TS/MP System Management Manual (G06.24+, H06.03+)

Migration Information
NonStop TS/MP System Management Manual—541819-001
D-2
Application Conversion Guidelines
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 processes.
If a process runs at a high PIN, all processes that communicate with that process must
be able to communicate with a high-PIN process. The characters “N.A.” indicate that
an option is not available.
By default, PATHCOM runs at a high PIN.
The PATHMON process runs at a low PIN. The PATHMON process can create server
processes at high PINs, however, if the following conditions are met:
•
The HIGHPIN option is set to ON for the object. (The default value is OFF.)
•
The HIGHPIN option is enabled in the object file.
•
There is a high PIN available.
Application Conversion Guidelines
Pathway applications originally developed for use on C-series systems can generally
run at low PINs without code change or recompilation. You might need to make the
following change in your initialization files, however: if you use a default subvolume
name in a file name that contains the volume name, include a subvolume specification
in the file name.
To run at a high PIN, a Pathway requester or server program must call selected D-
series operating system procedures and use HIGHPIN compile and bind options that
allow the program to run at a high PIN.
Table D-1. NonStop TS/MP Process High-PIN and Low-PIN Support
Operation PATHMON PATHCOM LINKMON
Run at a high PIN No Yes No
Service high-PIN server Yes N.A. Yes
Service high-PIN requesters Yes, when requesters
are named
N.A. Yes
Open a high-PIN process Yes Yes Yes
Create a high-PIN process Yes N.A. N.A.
Can be created by a high-PIN
process
Yes Yes N.A.