Learn how to set up and configure an Oracle rac 10




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Partitioning
The installer will then allow you to view (and modify if needed) the disk partitions it automatically selected. In almost all cases, the installer will choose 100MB for /boot, double the amount of RAM for swap, and the rest going to the root (/) partition. I like to have a minimum of 1GB for swap. For the purpose of this install, I will accept all automatically preferred sizes. (Including 2GB for swap since I have 1GB of RAM installed.)

Boot Loader Configuration
The installer will use the GRUB boot loader by default. To use the GRUB boot loader, accept all default values and click [Next] to continue.

Network Configuration
I made sure to install both NIC interfaces (cards) in each of the Linux machines before starting the operating system installation. This screen should have successfully detected each of the network devices.

First, make sure that each of the network devices are checked to [Active on boot]. The installer may choose to not activate eth1.

Second, [Edit] both eth0 and eth1 as follows. You may choose to use different IP addresses for both eth0 and eth1 and that is OK. If possible, try to put eth1 (the interconnect) on a different subnet then eth0 (the public network):

eth0:
- Check off the option to [Configure using DHCP]
- Leave the [Activate on boot] checked
- IP Address: 192.168.1.100
- Netmask: 255.255.255.0

eth1:
- Check off the option to [Configure using DHCP]
- Leave the [Activate on boot] checked
- IP Address: 192.168.2.100
- Netmask: 255.255.255.0

Continue by setting your hostname manually. I used "linux1" for the first node and "linux2" for the second one. Finish this dialog off by supplying your gateway and DNS servers.

Firewall
On this screen, make sure to check [No firewall] and click [Next] to continue.

Additional Language Support/Time Zone
The next two screens allow you to select additional language support and time zone information. In almost all cases, you can accept the defaults.

Set Root Password
Select a root password and click [Next] to continue.

Package Group Selection
Scroll down to the bottom of this screen and select [Everything] under the "Miscellaneous" section. Click [Next] to continue.

About to Install
This screen is basically a confirmation screen. Click [Next] to start the installation. During the installation process, you will be asked to switch disks to Disk #2 and then Disk #3.

Graphical Interface (X) Configuration
When the installation is complete, the installer will attempt to detect your video hardware. Ensure that the installer has detected and selected the correct video hardware (graphics card and monitor) to properly use the X Windows server.

You will continue with the X configuration in the next three screens.

Congratulations
And that's it. You have successfully installed WBEL on the first node (linux1). The installer will eject the CD from the CD-ROM drive. Take out the CD and click [Exit] to reboot the system.

When the system boots into Linux for the first time, it will prompt you with another Welcome screen. (No one ever said Linux wasn't friendly!) The following wizard allows you to configure the date and time, add any additional users, testing the sound card, and to install any additional CDs. The only screen I care about is the time and date. As for the others, simply run through them as there is nothing additional that needs to be installed (at this point anyways!). If everything was successful, you should now be presented with the login screen.

Perform the same installation on the second node
After completing the Linux installation on the first node, repeat the above steps for the second node (linux2). When configuring the machine name and networking, ensure to configure the proper values. For my installation, this is what I configured for linux2:

First, make sure that each of the network devices are checked to [Active on boot]. The installer will choose not to activate eth1.

Second, [Edit] both eth0 and eth1 as follows:

eth0:
- Check off the option to [Configure using DHCP]
- Leave the [Activate on boot] checked
- IP Address: 192.168.1.101
- Netmask: 255.255.255.0

eth1:
- Check off the option to [Configure using DHCP]
- Leave the [Activate on boot] checked
- IP Address: 192.168.2.101
- Netmask: 255.255.255.0

Continue by setting your hostname manually. I used "linux2" for the second node. Finish this dialog off by supplying your gateway and DNS servers.

7. Configure Network Settings

Perform the following network configuration on all nodes in the cluster!

Note: Although we configured several of the network settings during the Linux installation, it is important to not skip this section as it contains critical steps that are required for the RAC environment.

Introduction to Network Settings

During the Linux O/S install we already configured the IP address and host name for each of the nodes. We now need to configure the /etc/hosts file as well as adjust several of the network settings for the interconnect. I also include instructions for enabling Telnet and FTP services.

Each node should have one static IP address for the public network and one static IP address for the private cluster interconnect. The private interconnect should only be used by Oracle to transfer Cluster Manager and Cache Fusion related data. Although it is possible to use the public network for the interconnect, this is not recommended as it may cause degraded database performance (reducing the amount of bandwidth for Cache Fusion and Cluster Manager traffic). For a production RAC implementation, the interconnect should be at least gigabit or more and only be used by Oracle.

Configuring Public and Private Network

In our two-node example, we need to configure the network on both nodes for access to the public network as well as their private interconnect.

The easiest way to configure network settings in Red Hat Enterprise Linux 3 is with the Network Configuration program. This application can be started from the command-line as the root user account as follows:

# su -

# /usr/bin/redhat-config-network &

Do not use DHCP naming for the public IP address or the interconnects - we need static IP addresses!

Using the Network Configuration application, you need to configure both NIC devices as well as the /etc/hosts file. Both of these tasks can be completed using the Network Configuration GUI. Notice that the /etc/hosts settings are the same for both nodes.

Our example configuration will use the following settings:

Server 1 (linux1)

Device

IP Address

Subnet

Purpose

eth0

192.168.1.100

255.255.255.0

Connects linux1 to the public network

eth1

192.168.2.100

255.255.255.0

Connects linux1 (interconnect) to linux2 (int-linux2)

/etc/hosts

127.0.0.1 localhost loopback
# Public Network - (eth0)

192.168.1.100 linux1

192.168.1.101 linux2
# Private Interconnect - (eth1)

192.168.2.100 int-linux1

192.168.2.101 int-linux2
# Public Virtual IP (VIP) addresses for - (eth0)

192.168.1.200 vip-linux1

192.168.1.201 vip-linux2




Server 2 (linux2)

Device

IP Address

Subnet

Purpose

eth0

192.168.1.101

255.255.255.0

Connects linux2 to the public network

eth1

192.168.2.101

255.255.255.0

Connects linux2 (interconnect) to linux1 (int-linux1)

/etc/hosts

127.0.0.1 localhost loopback
# Public Network - (eth0)

192.168.1.100 linux1

192.168.1.101 linux2
# Private Interconnect - (eth1)

192.168.2.100 int-linux1

192.168.2.101 int-linux2
# Public Virtual IP (VIP) addresses for - (eth0)

192.168.1.200 vip-linux1

192.168.1.201 vip-linux2
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