Upgrading
The upgrading information in the CICS® Transaction Server for z/OS® product documentation provides an overview of changes to CICS externals across releases and explains the actions that you need to take to move what you have today in your current release to new capabilities, whether those are in a whole new release or supplied as service on your existing release. CICS TS upgrading information is provided in full in the latest CICS TS documentation and it contains upgrading information for all supported CICS TS releases including CICS TS 5.5.
Whether you are upgrading to CICS TS 5.5 from a lower release, or you are upgrading from CICS TS 5.5 to a higher, supported release of CICS TS, follow the Upgrading information, or its PDF format, provided with the CICS TS product documentation of the latest release.
This page provides an outline of CICS TS upgrading information. Follow the links to view the upgrading topics in the latest CICS TS documentation.
Getting started with upgrading
You can upgrade your whole environment, or you can run two versions concurrently. You can also apply new capabilities during a release, known as continuous delivery, by applying service that provides those capabilities.
Upgrading to a higher release of CICS TS
The following topics tell you how to migrate your CICS environment to a higher release, or from Developer Trial to another edition of CICS TS. Each topic covers a different aspect of CICS configuration and summarizes the actions that you need to take to upgrade from one release to another.
Post-upgrade tasks
After you have upgraded your CICS TS regions or CICSPlex SM to the new release, you can proceed with upgrading CICS applications, connections and web services. These upgrade actions can be scheduled at a later, convenient time.
Upgrading between releases with CICS continuous delivery
CICS continuous delivery provides new functions, capabilities, and technologies between product releases through the service channel or as separate downloads. To take advantage of such additional functions, apply the service APARs. For details, see Upgrading between releases with CICS continuous delivery.
Explore upgrade scenarios
Changes between releases
The following topics help you understand the impact of changes to CICS TS between versions or releases of the product.
- Major areas of technology change by release of CICS TS
- Changes to installing
- Changes to security
- Changes to RACF® classes
- Changes to performance
- Changes to CICS API
- Changes to JCICS API
- Changes to CICS support for application programming languages
- Changes to CICS assistants
- Changes to SIT parameters
- Changes to JVM profiles
- Changes to resource definitions
- Changes to control tables
- Changes to CICS SPI
- Changes to CICS transactions
- Changes to CEMT
- Changes to CICS monitoring
- Changes to CICS statistics
- Changes to storage
- Changes to CICS utilities
- Changes to global user exits and task-related user exits
- Changes to CICS XPI
- Changes to CICS user-replaceable programs
- Changes to messages and codes
- Changes to samples
- Changes to CICSPlex SM
- Changes to feature toggles
- Changes to CICS policies
- Changes to documentation
- Summary of changes from end-of-service releases
- Stabilization notices and discontinued functions