HP OpenView Storage B6960-96008 manual Offline redo log See archived redo log, Online backup

Glossary

standalone and SCSI library devices can be used for offline recovery. Recovery of the Cell Manager is always offline.

offline redo log

See archived redo log

On-Bar(Informix Server specific term) A backup and restore system for Informix Server. ON-Bar enables you to create a copy of your Informix Server data and later restore the data. The ON- Bar backup and restore system involves the following components:

•the onbar command

•Data Protector as the backup solution

•the XBSA interface

•ON-Bar catalog tables, which are used to back up dbobjects and track instances of dbobjects through multiple backups.

ONCONFIG (Informix Server specific term)

An environment variable that specifies the name of the active ONCONFIG configuration file. If the ONCONFIG environment variable is not present, Informix Server uses the configuration values from the onconfig file in the

directory <INFORMIXDIR>\etc (on Windows) or <INFORMIXDIR>/etc/ (on UNIX).

online backup

A backup performed while a database application remains available for use. The database is placed into a special backup mode of operation for the time period that the backup application requires access to the original data objects. During this period, the database is fully operational, but there may be a small performance impact and log files may grow very quickly.

•For simple backup methods (non ZDB), backup mode is required for the whole backup period (~minutes/ hours). For instance, for backup to tape, until streaming of data to tape is finished.

•For ZDB methods, backup mode is required for the short period of the data replication process only (~seconds). Normal database operation can then be resumed for the rest of the backup process.

In some cases, transaction logs may also have to be backed up to allow a consistent database to be restored.

See also zero downtime backup (ZDB) and offline backup.

G-31