ocp_logo Installation Of Oracle 11g R1 (11.1.0.6) Real Application Cluster (RAC) Software on   CentOS EL 4 Update 5 x86
By Bhavin Hingu
This document explains the step by step process of installing Oracle 11g Real Application Cluster (RAC) with OUI.

     Installing Oracle 11g R1 (11.1.0.6) Real Application Cluster
  (RAC) Software 32-bit on CentOS EL 4 Update 5:

You MUST install this software from one node only.
I usually prefer to install the Oracle software without creating the starter database.
So, here I have selected the "Software Only" option.

Start the runInstaller command as oracle user from any one node When OUI displays the Welcome page, click Next

[oracle@node2-pub oracle]$ /mnt/cdrom/runInstaller

         Xlib: connection to ":0.0" refused by server
     Xlib: No protocol specified
                                                                                                                             
     Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.

        If you get the above error, please execute the below command as root and then start the runInstaller by connecting as oracle.

[root@node2-pub root]# xhost +
access control disabled, clients can connect from any host
[root@node2-pub root]# su - oracle
[oracle@node2-pub oracle]$ /mnt/cdrom/runInstaller
welcome screen

Click Next

2

Select "Custom" and Click Next.

3

Click Next

4

Select all the nodes and Click Next

5

Click Next

6

At this step, you should not receive any error. If you have configured the Pre-Installation
steps correctly, then you will not get any errors. I get one warning here as you can see which
is complaining about the low memory than required. I had only 512 MB ram and the required memory
is 1GB but I would not worry about this warning and will check the status box.

Click Next

7

Leave the Default values (dba, dba) and Click Next

8

Select "Install database Software Only" and Click Next

9

Click Install

10

11

Execute the mentioned script on all the nodes.

12


13

Click Exit

At this time, you need to update the .bash_profile file with the ORACLE_HOME and PATH value as shown below.
please update this file an all the nodes.

oracle@node2-pub ~]$ cat .bash_profile
# .bash_profile
 
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi
 
# User specific environment and startup programs
 
PATH=$PATH:$HOME/bin
 
unset USERNAME
 
export CRS_HOME=/u01/app/crs
export ASM_BASE=/u01/app/asm
export ASM_HOME=$ASM_BASE/product/11gr1
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/11gr1
PATH=$PATH:$CRS_HOME/bin:$ORACLE_HOME/bin
export PATH
 
# The below piece of code avoid the RAC installation error due to stty
 
if [ -t 0 ]; then
   stty intr ^C
fi
 
umask 022
[oracle@node2-pub ~]$