A fleet management company collects data from delivery trucks and stores it in Amazon S3. … — AWS Certified Solutions Architect - Associate

A fleet management company collects data from delivery trucks and stores it in Amazon S3. The data consists of two types of files:

* Vehicle telematics data: Millions of small JSON files averaging $10\text{ KB}$ in size. These files are accessed frequently during the first $14$ days, and must be retained for $90$ days.
* Dashcam video recordings: Large MP4 files averaging $500\text{ MB}$ in size. These files are accessed frequently during the first $15$ days for safety reviews, and must be archived for a total of $60$ days for compliance audits. When an audit occurs, these videos must be retrievable within minutes.

Which two storage configurations will meet these requirements at the lowest cost?

Keep the vehicle telematics data in S3 Standard, and configure a lifecycle rule to delete the objects after $90$ days.Answer
Configure a lifecycle rule for the dashcam video recordings to transition them to S3 Standard-IA after $15$ days, and delete them after $60$ days.Answer
C
Configure a lifecycle rule for the vehicle telematics data to transition them to S3 Standard-IA after $14$ days, and delete them after $30$ days.
D
Configure a lifecycle rule for the dashcam video recordings to transition them to S3 Glacier Flexible Retrieval after $15$ days, and use Standard retrieval when an audit occurs.
E
Route the dashcam video uploads from private EC2 instances through a NAT Gateway to S3 Standard, and configure a lifecycle rule to transition them to S3 Standard-IA after $15$ days.

Answer

Keeping the vehicle telematics data in S3 Standard and deleting it after

90

days, and configuring a lifecycle rule for the dashcam video recordings to transition them to S3 Standard-IA after

15

days and deleting them after

60

days.

The correct solution keeps the small telematics files in S3 Standard because their

10\text{ KB}

size would trigger the

128\text{ KB}

minimum billing penalty if transitioned to S3 Standard-IA. Conversely, the

500\text{ MB}

video files are large enough to avoid the minimum size penalty, and transitioning them to S3 Standard-IA after

15

days leaves them in S3 Standard-IA for

45

days (satisfying the

30

-day minimum storage duration limit) while still ensuring millisecond-level retrievals.

Step-by-Step Solution

Evaluate the vehicle telematics data storage strategy based on file size and retention constraints.

The telematics files average

10\text{ KB}

, which is well below the S3 Standard-IA minimum billing size threshold of

128\text{ KB}

. Storing these files in S3 Standard-IA would result in a

1,280\%

billed size penalty per object. Therefore, they should remain in S3 Standard and be deleted after

90

days.

To avoid paying for minimum billing size overhead and transition costs on small objects.

Evaluate the dashcam video recordings storage strategy based on retrieval time, file size, and retention constraints.

The videos average

500\text{ MB}

(above the

128\text{ KB}

minimum size) and need to be stored for

60

days total. Frequent access ends after

15

days. Transitioning them to S3 Standard-IA after

15

days means they are stored there for

45

days, which exceeds the

30

-day minimum storage duration of S3 Standard-IA, avoiding early deletion penalties. S3 Standard-IA also satisfies the requirement for millisecond-level (minutes-range) retrievals.

To minimize storage costs for large, infrequently accessed files requiring rapid retrieval.

Verify network routing and check compliance of alternative storage tiers.

Glacier tiers fail the retrieval time requirement, and routing large uploads through a NAT Gateway adds unnecessary data processing charges.

To ensure both cost efficiency and compliance with the retrieval SLA.

Key Concept

S3 Storage Class Analysis, billing minimums (

128\text{ KB}

for S3 Standard-IA), and storage duration minimums (

30

days for S3 Standard-IA).

Estimated Time:2m 0s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Topics