Disaster Recovery 

Use

If you lose your entire Oracle database system (possibly including hardware), and have not taken any special security precautions – such as setting up a Standby Database – then you have to recover the system as much as possible, step by step. This section describes how to begin reinstalling the system in the event of such a disaster, and how to keep data loss to a minimum by using BRRECOVER.

This section discusses how to approach disaster recovery.

For more information on how to perform disaster recovery, see Disaster Recovery with BR*Tools.

Prerequisites

·        SAP and Oracle software is correctly installed

·        The file systems – that is, sapdata<x> directories – exist and are configured as before the disaster

Integration

You can only restore profiles and log files using this function. This is a preparation step for subsequent database recovery with one of the following:

·        Database point-in-time recovery

·        Whole database reset

Features

The following graphic shows how disaster recovery works:

Activities

...

       1.      Select restore from BRBACKUP or BRARCHIVE backup.

You select the BRBACKUP or BRARCHIVE backup that contains the required profiles and logs.

       2.      Select restore device type phase

You select the device to be used from the following possibilities:

¡        Local tape

¡        Remote tape

¡        Local disk

¡        Remote disk

¡        Backup utility

       3.      Specify restore parameters phase

Depending on your choice of restore device type, you specify appropriate restore parameters

       4.      Select profiles and log files phase

You select the profiles and log files that you want to restore from the following:

¡        Backup profile

¡        Oracle profile

¡        BACKINT / mount profile – for more information, see util_par_file

¡        Detail log from one of the following:

§         BRARCHIVE Detail Log

§         BRBACKUP Detail Log

¡        Summary log from one of the following

§         BRARCHIVE Summary Log

§         BRBACKUP Summary Log

§         BRSPACE Summary Log

§         BRSPACE Structure Change Log

§         BRSPACE Parameter Change Log

       5.      Restore selected profiles and log files phase

BRRECOVER directly restores the selected profiles and log files without calling BRRESTORE.

       6.      Select detail logs for restore phase

You select the detail logs that you want to restore. You can only select logs on the selected restore device type, such as a disk or external backup tool (BACKINT). For tape device type, the details logs are determined by the mounted tape volume.

       7.      Restore selected detail logs phase

BRRECOVER directly restores the selected detail logs from the disk, tape, or external backup tool without calling BRRESTORE.