Backup options

On this screen, specify the database backup options.

The Database user access choices help you specify the state of the database during the backup.

If you choose to Perform the backup while users are connected and transaction logs are enabled, a "hot" or online backup is performed. This option allows the backup to proceed while users execute transactions. This option is equivalent to the ONLINE option of the DB2 BACKUP command.

If this option is selected and DB2 is not configured for online backups, then an offline backup is attempted.

The Disconnect users and prohibit access during the backup works with the DB2 database version is 8.1 or later. If you choose this option and have an appropriate DB2 version, NetBackup terminates all connections to the database are before it performs the backup. This setting is equivalent to the DB2 QUIESCE DATABASE command.

If the database version is earlier than 8.1, this option has no effect, and NetBackup attempts an offline backup.

To enforce an offline backup, you can choose to Abort the backup if users are connected. If you select this option, NetBackup attempts a "cold" or offline backup. The backup fails if any users are connected.

In the Backup performance box, specify the parameters for the backup. The fields in this box require either a default value or an entered value to continue.

For Sessions, enter a value from 1 to 32. This value specifies the number of sessions or backup streams for the backup.

For Parallelism, enter a value from 1 to 1024. This value specifies the number of DB2 concurrent processes that are used to read tablespaces.

For Buffers, enter a value from 2 to 16384. The minimum value for this parameter should be equal to twice the value that you specified in the Sessions field.

For Buffer Size, enter a value from 8 to 524228. The value is the number of 4-KB pages that are used to buffer data. The total buffer size is the buffer value multiplied by 4096.

The Back button takes you back to the Initial Settings screen. Click Back only if you want to reset the Backup Options to the default settings or to the settings of an existing template. All entries on the Backup Options screen are reset if you click Back.

Click Next to continue.