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Difficulty: HardData Redundancy and High Availability

A company is designing a shared storage solution for a high-performance financial analysis application. The storage must meet the following requirements:

* The storage must be hosted on Azure Files and require the Premium performance tier to meet strict IOPS and sub-millisecond latency demands.
* The shared file system must survive the outage of a single datacenter zone in the primary region without data loss or downtime.
* In the event of a regional disaster, the data must be recoverable in a secondary Azure region.

Which two actions should you include in the design to meet these requirements? (Select two.)

  1. Configure the storage account containing the Premium file shares to use Zone-Redundant Storage (ZRS).Answer
  2. Use Azure File Sync to replicate the Premium file shares to a storage account in the secondary region.Answer
  3. C
    Configure the storage account containing the Premium file shares to use Read-Access Geo-Redundant Storage (RA-GRS) to support write workloads in both regions.
  4. D
    Configure the storage account containing the Premium file shares to use Locally Redundant Storage (LRS) to protect against zone failures.
  5. E
    Configure the storage account to use Locally Redundant Storage (LRS) and locate all virtual machine nodes within a single availability zone.

Answer

Configure the storage account containing the Premium file shares to use Zone-Redundant Storage (ZRS) and use Azure File Sync to replicate the Premium file shares to a storage account in the secondary region.
The correct architecture combines Zone-Redundant Storage (ZRS) to protect against primary region zonal outages, and Azure File Sync to replicate the premium file shares to a secondary region. Because Premium Azure Files only supports LRS and ZRS natively at the storage level, regional redundancy must be achieved using secondary replication tools.

Step-by-Step Solution

1
Analyze performance and protocol requirements.
Azure Files Premium performance tier (FileStorage account type) is required for low-latency workloads.
This restricts the available replication options to LRS and ZRS, as GRS, GZRS, RA-GRS, and RA-GZRS are not natively supported by the FileStorage account type.
2
Evaluate zone redundancy options.
Zone-Redundant Storage (ZRS) must be selected.
ZRS replicates the files synchronously across three availability zones in the primary region, allowing the shared file system to survive a single zone outage without downtime.
3
Determine regional disaster recovery strategy.
Natively configured geo-replication is not supported on Premium files. An external replication mechanism like Azure File Sync is required.
Azure File Sync can sync files between a local server or virtual machine and an Azure file share in another region, enabling cross-region data availability.

Key Concept

Premium Azure Files support only LRS and ZRS; geo-redundancy must be implemented via secondary replication mechanisms like Azure File Sync.
Estimated Time:2m 30s
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Topics

Data Redundancy and High Availability

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