AZ-104 Question 81
Single answerYour company hosts a mission-critical application in Azure that must retain high availability even if the entire primary region goes offline. The business needs to minimize cost while ensuring the data remains accessible for read operations from a secondary region when the primary region is not reachable. Which Azure Storage redundancy option should you configure?
- A
Locally Redundant Storage (LRS)
- B
Zone-Redundant Storage (ZRS)
- C
Geo-Redundant Storage (GRS)
- D
Read-Access Geo-Redundant Storage (RA-GRS)
Show answer and explanation
Correct answer: D
Explanation
To ensure high availability across regions and maintain read access during a primary region outage, RA-GRS is the best option. It replicates data to another region and enables read access from the secondary region at any time.
- A. Incorrect.
LRS only maintains multiple copies of data within a single data center in one region and does not provide protection against a regional outage.
- B. Incorrect.
ZRS stores copies of data across availability zones within the same region, but it does not replicate to another region, leaving the data vulnerable if the entire region is down.
- C. Incorrect.
GRS replicates data to a secondary region for disaster recovery, but it does not allow read operations from the secondary endpoint unless there's a failover.
- D. Correct.
RA-GRS replicates data to a secondary region and also allows read access to the data from that secondary region without requiring a failover.