An article explaining the installation method of rac oracle in detail

In Oracle database management, RAC (Real Application Cluster) is a very practical technology. It allows multiple Oracle instances to run on different servers at the same time to achieve high availability and load balancing. However, the installation process of RAC is more complicated than that of a single-node database. This article will introduce you to the detailed steps of RAC Oracle installation.

1. Confirm server hardware and software requirements

Before installing RAC, you need to confirm the server hardware and software requirements through Oracle official documents to ensure that RAC can run on in the system. The main hardware requirements are as follows:

• Requires at least two servers, each server has two or more available network cards
• The server needs to be connected to a shared disk array
• The operating system needs to support Cluster Synchronization Service

The main software requirements are as follows:

• Oracle database installation media
• Required on all servers Install Grid Infrastructure software
• Oracle database software needs to be installed on all servers

2. Install Grid Infrastructure software

Before installing the Oracle database, you need to Install the Grid Infrastructure software first. Grid Infrastructure is the core component of Oracle Database and is used to manage database instances and cluster resources. Before installing the Grid Infrastructure software, the following steps are required:

• Ensure the server meets Oracle's hardware and software requirements
• Ensure the Oracle database media is available and uncompressed
• Determine the Grid Infrastructure version and platform to be installed (32-bit or 64-bit)

Next, let’s take a look at the installation process of Grid Infrastructure software (taking Oracle 11gR2 as an example):

• Run the installer (./runInstaller)
• On the "Select installation type" page, select "Install and Configure Grid Infrastructure for a Cluster"
• On the "Select installation Options" page, select "Install and Configure Oracle Grid Infrastructure for a Cluster"
• On the "Select Installation Type" page, "Create a new host" (select "Create a New Cluster")
• On the "Node Selection" page, add all servers that need to install Grid Infrastructure, and then click Next
• On the "Cluster Node Health Status" page, confirm that all nodes can be pinged. Then click Next
• On the "Grid Infrastructure Software Location" page, select the installation path of Grid Infrastructure and the location of OCR and Voting Disk, and then click Next
• In the "Configure ASM Disk Group " page, allocate partitions for the shared disk and create an ASM disk group, and then click Next
• On the "Target Node Configuration" page, configure the Grid Infrastructure parameters on each node, such as listeners, ASM Instances, etc.
• On the "Cluster Installation Specific Checks" page, check whether the installation requirements for the Grid Infrastructure software are met

3. Install the Oracle database software

After installing the Grid Infrastructure software, you need to install the Oracle database software. Oracle database software includes components such as Oracle instances and Oracle database managers. Before installing the Oracle database software, you need to perform the following steps:

• Ensure that the Grid Infrastructure has been correctly installed and configured
• Confirm that the Oracle database media is available and has been decompressed
• Determine the Oracle database version and platform to be installed (32-bit or 64-bit)

Next, let’s take a look at the installation process of Oracle database software (taking Oracle 11gR2 as an example):

• Run the installer (./runInstaller)
• On the "Select Installation Type" page, select "Install Database Software Only"
• On the "Select Installation Options" page On the "Single Instance Database Installation"
• On the "Product Language Selection" page, select the installation language
• On the "Database Edition Selection" page, select "Enterprise Edition" or "Standard Edition" and click Next
• On the "Oracle Software Location" page, select the installation path of the Oracle software, and then click Next
• On the "Configure Operating System Group" page, select The Oracle database manager operating system group to be used
• On the "Installation Options Check" page, check whether the installation requirements for the Oracle database software are met
• On the "Installation Progress" page, wait The installation program is completed

After installing the Oracle database software, you can create an Oracle instance and configure it so that the final RAC cluster can run normally.

Summary

The RAC Oracle installation process is somewhat more complex than a single-node database. However, as long as you follow the requirements and steps of the official documentation, you can successfully install and configure the RAC cluster to achieve high availability and load balancing of the database. I hope the illustrated steps in this article can help Oracle database administrators who are not familiar with RAC installation.

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