Oracle 19c Data Guard & Data Guard Broker
A complete, step-by-step implementation guide for a 2-Node RAC Primary and a Standalone Physical Standby (both on ASM) Real-time redo transport, zero data loss, automated role transitions — Data Guard remains Oracle's gold standard for high availability and disaster recovery. This walkthrough takes a working configuration from prerequisites all the way through Broker-managed switchover, with every command, every parameter, and the reasoning behind each decision. What this guide covers Why Data Guard, and what this implementation proves Reference architecture (RAC primary + standalone standby) Prerequisites and design decisions Primary database preparation (archivelog, force logging, init params) Standby Redo Logs — sizing and thread mapping Network configuration (hosts, tnsnames, listener) Password file, PFILE and standby instance bring-up Cloning the standby with RMAN DUPLICATE … FROM ACTIVE DATABASE Starting Redo Apply and verifying synchronization Real-time log apply verificat...