A hospital needs to store 500 TB of patient X-ray images in Azure Blob Storage.

The access pattern is as follows:

Images are accessed frequently during the first 30 days.

From day 31 to 180, images are rarely accessed but must be available immediately if requested.

After 180 days, images are retained for 7 years for compliance but are almost never accessed. Retrieval can take up to 12 hours.

You need to design a storage solution that minimizes costs while meeting performance requirements. What should you recommend?

Answer options:

Use a General Purpose v2 storage account. Create a lifecycle management policy to move blobs to Cool tier after 30 days, and to Archive tier after 180 days.

Use a Premium Block Blob storage account. Create a lifecycle management policy to move blobs to Cool tier after 30 days, and to Archive tier after 180 days.

Use a General Purpose v2 storage account. Create an Azure Automation runbook to move blobs to Cold tier after 30 days, and to Archive tier after 180 days.

Use a General Purpose v2 storage account set to the Archive tier by default. Move blobs to Hot tier when requested.

How to approach this question

Map the timeframes to the storage tiers: 0-30 days (Hot), 31-180 days (Cool), >180 days (Archive). Use native lifecycle policies to automate.

Full Answer

A.Use a General Purpose v2 storage account. Create a lifecycle management policy to move blobs to Cool tier after 30 days, and to Archive tier after 180 days.✓ Correct

Azure Blob Storage lifecycle management offers a rule-based policy that you can use to transition blob data to the appropriate access tiers or expire data at the end of the data lifecycle. The Hot tier is for frequent access. The Cool tier is for infrequent access but requires immediate availability. The Archive tier is the cheapest storage but has the highest retrieval costs and latency (up to 15 hours). General Purpose v2 accounts support all these tiers.

Common mistakes

Selecting Premium Block Blobs, not realizing that Premium storage does not support tiering to Cool or Archive.

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Practice the full Azure Solutions Architect Expert AZ-305 Practice Exam 1

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