Learn PLI-MAINFRAME with Real Code Examples

Generate monthly payroll reports from employee data

Process bank transactions overnight using batch jobs

Read VSAM files, apply calculations, and output summaries

Integrate with DB2 to update account balances

Schedule recurring batch jobs via JCL for automation

Check dataset availability and permissions

Review compiler warnings and errors

Verify JCL for correct dataset references

Debug calculation and file processing logic

Monitor batch job logs for runtime issues

Unit test subroutines and modular code

Run batch jobs in test datasets

Verify DB2 updates with test queries

Check VSAM dataset read/write accuracy

Validate output reports against expected results

Batch execution via JCL on mainframe

Online execution via CICS transaction

Integration with scheduling tools for recurring jobs

Load modules deployed in production libraries

Monitor and maintain programs over lifecycle

IBM PLI compiler and runtime libraries

TSO/ISPF editor for mainframe development

CICS for transaction processing

DB2 for database integration

JCL for batch scheduling

VSAM and sequential datasets for file I/O

DB2 relational database for structured storage

CICS for online transaction processing

MQ Series for messaging and batch triggers

Mainframe schedulers for automated job execution

Use copybooks for reusable data structures

Optimize dataset access patterns

Modularize code with subroutines

Schedule batch jobs for off-peak hours

Document workflows and JCL for clarity

Limited modern IDE support

Debugging batch programs is less interactive

Legacy documentation may be sparse

Maintaining and modernizing old codebases

Optimizing high-volume mainframe workloads