AZ-104 Question 73
Single answerYour organization wants to store mission-critical data in an Azure Storage account with minimal downtime even if the entire primary region becomes unavailable. They also want to keep the data accessible for read operations by using a secondary region if the primary region fails. Which replication strategy should you configure on the storage account to meet these requirements?
- A
Locally redundant storage (LRS)
- B
Zone-redundant storage (ZRS)
- C
Geo-redundant storage (GRS)
- D
Read-access geo-zone-redundant storage (RA-GZRS)
Show answer and explanation
Correct answer: D
Explanation
Read-access geo-zone-redundant storage (RA-GZRS) offers the highest level of resilience by combining zone redundancy within the primary region with geographic replication to a secondary region. This allows continued read operations if the primary region is offline, thereby ensuring minimal downtime and continuous data availability.
- A. Incorrect.
LRS stores multiple synchronous copies of the data in a single data center within one region. It does not protect against region-wide outages.
- B. Incorrect.
ZRS replicates data across availability zones within the same region, protecting against data center failures but not full region outages.
- C. Incorrect.
GRS replicates data across regions for disaster recovery. However, you cannot read from the secondary region unless Microsoft initiates a failover.
- D. Correct.
RA-GZRS provides replication across multiple zones in the primary region and a secondary geographic region, while also enabling read access from the secondary region at any time.