Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsMedium
A media company uses Azure Blob Storage to store large video files that are accessed frequently for streaming and editing. The company requires a storage solution that can withstand regional outages and ensures data durability across multiple Azure regions. Which storage redundancy option should be selected for this Blob Storage account?
- AGeo-zone-redundant storage (GZRS)
- BGeo-redundant storage (GRS)
- CZone-redundant storage (ZRS)
- DLocally-redundant storage (LRS)
Show answer & explanationAnswer & explanation
Correct answer: A. Geo-zone-redundant storage (GZRS)
Geo-zone-redundant storage (GZRS) combines the high availability of ZRS (redundancy across Availability Zones within a region) with the disaster recovery capabilities of GRS (replication to a secondary region), thus protecting against both zonal and regional outages.
Why the other options are wrong
- B. GRS provides redundancy to a secondary region but does not offer zone-level redundancy within the primary region.
- C. ZRS provides redundancy across Availability Zones within a single region, protecting against zonal failures but not full regional outages.
- D. LRS provides redundancy within a single data center, not protecting against regional outages.
Azure Storage Geo-zone-redundant storage (GZRS)
Combines high availability within a primary region (using Availability Zones) with disaster recovery to a secondary region, offering maximum durability and availability.
- Data is replicated synchronously across three Azure Availability Zones in the primary region.
- Data is then asynchronously replicated to a single physical location in a secondary region.
- Offers 99.99999999999999% (16 nines) annual durability.
Memory trick: Redundancy Levels: L-Z-G-GZ, each step increases protection.