This IBM Redbooks publication provides detailed instructions and scripts on managing failover and switchback in a bidirectional Q replication environment for the AIX platform.

A typical business scenario is used to showcase the bidirectional failover/switchback implementation. The book also includes a HADR 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 organized into the following topics:

- High availability concepts

- WebSphere Replication Server Q replication overview

- Failover and switchback scenarios

- HADR and Q replication coexistence scenario

- Summary of code and scripts used in the scenarios

- Exception processing in a bidirectional Q replication environment

- Overview of HADR and DB2 Client Reroute

Chapter 1. High availability concepts

Chapter 2. WebSphere Replication Server Q replication overview

Chapter 3. Failover and switchback scenarios

Chapter 4. HADR and Q replication coexistence scenario

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

Appendix B. Exception processing in a bidirectional Q replication environment

Appendix C. Overview of HADR and DB2 Client Reroute

Appendix D. Additional material