Real Application Clusters
Oracle Real Application Clusters (RAC) allow customers to run a single Oracle Database across multiple servers in order to maximize availability and enable horizontal scalability, while accessing shared storage. User sessions connecting to Oracle RAC instances can failover and safely replay changes during outages, without any changes to end user applications, hiding the impact of the outages from end users.
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New Generation Oracle RAC
Oracle Real Application Clusters 19c includes many improvements that enable applications to achieve significantly better levels of availability and scalability than previous versions. These improvements create a new generation of Oracle RAC technology ready to meet the needs of next-generation workloads and applications.
Oracle Real Application Clusters features
Key capabilities
Cache synchronization
Application developers connect to any database instance in the cluster without making any changes to the application reducing downtime.
Smart cluster reconfiguration
Customers reduce the impact of service disruptions by automatically redirecting connections to surviving instances.
Full stack protection
Oracle RAC provides end-to-end protection of customer databases by safely replaying transactions during outages without impacting end user experience.
Flexibility
Multi-platform support
Customers can standardize across their Oracle Database environments by using Oracle RAC in Oracle Cloud, on Oracle engineered systems, and on generic hardware.
Oracle does not support Oracle Real Application Clusters on Non-Oracle public cloud environments. For more information, refer to My Oracle Support Note 2688277.1.
Oracle Database Support for Non-Oracle Public Cloud Environments
Licensing choices
Customers reduce cloud and on-premises costs by using a combination of Oracle RAC subscription-based pricing and licenses.
Autonomous Database integration
Database administrators save time by utilizing pre-configured Oracle RAC capabilities in Autonomous Database.
Scalability
Scale features and functions
Rapidly scale all Oracle Database features and functions across multiple instances to address sudden changes in customer workloads, without the need for manual intervention.
No application changes
Scale applications up to one hundred nodes in a cluster without application changes, improving DBA and developer productivity.
Faster OLTP
Oracle RAC improves Oracle Database performance for crucial enterprise application workloads, including Oracle E-Business Suite, Oracle PeopleSoft, and SAP ERP Central Component (ECC) by scaling workloads across all instances of the cluster.
More scalable analytics
Oracle RAC allows customers to easily scale analytics workloads by eliminating the need for replica databases and database level conflict resolution, significantly improving database administrator productivity.
Availability
Reduce unplanned downtime
Oracle RAC enables customer databases to continue to run across component failures, reducing potential data loss and minimizing unplanned downtime created by single-point-of-failure designs.
Eliminate planned downtime
Customers eliminate planned, maintenance related downtime by using Oracle RAC to implement rolling upgrades and patching on a server-by-server basis.
Sharding
IT teams use Oracle RAC with Oracle Sharding to provide high availability for each shard in the database.
Integration
Tight integration with Oracle Active Data Guard and Oracle GoldenGate enables IT teams to maximize Oracle Database availability and protection using proven Oracle Maximum Availability Architecture (MAA) best practices.
Customer successes
Oracle Real Application Clusters are used by customers around the world to increase Oracle Database availability and scale database performance across multiple database servers.
Oracle Real Application Clusters use cases
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Provide continuous availability
Maximize database availability by removing individual database servers as single points of failure for unplanned downtime and leverage rolling patching to eliminate planned downtime.
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Scale Oracle Database workloads
Dynamically scale databases without disrupting operations or requiring any changes to application code.
Oracle Real Application Clusters 19c technical architecture (PDF)
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Consolidate database environments
Reduce infrastructure costs and the complexity of database environments by running more Oracle Database instances on fewer servers without compromising isolation requirements.
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Oracle Cloud Database Services
Oracle Real Application Clusters is supported with Oracle Database Services in Oracle Cloud Infrastructure (OCI). Oracle does not support Oracle Real Application Clusters on Non-Oracle public cloud environments. For more information, refer to My Oracle Support Note 2688277.1.
Oracle Database Support for Non-Oracle Public Cloud Environments
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Resources
Customer community
Take advantage of free tutorial and hands-on labs for Oracle Database and Real Application Clusters.
Related products and technologies
Advanced Cluster File System
POSIX and X/OPEN compliant cluster file system supports multiple OS
Get started with RAC
Try Autonomous Database for free
Explore with $300 in free credits and always free instances of Autonomous Database.
Learn more
Attend webcasts and hands-on workshops hosted by Oracle Product Management.
Contact us
Interested in learning more? Contact one of our experts.