content_image/669403.jpg content_image/669402.jpg content_image/669405.jpg content_image/669404.jpg
that the reason for the abort was due to a request by the user. (The remaining nodes report that the backup was aborted due to an unspecified internal error.) 

<img src='content_image/669403.jpg'>

<img src='content_image/669402.jpg'>

## Note 

There is no guarantee that the cluster nodes respond to an ABORT BACKUP command in any particular order. 

The Backup backup_id  started from node management_node_id  has been aborted messages mean that the backup has been terminated and that all files relating to this backup have been removed from the cluster file system. 

It is also possible to abort a backup in progress from a system shell using this command: 

## 23.5.8.3 Configuration for NDB Cluster Backups 

shell> ndb_mgm -e "ABORT BACKUP backup_id " 

<img src='content_image/669405.jpg'>

Five configuration parameters are essential for backup: 

• BackupDataBufferSize 

The amount of memory used to buffer data before it is written to disk. 

• BackupLogBufferSize 

<img src='content_image/669404.jpg'>

## Note 

If there is no backup having the ID backup_id  running when an ABORT BACKUP  is issued, the management client makes no response, nor is it indicated in the cluster log that an invalid abort command was sent. 

The amount of memory used to buffer log records before these are written to disk. 

• BackupMemory 

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. 

• BackupWriteSize 

The default size of blocks written to disk. This applies for both the backup data buffer and the backup log buffer. 

• BackupMaxWriteSize 

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= password  as part of a START BACKUP  command. 

