This IBM Redbooks publication provides detailed instructions and scripts for managing failover and switchback in a WebSphere Replication Server for z/OS bidirectional Q replication environment for the z/OS platform. A typical business scenario is used to showcase the bidirectional failover/switchback implementation. This book also includes a WebSphere MQ shared disk and WebSphere MQ shared queue high availability scenario for the source system in a Q replication environment involving unidirectional replication. Key considerations in designing and implementing such environments are discussed.

This book is aimed at an audience of IT architects and database administrators (DBAs) responsible for developing high-availability solutions on the z/OS platform.

Chapter 1. High availability concepts

Chapter 2. WebSphere Replication Server Q replication overview

Chapter 3. Failover and switchback scenarios

Chapter 4. WebSphere MQ shared queues and unidirectional replication

Chapter 5. WebSphere MQ shared disk and unidirectional replication

Appendix A. Summary of code and scripts used in the scenarios

Appendix B. Exception processing in a bidirectional Q replication environment

Appendix C. WebSphere shared queues and shared disk overview

Appendix D. Additional material