Change the Kernel Parameters
Add or amend the following lines to the “/etc/sysctl.conf” file.

 fs.aio-max-nr = 1048576

fs.file-max = 6815744

kernel.shmall = 2097152

kernel.shmmax = 1054504960

kernel.shmmni = 4096

# semaphores: semmsl, semmns, semopm, semmni

kernel.sem = 250 32000 100 128

net.ipv4.ip_local_port_range = 9000 65500

net.core.rmem_default=262144

net.core.rmem_max=4194304

net.core.wmem_default=262144

net.core.wmem_max=1048586

Run the following command to change the current kernel parameters.

#/sbin/sysctl -p

Add the following lines to the “/etc/security/limits.conf” file.

oracle               soft    nproc   2047
oracle               hard    nproc   16384
oracle               soft    nofile  1024
oracle               hard    nofile  65536

Add the following lines to the “/etc/pam.d/login” file, if it does not already exist.

session    required     pam_limits.so

Change the setting of SELinux to permissive by editing the “/etc/selinux/config” file, making sure the SELINUX flag is set as follows.

SELINUX=permissive

Check the firewall service is running or not .

# service iptables stop
# chkconfig iptables off

Either configure NTP, or make sure it is not configured so the Oracle Cluster Time Synchronization Service (ctssd) can synchronize the times of the RAC nodes. If you want to deconfigure NTP do the following.

# service ntpd stop
Shutting down ntpd:                                        [  OK  ]
# chkconfig ntpd off
# mv /etc/ntp.conf /etc/ntp.conf.orig
# rm /var/run/ntpd.pid

If you want to use NTP, you must add the “-x” option into the following line in the “/etc/sysconfig/ntpd” file.

OPTIONS="-x -u ntp:ntp -p /var/run/ntpd.pid"

Then restart NTP.

# service ntpd restart

Create User and Groups for oracle

Create the directories on both nodes in which the Oracle software will be installed.

mkdir -p  /u01/app/11.2.0/grid
mkdir -p /u01/app/oracle/product/11.2.0/db_1
chown -R oracle:oinstall /u01
chmod -R 775 /u01/

Create a file called “/home/oracle/grid_env” with the following contents.

Install the following package from the Oracle grid media after you’ve defined groups.

#cd /u01/Soft/grid/rpm
#rpm -Uvh cvuqdisk*

Create  Disks for RAC installation

A general pictorial guide for how to install and configure SAN for RAC using OPENFILER

 

Internal Storage Details

Mount Point	Capacity
	Node1	Node 2
/ root	20	20
/ swap	4 GB	4 GB

 

External Storage Details

Type	Size	LUNs Qty.
Voting disk
OCR	6	3
Flash back recovery	50	1
DATA	100	1

 

 

Installation of Oracle ASM 

Instance 1:

 

 

We have 2.6.18-164 so have to download the appropriate ASMLib RPMs from  Link

Configure the iSCSI (initiator) service

Now that the iSCSI service is started, use the iscsiadm command-line interface to discover all available targets on the network storage server. This should be performed on both Oracle RAC nodes to verify the configuration is functioning properly:

Manually Log In to iSCSI Targets
At this point the iSCSI initiator service has been started and each of the Oracle RAC nodes were able to discover the available targets from the network storage server. The next step is to manually log in to each of the available targets which can be done using the iscsiadm command-line interface. This needs to be run on both Oracle RAC nodes. Note that I had to specify the IP address and not the host name of the network storage server ( openfiler1-priv) – I believe this is required given the discovery (above) shows the targets using the IP address.

Configure Automatic Log In
The next step is to ensure the client will automatically log in to each of the targets listed above when the machine is booted (or the iSCSI initiator service is started/restarted). As with the manual log in process described above, perform the following on both Oracle RAC nodes:

(cd /dev/disk/by-path; ls -l *openfiler* | awk '{FS=" "; print $9 " " $10 " " $11}')

Follow the same steps to discover the disk on second node

Follow the steps to partion  the Disks using fdisk

 

Setting SSH for Grid Installation

 

Testcase from Node1:

Test case from Node 2:

Node 2:

Grid Installation:

 

 

ASMCA Configuration: