Oracle RAC
Oracle Real Application Clusters (RAC) is a high-availability database solution that allows multiple instances of Oracle Database to run on a cluster of servers, accessing a single shared database. It provides scalability, fault tolerance, and load balancing by enabling transparent application failover and parallel processing across nodes. RAC is commonly used in enterprise environments to ensure continuous database availability and performance under heavy workloads.
Developers should learn Oracle RAC when building or maintaining mission-critical applications that require high availability, such as financial systems, e-commerce platforms, or healthcare databases, where downtime is unacceptable. It is essential for scenarios needing horizontal scaling to handle increasing user loads or for disaster recovery setups, as it allows seamless failover and resource pooling across multiple servers.