Learn COBOL-VARIANTS with Real Code Examples

Optimize file reads with indexed or relative access

Minimize nested PERFORM loops where possible

Batch process large datasets during off-peak hours

Use efficient arithmetic and string handling

Avoid unnecessary conversions between numeric and alphanumeric

Handle sensitive data like payroll or bank records carefully

Implement proper file access controls

Ensure batch job execution is restricted to authorized users

Audit logs for critical transaction processing

Encrypt external database connections when possible

Review batch job logs

Monitor performance metrics on mainframe

Track transaction success/failure rates

Audit database updates and file writes

Identify bottlenecks in procedural flow

Follow division and paragraph conventions

Use meaningful variable and paragraph names

Comment complex business logic

Modularize with subprograms and copybooks

Unit test small procedures