Initial Startup of NDB Cluster For configuration of NDB Cluster as relates to making backups, see Section 23.5.8.3, “Configuration for NDB Cluster Backups” . The default port for Cluster management nodes is 1186; the default port for data nodes is 2202. However, the cluster can automatically allocate ports for data nodes from those that are already free. Starting the cluster is not very difficult after it has been configured. Each cluster node process must be started separately, and on the host where it resides. The management node should be started first, followed by the data nodes, and then finally by any SQL nodes: The first time that it is started,  ndb_mgmd  must be told where to find its configuration file, using the  -f or  --config-file  option. This option requires that  --initial  or  --reload  also be specified; see Section 23.4.4, “ndb_mgmd — The NDB Cluster Management Server Daemon” , for details. If all has gone well, and the cluster has been set up correctly, the cluster should now be operational. You can test this by invoking the  ndb_mgm  management node client. The output should look like that shown here, although you might see some slight differences in the output depending upon the exact version of MySQL that you are using: The SQL node is referenced here as  [mysqld(API)] , which reflects the fact that the  mysqld  process is acting as an NDB Cluster API node. The IP address shown for a given NDB Cluster SQL or other API node in the output of  SHOW  is the address used by the SQL or API node to connect to the cluster data nodes, and not to any management node. Note shell>  ndb_mgm -- NDB Cluster -- Management Client -- ndb_mgm>  SHOW Connected to Management Server at: localhost:1186 Cluster Configuration --------------------- [ndbd(NDB)] 2 node(s) id=2 @198.51.100.30 (Version: 8.0.26-ndb-8.0.26, Nodegroup: 0, *) id=3 @198.51.100.40 (Version: 8.0.26-ndb-8.0.26, Nodegroup: 0) [ndb_mgmd(MGM)] 1 node(s) id=1 @198.51.100.10 (Version: 8.0.26-ndb-8.0.26) [mysqld(API)] 1 node(s) id=4 @198.51.100.20 (Version: 8.0.26-ndb-8.0.26) shell>  ndbd shell>  ndb_mgmd --initial -f /var/lib/mysql-cluster/config.ini 3. If you used RPM files to install MySQL on the cluster host where the SQL node is to reside, you can (and should) use the supplied startup script to start the MySQL server process on the SQL node. 2. On each of the data node hosts, run this command to start the  ndbd  process: 1. On the management host, issue the following command from the system shell to start the management node process: 23.2.4 Initial Startup of NDB Cluster Note 3998