This combination of features is fundamental to creating reusable and flexible DataStage jobs. Parameters, parameter sets, and environment variables allow developers to externalize configuration details (like file paths, database credentials, or processing logic switches) from the core job design. This enables a single job to be executed in different environments (development, testing, production) or with different inputs without modification. DataStage components, specifically shared containers, allow a sequence of stages and logic to be encapsulated into a single, reusable unit that can be embedded in multiple jobs, promoting modularity and ensuring consistency.

A. DataStage APIs are primarily for programmatic control, automation, and integration, not for making the internal job design reusable.

B. Connectors and stages are fundamental, pre-built building blocks, not features specifically designed by a user to create their own reusable logic patterns.

D. Dynamic Workload Management and ELT run mode are primarily features for performance optimization and resource management, not design reusability.

1. Parameters and Parameter Sets: The official IBM documentation states

"You can create parameter sets to store job parameters that you want to use in different jobs or in different instances of the same job." This directly supports their role in reusability and flexibility.

Source: IBM Cloud Pak for Data 4.8 Documentation

"Creating and using parameter sets".

2. Environment Variables: Environment variables are used to define configuration values outside of the job design

making jobs portable and flexible across different execution environments.

Source: IBM Cloud Pak for Data 4.8 Documentation

"Creating environment variables".

3. DataStage Components (Shared Containers): Shared containers are the primary mechanism for creating reusable logic components. The documentation notes

"You can use shared containers to make a reusable job component available to all the jobs in a project."

Source: IBM Cloud Pak for Data 4.8 Documentation

"Shared containers".