Q76 — AWS SAA-C03 Ch.15

Question 76 of 100 | ← Chapter 15

Q1176. A company runs an application on Amazon EC2 instances across multiple Availability Zones in the same AWS Region. The EC2 instances share an Amazon Elastic File System (Amazon EFS) volume that is mounted on all the instances. The EFS volume stores a variety of files such as installation media,third-party files,interface files, and other one-time files.The company accesses some EFS files frequently and needs to retrieve the files quickly. The company accesses other files rarely.The EFS volume is multiple terabytes in size. The company needs to optimize storage costs for Amazon EFS.Which solution will meet these requirements with the LEAST effort?

Correct Answer: B. Apply a lifecycle policy to the EFS files to move the files to EFS Infrequent Access.

Explanation

To meet the company's requirements of optimizing storage costs for Amazon EFS with the least effort, the best solution is B. Apply a lifecycle policy to the EFS files to move the files to EFS Infrequent Access.Here's the analysis:Key Requirements:Frequent and Rare File Access: The company accesses some EFS files frequently and needs quick retrieval, while other files are accessed rarely.Large Storage Volume: The EFS volume is multiple terabytes in size. Cost Optimization: The company needs to optimize storage costs.Analysis of Options:Option A: Move the files to Amazon S3 and set up a lifecycle policy to move the files to S3 Glacier Flexible RetrievalThis option involves migrating files from EFS to S3, which requires significant effort in terms of data migration and application changes to ensure that the application can still access the files from S3. Additionally, S3 Glacier Flexible Retrieval is designed for archival storage with longer retrieval times, which may not be suitable for files that need to be retrieved quickly. Option B: Apply a lifecycle policy to the EFS files to move the files to EFS Infrequent Access This option allows the company to keep the files within EFS, avoiding the need for data migration and application changes.EFS Infrequent Access (EFS IA) is designed for files that are accessed less frequently but still need to be retrieved quickly when needed. It offers a lower storage cost compared to EFS Standard while maintaining good performance for occasional access.By applying a lifecycle policy, the company can automatically move rarely accessed files to EFS IA, optimizing storage costs with minimal effort.Option C: Move the files to Amazon Elastic Block Store (Amazon EBS) Cold HDD Volumes (sc1) This option involves migrating files from EFS to EBS, which is not suitable for shared file storage across multiple EC2 instances. EBS volumes are attached to a single EC2 instance and are not designed for shared access.Additionally, migrating data from EFS to EBS would require significant effort and may not be feasible for a large EFS volume.Option D: Move the files to Amazon S3 and set up a lifecycle policy to move the rarely-used files to S3 Glacier Deep ArchiveSimilar to Option A, this option involves migrating files from EFS to S3, which requires significant effort. S3 Glacier Deep Archive is designed for long-term archival storage with the lowest storage cost but the longest retrieval times. It is not suitable for files that need to be retrieved quickly.