A cloud-based education platform stores video lesson project files and their historical ed… — AWS Certified Solutions Architect - Associate

A cloud-based education platform stores video lesson project files and their historical edit versions in an Amazon S3 bucket with versioning enabled. The current versions of the project files average $8\text{ MB}$ in size and are accessed frequently during the first $35$ days of editing. After $35$ days, they are rarely accessed but must be retained for $2\text{ years}$ ( $730\text{ days}$ ) for compliance, requiring millisecond retrieval. The noncurrent (historical) versions average $2\text{ MB}$ in size and are rarely accessed immediately after becoming noncurrent. These historical versions must be retained for $120$ days for recovery purposes and must be retrievable within $5$ hours.

Which combination of S3 Lifecycle actions will meet these requirements in the most cost-effective manner? (Select TWO.)

Transition current versions to Amazon S3 Glacier Instant Retrieval after $35$ days.Answer
Transition noncurrent versions to Amazon S3 Glacier Flexible Retrieval after $0$ days.Answer
C
Transition current versions to Amazon S3 Standard-Infrequent Access (S3 Standard-IA) after $15$ days.
D
Transition noncurrent versions to Amazon S3 Standard-Infrequent Access (S3 Standard-IA) after $0$ days and permanently delete them after $25$ days.
E
Transition noncurrent versions to Amazon S3 Glacier Deep Archive after $0$ days and permanently delete them after $120$ days.

Answer

Configure S3 Lifecycle rules to transition current versions to Amazon S3 Glacier Instant Retrieval after

35

days, and transition noncurrent versions to Amazon S3 Glacier Flexible Retrieval after

0

days.

Transitioning the current versions of the project files to Amazon S3 Glacier Instant Retrieval after

35

days is the most cost-effective option because it matches the end of the frequent access period, provides the required millisecond retrieval, and satisfies the

90

-day minimum storage duration rule (retained for

2\text{ years}

). Transitioning the noncurrent versions to Amazon S3 Glacier Flexible Retrieval after

0

days immediately minimizes storage costs for rarely accessed data, meets the

5

-hour retrieval window via standard retrieval (takes

3

5

hours), and satisfies the

90

-day minimum storage duration rule (retained for

120

days).

Step-by-Step Solution

Analyze the storage requirements and access patterns for current versions.

The current versions average

8\text{ MB}

(exceeding the

128\text{ KB}

minimum size limit), are frequently accessed for the first

35

days, and require millisecond retrieval after that for a total of

2\text{ years}

This determines that current versions must remain in S3 Standard for

35

days to avoid retrieval fees, and should then transition to S3 Glacier Instant Retrieval. This class provides millisecond retrieval and the retention period (

2\text{ years}

) easily exceeds the

90

-day minimum storage duration.

Analyze the storage requirements and access patterns for noncurrent versions.

Noncurrent versions average

2\text{ MB}

(exceeding the

128\text{ KB}

minimum size limit), are rarely accessed immediately, must be kept for

120

days, and can tolerate a retrieval time of up to

5

hours.

This indicates that noncurrent versions can be transitioned to a cheaper archive class immediately (

0

days). S3 Glacier Flexible Retrieval (standard retrieval takes

3

5

hours) meets the

5

-hour requirement, and the

120

-day retention period satisfies the

90

-day minimum storage duration.

Evaluate the distractors against S3 minimum storage duration limits and retrieval constraints.

Transitioning current versions after

15

days incurs high retrieval fees. Transitioning noncurrent versions to S3 Standard-IA and deleting after

25

days violates the

30

-day minimum storage duration. Transitioning to Glacier Deep Archive and deleting after

120

days violates the

180

-day minimum storage duration and fails the retrieval SLA.

This confirms that options involving premature transitions, early deletion penalties, or slow retrieval options are suboptimal.

Key Concept

Selecting the optimal S3 storage class and transition timing based on object size, retention periods, minimum storage durations, and retrieval time constraints.

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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