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Zorluk: KolayDesign Azure Site Recovery Solutions

You are designing a disaster recovery solution for an Azure virtual machine (VM) that runs a database workload. The VM has a single Premium SSD data disk with a constant write churn rate of 25 MB/s25\text{ MB/s}. The solution must replicate the VM to a secondary Azure region and support a Recovery Point Objective (RPO) of 15 minutes. Which replication option should you select to meet these requirements?

  1. A
    Azure Site Recovery with standard replication
  2. B
    Azure Backup with cross-region restore
  3. Azure Site Recovery with high-churn replication enabledCevap
  4. D
    Azure Storage geo-replication using Read-Access Geo-Redundant Storage (RA-GRS)

Cevap

Azure Site Recovery with high-churn replication enabled
The correct option is Azure Site Recovery with high-churn replication enabled. Standard Azure Site Recovery replication has a write churn limit of 20 MB/s20\text{ MB/s} per Premium SSD disk. To support a disk with a churn rate of 25 MB/s25\text{ MB/s} and maintain a low RPO, high-churn replication must be enabled, which increases the supported limit up to 100 MB/s100\text{ MB/s} per disk.

Adım Adım Çözüm

1
Evaluate the workload limits against replication capabilities.
The workload has a write churn rate of 25 MB/s25\text{ MB/s} on a single Premium SSD.
Determining write churn is necessary because Azure Site Recovery enforces limits per disk based on the replication policy.
2
Compare replication tiers in Azure Site Recovery.
Standard replication supports up to 20 MB/s20\text{ MB/s} per Premium SSD disk, whereas high-churn replication supports up to 100 MB/s100\text{ MB/s} per disk.
Identifying the limits ensures the selected replication method can sustain the write volume without lagging.
3
Select the option that meets the RPO and replication constraints.
Azure Site Recovery with high-churn replication enabled is selected.
This configuration safely handles the 25 MB/s25\text{ MB/s} write churn and supports the low RPO requirement.

Anahtar Kavram

Azure Site Recovery Write Churn Limits
Tahmini Süre:1m 0s
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Design Azure Site Recovery Solutions

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