When RAC Actually Delivers Value: architecture and use cases

Right-size the cluster: CPU, memory, interconnect and storage design

Optimize Cache Fusion: identify hot blocks and reduce global waits

Service-aware load balancing and failover: services, FAN and FCF

Maintenance without downtime: rolling patches, OPatchAuto and RMAN

Practical application: runbooks, checks and scripts

Oracle RAC gives you active‑active availability and the ability to scale both reads and writes — but that capability comes at the cost of inter‑instance coordination, operational complexity, and greater sensitivity to networking and storage design.…