MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0

22.5.15 Adding NDB Cluster Data Nodes Online

This section describes how to add NDB Cluster data nodes online—that is, without needing to shut down the cluster completely and restart it as part of the process.

Important

Currently, you must add new data nodes to an NDB Cluster as part of a new node group. In addition, it is not possible to change the number of replicas (or the number of nodes per node group) online.