Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
Your company runs a business-critical workload on a single Azure SQL Database in the General Purpose tier in West Europe. Compliance policy requires that if the entire region becomes unavailable, the application must automatically fail over to another Azure region within one minute and lose at most five seconds of committed data. The solution must involve minimal administrative effort.
Which data-protection solution should you recommend?
Enable Azure SQL Database active geo-replication and configure the application to switch connection strings manually after a failure.
Configure an Azure SQL Database auto-failover group between West Europe and North Europe using the Business Critical service tier with automatic failover.
Enable Azure Backup with geo-redundant storage and rely on point-in-time restore to recreate the database in North Europe after an outage.
Migrate the database to SQL Server on Azure Virtual Machines deployed in an availability set and protect it with Azure Site Recovery.
Azure SQL Database auto-failover groups extend active geo-replication with an automatic, policy-based failover capability and a globally distributed listener endpoint. When enabled between paired regions and combined with a Business Critical or Premium tier, the feature offers a recovery point objective of under five seconds and a typical recovery time of under 30 seconds-meeting the stated RPO and RTO requirements. Active geo-replication alone cannot trigger automatic failover; it requires manual intervention, so it fails the RTO requirement. Azure Backup with geo-redundant storage provides only periodic backups and point-in-time restore, resulting in RPOs measured in minutes or hours and manual recovery steps that far exceed the one-minute RTO. Azure Site Recovery does not support protecting Azure SQL Database (PaaS); it is intended for IaaS workloads such as virtual machines. Therefore, configuring an auto-failover group in the Business Critical tier across regions is the only option that satisfies all requirements with minimal ongoing management.
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Microsoft Azure Solutions Architect Expert AZ-305
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