Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
You are designing storage for a global media-sharing app that will store terabytes of video in an Azure Storage account. The design must meet these goals:
Reads must remain available if Microsoft fails over the entire primary Azure region.
Writes must stay available and fully durable if one availability zone in the primary region goes down.
The regional recovery point objective (RPO) must not exceed 15 minutes.
Which Azure Storage redundancy option should you choose?
Deploy the storage account only in the paired region and use zone-redundant storage (ZRS).
Configure the storage account for geo-redundant storage (GRS) and enable blob soft delete.
Configure the storage account for read-access geo-zone-redundant storage (RA-GZRS).
Use Azure Data Lake Storage Gen2 with locally redundant storage (LRS) and schedule AzCopy jobs to another region every six hours.
Read-access geo-zone-redundant storage (RA-GZRS) keeps data synchronously replicated across three separate availability zones in the primary region, so writes remain durable and available if any single zone fails. It also copies data asynchronously to the paired secondary region and exposes that replica for read access, allowing the application to continue reading during a regional outage. Microsoft states that GZRS and RA-GZRS provide a regional RPO of up to 15 minutes, satisfying the specified requirement. Other options lack either zone-level write durability (GRS, LRS + AzCopy) or cross-region readability (ZRS).
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Microsoft Azure Solutions Architect Expert AZ-305
Design business continuity solutions
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