Related: EC2 Storage Terminology, AWS S3 Simple Storage Service
Elastic File System (EFS). Is a network storage which can be connected to multiple EC2 Linux instances. Linux only. Uses mount targets.
AWS implementation for Network File System - Wikipedia V4 of it.
Can be accessed from on-premises AWS Site-to-Site VPN or AWS Direct Connect (DX).
amazon-efs-utils is used for in Linux mounting Using the amazon-efs-utils Tools - Amazon Elastic File System
Options
- Speed: GP (default for 99.9% use cases) and MAX I/O mode (for high parallel processes)
- Scalability: Bursting (like GP2 in EBS, more data more performance) and Enhanced (Provisioned – you specify your requirements, more rarely used/Elastic - scales automatically) Throughput Mode
- Storage Class: Standard (default) vs Infrequent Access (IA)
- Data Retention: Lifecycle policies
Mount targets are deployed on per AZ basis.
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