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Amazon Elastic File System
User Guide

Document History

The following table describes important changes to the Amazon Elastic File System User Guide.

  • API version: 2015-02-01

  • Latest documentation update: May 30, 2018

Change Description Date Changed
Additional AWS Region support added Amazon EFS is now available to all users in the Asia Pacific (Seoul) AWS Region. In this release
Added CloudWatch metric math support Metric math enables you to query multiple CloudWatch metrics and use math expressions to create new time series based on these metrics. For more information, see Using Metric Math with Amazon EFS. April 4, 2018
Added the amazon-efs-utils set of open-source tools, and added encryption in transit

The amazon-efs-utils tools are a set of open-source executable files that simplifies aspects of using Amazon EFS, like mounting. There's no additional cost to use amazon-efs-utils, and you can download these tools from GitHub. For more information, see Using the amazon-efs-utils Tools.

Also in this release, Amazon EFS now supports encryption in transit through Transport Layer Security (TLS) tunneling. For more information, see Encrypting Data and Metadata in EFS.

April 4, 2018
Updated file system limits per AWS Region Amazon EFS has increased the limit on the number of file systems for all accounts in all AWS Regions. For more information, see Resource Limits. March 15, 2018
Additional AWS Region support added Amazon EFS is now available to all users in the US West (N. California) AWS Region. March 14, 2018
Amazon EFS File Sync (EFS File Sync) Amazon EFS now supports copying files from your on-premises data center or from the cloud to Amazon EFS by using EFS File Sync. EFS File Sync copies file systems accessed using Network File System (NFS) version 3 or NFS version 4 to Amazon EFS file systems. To get started, see Amazon EFS File Sync. November 22, 2017
Data encryption at rest Amazon EFS now supports data encryption at rest. For more information, see Encrypting Data and Metadata in EFS. August 14, 2017
Additional region support added Amazon EFS is now available to all users in the EU (Frankfurt) region. July 20, 2017
File system names using Domain Name System (DNS) Amazon EFS now supports DNS names for file systems. A file system's DNS name automatically resolves to a mount target’s IP address in the Availability Zone for the connecting Amazon EC2 instance. For more information, see Mounting on Amazon EC2 with a DNS Name. December 20, 2016
Increased tag support for file systems Amazon EFS now supports 50 tags per file system. For more information on tags in Amazon EFS, see Managing File System Tags. August 29, 2016

General availability

Amazon EFS is now generally available to all users in the US East (N. Virginia), US West (Oregon), and EU (Ireland) regions.

June 28, 2016

File system limit increase

The number of Amazon EFS file systems that can be created per account per region increased from 5 to 10.

August 21, 2015

Updated Getting Started exercise

The Getting Started exercise has been updated to simplify the getting started process.

August 17, 2015

New guide

This is the first release of the Amazon Elastic File System User Guide.

May 26, 2015