Five configuration parameters are essential for backup:
The amount of memory used to buffer data before it is written to disk.
The amount of memory used to buffer log records before these are written to disk.
The total memory allocated in a data node for backups. This should be the sum of the memory allocated for the backup data buffer and the backup log buffer.
The default size of blocks written to disk. This applies for both the backup data buffer and the backup log buffer.
The maximum size of blocks written to disk. This applies for both the backup data buffer and the backup log buffer.
In addition, CompressedBackup causes NDB to use compression when creating and writing to backup files.
More detailed information about these parameters can be found in Backup Parameters.
You can also set a location for the backup files using the BackupDataDir configuration parameter. The default is FileSystemPath/BACKUP/BACKUP-.backup_id
In NDB 8.0.22 and later, you can enforce encryption of backup files by enabling RequireEncryptedBackup. When this parameter is set to 1, backups cannot be created without specifying ENCRYPT PASSWORD= as part of a passwordSTART BACKUP command.