RSC/MP Installation and Configuration Guide

Configuring the RSC/MP Transport (Piccolo) Backup Process
5. Start the Pipeman and NIF processes using the PIPECP START command. See
Automatic Startup of Piccolo on page 5-13 for information about automatically
starting the subsystem. See PIPECP Commands on page 9-2 for information
about the PIPECP START command.
Note. The configuration file must be closed before Piccolo can be started.
6. Verify that your system is up and running and that your network interface is
registered by using the STATUS command in the PIPECP window.
7. Using the PIPECP CONNECT command with the system name of the NonStop
host, check that the RSC/MP Transport (Piccolo) is functioning correctly.
Backup Process
For NonStop systems only, the Piccolo Active Backup feature is implemented using the
persistent model. Upon failure of the primary Pipeman process or primary CPU, the
backup process will recover a subset of the configuration information at the time of the
failure and will begin running using that configuration. The TDP PIPE object will report
a PIPERC_PIPEMAN_NOT_RUNNING or PIPERC_PIPEMAN_RESTARTED error
and will enter an automatic restart loop. All outstanding open pipes will be closed.
Limited information is recovered from the backup process. Changes to the Piccolo
configuration file while the primary process is running may produce undesirable effects.
The following configuration information is recovered from the backup process:
The current LogLevel. When the backup process takes over it uses the log level
that was set in the primary process when the primary process fails. The LogLevel
entry in the configuration file is ignored. See Specifying Piccolo Logging on
page 5-17 for more information about using logs.
The list of currently running NIFs. The NifList entry in the configuration file is
ignored.
All other configuration information other than the LogLevel and NifList are read from
the copy of the Piccolo configuration file that is current at the time of recovery.
See the PIPECP STATUS command in section PIPECP Commands on page 9-2 for a
status of the primary and backup processes.
HP NonStop Remote Server Call (RSC/MP) Installation and Configuration G uide — 52235 8- 013
5 -2