Storage tier optimization in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ service_behavior

intermediate

Understanding Azure Blob Storage Access Tiers

Which Azure Blob Storage access tier is best suited for data that is accessed less than once a month but requires immediate availability when accessed?

A Premium tier

B Hot tier

C Cool tier

D Archive tier

💡 Hint

Think about balancing cost and access frequency for rarely accessed data.

The Cool tier is optimized for data accessed infrequently, about once a month or less, but still requires immediate availability without retrieval delay.

❓ Architecture

intermediate

Choosing Storage Tiers for Backup Data

You need to design a backup solution in Azure for data that must be retained for years but is rarely accessed. Which storage tier should you choose to minimize cost while ensuring data durability?

A Archive tier

B Hot tier

C Cool tier

D Standard HDD managed disks

💡 Hint

Consider the lowest cost option for long-term retention with infrequent access.

The Archive tier offers the lowest storage cost for data that is rarely accessed and can tolerate retrieval delays, making it ideal for long-term backups.

❓ Configuration

advanced

Configuring Lifecycle Management for Blob Storage

Given the following lifecycle management rule JSON snippet, what will happen to blobs that have not been modified for 90 days?

{
  "rules": [
    {
      "name": "moveToCool",
      "type": "Lifecycle",
      "definition": {
        "filters": {
          "blobTypes": ["blockBlob"]
        },
        "actions": {
          "baseBlob": {
            "tierToCool": {"daysAfterModificationGreaterThan": 90}
          }
        }
      },
      "enabled": true
    }
  ]
}

A Blobs older than 90 days will be deleted automatically.

B Blobs older than 90 days will be moved to the Cool tier automatically.

C Blobs older than 90 days will be moved to the Archive tier automatically.

D No action will be taken because the rule is disabled.

💡 Hint

Look at the action specified under tierToCool.

The lifecycle rule moves block blobs to the Cool tier if they have not been modified for more than 90 days. The rule is enabled, so the action will occur automatically.

❓ security

advanced

Securing Data in Archive Tier

Which of the following is a best practice to ensure data security for blobs stored in the Archive tier in Azure Blob Storage?

A Use Azure Storage Service Encryption (SSE) with customer-managed keys.

B Disable encryption since Archive tier is already secure by default.

C Store data without access policies to improve retrieval speed.

D Use public access to allow easy data sharing.

💡 Hint

Think about encryption and control over keys for sensitive data.

Using Azure Storage Service Encryption with customer-managed keys provides enhanced security and control over encryption keys, which is a best practice for sensitive data in any tier including Archive.

✅ Best Practice

expert

Optimizing Cost with Automated Tiering

You manage a large dataset in Azure Blob Storage with varying access patterns. You want to minimize costs by automatically moving blobs between Hot, Cool, and Archive tiers based on usage. Which approach best achieves this?

A Manually move blobs between tiers using Azure Portal every month.

B Use Azure Files instead of Blob Storage for automatic tiering.

C Set all blobs to Archive tier and restore them manually when needed.

D Use Azure Blob Storage lifecycle management policies with rules for tier transitions based on last modified date.

💡 Hint

Consider automation features provided by Azure Blob Storage.

Azure Blob Storage lifecycle management policies allow automatic tier transitions based on rules such as last modified date, enabling cost optimization without manual intervention.