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Overview of Oracle Real Application Clusters :
A cluster comprises multiple interconnected computers or servers that appear as if they are one server to end users and applications. Oracle Real Application Clusters (Oracle RAC) enables you to cluster Oracle databases. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so they operate as a single system.
Oracle Clusterware is a portable cluster management solution that is integrated with the Oracle database. Oracle Clusterware is also a required component for using Oracle RAC. In addition, Oracle Clusterware enables both single-instance Oracle databases and Oracle RAC databases to use the Oracle high-availability infrastructure. Oracle Clusterware enables you to create a clustered pool of storage to be used by any combination of single-instance and Oracle RAC databases.
Oracle Clusterware is the only clusterware that you need for most platforms on which Oracle RAC operates. You can also use clusterware from other vendors if the clusterware is certified for Oracle RAC.
In database computing, Oracle Real Application Clusters (RAC) an option for the Oracle Database software produced by Oracle Corporation and introduced in 2001 with Oracle9i provides software for clustering and high availability in Oracle database environments. Oracle Corporation includes RAC with the Standard Edition of Oracle Database, but makes it an extra-charge option for the Enterprise Edition.
Oracle RAC allows multiple computers to run Oracle RDBMS software simultaneously while accessing a single database, thus providing clustering.
Advanced Oracle DBA Training Syllabus – RAC
Oracle 11g R2 Grid Infrastructure Concepts
What is a Cluster
Grid Foundation Components
Oracle Clusterware Architecture
Oracle Clusterware Software and Storage
Describe ASM Architecture
Creating and Managing ASM Disk Groups
Creating and MaMaximum Protection
How to Set the Mode
Creating a Physical Standby Database by Using SQL
Preparing the Primary Database
Setting Initialization Parameters on the Primary Database
Backing Up the Primary Database
Creating a Control File for the Standby Database
Setting Initialization Parameters on the Standby Database
Setting Up the Environment to Support the Standby Database
Starting the Physical Standby Database
Performing Additional Configuration Tasks
Creating a Logical Standby Database by Using SQL
Preparing to Create a Logical Standby Database
Creating a Physical Standby Database
Preparing the Primary Database
Transitioning to a Logical Standby Database
Opening the Logical Standby Database
Verifying the Logical Standby Database
naging ASM Cluster File systems
Administering Oracle Clusterware
Troubleshooting Oracle Clusterware
Grid Infrastructure Installation and Configuration
DNS and DHCP Configuration
Grid Plug and Play Considerations
Single Client Access Names
Post installation tasks
Oracle Automatic Storage Management concepts
ASM Disk Groups
Cluster installation Prerequisite for Oracle 11g R2 RAC
Linux OS Software Installation
Create OS Group and User Accounts