RSC/MP Installation and Configuration Guide

Configuring the RSC/MP Transport (Piccolo)

Overview of Piccolo

Piccolo consists of a single manager process (Pipeman) and one or more network

interface processes (NIFSOCK or NIFNB). These processes running together provide

the communications mechanism that connects the RSC/MP application running on the

workstation to the TDP running on the NonStop host, through RSCPIPE (which also

runs on the workstation). A single instance of Piccolo can support multiple TDP

processes on the NonStop host or multiple instances of RSCPIPE and RSC/MP

applications on a workstation as shown in Figure 5-1:

Figure 5-1. The Piccolo Components

NonStop Host

Workstation

TDP

PIPEMAN

NIF

RSC/MP

application

RSC/MP

application

RSCPIPE

PIPEMAN

NIF

CDT003

Configuration information for the Piccolo components (Pipeman and the NIF programs)

is read from a single Piccolo configuration file which is required to exist and to be

readable by the Piccolo compone nts at all times while the system is running. Along

with other information, the configuration file contains the unique name of the machine

on which Piccolo is running. This means that every Piccolo configuration file on the

host and workstation must be different.

Note. Do not alter the Piccolo configuration file while Piccolo is running. On Windows

and

NonStop

platforms, the PIPEMAN process locks its configuration file for read access, and

holds that lock for as long as Piccolo continues running. On UNIX platforms, the file is not

locked by Piccolo; changing the file while Piccolo is running will result in unpredictable

behavior.

HP NonStop Remote Server Call (RSC/MP) Installation and Configuration

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