oracle rac 11g installation

Oracle RAC (Real Application Clusters) is a high availability and scalability solution in Oracle database architecture. Oracle RAC can integrate multiple physical servers into a logical server to provide high availability and scalability of database services. In this article, I will explain how to install Oracle RAC 11g.

1. Preparation work

Before installing Oracle RAC 11g, you need to do some preparation work. First, you need to make sure that the required hardware and software meet the system requirements. Secondly, you need to select the Oracle RAC 11g version that suits your environment and download it. Finally, you need to create a virtual IP address bound to your computer and install Grid Infrastructure for each node.

2. Install Grid Infrastructure

Grid Infrastructure is a component of Oracle RAC 11g, which provides management of Oracle database instances, Oracle ASM instances, and other resources related to Oracle RAC function. Before proceeding with Oracle RAC 11g installation, you need to install Grid Infrastructure first.

Before starting the installation, you need to ensure that each node can access the disks on all other nodes. You also need to check that the hostname is resolved correctly and you can connect via the hostname. Finally, you need to create a dedicated user in the system and grant this user administrator rights.

Installing Grid Infrastructure can be done through Oracle Universal Installer (OUI). First, you need to copy the Grid Infrastructure installer to each node and run the installer on each node.

In OUI, you need to select the "Install and Configure Grid Infrastructure for a Cluster" option and follow the instructions to prepare, install and configure.

3. Installing Oracle RAC 11g

After installing Grid Infrastructure, you can start installing Oracle RAC 11g. As with Grid Infrastructure installation, you need to copy the Oracle RAC 11g installer to each node and run the installer on each node.

In the OUI, select the "Install Database Software Only" option and follow the instructions to prepare, install, and configure.

When configuring the database, you need to select the "Oracle Real Application Clusters database" option. You also need to enter information such as database name, listener port, virtual IP address, etc. Finally, you need to select the desired database options (e.g., install Oracle Text, Oracle XML DB, etc.).

4. Complete Installation

After installing Oracle RAC 11g, you need to run the Database Configuration Assistant (DBCA) to create a database instance. In DBCA, you need to select the database along with the required options and follow the instructions to complete the operation.

After completing the installation, you need to test whether your Oracle RAC 11g cluster is working properly. You can use SQL*Plus or other Oracle management tools to connect to the database and run some simple queries to verify that everything is working properly.

Summary

Oracle RAC 11g is a powerful database architecture that can provide high availability and scalability. Installing Oracle RAC 11g requires some preparation, including checking system requirements, selecting a version, and creating a virtual IP address. You also need to install Grid Infrastructure and choose to install Oracle RAC 11g in the OUI. Finally, you need to create a database instance using DBCA and test whether your Oracle RAC 11g cluster is working properly.

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