What is the main purpose of Amazon Elastic File System (EFS)?

Amazon Elastic File System (EFS) is designed specifically to offer scalable file storage solutions for applications that require a shared file system in the cloud. Its primary purpose is to provide a fully managed, elastic file storage service that can automatically scale up or down as needed, allowing users to store and access files across multiple Amazon EC2 instances and other AWS services.

EFS supports standard file system semantics, which means it can handle a wide variety of workloads, including big data and analytics, media processing workflows, and content repositories. The seamless integration with AWS services makes it ideal for applications that require high availability and low-latency access to shared files, supporting multiple concurrent connections.

In contrast, providing object storage for large files is more aligned with Amazon S3, which is optimized for serving and storing unstructured data with a flat namespace. Managing cloud databases falls under services such as Amazon RDS or DynamoDB, while facilitating content delivery networks is primarily the domain of Amazon CloudFront, which is designed for distributing content with low latency and high transfer speeds. Thus, B clearly outlines the core function of EFS within the AWS ecosystem.