MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0

22.2.7 Safe Shutdown and Restart of NDB Cluster

To shut down the cluster, enter the following command in a shell on the machine hosting the management node:

shell> ndb_mgm -e shutdown

The -e option here is used to pass a command to the ndb_mgm client from the shell. (See Section 22.4.31, “Options Common to NDB Cluster Programs — Options Common to NDB Cluster Programs”, for more information about this option.) The command causes the ndb_mgm, ndb_mgmd, and any ndbd or ndbmtd processes to terminate gracefully. Any SQL nodes can be terminated using mysqladmin shutdown and other means. On Windows platforms, assuming that you have installed the SQL node as a Windows service, you can use SC STOP service_name or NET STOP service_name.

To restart the cluster on Unix platforms, run these commands:

On Windows platforms, assuming that you have installed all NDB Cluster processes as Windows services using the default service names (see Section, “Installing NDB Cluster Processes as Windows Services”), you can restart the cluster as follows:

In a production setting, it is usually not desirable to shut down the cluster completely. In many cases, even when making configuration changes, or performing upgrades to the cluster hardware or software (or both), which require shutting down individual host machines, it is possible to do so without shutting down the cluster as a whole by performing a rolling restart of the cluster. For more information about doing this, see Section 22.5.5, “Performing a Rolling Restart of an NDB Cluster”.