The HADR option for Pacemaker-managed Db2 instances

You can configure a Db2 instance that is running on a Pacemaker-managed Linux cluster to use the HADR high availability option.

Important: In Db2® 11.5.8 and later, Mutual Failover high availability is supported when using Pacemaker as the integrated cluster manager. In Db2 11.5.6 and later, the Pacemaker cluster manager for automated fail-over to HADR standby databases is packaged and installed with Db2. In Db2 11.5.5, Pacemaker is included and available for production environments. In Db2 11.5.4, Pacemaker is included as a technology preview only, for development, test, and proof-of-concept environments.

High availability disaster recovery (HADR) provides a high availability solution for both partial and complete site failures. HADR protects against data loss by replicating data changes from a source database, called the primary database, to the target databases, called the standby databases. HADR supports up to three remote standby servers.