Microsoft Certified: Azure Administrator AssociateImplement and manage storageMedium
A company is implementing geo-redundant storage for their critical application data in Azure. They need to ensure data durability even in the event of a regional outage, with the ability to read data from the secondary region. Which redundancy option meets these requirements?
- ARead-Access Geo-Redundant Storage (RA-GRS)
- BGeo-Redundant Storage (GRS)
- CLocally Redundant Storage (LRS)
- DZone-Redundant Storage (ZRS)
Show answer & explanationAnswer & explanation
Correct answer: A. Read-Access Geo-Redundant Storage (RA-GRS)
Read-Access Geo-Redundant Storage (RA-GRS) provides redundancy across two Azure regions and allows read access to the data in the secondary region, which meets the requirement for both regional outage protection and read availability.
Why the other options are wrong
- B. GRS replicates data to a secondary region but does not allow direct read access to the secondary endpoint unless a failover occurs.
- C. LRS provides redundancy within a single data center, not across regions.
- D. ZRS provides redundancy across availability zones within a single region, not across regions.
Read-Access Geo-Redundant Storage (RA-GRS)
RA-GRS replicates your data to a secondary region and provides read access to the data in the secondary region, even if the primary region becomes unavailable.
- Data is replicated across two distinct Azure regions.
- Provides read access to data in the secondary region.
- Higher cost than GRS due to read endpoint availability.
Memory trick: LRS, ZRS, GRS, RA-GRS: Know Your Data's Reach.