A logistics company uploads daily vehicle tracking video feeds with an average file size o… — AWS Certified Solutions Architect - Associate

A logistics company uploads daily vehicle tracking video feeds with an average file size of $200\text{ MB}$ to an Amazon S3 Standard bucket. The videos are analyzed frequently by a machine learning model during the first $20\text{ days}$ following upload. For the next $5\text{ days}$ , the videos are occasionally reviewed by quality assurance teams. After $25\text{ days}$ total, the videos are no longer needed and must be permanently deleted. Which lifecycle configuration is the MOST cost-effective for managing these objects?

Keep the videos in Amazon S3 Standard for the entire $25\text{ days}$ , then use a lifecycle rule to permanently delete them.Cevap
B
Configure a lifecycle rule to transition the videos to Amazon S3 Standard-Infrequent Access (S3 Standard-IA) after $20\text{ days}$ , and permanently delete them after $25\text{ days}$ .
C
Configure a lifecycle rule to transition the videos to Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA) after $20\text{ days}$ , and permanently delete them after $25\text{ days}$ .
D
Configure a lifecycle rule to transition the videos to Amazon S3 Glacier Instant Retrieval after $20\text{ days}$ , and permanently delete them after $25\text{ days}$ .

Cevap

Keep the videos in Amazon S3 Standard for the entire 25 days, then use a lifecycle rule to permanently delete them.

Keeping the videos in Amazon S3 Standard for the entire 25 days is the most cost-effective configuration. Because the objects are deleted at day 25, transitioning them to Amazon S3 Standard-IA, One Zone-IA, or Glacier Instant Retrieval on day 20 means they would reside in those tiers for only 5 days. Since S3 Standard-IA and S3 One Zone-IA have a 30-day minimum storage duration, and S3 Glacier Instant Retrieval has a 90-day minimum storage duration, the company would be billed for the unused days up to the minimum limit. These penalties, combined with transition request fees, exceed the cost of simply keeping the data in S3 Standard for the full 25 days.

Adım Adım Çözüm

Analyze the lifecycle duration and requirements of the video files.

The files are stored in S3 Standard for 20 days, then accessed occasionally for 5 days, and must be permanently deleted at day 25.

This establishes the timeline of 25 days total storage duration before permanent deletion.

Evaluate the suitability and minimum billing constraints of S3 storage tiers.

S3 Standard has no minimum storage duration. S3 Standard-IA and S3 One Zone-IA have a 30-day minimum storage duration. S3 Glacier Instant Retrieval has a 90-day minimum storage duration.

Transitioning objects to S3 Standard-IA or One Zone-IA on day 20 and deleting them on day 25 means they are only stored in the destination tier for 5 days, which is less than the 30-day minimum.

Calculate and compare the cost of keeping the data in S3 Standard versus transitioning.

Transitioning to S3 Standard-IA or S3 One Zone-IA on day 20 for 5 days of storage results in paying for 30 days of storage plus transition fees. Keeping the data in S3 Standard for the full 25 days avoids these minimum duration penalties and transition fees, resulting in the lowest total cost.

Choosing the option that avoids minimum storage duration penalties guarantees the most cost-effective outcome.

Anahtar Kavram

Amazon S3 lifecycle transitions to storage classes with minimum storage durations (such as S3 Standard-IA, S3 One Zone-IA, and S3 Glacier) incur minimum billing duration penalties if the objects are deleted or transitioned again before the minimum period has elapsed.

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