This is a command-line option for the
This option tells MariaDB Backup to obtain a read metadata lock for each table, which can prevent concurrent DDL from occurring during the backup. Before the backup starts, MariaDB Backup acquires a metadata lock for each individual table on the system. The metadata locks are released when the backup completes.
See also: Options for mariadb-backup & mariabackup in MariaDB Enterprise Server 23.08, in 23.07 ES, in 10.6 ES, in 10.5 ES, in 10.4 ES, in 10.3 ES, in 10.2 ES, in 10.6 CS, in 10.5 CS, in 10.4 CS, in 10.3 CS, and in 10.2 CS