IBM Support

z/OS Upgrade and Installation

General Page

z/OS Upgrade and Installation

z/OS V2.4 - Unleashing innovation through an agile, optimized, and resilient platform 

Enterprises are turning to digital transformation to address new business challenges, reach new markets, and deliver new value to clients. Addressing new business opportunities demands effective digital transformation through the orchestration of technologies ranging from cloud, analytics, cognitive computing, mobile, and the Internet of Things to enable new internal and external client experiences.
IBM's approach is to unleash the rich application development talent that clients possess by enabling new application development processes and optimizing their existing application investment in new and innovative ways, while providing the application-level resiliency and security that clients have come to expect from IBM Z®.
Business success will be predicated on embracing agility, optimization, and resiliency:
  • Agility in the adoption of new technologies in DevOps, microservices, and consumption models that are delivered as a service to accelerate their time to value
  • Optimization through the ability to run computing workloads in the most efficient environment
  • Resiliency to deliver continuity of business services through exploitation of attributes such as encryption and high availability
These factors provide the ability to deliver results on demand and without interruption, which is critical to creating and maintaining a highly satisfying client experience.
With the IBM® z/OS® V2.4 operating system, IBM intends to unleash innovation through an agile, optimized, and resilient platform that helps clients to build applications and services based on a highly scalable and secure infrastructure that delivers the performance and availability for on-premises or provisioned as-a-service workloads that enable businesses to digitally transform.
As of z/OS V2R4, IBM® no longer provides a z/OS Migration publication. Since z/OS V2R2, the preferred method for learning about migration actions has been the z/OS Migration Workflow. Discovering, performing, and verifying many migration actions through the z/OSMF Workflows task instead of a more traditional book format allows for a tailored and specific migration path that is associated with a particular system.
Beginning with z/OS V2R4, IBM intends to continue to provide migration tasks in a z/OSMF workflow, as well as a single exported file. By providing the z/OS V2R4 migration materials in both formats, users still can enjoy the advantages of a z/OSMF workflow and be able to search, browse, and print in a more traditional format.
Along with the change of format (a workflow instead of a book) is a change in terminology: upgrade instead of migrate. In our industry, the process of replacing software with a newer level is most often referred to as upgrading the software. In contrast, the phrase migrating the software can be taken to mean moving software from one server to another. When you perform the actions that are described in the workflow, you are upgrading z/OS to a newer level of function than the prior release. Thus, upgrade is the appropriate term for what these workflows do.
In z/OS V2R4, the z/OS migration workflow is renamed to the z/OS Upgrade Workflow to better identify that each z/OS release contains a higher level of functionality than the prior release. In the workflow, the term upgrade is used in place of migration.
You can find the following resources on this web page:

z/OS V2R4 installation-related resources

z/OS V2R3 installation-related resources

z/OS V2R2 installation-related resources

IBM Education Assistance

You can find more information about enhancements for IBM® z/OS® V2R3 and other releases from the IBM Education Assistance site.


[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SWG90","label":"z\/OS"},"Component":"--","Platform":[{"code":"PF035","label":"z\/OS"}],"Version":"2.4","Edition":"","Line of Business":{"code":"LOB16","label":"Mainframe HW"}}]

Document Information

Modified date:
03 September 2021