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Zorluk: ZorCost-Optimized Storage Tiering and Lifecycle Management

A healthcare provider stores two types of data in a single Amazon S3 bucket:

* Clinical Imaging Data (DICOM): The average file size is 20 MB20\text{ MB}. These files are accessed frequently by clinicians for the first 4040 days. After 4040 days, access drops significantly, but images must be retrievable within 44 hours for follow-up appointments. The images must be retained for 77 years (25552555 days).
* System Access Logs: The average file size is 10 KB10\text{ KB}. These logs are analyzed daily for security audits during the first 1515 days. After 1515 days, they are rarely accessed, but must be retained for 11 year (365365 days) for regulatory compliance.

Which two lifecycle configurations will meet these requirements in the most cost-effective manner? (Select TWO.)

  1. Configure a lifecycle rule for the Clinical Imaging Data to transition objects from S3 Standard to S3 Glacier Flexible Retrieval after 4040 days, and expire them after 25552555 days.Cevap
  2. Keep the System Access Logs in S3 Standard, and configure a lifecycle rule to expire the objects after 365365 days.Cevap
  3. C
    Configure a lifecycle rule for the Clinical Imaging Data to transition objects from S3 Standard to S3 Standard-IA after 4040 days, transition them to S3 Glacier Flexible Retrieval after 6060 days, and expire them after 25552555 days.
  4. D
    Configure a lifecycle rule for the System Access Logs to transition objects from S3 Standard to S3 Standard-IA after 1515 days, and expire them after 365365 days.
  5. E
    Configure a lifecycle rule for the System Access Logs to transition objects from S3 Standard to S3 Glacier Flexible Retrieval after 1515 days, and expire them after 365365 days.

Cevap

Configure a lifecycle rule for the Clinical Imaging Data to transition objects from S3 Standard to S3 Glacier Flexible Retrieval after 40 days and expire them after 2555 days, and keep the System Access Logs in S3 Standard, configuring a lifecycle rule to expire the objects after 365 days.
Transitioning the Clinical Imaging Data directly from S3 Standard to S3 Glacier Flexible Retrieval after 40 days is highly cost-effective because the average file size of 20 MB is well above the 128 KB minimum storage threshold, and standard retrieval (which takes 3-5 hours) satisfies the 4-hour retrieval requirement. Keeping the System Access Logs in S3 Standard and expiring them after 365 days is correct because the average file size is 10 KB, which is below the 128 KB minimum size threshold for S3 Standard-IA and S3 Glacier. Transitioning these small files to a lower-cost storage class would incur a storage charge penalty for 128 KB per object, making it significantly more expensive than keeping them in S3 Standard.

Adım Adım Çözüm

1
Analyze the file sizes and access patterns for both datasets.
Clinical Imaging Data files are large (20 MB) and accessed frequently for 40 days, then rarely accessed but must be retrievable within 4 hours. System Access Logs are very small (10 KB) and accessed frequently for 15 days, then rarely accessed.
Understanding file sizes and access requirements is critical for identifying potential minimum size penalties and retrieval time constraints.
2
Evaluate storage tier options for the Clinical Imaging Data.
Transitioning directly to S3 Glacier Flexible Retrieval after 40 days is optimal because the 20 MB files exceed the 128 KB minimum size threshold, and the 3-5 hour retrieval window meets the 4-hour requirement.
Bypassing S3 Standard-IA prevents paying transition and storage fees for an intermediate class when Glacier already meets the retrieval SLA.
3
Evaluate storage tier options for the System Access Logs.
Transitioning to S3 Standard-IA or S3 Glacier is cost-ineffective due to the 128 KB minimum storage billing limit on those tiers. The most cost-optimized strategy is to retain them in S3 Standard and expire them after 365 days.
Transitioning 10 KB files to a tier with a 128 KB minimum threshold results in paying for 12.8 times the actual storage consumed, violating cost optimization principles.

Anahtar Kavram

Understanding S3 lifecycle transitions, minimum storage durations, and minimum object size billing thresholds to design cost-effective storage strategies.
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Konular

Cost-Optimized Storage Tiering and Lifecycle Management