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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.
ON-Bar backup and restore system
Restore data with ON-BarYou can use the ON-Bar utility to restore data that was backed up by the ON-Bar utility.
onbar -r syntax: Restoring dataTo run a complete restore, use onbar -r command.
Recreating chunk files during a restoreIf the disk or file system fails, one or more chunk files might be missing from the dbspace. Use the -O option to recreate missing chunk files and any necessary directories during a restore.
Restoring when using cooked chunksYou can recreate missing cooked chunk files during a restore.

Restoring when using cooked chunks

You can recreate missing cooked chunk files during a restore.

About this task

Restriction: ON-Bar does not recreate chunk files during a logical restore if the logical logs contain chunk-creation records.

To restore when using cooked chunks:

Install the new disk.
Based on your system, perform one of the following tasks:
- On UNIX™, mount the device as a file system.
- On Windows™, format the disk.
Allocate disk space for the chunk file.
Run the onbar -r -O space command to recreate the chunk files and restore the dbspace.