AWS - EFS

Amazon Elastic File System (Amazon EFS) is a file storage service for Amazon Elastic Compute Cloud (Amazon EC2) instances. Amazon EFS is easy to use and provides a simple interface that allows you to create and configure file systems quickly and easily. With Amazon EFS, storage capacity is elastic, growing and shrinking automatically as you add and remove files, so your applications have the storage tey need, when they need it.

EFS Features

• Supports the Network File System version 4 (NFSv4) protocol
• You only pay for the storage you use (no pre-provisioning required)
• Can scale up to hte petabytes
• Can support thousands of concurrent NFS connections
• Data is stored across multiple AZ's within a region
• Read After Write Consistency

EFS enables multiple instances to connect to it, EBS can only be mounted to a single instances.