Zooming in on High Availability and Disaster Recovery
Let's start by clarifying the difference between High Availability (HA) and Disaster Recovery (DR). HA focuses on maximizing the availability of a solution by ensuring it can withstand adverse events such as a service instance crash, hardware failure, and similar disruptions.DR, on the other hand, is about ensuring a solution can withstand major incidents—such as data center fires, flooding, earthquakes, and other large-scale disruptions.In Azure, HA is typically achieved by using Availability Zones within a single region, ensuring resilience against localized failures. For DR, workloads are deployed across multiple regions to protect against the complete unavailability of an entire region or a regional service outage. Because DR-compliant architectures span multiple regions, they are also highly available by nature, especially in case of ACTIVE/ACTIVE multi-region setup.Whether you design a solution for HA or DR depends...
