ndb_mgm — The NDB Cluster Management Client 23.4.5 ndb_mgm — The NDB Cluster Management Client The  ndb_mgm  management client process is actually not needed to run the cluster. Its value lies in providing a set of commands for checking the cluster’s status, starting backups, and performing other administrative functions. The management client accesses the management server using a C API. Advanced users can also employ this API for programming dedicated management processes to perform tasks similar to those performed by  ndb_mgm . To start the management client, it is necessary to supply the host name and port number of the management server: For example: The default host name and port number are  localhost  and 1186, respectively. All options that can be used with  ndb_mgm  are shown in the following table. Additional descriptions follow the table. 4268 shell>  ndb_mgm [ host_name  [ port_num ]] shell>  ndb_mgm ndb_mgmd.mysql.com 1186 Table 23.27 Command-line options used with the program ndb_mgm Format Description Added, Deprecated, or Removed --backup-password-from- stdin[=value] Get decryption password in a secure fashion from STDIN; use together with --execute and START BACKUP command ADDED: NDB 8.0.24 --character-sets-dir=path Directory containing character sets (Supported in all NDB releases based on MySQL 8.0) --connect-retries=# Set number of times to retry connection before giving up; 0 means 1 attempt only (and no retries) (Supported in all NDB releases based on MySQL 8.0) --connect-retry-delay=# Number of seconds to wait between attempts to contact management server (Supported in all NDB releases based on MySQL 8.0) --connect- string=connection-string , -c Same as --ndb-connectstring (Supported in all NDB releases based on MySQL 8.0) --core-file Write core file on error; used in debugging (Supported in all NDB releases based on MySQL 8.0) --defaults-extra- file=path Read given file after global files are read (Supported in all NDB releases based on MySQL 8.0) --defaults-file=path Read default options from given file only (Supported in all NDB releases based on MySQL 8.0) --defaults-group- suffix=string Also read groups with concat(group, suffix) (Supported in all NDB releases based on MySQL 8.0) --encrypt-backup[=TRUE| FALSE] Cause START BACKUP to encrypt whenever making a ADDED: NDB 8.0.24