MySQL Cluster Manager 1.4 Release Notes
        
abort backup --backupid=backup_id cluster_name
        This command aborts a backup of cluster
        cluster_name having the ID
        backup_id specified with the
        --backupid option.
        You can obtain a list of backups and their IDs known to this
        MySQL Cluster Manager instance using the list
        backups. If the backup is not actually in progress,
        the command has no effect.