RSC/MP 7.3 Installation and Configuration Guide

Best Practices Guide
HP NonStop Remote Server Call (RSC/MP) Installation and Configuration Guide—522358-011
F-8
Scenario 2
Advantages
•
This configuration provides better throughput than does the configuration in
scenario 1: The DNS system distributes connections among the participating
NIFs, and the PIPEMAN process distributes the connections among the
participating TDPs in a round-robin fashion.
•
This configuration can tolerate the loss of a CPU or network adapter on the
host.
Disadvantages
•
This configuration is more complex than the configuration in scenario 1.
•
The PIPEMAN process can become a bottleneck when many workstations are
connected through it and are making many RSC/MP requests. The practical
saturation point of the PIPEMAN process can be as low as two or three TDPs
and two or three NIFs, depending on the load.
Figure F-5. Scenario 2 modified to run without round-robin DNS
Network
Servers
Servers
Servers
NonStop host
HOST1
CDT016
TDP
PIPEMAN
NIF
TDP
NIF NIFNIF
$ZTC0 $ZTC1 $ZTC2 $ZTC3
TDP
PIPEMAN
Application
NIF
RSCPIPE
workstation
(group “B”)
TCP/IP
workstation
(group “A”)
PIPEMAN
Application
NIF
TCP/IP
RSCPIPE
active backup
10.1.90.2310.1.90.2210.1.90.2110.1.90.20
Group B workstations have
[RESOLVER]
HOST1=ip:10.1.90.21,ip:10.1.90.22
Group A workstations have
[RESOLVER]
HOST1=ip:10.1.90.20,ip:10.1.90.21