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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.
Overview of backup and restoreThese topics provide an overview of backup and restore concepts. They also provide information about planning for backup and restore operations.
Backup and restore conceptsHCL OneDB™ provides two utilities for backing up and restoring database server data. Both utilities back up and restore storage spaces and logical logs. However, they support different features and it is important to know the differences. These topics explain basic backup and restore concepts for HCL® OneDB® database servers and compares the ON-Bar and ontape utilities.
Recovery systemA recovery system, which includes backup and restore systems, enables you to back up your database server data and later restore it if your current data becomes corrupted or inaccessible.
Logical-log backupA logical-log backup is a copy to disk or tape of all full logical-log files. The logical-log files store a record of database server activity that occurs between backups.

Logical-log backup

A logical-log backup is a copy to disk or tape of all full logical-log files. The logical-log files store a record of database server activity that occurs between backups.

To free full logical-log files, back them up. The database server reuses the freed logical-log files for recording new transactions. For a complete description of the logical log, see your HCL OneDB™ Administrator's Guide.

Restriction: Even if you do not specify logging for databases or tables, you need to back up the logical logs because they contain administrative information such as checkpoint records and additions and deletions of chunks. When you back up these logical-log files, you can do warm restores even when you do not use logging for any of your databases.