Earlier versions of the Cluster Edition did not allow nodes to join or leave the cluster during a database or transaction log dump. Any instances started during a dump waited until the dump finished before completing its start-up, and instances waited until the dump was complete before shutting down.
For Cluster Edition 15.0.3 and later, nodes—and the instances running on them—can join or leave the cluster while another instance runs dump database or dump transaction.
Nodes can join and leave the cluster only during phase one of dump database. The phases are displayed during the dump database command:
Backup Server: 3.43.1.1: Dump phase number 1 completed. Backup Server: 3.43.1.1: Dump phase number 2 completed. Backup Server: 3.43.1.1: Dump phase number 3 completed.
If a node attempts to join or leave during phase two or phase three of dump database, it waits to join until dump database completes.
Nodes may leave a cluster politely during a database dump from a normal shutdown.
Once you configure multiple Backup Servers for the cluster, you need not perform any additional configuration to enable nodes to join or leave the cluster during a dump database or dump transaction.
