Pathway/iTS System Management Manual (G06.24+)

HP NonStop Pathway/iTS System Management Manual—426748-002
D-1
D Migration Information
This appendix covers migration and compatibility issues for Pathway applications that
include the HP NonStop Pathway/iTS product on C-series and D-series systems. The
following topics are discussed:
•
Interprocess communication issues
•
Application conversion
For more information about running applications on systems running the D-series RVU,
see the Guardian Application Conversion Guide.
Interprocess Communication Issues
The Pathway/iTS product supports D-series operating system features as follows:
•
Requester processes can run at high and low PINs.
•
Terminal control processes (TCPs) can run at a high PIN under the following
conditions:
•
The Pathway/iTS HIGHPIN option is set to ON for the TCP object. (The default
value is OFF.)
•
The ?HIGHPIN option is set by compiler or binder directive in the object file.
•
There is a high PIN available.
Alternatively, to force a TCP to run at a low PIN, even if the other conditions for
running at a high PIN are satisfied, leave the HIGHPIN option set to OFF (the
default value) or, to document your intention, set the HIGHPIN option to OFF with
the SET TCP command.
If you have configured your PATHMON environment to allow the use of high PINs, you
can define additional server classes without exhausting PINs that you might need for
other processes. Additionally, you have more freedom to define servers as static, thus
reducing the overhead associated with process startup.
D-series processes and associated application processes can run in many
combinations of high and low PINs. Table D-1 lists the possible communication paths
for D-series Pathway/iTS processes.
Note. There is no direct migration path for PATHMON environments from C-series systems to
D40.00 or later systems running the D-series RVU. In addition, interoperability between
PATHMON environment processes on C-series systems and D40 or later systems running the
D-series RVU is not supported.
For information about migrating a PATHMON environment from a C-series system to an
earlier-release D-series system, and also for information about interoperation between
PATHMON environment processes on C-series and systems running the D-series RVU, see
the “Migration Information” appendix in the D30.02 version of the TS/MP and Pathway System
Management Guide.