Question

Difficulty: MediumData Redundancy and High Availability

An online education platform is designing a storage solution for video course materials using Azure Blob Storage. The solution must meet the following requirements:
- Replicate data across three availability zones in the primary region to protect against a zone outage.
- Replicate data to a secondary region to protect against a regional disaster.
Which two redundancy configuration options should you recommend? (Select two.)

  1. Geo-zone-redundant storage (GZRS)Answer
  2. Read-access geo-zone-redundant storage (RA-GZRS)Answer
  3. C
    Geo-redundant storage (GRS)
  4. D
    Zone-redundant storage (ZRS)
  5. E
    Locally redundant storage (LRS)

Answer

Geo-zone-redundant storage (GZRS) and Read-access geo-zone-redundant storage (RA-GZRS)
The correct options are Geo-zone-redundant storage (GZRS) and Read-access geo-zone-redundant storage (RA-GZRS). These tiers replicate data across three Azure availability zones in the primary region, which protects against zone outages, and asynchronously replicate it to a secondary region, which protects against regional disasters.

Step-by-Step Solution

1
Analyze primary region resiliency requirement
The requirement to protect against a zone outage in the primary region requires zone-redundant options (ZRS, GZRS, or RA-GZRS). Locally redundant (LRS) and geo-redundant (GRS) options are eliminated because they replicate locally within a single zone in the primary region.
Ensuring the data is spread across multiple availability zones in the primary region.
2
Analyze regional disaster recovery requirement
The requirement to protect against a regional disaster requires geo-replication to a secondary region. This eliminates Zone-redundant storage (ZRS).
Ensuring data is copied to a separate geographic region.
3
Select matching redundancy configurations
Both Geo-zone-redundant storage (GZRS) and Read-access geo-zone-redundant storage (RA-GZRS) replicate across three zones in the primary region and copy data to a secondary region, fulfilling all criteria.
Finding the storage tiers that satisfy both zonal and regional replication requirements.

Key Concept

Choosing Azure Storage replication options that combine zone-redundancy and geo-redundancy.
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