AWS Certified Solutions Architect Associate SAA-C03 Practice Question
A company needs a shared file system for their Amazon EC2 instances. The system must scale automatically as data grows and allow many instances to read and write to the same files at the same time. Which service should the company use?
Amazon EFS provides a fully managed, elastic NFS file system that automatically grows and shrinks as files are added or removed. It supports concurrent access from multiple Amazon EC2 instances, making it ideal for shared storage across a fleet.
Amazon EBS provides block storage that is normally attached to a single Amazon EC2 instance (while EBS Multi-Attach exists, it is limited to specific volume types and still requires a cluster-aware file system).
Amazon S3 is an object-storage service and does not present a POSIX-compliant file-system interface.
Amazon Storage Gateway is a hybrid service that exposes on-premises interfaces to cloud storage; it is not intended to provide a native, shared file system to EC2 instances in this scenario.
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