GDSX Manual

Overview of GDSX
Extended General Device Support (GDSX) Manual–134303
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When to Use GDSX
See Section 8, “Service Routines,” for more information about these procedures and
Section D, “Using Pseudo Procedures in a NonStop TS/MP Environment,” for an
example of using them in a user task.
When to Use GDSX
GDSX is a very complex product, and should not be used to implement an application if
Pathway/TS alone can handle the application requirements. For any of the following
reasons, however, a GDSX process may be used as a front end to a Pathway/TS
application:
•
The specified data communications protocols are not supported by the Pathway/TS
TCP. One example is Tandem OSI/TS.
•
Performance is critical. Interpreted SCREEN COBOL may not be efficient enough
when used to program a data communications protocol.
•
Simplicity of programming is critical. Handling a data communications protocol
can be awkward with SCREEN COBOL, which has a limited set of data types and
verbs.
For more information about alternatives to GDSX, including RSC, see Introduction to
NonStop Transaction Processing.