HP Data Protector A.06.11 Integration Manual page 43

See the HP Data Protector zero downtime backup concepts guide for a general
description of ZDB and instant recovery concepts.
See the HP Data Protector zero downtime backup administrator's guide for a general
description of the ZDB-to-disk, ZDB-to-tape, and ZDB-to-disk+tape session flows and
for the explanation of actions triggered by ZDB options.
This section provides only the information relevant to the Data Protector Oracle ZDB
integration.
Operations on a replica (mounting, activating volume/disk groups,...) described
below are dependent on or triggered by ZDB options. See the HP Data Protector
zero downtime backup administrator's guide for more information on these options.
• Data Protector executes the ob2rman.pl command on the backup system. This
command retrieves a list of files or raw disks to be backed up from the Oracle
database on the application system and starts the resolving process. The list is
used only to determine the source volumes to be replicated. If the location for
control file copy is specified during configuration, ob2rman.pl makes a copy
of the control file to the specified directory on the application system. This directory
has to reside on a disk array source volume.
• When performing an online ZDB session, ob2rman.pl then sets the Oracle
target database into backup mode by issuing the sqlplus command "ALTER
TABLESPACE BEGIN BACKUP", starts the procedure to create a replica of the
source volumes on which the database is installed; and after the replica is created,
takes the database out of backup mode by issuing the sqlplus command
"ALTER TABLESPACE END BACKUP".
When performing an offline ZDB session, ob2rman.pl shuts down the Oracle
database, starts the procedure to create a replica of the source volumes on which
the database is installed; and after the replica is created, starts the Oracle
database.
• Ob2rman.pl then starts the procedure to prepare the replica on the backup
system. In this step, volume/disk groups on the backup system are enabled and,
unless the database is installed on raw partitions, the mount points with the Oracle
database files are mounted.
• A ZDB Agent then mounts the database on the backup system to the mount points
with the same names (created by Data Protector) as on the application system.
NOTE:
There must be nothing already mounted on the mount point concerned on the
backup client, or the resolving and backup will fail.
Zero downtime backup integration guide 43