Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsMedium
A global media company uses Azure Blob Storage to store large video files that are accessed frequently for streaming and editing. The company requires maximum durability and availability for these files, even in the event of a regional outage or a zone outage within a region. The solution must also support read access to the data from a secondary region. Which Azure Storage redundancy option should be chosen?
- AGeo-redundant storage (GRS)
- BZone-redundant storage (ZRS)
- CGeo-zone-redundant storage (GZRS)
- DLocally-redundant storage (LRS)
Show answer & explanationAnswer & explanation
Correct answer: C. Geo-zone-redundant storage (GZRS)
GZRS provides maximum durability and availability by replicating data synchronously across three Azure availability zones in the primary region and asynchronously to a single physical location in a secondary region. This protects against both zone and regional outages and allows read access from the secondary region.
Why the other options are wrong
- A. GRS replicates data to a secondary region but does not provide zone redundancy within the primary region for maximum availability.
- B. ZRS provides redundancy across multiple availability zones within a single region, but not against a full regional outage.
- D. LRS provides redundancy within a single data center, not protecting against zone or regional outages.
Azure Geo-zone-redundant storage (GZRS)
An Azure Storage redundancy option that combines zone-redundant storage (ZRS) in the primary region with geo-redundant storage (GRS) to a secondary region, offering maximum durability and availability.
- Synchronous replication across 3 availability zones in primary region
- Asynchronous replication to a secondary region
- Protects against zone and regional outages
- Allows read access from secondary endpoint (RA-GZRS)
Memory trick: GZRS is the ultimate shield, zones and regions covered.