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Zorluk: ZorData Lifecycle Management and Retention

A healthcare software provider is designing a storage lifecycle strategy for medical imaging files stored in a general-purpose v2 (GPv2) Azure Blob storage account. The access patterns and requirements for the imaging files are as follows:

* For the first 30 days after creation, files are frequently accessed by clinicians and require immediate, sub-second retrieval.
* From day 31 to day 120, files are accessed occasionally for audits. Immediate, sub-second retrieval is still required during this period.
* After 120 days, files must be preserved for historical research. A retrieval latency of up to 15 hours is acceptable for these historical files.
* The solution must minimize storage and transaction costs.

Which lifecycle management policy configuration should you recommend?

  1. Transition blobs to the Cool tier 30 days after creation, and transition blobs to the Archive tier 120 days after creation.Cevap
  2. B
    Transition blobs to the Archive tier 30 days after creation, and transition blobs to the Cool tier 120 days after creation.
  3. C
    Transition blobs to the Cold tier 30 days after creation, and transition blobs to the Archive tier 90 days after creation.
  4. D
    Transition blobs to the Cool tier 30 days after creation, and transition blobs to the Archive tier 60 days after creation.

Cevap

Transition blobs to the Cool tier 30 days after creation, and transition blobs to the Archive tier 120 days after creation.
The policy that transitions blobs to the Cool tier after 30 days and to the Archive tier after 120 days is optimal. The Cool tier provides the necessary sub-second access for audit purposes from day 31 to day 120. Moving the data to the Archive tier at day 120 satisfies the 15-hour retrieval tolerance at the lowest storage cost. Because the data resides in the Cool tier for 90 days, it exceeds the Cool tier's 30-day minimum retention threshold, avoiding early deletion fees.

Adım Adım Çözüm

1
Analyze access latency requirements across all phases.
Immediate, sub-second retrieval is required from day 0 to day 120. A latency of up to 15 hours is acceptable after day 120.
This rules out placing any data in the Archive tier before day 120, as the Archive tier has retrieval latencies ranging from hours to days.
2
Evaluate storage tier choices for the day 31 to day 120 window.
The Cool tier is chosen over the Hot tier to optimize storage costs, and satisfies the sub-second access requirement.
Both Hot and Cool tiers provide sub-second access, but Cool is cheaper for storage and suitable for data accessed occasionally.
3
Check minimum retention constraints and early deletion charges.
Transitioning from Cool to Archive after 90 days (from day 30 to day 120) avoids early deletion fees.
The Cool tier has a 30-day minimum retention policy. Since the data remains in Cool for 90 days, it avoids charges. Using the Cold tier (90-day minimum retention) and transitioning early would incur penalty fees.

Anahtar Kavram

Designing lifecycle management policies that optimize costs by aligning data access tiers with retrieval latency limits and avoiding early deletion penalties.
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Konular

Data Lifecycle Management and Retention

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