Amazon Elastic File System (EFS)

Amazon Elastic File System (EFS) is a fully managed, scalable NFS file system for use with AWS Cloud services and on-premises resources.

EFS operates using the Linux Network File System (NFS) protocol

It automatically scales to petabytes as you add or remove files without disrupting applications.

EFS is designed to support a wide variety of workloads and can be accessed by multiple EC2 instances simultaneously.

Storage Classes

1. Standard Storage Classes
   1. EFS Standard
   2. EFS Standard-Infrequent Access (Standard-IA)
   • both offer multi-AZ resilience and the highest levels of durability and availability.
2. One Zone Storage Classes
   1. EFS One Zone
   2. EFS One Zone-Infrequent Access (EFS One Zone-IA)
   • provide additional savings by saving data in a single Availability Zone.
3. Archive Storage Classes
   1. EFS Archive
   • cost-optimized for data that is accessed only a few times a year or less.