Examkin

Question

Difficulty: HardData Redundancy and High Availability

A retail company is designing the storage infrastructure for a new cloud-native order processing system. The system will store transaction logs in Azure Blob Storage. The storage solution must meet the following requirements:

- The data must be resilient to a datacenter outage within the primary region with zero data loss.
- The data must be replicated to a secondary region located at least 300 miles away.
- Analysts in the secondary region must be able to run read-only reporting queries against the replicated data at any time without impacting performance on the primary region and without initiating a storage account failover.

Which two configurations or actions should you recommend to meet the storage requirements? (Choose two.)

  1. Configure the storage account to use Read-Access Geo-Zone-Redundant Storage (RA-GZRS).Answer
  2. Direct the reporting applications to read data from the secondary endpoint of the storage account.Answer
  3. C
    Configure the storage account to use Read-Access Geo-Redundant Storage (RA-GRS).
  4. D
    Direct the reporting applications to write temporary query state data to the secondary endpoint.

Answer

To meet the requirements, you must configure the storage account to use Read-Access Geo-Zone-Redundant Storage (RA-GZRS) and direct the reporting applications to read data from the secondary endpoint of the storage account.
The correct options are configuring the storage account to use Read-Access Geo-Zone-Redundant Storage (RA-GZRS) and directing the reporting applications to read data from the secondary endpoint. RA-GZRS ensures zone redundancy in the primary region (protecting against a single datacenter outage) and replicates the data to a secondary region. The secondary endpoint allows read-only query access without initiating a failover.

Step-by-Step Solution

1
Analyze primary region redundancy requirements.
Since the data must survive a datacenter outage in the primary region with zero data loss, the primary replication must use Zone-Redundant Storage (ZRS), which replicates data across availability zones.
Locally Redundant Storage (LRS) replicates data within a single datacenter, making it vulnerable to a datacenter outage.
2
Analyze secondary region replication requirements.
The replication must copy data to a secondary region, which requires Geo-Redundant replication. Combining zonal redundancy in the primary region with geo-redundancy yields Geo-Zone-Redundant Storage (GZRS).
GZRS provides both zone-level resilience in the primary region and region-level resilience in the secondary region.
3
Analyze access requirements for the secondary region.
The reporting queries need read-only access to the secondary region without initiating failover. This requires Read-Access Geo-Zone-Redundant Storage (RA-GZRS) and routing queries to the secondary endpoint.
Standard GZRS only provides access to the secondary region after a customer-managed or Microsoft-managed failover is initiated.

Key Concept

Selecting the appropriate Azure Storage redundancy tier (LRS vs ZRS vs GRS vs GZRS vs RA-GRS vs RA-GZRS) based on regional, zonal, write/read access, and data loss constraints.
Rate this question

Topics

Data Redundancy and High Availability

More questions from this topic