A genomic research laboratory runs sequencing pipelines on Amazon EC2 instances in a priva… — AWS Certified Solutions Architect - Associate

A genomic research laboratory runs sequencing pipelines on Amazon EC2 instances in a private subnet. The pipelines generate raw sequence files of approximately $150\text{ MB}$ each, which are stored in an Amazon S3 bucket. The data is accessed frequently and must be available immediately for the first $15\text{ days}$ . After $15\text{ days}$ , the files are rarely accessed but must be retained for at least $120\text{ days}$ to meet regulatory compliance requirements. Audits can tolerate a retrieval time of up to $5\text{ hours}$ .

Which TWO solutions should the solutions architect combine to meet these requirements in the most cost-effective manner? (Select TWO.)

Create an S3 Lifecycle rule to transition the objects to Amazon S3 Glacier Flexible Retrieval $15\text{ days}$ after creation.Answer
Create an S3 Lifecycle rule to expire the objects $120\text{ days}$ after creation.Answer
C
Create an S3 Lifecycle rule to transition the objects to Amazon S3 Standard-Infrequent Access (S3 Standard-IA) $15\text{ days}$ after creation, and then to Amazon S3 Glacier Flexible Retrieval $30\text{ days}$ after creation.
D
Create an S3 Lifecycle rule to transition the objects to Amazon S3 Glacier Deep Archive $15\text{ days}$ after creation.
E
Route the data transfer from the private EC2 instances to Amazon S3 through a NAT Gateway, and transition the objects to Amazon S3 Glacier Flexible Retrieval $15\text{ days}$ after creation.

Answer

To meet the requirements cost-effectively, the solutions architect should use S3 Lifecycle rules to transition the objects to Amazon S3 Glacier Flexible Retrieval

15\text{ days}

after creation, and expire the objects

120\text{ days}

after creation.

Transitioning files to Amazon S3 Glacier Flexible Retrieval after

15\text{ days}

is the most cost-effective tier because it meets the requirement of keeping files available immediately for the first

15\text{ days}

and allows standard retrievals within

3\text{ to }5\text{ hours}

, well within the

5\text{-hour}

audit limit. Expiring the objects after

120\text{ days}

ensures that they are deleted once the compliance retention period is reached, stopping all storage charges.

Step-by-Step Solution

Identify the storage requirements for the active data phase.

Data must be stored in a tier that provides immediate and frequent access for the first

15\text{ days}

Since the genomic sequencing files must be accessed frequently and immediately during the initial phase, they should remain in Amazon S3 Standard for the first

15\text{ days}

before transition.

Evaluate the optimal archive tier for the inactive phase based on cost and access requirements.

Amazon S3 Glacier Flexible Retrieval is chosen instead of S3 Standard-IA or S3 Glacier Deep Archive.

The files are rarely accessed after

15\text{ days}

and can tolerate a retrieval time of up to

5\text{ hours}

. S3 Glacier Flexible Retrieval (standard retrieval of

3\text{ to }5\text{ hours}

) meets this recovery window at a much lower cost than S3 Standard-IA, while S3 Glacier Deep Archive (up to

12\text{ hours}

) is too slow.

Define the expiration rule for regulatory compliance.

The files are set to expire

120\text{ days}

after creation.

The regulatory compliance rules require retaining files for at least

120\text{ days}

, after which they are no longer needed, so an expiration rule stops ongoing storage costs.

Key Concept

Selecting the most cost-effective S3 storage tier based on access patterns, retrieval times, minimum storage durations, and expiration requirements.

Estimated Time:2m 0s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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