Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
You are designing disaster recovery for an on-premises VMware estate hosting 20 critical application servers with a total of 10 TB of data. The business requires a maximum data loss of 15 minutes (RPO) and full workload availability in Azure within two hours (RTO) if the primary datacenter fails. The solution must keep ongoing infrastructure costs low and require minimal administration. Which Azure-based service should you recommend?
Azure Site Recovery with continuous replication of the VMware virtual machines to a secondary Azure region
Azure Backup vault configured for daily VM-level backups stored in geo-redundant storage
Geo-redundant blob storage replication combined with custom PowerShell scripts to redeploy the servers
Azure Migrate Server Migration to copy the virtual machines to Azure when a disaster is declared
Azure Site Recovery is designed for business continuity and disaster recovery scenarios. It can continuously replicate on-premises VMware virtual machines to Azure with configurable replication intervals as low as five minutes, easily meeting a 15-minute RPO. Because compute resources in the target region are only created during a failover, ongoing costs remain low. Recovery plans automate failover and startup of the replicated VMs, enabling recovery well within a two-hour RTO.
Azure Backup creates periodic recovery points and requires a time-consuming restore of 10 TB before the VMs can start, so the two-hour RTO is unlikely. Azure Migrate's Server Migration tool is intended for one-time moves, not continuous protection. Relying solely on geo-redundant storage and custom scripts provides object replication only and leaves significant manual effort, making the RPO and RTO unattainable.
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Microsoft Azure Solutions Architect Expert AZ-305
Design business continuity solutions
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