Distributed transaction processing overview

These topics describe the basic concepts of CICS® distributed transaction processing (DTP) and what you must consider when designing DTP applications.

DTP’s place in the CICS intercommunication facilities
Today, an increasing number of organizations are connecting their information systems together and distributing resources among them. To support this kind of processing, applications need to be designed and developed to access resources across multiple systems.
What is DTP?
DTP is one of the ways in which CICS allows processing to be split between intercommunicating systems. Only DTP allows two or more communicating application programs to run simultaneously in different systems and to pass data back and forth between themselves—that is, to carry on a conversation.
Distributed processes
A transaction can initiate other transactions, and hence, conversations. In a complex process, a distinct hierarchy emerges, usually with the terminal-initiated transaction at the top.
Maintaining data integrity
Design your application to cope with the things that can go wrong while a transaction is running, for example, a session failing. The conversation protocol helps you recover from errors and ensures that the two sides remain in step with each other. This use of the protocol is called synchronization.
Designing distributed processes
These topics discuss the issues you must consider when designing distributed processes to run under APPC or MRO. These issues include structuring distributed processes and designing conversations.

Last updated: Tuesday, 22 December 2020 23:01