Percona XtraBackup 8 Enables –lock-ddl by Default

Percona XtraBackup 8.0.23 enables the “lock-ddl” option by default to ensure any DDL events do not corrupt the backups. Any DML events continue to occur, and only DDL events are blocked.
A DDL lock protects the definition of tables and views. With the “–lock-ddl” option disabled, Percona XtraBackup allows backups while concurrent DDL events continue […]