AWS - Elastic File Storage (EFS)

• EFS is a file storage service for EC2 instances.
• With EFS storage capacity is elasting, growing and shrinking as per usage.
• EFS supports Network File System version 4 (NFS4) protocol.
• You are only charged for the storage you use. So, no pre-provisioning required.
• Can scale up to petabytes.
• Can support thousands of concurrent NFS connections.
• Data is stored across multiple AZs within a region.
• Read after write consistency.
• EC2 instances and EFS must be in same security group.
• Can apply user and directory level access permissions.
• Use case: Centralised file server.