AZ-104 Certification Practice Question #11

Question

Your company has a Microsoft Azure subscription.
The company has datacenters in Los Angeles and New York.
You are configuring the two datacenters as geo-clustered sites for site resiliency.
You need to recommend an Azure storage redundancy option.
You have the following data storage requirements:
✑ Data must be stored on multiple nodes.
✑ Data must be stored on nodes in separate geographic locations.
✑ Data can be read from the secondary location as well as from the primary location.
Which of the following Azure stored redundancy options should you recommend?

Accepted Answer

To satisfy all three requirements, the data must be replicated across separate geographic locations and must be readable from the secondary location under normal operations (not just after a failover). Locally Redundant Storage (LRS) and Zone-Redundant Storage (ZRS) only replicate within a single region, failing the geographic separation requirement. While Geo-Redundant Storage (GRS) replicates across regions, the secondary region is not readable unless a failover occurs. Read-Access Geo-Redundant Storage (RA-GRS) — sometimes referred to in exam questions as "Read-only geo-redundant storage" because secondary access is read-only — satisfies all conditions by keeping the secondary location always readable.

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