EFS

Question 1

EFS

Answer 1

Network Based file System that can be mounted on Multiple Linux instances at once.

• EFS runs inside the VPC
• EFS is based on NFSv4

Question 2

EFS Integration

Answer 2

Private service, via mount targets inside a VPC
* Can be accessed by Hybrid services, eg, from on-premises - VPN or DX

Question 3

EFS Mount Target

Answer 3

• A Network interface for EFS.
• Mount Targets occupy iP Addresses from the Subnet’s CIDR.
• EFS is connected to VPC devices via a Mount target.
• It works like Nat Gateway for EFS.
• A good practice is to deploy mount Targets in every Subnet for HA.
• On-Prem devices also connect to EFS through VPN/DX-MountTarget-EFS

Question 4

EFS Performance mode

Answer 4

1. General-Purpose - Default.
   Good for Home directory, Latency sensitive applicatons, web servers, content management.
2. Max I/O - Scales to extremely High Aggregate throughput and operations per second but has a Trade-off of increased latency. good for Highly Parallel applications. Big data Analytics, Scientific analysis, Media workload

Question 5

Storage Classes

Answer 5

• Standard
• Infrequent Access - Default

Question 6

Throughput Mode

Answer 6

• Bursting - The more Data, the more performance. Throughput scales with the amount of data stored.
• Provisioned - Specified throughput separate from data stored.