A global media company uses Azure Blob Storage to store large video files that are accessed frequently by users worldwide. The company requires maximum data durability, immediate accessibility, and protection against regional outages. Data must be replicated to a secondary region and across multiple availability zones within both the primary and secondary regions. Which Azure Storage redundancy option should be selected?
- AGeo-zone-redundant storage (GZRS)
- BLocally-redundant storage (LRS)
- CGeo-redundant storage (GRS)
- DZone-redundant storage (ZRS)
Show answer & explanationAnswer & explanation
Correct answer: A. Geo-zone-redundant storage (GZRS)
Geo-zone-redundant storage (GZRS) provides maximum durability by synchronously replicating data across three Azure availability zones in the primary region and then asynchronously replicating it to a single physical location in a secondary region. This combination ensures high availability within the primary region and disaster recovery to a secondary region, meeting all specified requirements for durability, accessibility, and protection against regional outages.
Why the other options are wrong
- B. LRS provides redundancy within a single data center, offering the lowest durability and no protection against regional outages.
- C. GRS replicates data to a secondary region but does not provide zone-level redundancy within the primary region, offering less availability than GZRS.
- D. ZRS provides redundancy across availability zones within a single region, protecting against data center failures but not regional outages.
Azure Geo-zone-redundant storage (GZRS)
The highest level of Azure Storage redundancy, combining zone-redundant storage (ZRS) in the primary region with geo-redundant storage (GRS) to a secondary region.
- Synchronous replication across 3 AZs in primary region.
- Asynchronous replication to secondary region.
- Offers 12 nines (99.9999999999%) durability.
- Protects against both zone and regional failures.
Memory trick: GZRS is the ultimate shield, protecting your data across zones and regions.