What are the different types of CICS transactions and how do they differ from each other?

Types of CICS Transactions

In CICS, there are several types of transactions that serve different purposes. Some of the common types of CICS transactions include:

1. LUW (Local Unit of Work) transactions: These transactions operate within the local CICS region and are not shareable with other regions. They are suitable for handling small, independent tasks.
2. Global transactions: These transactions can access resources across multiple CICS regions and are used for processing distributed transactions that require coordination among multiple systems.
3. Pseudo conversational transactions: Pseudo conversational transactions maintain context between screens and user interactions, allowing users to navigate through different screens within the same transaction without losing data.
4. Long-running transactions: Long-running transactions are designed to handle tasks that require a significant amount of processing time or involve complex business logic. These transactions can run for an extended period without timing out.

Each type of CICS transaction has its unique characteristics and is suited for specific types of applications and processing requirements. Understanding the differences between these transactions can help developers choose the most appropriate type for their applications.