Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsMedium
An enterprise organization uses Azure Files to store critical shared documents. The files are frequently accessed by users across different departments within a single Azure region. The organization requires a highly available solution that protects against data loss due to hardware failures or power outages within an Azure data center. Data consistency must be strong. Which Azure Storage redundancy option should be configured for the Azure File Share?
- ARead-access geo-redundant storage (RA-GRS).
- BZone-redundant storage (ZRS).
- CGeo-redundant storage (GRS).
- DLocally-redundant storage (LRS).
Show answer & explanationAnswer & explanation
Correct answer: B. Zone-redundant storage (ZRS).
Zone-redundant storage (ZRS) for Azure Files synchronously replicates data across three Azure availability zones within a region. This provides strong consistency and protection against data center-level failures, ensuring high availability for shared documents within that region.
Why the other options are wrong
- A. RA-GRS allows read access to the secondary region but offers eventual consistency and does not specifically address within-region data center failure protection with strong consistency for all operations.
- C. GRS offers protection against regional outages but does not provide synchronous replication across availability zones within the primary region, and eventual consistency for the secondary.
- D. LRS protects against drive and node failures but not against a complete data center outage.
Azure Files Zone-redundant storage (ZRS)
Azure Files ZRS provides high availability and strong consistency for file shares by synchronously replicating data across three Azure availability zones within a single region, protecting against data center failures.
- Synchronous replication across 3 AZs.
- Protects against data center-level failures within a region.
- Offers strong consistency for all operations.
- Suitable for highly available shared file access.
Memory trick: Files in Azure need ZRS for Zone Resilience.