Amazon EFS - Elastic File System
What is Amazon EFS?
Amazon EFS (Elastic File System) is a fully managed, scalable file storage service using the NFS protocol. It automatically scales to petabytes and allows multiple EC2 instances to access the same file system simultaneously.
Amazon EFS Video
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Amazon EFS Benefits
- Multi-AZ redundancy: Replicates data across Availability Zones for high availability
- Shared access: Thousands of concurrent NFS connections from multiple EC2 instances
- Elastic storage: Grows and shrinks automatically - pay only for what you use
Amazon EFS Features
Storage Classes
- Standard: Multi-AZ resilience with highest durability and availability
- One Zone: Single AZ storage at reduced cost
- Archive: Lowest cost for rarely accessed data
Lifecycle Policies
Automatically move data between storage classes based on access patterns:
- To Infrequent Access: Files not accessed for 30 days
- To Archive: Files not accessed for 90 days
- Back to Standard: Optionally restore when accessed
