Amazon EFS with EC2

Amazon Elastic File System (Amazon EFS) is a simple, scalable file storage for use with Amazon EC2 instances in the AWS Cloud.  With Amazon EFS, storage capacity is elastic, growing and shrinking automatically as you add and remove files.


Important Notes of EFS (Exam Tips)

  1. Amazon EFS is designed for high availability and durability, and provides performance for a broad spectrum of use cases, including web and content serving, enterprise applications, media processing workflows, container storage and Big Data and analytics applications.

  2. When mounted on EC2 instances, an EFS file system provides a standard file system interface and file system access semantics.

  3. Multiple EC2 instances can access an EFS file system at the same time.

  4. You can mount your EFS file systems on your on-premises datacenter servers when connected to your Amazon VPC with AWS Direct Connect. This may be needed to migrate data sets to EFS, enable cloud bursting scenarios, or backup your on-premises data to EFS.

  5. EC2 instances connect to an EFS through a network interface called a mount target. Each mount target has an IP address, which can be specified or AWS will automatically create. AWS recommends creating a mount target in each of your VPC’s AZs so that EC2 instances across your VPC can access the file system. Mount targets are created during EFS creation.  

  6. EFS Supports Network File System v4 (NFSv4) Protocol.

  7. No pre-provisioning required; pay only for the storage you use.

  8. Can scale upto petabytes and can support thousands of concurrent NFS connections.

  9. Data is stored across multiple AZs within a region.

  10. EFS is still block based storage, but gets read after write consistency similar to S3.



Explore on EFS Pricing.

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About is my blog to share notes and learning materials on Cloud and Data Analytics. My current focus is on Amazon Web Services.

I like to write. I try to document what I learn and share with others. I believe that knowledge is useless unless you share it; the more you share, the more you learn.

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