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5 Single-Master Replication Operation : 5.7 Performing Failover

Failover is the replacement of the publication database by the subscription database should a failure occur on the publication database or its host. Failover is considered an irreversible action so the subscription database permanently takes over the role of the publication database.
If the control schema objects on the publication database (that is, schemas _edb_replicator_pub, _edb_replicator_sub, _edb_scheduler, and their objects) cannot be salvaged or restored from a backup, then performing a failover may only be possible with the assistance of EnterpriseDB Technical Support Services.

5 Single-Master Replication Operation : 5.7 Performing Failover

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