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What is AWS EFS?

Amazon Elastic File System (Amazon EFS) is a straightforward, serverless, set-and-forget file system. There is no setup or minimum fee. You only pay for the storage you use, for reading and writing access to data kept in Infrequent Access storage classes, and any allocated throughput.

In this blog, we’ll go through the fundamentals of AWS EFS, provide some performance suggestions, and compare it to other AWS storage solutions.

Table of Contents:

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AWS EFS Overview

The AWS Elastic File System (EFS) is one of Amazon’s three primary storage solutions. It is a scalable, cloud-based file system supporting Linux-based applications and workloads that can work in tandem with AWS cloud services and on-premise resources.

Depending on your needs, EFS offers two storage classes: Infrequent Access and Standard Access. Standard access storage is meant for regularly accessed data, whereas Infrequent Access storage is intended for long-term but less frequently used information at a cheaper cost.

The file systems can scale automatically from gigabytes to petabytes of data without the requirement for storage provisioning. An AWS EFS file system can be accessed by tens, hundreds, or even thousands of compute instances at the same time, and Amazon EFS ensures consistent performance for each compute instance.

It is built to be both long-lasting and readily available. There is no minimum price or setup cost with Amazon EFS, and you just pay for what you use.

Amazon EFS features

Amazon EFS comes packed with some great features such as

Fully Managed

AWS EFS is a fully managed service that provides NFS shared file system storage to Linux workloads. It is easy to construct and configure file systems using Amazon EFS. You are not required to manage file servers or storage, update hardware, configure software, or perform backups. Create a fully managed file system in seconds with the AWS Management Console, the AWS Command Line Interface (CLI), or an AWS SDK.

Highly available and durable

Amazon EFS is supposed to have a durability of 99.999999999 percent and availability of up to 99.99 percent. For file systems that use Standard storage classes, AWS EFS stores every file system object (that is, a directory, file, and link) redundantly across multiple Availability Zones (AZs). When you choose Amazon EFS One Zone storage classes, your data is stored redundantly within a single AZ.

It is designed to withstand concurrent device failures by detecting and correcting any lost redundancy as rapidly as possible. Furthermore, you can access a file system that uses Standard storage classes from any AZ in the AWS Region where it is situated.

In other words, you can design your application to failover from one AZ to another in the Region for maximum application availability. For all Amazon EFS storage classes, mount targets are meant to be highly accessible within an AZ.

Elastic & Scalable

EFS scales your file system’s storage automatically depending upon the number of documents in your file system. It expands when additional files are added and contracts as ones are discarded. Customers are not required to pre-provision any storage.

EFS can accommodate a petabyte-scale file system, and the file system’s throughput scales with its capacity.

Performance Modes

EFS offers two performance modes:

Throughput Modes

AWS EFS provides two throughput modes:


The following security measures offered by AWS EFS:

Career Transition

AWS EFS Use cases

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Working of AWS EFS

Amazon Elastic File System dynamically expands and contracts as you add and remove files, with no management or provisioning required.

Working of AWS EFS

AWS EFS vs S3 vs EBS

Elastic File Storage (EFS), Elastic Block Storage (EBS), and Simple Storage Service (S3) are 3 different types of storage offered by AWS, and they all have their advantages.

Let’s compare them to get a better idea of what kind of storage suffices your needs.

Performance 3GB/s baseline performanceUp to 10GB/s throughputUp To 500k IOPS Supports 3500 PUT/LIST/DELETE requests per secondScaleable to 5500 GET requests per second HDD Volumes 250-500 IOPS/volume depending on volume typeSSD volumes 16-64K IOPS/volume
Availability and Accessibility No publicly available SLAUp to 1000 concurrent instancesAccessible from any AZ or region Usually 99.9% availableIf lower, returns 10-100% of the costAccessible via the Internet using APIs 99.9% available Accessible via single EC2 instance
Access Control IAM user-based authenticationSecurity groups Acess is based on IAMUses bucket policies and user policiesPublic access via Block Public Access Security groupsUser-based authentication (IAM)
Storage and File Size Limits 16TB per volume52TB maximum for individual files No limit on the quantity of objectsIndividual objects up to 5TB Max storage size of 16TBNo file size limit on disk
Cost Standard storage: $0.30-$0.39 per GB-month depending on regionInfrequent storage: $0.025-$0.03 per GB-monthProvisioned throughput: $6 per MB/s-month Free tier: 5GBFirst 50 TB/month: $0.023 per GBNext 450 TB/month: $0.022 per GBOver 500 Tb/month: $0.021 per GB Free tier: 30GBGeneral Purpose: $0.045 per GB/monthProvisioned SSD: $0.125 per GB/month, $0.065 per IOPS/month

The advantage of using AWS EFS over AWS EBS is that EFS, unlike EBS, may be mounted by many EC2 instances, which means that many virtual machines can store data within an EFS instance.

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Amazon EFS pricing

You only pay for the resources you use with Amazon EFS. There is no minimum price and no setup fees. It has two storage classes: standard storage and infrequent access storage, which is cost-effective for data that aren’t accessed every day.


Amazon EFS is one of Amazon’s primary storage offerings. Once you grasp the fundamental concepts of AWS EFS, you may optimize your application’s speed while also lowering its cost.

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