You are the database administrator for a global e-commerce company that runs its critical order processing system on Azure SQL Database. The database is currently deployed as a single database in the West US region using the Business Critical service tier (4 vCores, 320 GB storage). The application requires a Recovery Point Objective (RPO) of no more than 5 seconds and a Recovery Time Objective (RTO) of no more than 30 seconds in the event of a regional outage. The secondary region must be in East Asia. The solution must also handle planned failovers for maintenance without data loss. You need to configure high availability and disaster recovery to meet these requirements with the lowest possible latency for writes. What should you do?
Correct because auto-failover groups with readable secondary in East Asia meet RPO and RTO with minimal write latency.
Why this answer
Auto-failover groups with a readable secondary in East Asia using Business Critical tier provide automatic failover meeting RTO of 30 seconds, and asynchronous geo-replication typically achieves RPO of 5 seconds for Azure SQL Database. The readable secondary can also handle read-only workloads. This configuration offers the lowest write latency since writes are acknowledged locally without waiting for cross-region synchronization.
Option A is incorrect because geo-restore has RPO of 1 hour and RTO of several hours. Option B is incorrect because zone redundancy is intra-region and Traffic Manager does not ensure RPO/RTO. Option D is incorrect because active geo-replication is asynchronous, not synchronous, and synchronous cross-region replication is not supported; it would increase write latency.
Exam trap
Candidates may think synchronous replication is needed for low RPO, but Azure SQL Database does not support synchronous geo-replication. Asynchronous replication with auto-failover groups can achieve RPO of 5 seconds.