EFS

Question 1

What does EFS stand for?

Answer 1

Elastic File System

Question 2

What is the key difference between EFS and EBS?

Answer 2

• You can only mount an EBS device to one EC2 instance
• But multiple EC2 instances can share an EFS volume

Question 3

How does storage capacity work in Amazon EFS?

Answer 3

With EFS, storage capacity is elastic, growing and shrinking automatically as you add and remove files, so your applications have the storage they need, when they need it.

Question 4

Does EFS support NFSv4 protocol?

Answer 4

Yes

Question 5

What is the pricing model for EFS?

Answer 5

You only pay for the storage you use (no pre-provisioning required)

Question 6

How high can EFS scale its storage?

Answer 6

Up to the Petabytes

Question 7

Can EFS support multiple concurrent NFS connections?

Answer 7

Yes, in fact up to thousands of them

Question 8

How does EFS ensure high availability and redundancy of data?

Answer 8

Data is stored across multiple AZs within a region

Question 9

What is the data consistency model for EFS?

Answer 9

EFS has Read after Write consistency