Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 6 - Install, Configure and Database Creation

Cluster Ready Services

In order to install the CRS, you have to ensure that the nodes have user equivalence. Use rsh or rlogin to test the user equivalence for the account you would use to install. Usually 'oracle' is the UNIX user account that is used for installation.

In addition to the host machine's public internet protocol (IP) address, obtain two or more IP addresses for each node that is going to be part of your installation for the purpose of VIP. One of the IP addresses must be a public IP address and another for the node's virtual IP address (VIP). Oracle uses VIPs for client-to-database connections. Therefore, the VIP address must be publicly accessible. The other address must be a private IP address for inter node, or instance-to-instance Cache Fusion traffic. Using public interfaces for Cache Fusion can cause performance problems.

In case of Sun Clusters, you need to install the Oracle-provided UDLM patch onto each node. You need to install the UDLM patch before you install Cluster Ready Services. Even if you have a pre-Oracle Database 10g UDLM, you need to install the Oracle Database 10g UDLM.

CRS Installation

To explain the CRS installation process, we will take an example where we will install CRS on a 3 Node Linux Cluster, which is fitted with polyserve cluster file system.