AWS Technical Essentials 2025 – 400 Free Practice Questions to Pass the Exam

Amazon EFS (Elastic File System) is a fully managed service that provides scalable file storage that can be accessed by multiple Amazon EC2 instances simultaneously. It is designed for use with applications that require a shared file system among different EC2 instances, making it ideal for use cases such as content management, web server data sharing, and development environments.

The service allows for concurrent connections from various instances, maintaining a high level of availability and durability. This is particularly useful when multiple instances need to access the same data concurrently, as EFS provides a unified file system interface.

In contrast, Amazon S3 is an object storage service that is suitable for data storage but does not provide a traditional file system interface or allow multiple instances to mount the same storage in the same way as EFS. Amazon EBS (Elastic Block Store) provides block-level storage that can be attached to single EC2 instances but cannot be shared across multiple instances simultaneously. Lastly, Amazon Glacier is primarily focused on archival storage and data retrieval but is not designed for real-time access or multi-instance connections.