A
Optimal Flexible Architecture

The Oracle9i Real Application Clusters Guard directory structure depends on the type of installation you perform when installing the software. This appendix contains the following sections:

• Introduction to Optimal Flexible Architecture

• OFA Compliant Installation

• Non-OFA Compliant Installation

Introduction to Optimal Flexible Architecture

Oracle Corporation recommends the Optimal Flexible Architecture (OFA) standard for Oracle installations. The OFA standard is a set of configuration guidelines for efficient and reliable Oracle databases that require little maintenance.

OFA provides the following benefits:

• Organizes large amounts of complicated software and data on disk to avoid device bottlenecks and poor performance

• Facilitates routine administrative tasks, such as software and data backup functions, which are often vulnerable to data corruption

• Eases switching among multiple Oracle databases

• Manages and administers database growth adequately

• Helps to eliminate fragmentation of free space in the data dictionary, isolate other fragmentation, and minimize resource contention

To switch to the OFA standard, you must modify the directory structure and relocate the database files.

See Also: See the Oracle operating-system specific documentation for more information about OFA. See the Oracle9i Administrator's Guide for information about relocating your database files.

OFA Compliant Installation

If the ORACLE_BASE environment variable is set during installation, an OFA compliant installation is performed, and the PFS_HOME environment variable is set to $ORACLE_BASE/admin/db_name/pfs.

An OFA compliant installation of Oracle9i Real Application Clusters Guard results in a directory structure similar to the following:

$ORACLE_HOME
$ORACLE_HOME/pfs
$ORACLE_HOME/pfs/admin
$ORACLE_HOME/pfs/bin
$ORACLE_HOME/pfs/bin/oracle_up
$ORACLE_HOME/pfs/bin/oracle_ping
$ORACLE_HOME/pfs/bin/oracle_lsnr
$ORACLE_HOME/pfs/bin/oracle_role
$ORACLE_HOME/pfs/bin/pfs_watchdog
$ORACLE_HOME/pfs/demo
$ORACLE_HOME/pfs/doc
$ORACLE_HOME/pfs/lib
$ORACLE_HOME/pfs/lib/pfs_cluster
$ORACLE_HOME/pfs/lib/pfs_internal
$ORACLE_HOME/pfs/lib/pfs_oracle
$ORACLE_HOME/pfs/mesg
$ORACLE_HOME/pfs/setup
$ORACLE_HOME/pfs/setup/conf
$ORACLE_HOME/pfs/setup/template
$ORACLE_HOME/pfs/setup/template/include
$ORACLE_HOME/pfs/setup/template/network
$ORACLE_HOME/pfs/setup/template/packs
$ORACLE_HOME/pfs/setup/template/pfile
$ORACLE_HOME/pfs/setup/template/user
$ORACLE_HOME/pfs/setup/output
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/packs
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/include
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/network
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/pfile
$ORACLE_HOME/pfs/sys

$ORACLE_BASE/admin/
$ORACLE_BASE/admin/db_name
$ORACLE_BASE/admin/db_name/pfs
$ORACLE_BASE/admin/db_name/pfs/include
$ORACLE_BASE/admin/db_name/pfs/packs
$ORACLE_BASE/admin/db_name/pfs/pfile
$ORACLE_BASE/admin/db_name/pfs/pfsdump
$ORACLE_BASE/admin/db_name/pfs/user

Non-OFA Compliant Installation

If the ORACLE_BASE environment variable is not set during installation, a non-OFA compliant installation is performed and the PFS_HOME environment variable is set to $ORACLE_HOME/pfs/db_name.

A non-OFA compliant installation of Oracle9i Real Application Clusters Guard results in a directory structure similar to the following:

$ORACLE_HOME
$ORACLE_HOME/pfs
$ORACLE_HOME/pfs/admin
$ORACLE_HOME/pfs/bin
$ORACLE_HOME/pfs/bin/oracle_up
$ORACLE_HOME/pfs/bin/oracle_ping
$ORACLE_HOME/pfs/bin/oracle_lsnr
$ORACLE_HOME/pfs/bin/oracle_role
$ORACLE_HOME/pfs/bin/pfs_watchdog
$ORACLE_HOME/pfs/demo
$ORACLE_HOME/pfs/doc
$ORACLE_HOME/pfs/lib
$ORACLE_HOME/pfs/lib/pfs_cluster
$ORACLE_HOME/pfs/lib/pfs_internal
$ORACLE_HOME/pfs/lib/pfs_oracle
$ORACLE_HOME/pfs/mesg
$ORACLE_HOME/pfs/setup
$ORACLE_HOME/pfs/setup/conf
$ORACLE_HOME/pfs/setup/template
$ORACLE_HOME/pfs/setup/template/include
$ORACLE_HOME/pfs/setup/template/network
$ORACLE_HOME/pfs/setup/template/packs
$ORACLE_HOME/pfs/setup/template/pfile
$ORACLE_HOME/pfs/setup/template/user
$ORACLE_HOME/pfs/setup/output
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/packs
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/include
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/network
$ORACLE_HOME/pfs/setup/output/ORACLE_SERVICE/pfile
$ORACLE_HOME/pfs/sys

$ORACLE_HOME/pfs/db_name
$ORACLE_HOME/pfs/db_name/include
$ORACLE_HOME/pfs/db_name/log
$ORACLE_HOME/pfs/db_name/packs
$ORACLE_HOME/pfs/db_name/pfile
$ORACLE_HOME/pfs/db_name/user