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Can I add data nodes to a MySQL Cluster without restarting it?

April 26, 2017cluster Data MySQL nodes Restarting

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Can I add data nodes to a MySQL Cluster without restarting it?

2 Answers

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Beginning with MySQL Cluster NDB 6.4, it is possible to add new data nodes to a running MySQL Cluster without taking it offline. For more information, see Section 17.7.8, “Adding MySQL Cluster Data Nodes Online”. For other types of MySQL Cluster nodes, a rolling restart is all that is required (see Section 17.5.1, “Performing a Rolling Restart of a MySQL Cluster”). In MySQL Cluster NDB 6.3 and earlier, it was not possible to add new data nodes without shutting down and restarting the MySQL Cluster.

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Beginning with MySQL Cluster NDB 6.4, it is possible to add new data nodes to a running MySQL Cluster without taking it offline. For more information, see Adding MySQL Cluster Data Nodes Online. For other types of MySQL Cluster nodes, a rolling restart is all that is required (see Performing a Rolling Restart of a MySQL Cluster). In MySQL Cluster NDB 6.3 and earlier, it was not possible to add new data nodes without shutting down and restarting the MySQL Cluster.