Oracle RAC 26ai Project

This is a simple Oracle project created to practice and learn how to install and configure Oracle Real Application Clusters (RAC) 26ai on Oracle Linux.

The project demonstrates the main steps required to prepare the operating system, configure the RAC environment, install Oracle Grid Infrastructure, configure ASM and create an Oracle RAC database.

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Technologies

• Oracle Database 26ai
• Oracle RAC
• Oracle Grid Infrastructure
• Oracle Clusterware
• Oracle ASM
• Oracle Linux
• Linux Shell
• SSH
• DNS / SCAN
• Shared Storage

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Project Structure

Steps_Of_How_To_Build_Oracle_RAC_26ai/
│
├── Install_Oracle_RAC_26ai_On_Oracle_Linux/
│   └── Oracle RAC 26ai installation steps
│
├── CREATE_FILES_WITH_PERMISSIONS_FOR_ROOT_USER_GRID_ORACLE_USERS.txt
│   └── Files, permissions and ownership
│
└── README.md

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What This Project Does

The basic process is:

Oracle Linux
     ↓
Operating System Configuration
     ↓
Users and Groups
     ↓
Network Configuration
     ↓
SSH Configuration
     ↓
Shared Storage
     ↓
Oracle Grid Infrastructure
     ↓
Oracle ASM
     ↓
Oracle RAC Database
     ↓
Cluster Validation

The project provides step-by-step instructions for preparing Oracle Linux and building an Oracle RAC 26ai environment.

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What I Learned

While working on this project I practiced:

• Installing Oracle RAC
• Preparing Oracle Linux for Oracle RAC
• Creating Oracle users and groups
• Configuring RAC networking
• Configuring SSH between RAC nodes
• Installing Oracle Grid Infrastructure
• Working with Oracle Clusterware
• Working with Oracle ASM
• Configuring shared storage
• Creating an Oracle RAC database
• Checking RAC cluster resources
• Troubleshooting Oracle RAC installation
• Using Oracle RAC administration commands

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Oracle RAC Components

The project covers the main Oracle RAC components:

Component	Description
Grid Infrastructure	Provides the cluster infrastructure
Oracle Clusterware	Manages the RAC cluster and resources
Oracle ASM	Manages shared database storage
Oracle RAC Database	Provides the clustered database environment
SCAN / VIP	Provides RAC network connectivity

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Useful Commands

Check Cluster Status

crsctl check cluster -all

Check Cluster Resources

crsctl status resource -t

Check ASM Disk Groups

asmcmd lsdg

Check Database Status

srvctl status database

Check RAC Instances

srvctl status instance

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Requirements

To run or follow this project you need:

• Oracle Linux
• Oracle Database 26ai
• Oracle Grid Infrastructure
• At least two RAC nodes
• Shared storage
• Network connectivity between the nodes
• DNS or hostname resolution
• Root access
• Grid user
• Oracle user
• The required permissions for Oracle RAC installation

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Purpose

This project was created mainly for learning and practicing:

• Oracle RAC
• Oracle Database Administration
• Oracle Grid Infrastructure
• Oracle ASM
• Oracle Clusterware
• Linux Administration

It can also be used as a simple reference for anyone who is starting to learn Oracle RAC installation and configuration.

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Important Note

This project is intended for learning and testing purposes.

Oracle RAC installation requirements can vary depending on the Oracle Database version, Oracle Linux version, network configuration, storage configuration and infrastructure.

Always check the official Oracle documentation before using the configuration in a production environment.

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Author

Panagiotis Chronopoulos