You are designing a disaster recovery solution for a retail inventory system hosted on Azu… — Microsoft Azure Solutions Architect (AZ-305)

You are designing a disaster recovery solution for a retail inventory system hosted on Azure virtual machines in the West US 2 region. The solution must replicate the workloads to the West Central US region.

The workload consists of the following virtual machines:
* VM-Web: Running web services with one OS disk (Premium SSD) experiencing a write churn of $2\text{ MB/s}$ .
* VM-Data: Running an inventory processing database with one OS disk (Premium SSD) experiencing a write churn of $3\text{ MB/s}$ , one database data disk (Premium SSD) experiencing a write churn of $14\text{ MB/s}$ , and one temporary cache disk (Premium SSD) experiencing a write churn of $22\text{ MB/s}$ .

You have a target Recovery Point Objective (RPO) of $4\text{ hours}$ and a Recovery Time Objective (RTO) of $1\text{ hour}$ .

Which two actions should you include in the disaster recovery design to ensure supportability and minimize replication costs? (Select two.)

Exclude the temporary cache disk from replication for VM-Data.Answer
Select the High Churn replication policy tier for VM-Data.Answer
C
Replicate all disks of VM-Data using the standard replication policy tier.
D
Configure Azure Backup to run hourly backups of VM-Data instead of using Azure Site Recovery.

Answer

To support VM-Data and minimize replication costs, you must exclude the temporary cache disk from replication and select the High Churn replication policy tier for VM-Data.

Excluding the temporary cache disk from replication reduces cost and removes the need to replicate transient data. Because the database data disk has a write churn of

14\text{ MB/s}

, which exceeds the standard replication limit of

10\text{ MB/s}

for Premium SSDs, configuring the High Churn replication policy tier is required to support replication of the remaining database data disk.

Step-by-Step Solution

Analyze the write churn for each disk on VM-Data.

The OS disk has a write churn of

3\text{ MB/s}

, the database data disk has a write churn of

14\text{ MB/s}

, and the temporary cache disk has a write churn of

22\text{ MB/s}

Identifying the churn per disk allows comparison against Azure Site Recovery limits.

Identify cost optimization opportunities.

The temporary cache disk (

22\text{ MB/s}

) does not contain persistent data and should be excluded from replication.

Excluding temporary disks avoids unnecessary storage costs and replication traffic.

Select the correct replication tier for the remaining database data disk.

The remaining database disk has a write churn of

14\text{ MB/s}

, which exceeds the standard limit of

10\text{ MB/s}

for Premium SSDs but is supported under the High Churn replication policy tier (up to

54\text{ MB/s}

Selecting the High Churn policy ensures replication stays healthy and supported.

Key Concept

Azure Site Recovery limits, disk exclusion, and High Churn replication policy tier configuration.

Question

Answer

Step-by-Step Solution

Key Concept

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