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CICS® Interdependency Analyzer (CICS IA) is a runtime tool for use with CICS Transaction Server for z/OS®. It has two main purposes: To identify the sets of resources that are used by individual CICS transactions and their relationships to other resources. To collect and analyze data about transaction affinities. Transaction affinities require particular groups of transactions to be run either in the same CICS region or in a particular region. In this IBM Redbooks publication, we first provide a detail overview of what CICS IA is and what business issues it addresses before we review the installation and customization of the product. We discuss the scanner and collector components in detail, and we then focus on the query interface and the new CICS IA Explorer.

This IBM Redbooks document is a comprehensive guide to threadsafe concepts and implementation in the context of CICS. In addition to providing detailed instructions for implementing threadsafe in your environment, it describes the real world experiences of users migrating applications to be threadsafe, along with our own experiences. It also presents a discussion of the two most critical aspects of threadsafe, system performance and integrity. Originally, CICS employed a single TCB to process everything (such as application code, task dispatching, terminal control, file control, and so on) executed on what today is known as the application or Quasi-reentrant (QR) TCB. Over time, CICS added specialized TCBs to help offload management tasks from the overcrowded QR TCB. VSAM subtasking, the VTAM High Performance Option, and asynchronous journaling were all implemented on separate TCBs. Of course, the DB2 and MQ Series attachment facilities also employ TCBs apart from the application TCB. Distributing processing among multiple TCBs in a single CICS address space is not new, but customers and ISVs had little control over which TCB CICS is selected to dispatch a given function. Beginning with CICS Version 2, all of that has changed. Applications can execute on TCBs apart from the QR TCB. This has positive implications for improving system throughput and for implementing new technologies inside of CICS. Use of the MVS JVM inside CICS and enabling listener tasks written for other platforms to be imported to run und

This IBM Redbook focuses on CICS Migration to CICS TS 3.1, showing you how the CICS Tools (CICS Configuration Manager, CICS Interdependency Analyzer, and CICS Performance Analyzer) can help you with your migration. Part 1, "Introduce CICS TS 3.1 and the CICS Tools" on page1, gives an overview of the new functionality available in CICS TS 3.1 and an overview of the CICS Tools individually. Part 2, "Migration" on page111, looks at migration, discussing migration considerations and CICS TS 3.1 exploitation. It also looks at three migration scenarios: - Migrating CICS TS 2.3 CSD to CICS TS 3.1 CSD - Migrating CICS TS 2.3 CSD to CICSPlex SM TS 3.1 BAS - Migrating an Application to CICS Web Services in CICS TS 3.1