Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsEasy
An enterprise organization uses Azure Files to store critical shared documents. The files are frequently accessed by users across different departments and must remain available even if a single data center within an Azure region becomes unavailable. The organization needs a solution that provides high availability within a region but does not require cross-region replication for disaster recovery. Which Azure Files redundancy option should be chosen?
- AGeo-zone-redundant storage (GZRS)
- BZone-redundant storage (ZRS)
- CLocally-redundant storage (LRS)
- DGeo-redundant storage (GRS)
Show answer & explanationAnswer & explanation
Correct answer: B. Zone-redundant storage (ZRS)
Zone-redundant storage (ZRS) for Azure Files ensures that data is synchronously replicated across three Azure availability zones in the primary region. This provides high availability and protects against data center failures within the region without replicating to a secondary region, matching the requirement for intra-region high availability.
Why the other options are wrong
- A. GZRS combines zone-redundancy and geo-redundancy, which is more than what is required and introduces unnecessary cost for this specific scenario.
- C. LRS provides redundancy within a single data center, which does not protect against a data center becoming unavailable.
- D. GRS provides cross-region replication for disaster recovery, which is explicitly stated as not required for this scenario.
Azure Files Zone-redundant storage (ZRS)
An Azure Files redundancy option that synchronously replicates data across three Azure availability zones within a single region, providing high availability against data center failures.
- Data is replicated across 3 AZs in a region.
- Protects against data center-level outages.
- Offers 11 nines (99.999999999%) durability.
- Does not provide cross-region disaster recovery.
Memory trick: ZRS for Files: Your files are safe across zones, staying in their home region.