An advertising technology company stores two types of data in a single Amazon S3 bucket: *… — AWS Certified Solutions Architect - Associate

An advertising technology company stores two types of data in a single Amazon S3 bucket:

* Clickstream telemetry data: Average file size of $30\text{ KB}$ . Millions of files are uploaded daily. The data is accessed frequently for the first $14\text{ days}$ for real-time campaign optimization and is deleted permanently after $25\text{ days}$ .
* Ad campaign video assets: Average file size of $800\text{ MB}$ . The assets are accessed heavily during the first $30\text{ days}$ of a campaign, are rarely accessed after that, and must be retained for $5\text{ years}$ for audit purposes.

Which configuration represents the most cost-effective storage tiering and lifecycle strategy for these files?

A
Configure a lifecycle policy to transition the clickstream telemetry data to S3 Standard-IA after $14\text{ days}$ and delete it after $25\text{ days}$ . For the video assets, configure a lifecycle policy to transition them to S3 Standard-IA after $30\text{ days}$ and then to S3 Glacier Flexible Retrieval after $1\text{ year}$ .
B
Enable S3 Intelligent-Tiering on the S3 bucket with a lifecycle rule to delete the clickstream telemetry data after $25\text{ days}$ and transition the video assets to S3 Glacier Deep Archive after $5\text{ years}$ .
Configure a lifecycle policy to keep the clickstream telemetry data in S3 Standard and delete it after $25\text{ days}$ . For the video assets, configure a lifecycle policy to transition them directly to S3 Glacier Deep Archive after $30\text{ days}$ .Answer
D
Configure a lifecycle policy to transition the clickstream telemetry data to S3 Glacier Instant Retrieval after $14\text{ days}$ and delete it after $25\text{ days}$ . For the video assets, configure a lifecycle policy to transition them directly to S3 Glacier Deep Archive after $30\text{ days}$ .

Answer

Keep clickstream telemetry in S3 Standard and delete it after

25\text{ days}

; transition video assets directly to S3 Glacier Deep Archive after

30\text{ days}

The correct option is to keep the clickstream telemetry data in S3 Standard and transition the video assets directly to S3 Glacier Deep Archive after

30\text{ days}

. This avoids early deletion penalties and the minimum object size capacity charges for the clickstream files (which are only

30\text{ KB}

in size and are deleted after

25\text{ days}

), while securing the lowest storage rate for the large video assets (

800\text{ MB}

) that are rarely accessed after

30\text{ days}

and must be archived for

5\text{ years}

Step-by-Step Solution

Evaluate storage requirements for clickstream telemetry data.

Clickstream data has a small average file size (

30\text{ KB}

) and a short lifespan (

25\text{ days}

Transitioning objects under

128\text{ KB}

to S3 Standard-IA or Glacier Instant Retrieval results in paying for the minimum capacity charge of

128\text{ KB}

per object. Furthermore, deleting them at day

25

(only

11\text{ days}

after transitioning at day

14

) violates the minimum storage duration rules (

30\text{ days}

for Standard-IA,

90\text{ days}

for Glacier Instant Retrieval), triggering early deletion charges. Transition request costs for millions of small files also exceed potential storage savings. Therefore, clickstream data must remain in S3 Standard until deletion.

Evaluate storage requirements for ad campaign video assets.

Video assets are large (

800\text{ MB}

), rarely accessed after

30\text{ days}

, and must be retained for

5\text{ years}

Since the video assets are large and rarely accessed after the initial

30\text{ days}

, transitioning them to S3 Glacier Deep Archive after

30\text{ days}

is highly cost-effective. The

5\text{ -year}

retention period easily satisfies S3 Glacier Deep Archive's

180\text{ -day}

minimum storage duration rule, minimizing storage costs to the absolute lowest rate (

0.00099\text{ USD/GB/month}

Combine the evaluations into a single, cost-optimal lifecycle policy.

S3 Standard with deletion at day

25

for telemetry; transition to S3 Glacier Deep Archive at day

30

for video assets.

This strategy avoids all minimum storage duration and size penalties for the small files while achieving the lowest possible storage rate for the large video files, representing the most cost-optimized lifecycle configuration.

Key Concept

Amazon S3 Lifecycle Policies and Storage Tier Cost Optimization

Estimated Time:2m 0s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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