP host to the outside world.

You shorten the path length for data flow by eliminating the hop between the
distributor and the TCP/IP process, thereby improving performance.
Figure 3-4 shows the distributor listener model in NonStop TCP/IPv6. The
distributor can now be duplicated across processors and only one hop is required
for outbound traffic because each processor housing the distributors has direct
access to the adapter. Figure 3-4 also shows the round-robin distribution of
connection requests performed by the adapter and the presentation of one IP host.
Figure 3-4. Distributor Listening Model in NonStop TCP/IPv6
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
Server Class
Send or Other
IPC, Hop 1
Processor 3
Processor 5
Sockets
Single IP host
Processor 4
No hop
VST106.vsd
TCP/IPv6 LIB
TCP/IPv6 LIB
TCP/IPv6 LIB
TCP/IPv6 LIB
TCP/IPv6 LIB
TCP/IPv6 LIB