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Zorluk: OrtaDesign Azure Backup Solutions

You are designing a backup solution for an Azure Virtual Machine that hosts a critical database. The virtual machine has the following characteristics:
* Uses Standard Premium SSD managed disks.
* Requires backups to be retained in a vault for 180180 days.
* Requires the ability to perform instant recoveries (near-zero Recovery Time Objective (RTO)) using local snapshots for any recovery point from the last 77 days.
* The backup data must be resilient against a zone outage in the primary region.

Which backup configuration should you recommend?

  1. An Enhanced backup policy with instant restore retention set to 77 days, and a Recovery Services vault configured with Zone-Redundant Storage (ZRS).Cevap
  2. B
    A Standard backup policy with instant restore retention set to 77 days, and a Recovery Services vault configured with Zone-Redundant Storage (ZRS).
  3. C
    A Standard backup policy with instant restore retention set to 55 days, and a Recovery Services vault configured with Zone-Redundant Storage (ZRS).
  4. D
    An Enhanced backup policy with instant restore retention set to 77 days, and a Recovery Services vault configured with Locally Redundant Storage (LRS).

Cevap

An Enhanced backup policy with instant restore retention set to 77 days, and a Recovery Services vault configured with Zone-Redundant Storage (ZRS).
The correct configuration uses an Enhanced backup policy configured with 77 days of instant restore retention and a Recovery Services vault set to Zone-Redundant Storage (ZRS). The Enhanced policy is required because the Standard policy restricts the instant restore retention range to between 11 and 55 days, which would fail the requirement to support instant recoveries within 77 days. Furthermore, ZRS is required to ensure the backups remain available in the event of an availability zone outage within the primary region.

Adım Adım Çözüm

1
Analyze the instant recovery requirement.
The requirement states that the solution must support instant recovery (near-zero RTO) for any recovery point from the last 77 days. This means local snapshots must be retained for at least 77 days.
Instant recovery in Azure Backup relies on the snapshots stored in the source storage account/disk layer rather than the vault tier.
2
Determine the required backup policy type based on instant restore limits.
Standard backup policies support instant restore retention for only 11 to 55 days. Enhanced backup policies support configurable instant restore retention from 11 to 3030 days. Therefore, an Enhanced policy is required to meet the 77-day instant recovery window.
A Standard policy cannot be configured to hold snapshots for more than 55 days.
3
Identify the vault redundancy requirement.
The backups must survive a zone outage within the primary region. This requires selecting Zone-Redundant Storage (ZRS) for the Recovery Services vault.
Locally Redundant Storage (LRS) replicates data only within a single datacenter, failing to protect against a zone outage.

Anahtar Kavram

Azure VM backup policy tier limits and vault storage redundancy.
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Design Azure Backup Solutions

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