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You can manage up to 16 parallel instances of the Oracle Real Application Cluster (RAC) with BR*Tools. You normally start these tools only on the dedicated database (DDB) instance, as defined in SAP Note 621293.

Prerequisites

  • Check the requirements in Oracle Real Application Cluster (RAC).

  • The necessary BR*Tools executables must exist on the DDB instance host in directory /usr/sap/<SAPSID>/SYS/exe/run.

  • A common spfile must exist on the DDB instance host in directory <ORACLE_HOME>/dbs (UNIX) or <ORACLE_HOME>\database (Windows).

    spfile.ora contains all instance-independent and all instance-dependent parameters for all Oracle instances. For more information, see SAP Note 830982.

  • The backup devices (tape units or hard disks) are normally connected locally to the DDB instance host.

  • The init<DBSID>.sap profile parameter parallel_instances contains all Oracle instances, including the local instance.

  • The log directories for BR*Tools saparch, sapbackup, sapcheck, and sapreorg are all on shared file systems.

  • The Oracle archive directory, oraarch, is on a shared file system

  • The following directories are on a shared file system:

    • Oracle profile directory:

      UNIX: <ORACLE_HOME>/dbs

      Windows: <ORACLE_HOME>\database

    • Trace directory: saptrace

    • Audit directory: ~/rdbms/audit

    • The entire <ORACLE_HOME> directory, if possible

  • The Oracle SQL*Net configuration corresponds to the recommendations in SAP Note 830982.

  • UNIX only: BR*Tools requires as standard an Oracle password file for the remote connection. For more information, see SAP Note 131610.

Activities

If you have set up the user SYSTEM correctly, it now has the authorization to start and stop the database instances remotely. Therefore, you can call BRBACKUP and BRARCHIVE as usual, for example:

brbackup -u system/<password>...

brarchive -u system/<password>...