Oracle RAC (Real Application Clusters) is a cluster solution provided by Oracle to achieve scalable and high availability. I believe many people have learned about Oracle RAC, but the installation process may be complicated. This article will take you to learn more about the installation process of Oracle RAC 11g.

Part 1 Preparation work

Before installing Oracle RAC 11g, you first need to complete some preparation work, as follows:

1. Operating system configuration

In order to ensure the normal operation of Oracle RAC, we need to make some settings on the operating system. The specific content that needs to be set includes:

• Login user: First, you need to create two Linux accounts (e.g. oracle and grid). The oracle account will be used to install and run Oracle software, while the grid account will be used to install and run the Oracle software. Used to implement cluster control.
• Virtual IP address: The virtual IP address is an important part of Oracle RAC for load balancing, so it needs to be prepared in advance, usually through the Linux network configuration file.
• Disk partition: In order to achieve data sharing with Oracle RAC, a shared disk partition needs to be configured in the storage system and mounted on each node.

2. Installing software packages

Before installing Oracle RAC 11g, you need to install some necessary software packages, as follows:

• rpm package: Oracle needs to rely on a large number of rpm packages for installation and use, so it needs to be installed in advance.
• gcc package: Oracle also needs to rely on the gcc development package, so it also needs to be installed in advance.

In addition, you need to install some additional software packages, including:

• Install CVU (Cluster Verification Utility): CVU is used to check whether the Oracle RAC cluster environment meets The required tools need to be installed in advance.
• Install SSH: SSH needs to be used for communication between nodes during the Oracle installation process, so SSH needs to be installed in advance.

Part 2 Install Oracle Grid Infrastructure

Oracle Grid Infrastructure is an important part of Oracle RAC, which includes Oracle Clusterware and Oracle ASM. The following are the installation steps of Oracle Grid Infrastructure:

1. Extract the installation package

First you need to decompress the installation package of Oracle Grid Infrastructure to the specified directory, for example:

#?mkdir?/u01/app/oracle/product/grid
#?unzip?linux.x64_11gR2_grid.zip?-d?/u01/app/oracle/product/grid

2. Create accounts and groups

Before installing Oracle Grid Infrastructure, you need to add the oracle and grid accounts to the oinstall, dba and oper user groups. To facilitate permission control during the installation process.

#?groupadd?oinstall
#?groupadd?dba
#?groupadd?oper
#?useradd?-g?oinstall?-G?dba,oper?oracle
#?useradd?-g?oinstall?-G?dba,oper?grid

3. Execute the installation file

Execute the grid/runInstall.sh file to enter the Oracle Grid Infrastructure installation wizard interface. The specific steps are as follows:

• Select the language
• Select the Grid Infrastructure installation type
• Check the system settings
• Set the Grid installation directory and Oracle Base
• Select the type of ASM instance to be configured
• Check the ASM disk partition
• Configure the ASM instance
• Configure node information
• Configure the agent
• Check the installation startup conditions
• Start the installation

4. Perform installation verification

After the installation of Oracle Grid Infrastructure is completed, you need to Installation verification. You can verify it through the following steps:

• Check whether the cluster environment is normal: You can check it through the cvu tool.
• Check the running status of Oracle Grid Infrastructure: You can check it through the crsctl tool.
• Check whether the ASM instance is running normally: You can check it through the asmca tool.

Part 3 Install Oracle RDBMS

Oracle RDBMS is the core component of Oracle RAC. The following are the installation steps of Oracle RDBMS:

1. Extract the installation package

First unzip the Oracle RDBMS installation package to the specified directory, such as:

#?mkdir?/u01/app/oracle/product/11.2.0/dbhome_1
#?unzip?p10404530_112030_Linux-x86-64_1of7.zip?-d?/u01/app/oracle/product/11.2.0/dbhome_1
#?unzip?p10404530_112030_Linux-x86-64_2of7.zip?-d?/u01/app/oracle/product/11.2.0/dbhome_1

2. Create accounts and groups

While performing Oracle Before installing the RDBMS, you need to add the oracle and grid accounts to the oinstall, dba, and oper user groups to facilitate permission control during the installation process.

#?groupadd?oinstall
#?groupadd?dba
#?groupadd?oper
#?useradd?-g?oinstall?-G?dba,oper?oracle
#?useradd?-g?oinstall?-G?dba,oper?grid

3. Execute the installation file

Execute the database/runInstaller file to enter the Oracle RDBMS installation wizard interface. The specific steps are as follows:

• Select the language
• Check the system settings
• Set the Oracle RDBMS installation directory and Oracle Base
• Select the installation type
• Check the installation startup conditions
• Start the installation

4. Perform installation verification

After the installation of Oracle RDBMS is completed, you need to perform Installation verification. It can be verified through the following steps:

• Check the running status of Oracle RDBMS: It can be checked through the sqlplus tool.
• Check the running status of the RAC database: You can check it through the crsctl tool.

Part 4 Summary

The installation process of Oracle RAC 11g is relatively complicated, but as long as you follow the above steps, you can successfully complete the installation. During the installation process, you need to pay attention to some details, such as operating system settings, necessary software package installation, account and group creation, etc. These details have an important impact on the operating status of the Oracle RAC cluster, and therefore cannot be ignored.

In short, through the steps introduced in this article, you can easily complete the installation of Oracle RAC 11g and implement a scalable and highly available cluster solution.

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