EFS - Elastic File System
Managed NFS (network file system) that can be mounted on many EC2
Managed NFS (network file system) that can be mounted on many EC2.
EFS works with EC2 instances in multi-AZ.
Highly available, scalable, expensive (3x gp2), pay per use.
Use cases: content management, web serving, data sharing, Wordpress.
Uses NFSv4.1 protocol.
Uses security group to control access to EFS.
Compatible with Linux based AMI (not Windows)
Encryption at rest using KMS.
POSIX file system (~Linux) that has a standard file API.
File system scales automatically, pay-per-use, no capacity planning!
EFS – Performance & Storage Classes
EFS Scale
1000s of concurrent NFS clients, 10 GB+ /s throughput
Grow to Petabyte-scale network file system, automatically.
Performance Mode (set at EFS creation time)
General Purpose (default) – latency-sensitive use cases (web server, CMS, etc.)
Max I/O – higher latency, throughput, highly parallel (big data, media processing)
Throughput Mode
Bursting – 1 TB = 50MiB/s + burst of up to 100MiB/s
Provisioned – set your throughput regardless of storage size, ex: 1 GiB/s for 1 TB storage.
Elastic – automatically scales throughput up or down based on your workloads.
Up to 3GiB/s for reads and 1GiB/s for writes.
Used for unpredictable workloads.
EFS – Storage Classes
Storage Tiers (lifecycle management feature – move file after N days)
Standard: for frequently accessed files
Infrequent access (EFS-IA): cost to retrieve files, lower price to store. Enable EFS -IA with a Lifecycle Policy
Availability and durability
Standard: Multi-AZ, great for prod
One Zone: One AZ, great for dev, backup enabled by default, compatible with IA (EFS One Zone -IA).
Over 90% in cost savings.
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