Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
You are designing a cost-optimized architecture for a single Azure SQL Database that currently runs in the General Purpose service tier with 8 provisioned vCores. Telemetry shows that CPU utilization peaks at about 60 percent for two hours each weekday morning and remains below 5 percent for the rest of the day. The database is 200 GB and is expected to grow to 400 GB within a year. The solution must maintain the platform's 99.99 percent availability SLA and must not require any application changes. Which combination of service tier and compute tier should you recommend?
Upgrade the database to the Business Critical service tier with 8 provisioned vCores in a zone-redundant deployment.
Place the database in a General Purpose elastic pool that uses 8 provisioned vCores shared by a single database.
Migrate the database to the Hyperscale service tier with provisioned compute and enable autoscale read replicas.
Move the database to the General Purpose service tier with the serverless compute tier, configuring a low minimum vCore setting and auto-pause.
Moving the database to the serverless compute tier in the General Purpose service tier allows the database to scale automatically between a configured minimum and maximum number of vCores (0.5-40 on Gen5 hardware). When the workload is idle for the configured delay, the database can pause, so you pay only for storage until activity resumes. The deployment keeps the 99.99 percent SLA that applies to single databases in the General Purpose tier and supports up to 1 TB of storage-well above the projected 400 GB size. Business Critical or Hyperscale tiers can offer higher performance, and Hyperscale also supports a serverless option, but both are more expensive than required for this workload. An elastic pool with 8 provisioned vCores would incur full compute charges around the clock because it would host only one database. Therefore, General Purpose with serverless compute best meets the cost-optimization, scalability, and availability requirements without any code changes.
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Microsoft Azure Solutions Architect Expert AZ-305
Design data storage solutions
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