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
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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 (DB_HOME):
Lets Install RAC bineries for ORACLE_HOME.
set ORACLE_BASE to /u01/app/oracle for this installation.
Start the runInstaller command as oracle user from any one node When OUI displays the Welcome page, click Next

[oracle@node1-pub ~]$ export ORACLE_BASE=/u01/app/oracle
[oracle@node1-pub ~]$ 11g_database/database/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@node1-pub ~]# xhost +
access control disabled, clients can connect from any host
[root@node1-pub ~]# su - oracle
[oracle@node1-pub ~]$ 11g_database/database/runInstaller
welcome screen

Click Next

2

Select "Custom" and Click Next.

3

Click Next

4

Select all the nodes and Click Next

5

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

6


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 RAC nodes.

oracle@node1-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@node1-pub ~]$

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