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Create the Required Directories using the Optimal Flexible Architecture (OFA) Standard

Create the Required Directories using the Optimal Flexible Architecture (OFA) Standard 

The Optimal Flexible Architecture (OFA) standard is a set of file naming recommendations for managing Oracle installations. The Optimal Flexible Architecture standard offers mount point, directory, and file-naming conventions that work with the Oracle Universal Installer. The Optimal Flexible Architecture includes where to install each part of each Oracle product including the storage of the applications and the data.
 
To create the directories for Oracle software installation using the Optimal Flexible Architecture standard, as root, type the following:
# mkdir -p /u01/app/oracle/product/
# chown -R oracle:oinstall /u01
# chmod -R 775 /u01
 

Adjust the Shared Memory File System for the Database Host

To meet the Oracle Management Repository configuration requirements, the shared memory file system size should be increased to 4 GB.

Note: The shared memory file system size needs to be increased only on the Database host.

To check the current size of the shared memory file system, type “df -k /dev/shm” as shown in the next example.

# df -k /dev/shm
Filesystem           1K-blocks      Used Available Use% Mounted on
tmpfs                  3056052         0   3056052   0% /dev/shm

The above examples shows a 3 GB shared memory file system.

To set the shared memory file system size to 4 GB, as root, type the following commands.
# umount tmpfs
# mount -t tmpfs shmfs -o size=4g /dev/shm

Next, add the following entry in /etc/fstab to automatically mount the 4 GB shared memory file system.
tmpfs        /dev/shm        tmpfs    size=4g        0 0
 

Oracle Database 12c Release 1 Enterprise Edition (12.1.0.1.0) Installation Prerequisites

Before starting the Oracle Database 12c Release 1 and 2 installation, it is necessary to meet several database, and operating system prerequisites, as well as to download and stage the software.

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