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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
Backup and Restore GuideThe HCL OneDB™ Backup and Restore Guide describes how to use the HCL® OneDB® ON-Bar and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
ontape backup and restore system
Configure ontapeYou configure the ontape utility by setting configuration parameters for backups of storage spaces and logical logs.
Set configuration parameters for the ontape utilityThe ontape utility uses eight configuration parameters in the onconfig file. Two of the configuration parameters specify filter programs for transforming data during backup and restore; the other six are used to create storage-space and logical-log backups.
Set the tape-device parameters
Specify tape devices as symbolic links

Specify tape devices as symbolic links

You can specify the values of LTAPEDEV and TAPEDEV as symbolic links. Using symbolic links enables you to switch to other tape or tape-compatible devices without changing the path name in the onconfig file. For example, you can specify the following symbolic link for tape device /dev/rst0:

ln -s /dev/rst0 /dbfiles/logtape

When you set the LTAPEDEV configuration parameter, as the following example shows, you can switch to a different device without changing the LTAPEDEV parameter:

LTAPEDEV /dbfiles/logtape

You only need to change the symbolic link, as the following example shows:

ln -s /usr/backups /dbfiles/logtape

A user with one tape device could redirect a logical-log back up to a disk file while using the tape device for a backup.