AWS Certified Solutions Architect Associate SAA-C03 Practice Question
Your client needs a managed storage solution that can be mounted by multiple compute instances at the same time using the NFS protocol. Which AWS service should you recommend?
Amazon Elastic File System (EFS) is a fully managed, elastic, POSIX-compliant file system that supports NFSv4. One EFS file system can be mounted concurrently on thousands of Amazon EC2 instances and other AWS compute services, providing a shared file system without any server management.
Amazon S3 is object storage accessed through REST/HTTPS APIs and does not present a file system over NFS, so it does not meet the requirement for shared file-level access.
Amazon EBS is block storage. Although the Multi-Attach feature allows certain io1/io2 volumes to be attached to multiple instances, it still exposes raw block devices and requires a cluster-aware file system; it is not a managed NFS service. Therefore, Amazon EFS is the best match for the stated needs.
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Can you explain why Amazon EBS is not suitable for this scenario?