Using Amazon EFS file systems

Amazon Elastic File System presents a standard file-system interface that supports full file-system access semantics. Using Network File System (NFS) version 4.1 (NFSv4.1), you can mount your Amazon EFS file system on any Amazon Elastic Compute Cloud (Amazon EC2) Linux-based instance. After your system is mounted, you can work with the files and directories just as you do with a local file system. For more information on mounting, see Mounting EFS file systems.

After you create a file system and mount it on your EC2 instance, to use your file system effectively you need to know about managing NFS-level permissions for users, groups, and related resources. When you first create your file system, there is only one root directory at /. By default, only the root user (UID 0) has read-write-execute permissions. For other users to modify the file system, the root user must explicitly grant them access. You use EFS access points to provision directories that are writable from a specific application. For more information, see Working with users, groups, and permissions at the Network File System (NFS) level and Working with Amazon EFS access points.