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Mention what is oracle real application clusters?
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Answer / Dhirendra Kumar Jha
"Oracle Real Application Clusters (RAC) is a database clustering solution for high availability and scalability. RAC enables multiple instances to access and manage the same database concurrently, providing failover capabilities and the ability to scale horizontally.nn1. High Availability: RAC enables databases to survive hardware failures by automatically redirecting application requests to another node in the cluster.n2. Scalability: RAC allows databases to be scaled horizontally by adding more servers (nodes) to the cluster, improving performance as workload increases.n3. Parallel Query Execution: RAC supports parallel query execution, which can significantly improve query performance by distributing the workload across multiple nodes."
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