Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
Your company runs an e-commerce application on a single Azure SQL Database in the General Purpose service tier located in the East US region. After several regional outages, leadership asks you to redesign the data layer to achieve these goals:
At least 99.99 percent availability even if an Azure region becomes unavailable.
Automatic failover with a recovery time objective (RTO) of no more than five minutes and minimal data loss (RPO of a few seconds).
Ability to off-load read-only traffic to a secondary replica in another region.
No requirement to manage Windows or Linux virtual machines.
Which solution should you recommend?
Upgrade the database to the Business Critical service tier and configure an Azure SQL Database auto-failover group with a geo-secondary replica in a paired Azure region.
Deploy an Azure SQL Managed Instance in the General Purpose tier with zone redundancy enabled in the current region.
Migrate to SQL Server 2022 on Azure Virtual Machines in an availability set across two availability zones and configure an Always On failover cluster instance.
Migrate to Azure Database for PostgreSQL Flexible Server with zone-redundant high availability enabled.
Upgrading the database to the Business Critical service tier provides built-in high availability within the primary region by maintaining multiple synchronous replicas and enabling automatic failover, all without requiring virtual-machine administration. Creating an Azure SQL Database auto-failover group and adding a geo-replicated secondary in a paired region extends protection across regions. The service offers a 99.995 percent SLA, supports RPO of less than five seconds, and typically fails over within five minutes. The geo-secondary remains read-only during normal operations, allowing you to off-load analytical or reporting workloads. The other options either require managing virtual machines, provide only single-region redundancy, or introduce database-engine incompatibility.
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Microsoft Azure Solutions Architect Expert AZ-305
Design business continuity solutions
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