• Managed NFS - Network file system , that can be mounted on many EC2
• Can be shared between multiple EC2 instances, even from EC2 instances from different availability zones
• Highly available, scalable and expensive (3x gp2)
• Costlier than EBS, S3
• Pay per use, no need for capacity planning for each GB you use in EFS
• USE cases : Content management, web serving, data serving, Wordpress
• Uses NFS v4.1 protocol
• Uses Security Group to control access to EFS
• Compatible with Linux based AMI (not windows, only works with POSIX file system)
• Encryption at rest using KMS

EFS Scale

• 1000s of concurrent NFS clients, 10 GB per sec throughput
• Grow to petabyte scale file system automatically

EFS Storage Classes

• move files automatically between storage tiers between tiers after N days

Storage Tiers

Standard tier