A healthcare organization hosts a patient record application on an Azure virtual machine n… — Microsoft Azure Solutions Architect (AZ-305)

A healthcare organization hosts a patient record application on an Azure virtual machine named VM1 in the East US region. The application uses a SQL Server database. You are designing a disaster recovery (DR) solution to replicate the workload to the West US region while meeting a Recovery Point Objective (RPO) of 10 minutes and a Recovery Time Objective (RTO) of 2 hours. VM1 has the following disk configuration:

- Disk 0 (OS): Peak write churn of $3\text{ MB/s}$
- Disk 1 (Application Binaries): Peak write churn of $8\text{ MB/s}$
- Disk 2 (Database Data and Logs): Peak write churn of $95\text{ MB/s}$

Which disaster recovery design should you recommend?

Configure Azure Site Recovery to replicate Disk 0 and Disk 1, exclude Disk 2 from replication, and use SQL Server Always On Availability Groups to replicate the database to the target region.Cevap
B
Configure Azure Site Recovery to replicate the entire VM1, selecting the High Churn replication policy for all disks.
C
Configure Read-Access Geo-Redundant Storage (RA-GRS) for VM1's virtual disks and perform a manual failover to the secondary region during a disaster.
D
Configure Azure Backup with Cross-Region Restore (CRR) to perform daily backups of VM1 to a Recovery Services vault.

Cevap

Configure Azure Site Recovery to replicate Disk 0 and Disk 1, exclude Disk 2 from replication, and use SQL Server Always On Availability Groups to replicate the database to the target region.

The correct option proposes replicating Disk 0 and Disk 1 using Azure Site Recovery while excluding Disk 2, and utilizing SQL Server Always On Availability Groups for the database. This design successfully accommodates the

95\text{ MB/s}

write churn on Disk 2, which exceeds the maximum Azure Site Recovery High Churn limit of

80\text{ MB/s}

per disk, while ensuring that the OS and application binaries are protected and RPO/RTO targets are met.

Adım Adım Çözüm

Analyze the write churn limits for Azure Site Recovery.

Identify that Azure Site Recovery has a standard write churn limit of

54\text{ MB/s}

per disk and a High Churn limit of

80\text{ MB/s}

per disk.

To determine if all VM disks can be replicated using Azure Site Recovery.

Compare VM1's disk churn metrics against the identified limits.

Disk 0 (

3\text{ MB/s}

) and Disk 1 (

8\text{ MB/s}

) are within limits, but Disk 2 (

95\text{ MB/s}

) exceeds the maximum ASR limit of

80\text{ MB/s}

To isolate which disks are unsupported by Azure Site Recovery.

Determine the alternative replication method for the unsupported database disk.

Exclude Disk 2 from Azure Site Recovery replication and implement SQL Server Always On Availability Groups to replicate the database to the target region.

To ensure database replication meets the RPO and RTO requirements without exceeding Azure Site Recovery disk limits.

Anahtar Kavram

Azure Site Recovery has strict write churn limits per disk (

54\text{ MB/s}

for standard and

80\text{ MB/s}

for High Churn). Workloads exceeding these limits must be replicated using alternative, native application-level replication methods like SQL Server Always On Availability Groups.

Soru

Cevap

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Anahtar Kavram

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