A digital animation studio stores two types of files in an Amazon S3 bucket: * **Render In… — AWS Certified Solutions Architect - Associate

A digital animation studio stores two types of files in an Amazon S3 bucket:

* Render Input Assets: Average size of $12\text{ MB}$ . These files are generated daily and are needed for $15\text{ days}$ for potential re-rendering, after which they can be permanently deleted.
* Finished Master Videos: Average size of $8\text{ GB}$ . These files are accessed frequently during the first $30\text{ days}$ , accessed rarely for the next $60\text{ days}$ (but must be available immediately in milliseconds if requested), and then must be archived for $3\text{ years}$ for compliance. Retrieval within $12\text{ hours}$ is acceptable for archived files.

Which two actions should a solutions architect take to meet these requirements most cost-effectively?

Create a lifecycle rule for the Render Input Assets prefix to expire the objects after $15\text{ days}$ .Answer
Create a lifecycle rule for the Finished Master Videos prefix to transition the objects to S3 Standard-IA after $30\text{ days}$ , transition them to S3 Glacier Deep Archive after $90\text{ days}$ , and expire them after $3\text{ years}$ .Answer
C
Create a lifecycle rule for the Render Input Assets prefix to transition the objects to S3 Standard-IA after $7\text{ days}$ and expire them after $15\text{ days}$ .
D
Create a lifecycle rule for the Finished Master Videos prefix to transition the objects to S3 Glacier Flexible Retrieval after $30\text{ days}$ and keep them there for the remainder of the $3\text{ year}$ period.
E
Create a lifecycle rule for the Render Input Assets prefix to transition the objects to S3 Glacier Instant Retrieval after $5\text{ days}$ and expire them after $15\text{ days}$ .

Answer

The correct actions are to expire the Render Input Assets after 15 days without transitioning them, and to transition the Finished Master Videos to S3 Standard-IA after 30 days, to S3 Glacier Deep Archive after 90 days, and expire them after 3 years.

Expiring the Render Input Assets after 15 days is correct because keeping them in S3 Standard avoids the 30-day minimum storage charge penalty of S3 Standard-IA and the 90-day minimum storage charge penalty of S3 Glacier classes. Transitioning the Finished Master Videos to S3 Standard-IA after 30 days satisfies the millisecond latency and rare access requirements for the subsequent 60 days without incurring minimum duration penalties. Transitioning them to S3 Glacier Deep Archive after 90 days total meets the 12-hour recovery SLA for the remaining 3-year archive period at the lowest cost tier.

Step-by-Step Solution

Analyze the lifecycle requirements and file sizes of the Render Input Assets.

The files are

12\text{ MB}

and are deleted after

15\text{ days}

This determines if transitioning to other storage tiers is cost-effective under S3 minimum storage duration policies.

Evaluate S3 storage tier minimum duration constraints for the Render Input Assets.

S3 Standard-IA has a

30\text{ day}

minimum, and S3 Glacier tiers have a

90\text{ day}

180\text{ day}

minimum.

Since the assets are deleted at day 15, transitioning them to S3 Standard-IA or S3 Glacier would trigger minimum storage duration charges for the unused days, as well as transition charges. Thus, keeping them in S3 Standard and expiring them after 15 days is the most cost-effective approach.

Analyze the access pattern and compliance timeline of the Finished Master Videos.

They require frequent access for

30\text{ days}

, immediate access (millisecond latency) but rare usage for the next

60\text{ days}

(days 31 to 90), and long-term archiving for

3\text{ years}

with a

12\text{ hour}

retrieval SLA.

This maps the data to the appropriate storage classes based on latency, access frequency, minimum storage duration, and retrieval time.

Map the Finished Master Videos timeline to cost-optimized S3 storage tiers.

Transition to S3 Standard-IA after

30\text{ days}

(satisfies millisecond latency and rare access for 60 days, exceeding the 30-day minimum charge period). Transition to S3 Glacier Deep Archive after

90\text{ days}

total (satisfies the 12-hour archive retrieval requirement at the lowest storage cost for 3 years).

This matches the latency, cost, and retrieval SLA requirements of the master videos.

Key Concept

S3 Lifecycle management requires balancing transition costs and minimum storage durations against storage tier savings. S3 Standard-IA has a

30\text{ day}

minimum storage duration, and S3 Glacier Instant/Flexible Retrieval tiers have a

90\text{ day}

minimum storage duration, while S3 Glacier Deep Archive has a

180\text{ day}

minimum storage duration. Transitioning files that will be deleted before these minimum durations expire leads to cost penalties.

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Step-by-Step Solution

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