This IBM® Redbooks® publication is intended to make System Programmers, Operators, and Availability Managers aware of the enhancements to recent releases of z/OS® and its major subsystems in the area of planned outage avoidance. It is a follow-on to, rather than a replacement for, z/OS Planned Outage Avoidance Checklist, SG24-7328.
Its primary objective is to bring together in one place information that is already available, but widely dispersed. It also presents a different perspective on planned outage avoidance. Most businesses care about application availability rather than the availability of a given system. Also, a planned outage is not necessarily a bad thing, as long as it does not impact application availability. In fact, running for too long without an IPL or subsystem restart may have a negative impact on application availability because it impacts your ability to apply preventive service. Therefore, we place more focus on decoupling the ability to make changes and updates to your system from IPLing or restarting your systems.
Table of contents
Chapter 1. Planned outage considerations
Chapter 2. Project planning and user experiences
Part 1. z/OS components
Chapter 3-17. z/OS enhancements
Part 2. z/OS middleware
Chapter 18. CICS considerations
Chapter 19. DB2 considerations
Chapter 20. IMS considerations
Chapter 21. WebSphere MQ for z/OS
Appendix A. Items requiring an IPL or recycle
Appendix B. DB2 UNIX file system maintenance considerations
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