A smart manufacturing company collects and stores operational data in a single Amazon S3 b… — AWS Certified Solutions Architect - Associate

A smart manufacturing company collects and stores operational data in a single Amazon S3 bucket. The data consists of two categories:

* IoT Sensor Telemetry: Average file size is $8\text{ KB}$ . These files are generated continuously and analyzed in real-time. They are rarely accessed after $10\text{ days}$ but must be retained for a total of $25\text{ days}$ for compliance audits, after which they can be deleted.
* Machinery Firmware Images: Average file size is $20\text{ MB}$ . These files are accessed frequently during the first $30\text{ days}$ after release and rarely thereafter. They must be retained for $365\text{ days}$ for rollback purposes, after which they can be deleted.

Which lifecycle configuration is the most cost-effective to meet these requirements?

For telemetry data, create a lifecycle rule to expire objects after $25\text{ days}$ . For firmware images, create a lifecycle rule to transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after $30\text{ days}$ and expire them after $365\text{ days}$ .Cevap
B
For telemetry data, create a lifecycle rule to transition objects to S3 Standard-IA after $10\text{ days}$ and expire them after $25\text{ days}$ . For firmware images, create a lifecycle rule to transition objects to S3 Standard-IA after $30\text{ days}$ and expire them after $365\text{ days}$ .
C
For telemetry data, create a lifecycle rule to expire objects after $25\text{ days}$ . For firmware images, create a lifecycle rule to transition objects to S3 Standard-IA after $10\text{ days}$ and expire them after $365\text{ days}$ .
D
For telemetry data, create a lifecycle rule to transition objects to S3 Standard-IA after $20\text{ days}$ and expire them after $25\text{ days}$ . For firmware images, create a lifecycle rule to transition objects to S3 Standard-IA after $30\text{ days}$ and expire them after $365\text{ days}$ .

Cevap

For telemetry data, configure a lifecycle rule to expire objects after

25\text{ days}

without transitioning them. For firmware images, configure a lifecycle rule to transition them to S3 Standard-IA after

30\text{ days}

and expire them after

365\text{ days}

The correct configuration leaves telemetry files in S3 Standard for the duration of their lifecycle (

25\text{ days}

) and expires them directly. This avoids both the

128\text{ KB}

minimum billing size penalty (since their actual size is

8\text{ KB}

) and the

30\text{-day}

minimum storage duration penalty of S3 Standard-IA. The firmware images are large (

20\text{ MB}

) and reside in S3 Standard-IA for

335\text{ days}

after the initial

30\text{ days}

of frequent access, maximizing storage savings with zero penalties.

Adım Adım Çözüm

Analyze the telemetry data properties and constraints.

The telemetry files are very small (

8\text{ KB}

) and are kept for only

25\text{ days}

before deletion.

We must evaluate if transitioning them to S3 Standard-IA is cost-effective. Since the files are less than the

128\text{ KB}

minimum storage size limit of S3 Standard-IA and are kept in that tier for only

15\text{ days}

(violating the

30\text{-day}

minimum storage duration), they should remain in S3 Standard.

Analyze the firmware images properties and constraints.

The firmware files are large (

20\text{ MB}

) and are kept for

365\text{ days}

. They are frequently accessed only during the first

30\text{ days}

of release.

Transitioning them to S3 Standard-IA after

30\text{ days}

is highly cost-effective because the file size exceeds

128\text{ KB}

, and the remaining storage duration (

335\text{ days}

) comfortably exceeds the

30\text{-day}

minimum requirement.

Combine the rules into a single lifecycle configuration.

Prefix-based rules: `telemetry/` expires after

25\text{ days}

; `firmware/` transitions to S3 Standard-IA after

30\text{ days}

and expires after

365\text{ days}

Using prefix-based rules allows separate lifecycle paths for different types of data in the same bucket.

Anahtar Kavram

S3 Lifecycle Management Cost Constraints

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

Sık Yapılan Hatalar

Konular