Learn PLI-MAINFRAME with Real Code Examples

Procedural, modular program structure

Runs on IBM mainframe operating systems (z/OS, MVS)

Integrates with batch and online transaction systems

Data-centric design for files, tables, and DB2

Callable subroutines and programs for modularization

Programs compile to load modules

Input/output handled via datasets or DB2 connections

Batch jobs executed via JCL

Transaction programs executed via CICS

Subroutines called for reusable logic and modularity

Procedural modular design

File-oriented and database-driven workflows

Separation of batch and online transaction programs

Use of copybooks for shared data structures

Integration with mainframe transaction monitors

Payroll processing and HR batch jobs

Banking transaction overnight processing

Insurance claims batch processing

Report generation for finance and administration

CICS online transaction applications integrated with PLI modules

Structured procedural programming for clarity and maintainability

High reliability and performance on mainframes

Modularity through subroutines and copybooks

Optimized for file and transaction processing

Backward compatibility for long-lived enterprise systems

Optimize batch job scheduling to balance load

Use efficient loops and array operations

Leverage mainframe parallelism where possible

Minimize I/O bottlenecks by dataset optimization

Monitor system resources and tune performance

Assess legacy PLI programs for modernization

Refactor code for modularity and maintainability

Update datasets and DB2 structures as needed

Test programs in parallel with production systems

Document changes for long-term maintenance