Split Mirror Backup: Software Configuration (SAP Library - Database Administration (Oracle) with SAPDBA)

Split Mirror Backup: Software Configuration

The ORACLE database software must be installed on the backup host. The Oracle_Home directory structure must match the SAP standard installation. This is expected by BRBACKUP.
Standard directories:

UNIX: WINDOWS NT:

$ORACLE_HOME/dbs (UNIX) %ORACLE_HOME%\DATABASE

$ORACLE_HOME/bin %ORACLE_HOME%\BIN

$SAPDATA_HOME/sapbackup %SAPDATA_HOME%\sapbackup

$SAPDATA_HOME/sapreorg %SAPDATA_HOME%\sapreorg

$SAPDATA_HOME/saparch %SAPDATA_HOME%\saparch

$SAPDATA_HOME/sapcheck %SAPDATA_HOME%\sapcheck

$SAPDATA_HOME/saptrace %SAPDATA_HOME%\saptrace

The ORACLE and BRBACKUP profiles should be available in $ORACLE_HOME/dbs or %ORACLE_HOME%\DATABASE .

The parameter backup_type in the profile init<SID>.sap must be set as follows:

backup_type = offline_split|online_split

To set up the link between the backup host and the productive host an instance string must be defined in the profile parameter primary_db (SQLNET configuration).

The directories /usr/sap/<SID>/SYS/exe/run or \\<hostname>\sapmnt\<SID>\SYS\exe\run must be available on the backup host and should at least contain the programs BRBACKUP, BRCONNECT and BRTOOLS.

The path names of all databases with access to both hosts, must be identical.

If you use a backup tool from another manufacturer, then the manufacturer must install and configure the BACKINT interface and the backup client on the backup host.

Init<SID>.sap profile parameter

backup_type backup_type = offline_split|online_split

split_cmd = " <split_cmd> [$ ] "

split_cmd is a program or shell script (with or without options) called by BRBACKUP to split the mirror disks.

resync_cmd = "<resync_cmd> [$ ]"

resync_cmd is a program or shell script called by BRBACKUP to resynchronize the mirror disks. If this parameter is not set then the resync process is not carried out under the control of BRBACKUP.
When running BRBACKUP replaces the optional character ‘$’ with the name of a file containing the names of all files to be backed up.

If the split or resync command was carried out successfully the exit code 0 only and no other output should be returned. Exception: Only messages beginning with ‘#INFO’ are acceptable, that is they are not interpreted as an error message. If a command failed a return code >0 and messages describing the cause of the error should be output.

primary_db = <inst_str>

inst_str = Instance string to the productive database, in order to connect the backup host with the productive host. The connections (alias names) are defined in the configuration file tnsnames.ora or by the user.
(This parameter was already introduced in connection with the standby DB configuration for SAP Release 3.1).

brbackup -t|type =

online_split : Online backup of the mirror disks

offline_split : Offline backup of the mirror disks

The command line option overwrites the value set in the parameter backup_type .

See also:

Initialization Profile init<DBSID>.sap