Well-Architected design for resiliency with Oracle Database@AWS

This article provides guidance on implementing high availability and disaster recovery for Oracle Database@AWS using Data Guard, following AWS Well-Architected Framework and Oracle Maximum Availability Architecture best practices.

• Oracle Database@AWS offers managed Exadata infrastructure within AWS data centers with automated management and security
• Data Guard enables cross-AZ high availability and cross-Region disaster recovery protection
• Two connectivity options for Data Guard: AWS Transit Gateway (AWS network isolation) or OCI VCN peering (OCI network)
• Cross-AZ deployments use local peering gateways or Transit Gateway with low single-digit millisecond latency
• Cross-Region deployments require Transit Gateway peering or remote VCN peering with hub VCNs
• ExaDB-D supports 6 standby databases; ADB-D supports 2 standby databases
• Applications should connect through peered VPCs or Transit Gateway for transparent failover without reconfiguration
• Data Guard Observer enables automated failover; manual configuration required for ExaDB-D, automatic for ADB-D

The article demonstrates how to architect resilient Oracle databases on AWS using multi-layered protection strategies combining RAC, Data Guard replication, and cross-Region disaster recovery.