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Difficulty: EasyBlob, File, and Disk Storage Solutions

You are designing a storage solution for database backup files in Azure. The solution must meet the following requirements:

* Ensure the backup files remain available if a single datacenter within the primary Azure region experiences an outage.
* Minimize storage costs.
* Provide sub-second retrieval times for the backups.

Which two configurations should you select for the storage account? (Choose two.)

  1. Zone-redundant storage (ZRS)Answer
  2. Cool access tierAnswer
  3. C
    Locally-redundant storage (LRS)
  4. D
    Archive access tier

Answer

Zone-redundant storage (ZRS) and Cool access tier
To survive a single datacenter outage while minimizing costs, the storage account must be configured with Zone-redundant storage (ZRS). To store infrequently accessed backup files cost-effectively with sub-second retrieval capability, the Cool access tier must be selected.

Step-by-Step Solution

1
Determine the required redundancy option based on availability requirements.
Since the backups must survive a single datacenter outage within the region, Zone-redundant storage (ZRS) is required. Locally-redundant storage (LRS) does not provide this protection.
ZRS replicates data across three separate availability zones within a region to safeguard against datacenter failures.
2
Determine the appropriate access tier based on cost and latency requirements.
Cool tier is the optimal choice because it is cost-effective for backup data and provides sub-second latency. Archive tier is incorrect because it has high rehydration latency.
To meet the sub-second retrieval requirement while minimizing costs for infrequently accessed data, the Cool tier is ideal.

Key Concept

Selecting Azure storage redundancy and access tiers based on availability, cost, and latency requirements.
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Topics

Blob, File, and Disk Storage Solutions

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