•Databases can be put into backup mode

•Databases can be taken offline

•A mount point can be unmounted

For an online database backup, snapshot data alone does not suffice for a restore. The archive log files from the application client are also needed. An archive log files backup utilizing the standard Data Protector backup procedure can be started immediately after creating snapshots, when the database is taken out of backup mode.

Snapshot data of the application data is produced using the virtual disk array technologies, such as:

•HP StorageWorks Business Copy Virtual Array

•HP StorageWorks Enterprise Virtual Array

Snapshot backup types

Within the Data Protector snapshot integrations, the following types of snapshot backups are available:

•ZDB to tape

•ZDB to disk

•ZDB to disk+tape

ZDB to tape and ZDB to disk+tape

During ZDB-to-tape and ZDB-to-disk+tape sessions, a point-in-time snapshot data of the application data is streamed to a tape device, which is connected to a separate backup system, using Data Protector Disk Agent and General Media Agent, with minimal impact on the application system. After the backup is completed, the snapshot data is either:

•discarded - ZDB to tape

•retained and can be used for instant recovery - ZDB to disk+tape

ZDB to disk

During a ZDB-to-disk session, the same standard snapshot technology is used as in ZDB to tape and ZDB to disk+tape, however, the snapshot data is not streamed to a backup medium (tape device) from the snapshot copy and is retained on a disk array. It can be used for instant recovery. The session effectively ends after the snapshot data is created.

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Snapshot concepts