Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
You are designing the migration for a 6-TB SQL Server 2014 database that runs on-premises. The database uses SQL Agent jobs, Service Broker, linked servers, and cross-database queries. The business requires less than 15 minutes of downtime during cut-over and wants built-in high availability in Azure without having to patch or manage the operating system. A 1-Gbps ExpressRoute circuit is available, and firewall rules can be changed as needed. Which migration target and approach should you recommend?
Use Azure Database Migration Service for an online migration to Azure SQL Managed Instance in the Business Critical tier.
Back up the database to Azure Storage and restore it into Azure SQL Database Hyperscale.
Configure transactional replication to a SQL Server 2019 container running in Azure Kubernetes Service, then redirect clients at cut-over.
Use Azure Site Recovery to replicate the on-premises VM and fail over to SQL Server on Azure Virtual Machines deployed in an availability set.
Azure SQL Managed Instance preserves full SQL Server engine compatibility, including SQL Agent, cross-database queries, linked servers, and Service Broker, while Microsoft manages the underlying OS and provides built-in high availability in the Business Critical tier. Azure Database Migration Service supports online (continuous) migrations from SQL Server 2014 to Managed Instance, allowing data to be synchronized while the source remains online and limiting the final cut-over to only a few minutes.
Choosing Site Recovery with SQL VMs keeps the need to patch and manage the OS, and downtime during planned failover typically exceeds 15 minutes. Restoring a backup to Azure SQL Database Hyperscale would not support SQL Agent, cross-database queries, or Service Broker. Transactional replication to a containerized SQL Server on AKS provides no platform-level high availability or OS management and requires significant custom management effort. Therefore, an online DMS migration to Azure SQL Managed Instance (Business Critical) best meets all requirements.
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Microsoft Azure Solutions Architect Expert AZ-305
Design infrastructure solutions
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