Microsoft Certified: Azure Solutions Architect ExpertDesign business continuity solutionsHard
A global e-commerce company uses Azure Blob Storage for storing product images. To ensure high availability and durability, the company needs to ensure that its data is replicated across multiple data centers within a region and also to a secondary region hundreds of miles away. Which Azure Storage redundancy option should be selected?
- 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) provides maximum durability by replicating data synchronously across three Azure availability zones in the primary region and then asynchronously replicating it to a single physical location in a secondary region, combining the benefits of ZRS and GRS.
Why the other options are wrong
- B. GRS replicates data three times within a single physical location in the primary region and then asynchronously to a single physical location in a secondary region, but does not offer zone redundancy in the primary region.
- C. ZRS replicates data synchronously across three Azure availability zones in the primary region, providing resilience within the region but not to a secondary region.
- D. LRS replicates data three times within a single physical location in the primary region, not across zones or to a secondary region.
Azure Geo-zone-redundant storage (GZRS)
GZRS provides maximum durability for Azure Storage by replicating data synchronously across multiple availability zones in the primary region and asynchronously to a secondary region.
- Combines benefits of ZRS (intra-region zone redundancy) and GRS (cross-region redundancy).
- Offers 16 nines of durability.
- Suitable for mission-critical applications requiring maximum resilience.
Memory trick: GZRS: Global zones, ultimate resilience.