A digital marketing firm processes web interaction logs that are saved to an Amazon S3 buc… — AWS Certified Solutions Architect - Associate

A digital marketing firm processes web interaction logs that are saved to an Amazon S3 bucket. The logs average $15\text{ KB}$ in size. These files are frequently accessed during the first $10\text{ days}$ for campaign optimization. After $10\text{ days}$ , access drops significantly, but the files must be kept for an additional $10\text{ days}$ (total of $20\text{ days}$ from creation) before being permanently deleted. Which two configurations should the solutions architect implement to achieve the most cost-effective storage strategy? (Select TWO.)

A
Create an S3 Lifecycle rule to transition the objects from S3 Standard to S3 Standard-Infrequent Access (S3 Standard-IA) after $10\text{ days}$ .
Keep the log files in S3 Standard for the entire $20\text{ days}$ without transitioning them to another S3 storage class.Answer
Create an S3 Lifecycle rule to expire the objects $20\text{ days}$ after creation.Answer
D
Create an S3 Lifecycle rule to transition the objects from S3 Standard to Amazon S3 Glacier Instant Retrieval after $10\text{ days}$ .
E
Create an S3 Lifecycle rule to transition the objects from S3 Standard to S3 Intelligent-Tiering after $10\text{ days}$ .

Answer

The solutions architect should keep the log files in S3 Standard for the entire duration and create an S3 Lifecycle rule to expire the objects after 20 days.

Keeping the log files in S3 Standard for the entire lifecycle is correct because the files are small (

15\text{ KB}

) and have a short total retention period of

20\text{ days}

. Transitioning them to S3 Standard-IA or Glacier Instant Retrieval would trigger minimum storage size billing (

128\text{ KB}

) and early deletion charges (due to

30\text{ day}

90\text{ day}

minimums). Configuring an S3 Lifecycle rule to expire the objects after

20\text{ days}

is correct because it automates deletion to prevent ongoing storage charges once the retention requirement is met.

Step-by-Step Solution

Analyze the size of the individual objects and their access pattern.

The individual files average

15\text{ KB}

, which is well below the

128\text{ KB}

minimum storage size threshold for S3 Standard-IA and S3 Glacier tiers. Transitioning these objects to these tiers would result in being billed for

128\text{ KB}

per object.

Understanding object size constraints prevents cost inflation from minimum storage size requirements.

Evaluate the storage duration against S3 storage class minimum duration rules.

The files are deleted after

20\text{ days}

. S3 Standard-IA has a minimum storage duration of

30\text{ days}

, and S3 Glacier tiers have a minimum storage duration of

90\text{ days}

or more. Deleting them at day 20 incurs early deletion penalties.

Determining retention rules avoids early deletion charge penalties.

Formulate the most cost-effective tiering and deletion strategy.

Keep the objects in S3 Standard to avoid minimum storage size and duration penalties, and apply a lifecycle expiration rule to delete them after

20\text{ days}

to stop storage costs immediately.

Combining S3 Standard retention with automated expiration optimizes both storage tier charges and deletion lifecycle.

Key Concept

S3 Lifecycle and Storage Class Constraints (Minimum Object Size and Storage Duration)

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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