EFS

Question 1

Elastic File System (EFS)

Answer 1

File storage service for EC2 instances

storage capacity is elastic, grows and shrinks automatically as files are added and removed

Applications have the storage needed, when needed

Question 2

How do you pay for EFS?

Answer 2

Pay for the storage you use
no pre-provisioning

not like EBS where you create a xGb volume

Question 3

What version of NFS does EFS use?

Answer 3

NFS v4

Question 4

How big does EFS scale?

Answer 4

to petabytes

Question 5

How does AWS store EFS data?

Answer 5

across multiple Availability Zones in a region

Question 6

is EFS block based?

Answer 6

Yes, EFS is block based
so you can share files with EC2 instances

not object based like S3

Question 7

What consistency model does EFS have?

Answer 7

read after write

Question 8

Process to create an EFS

Answer 8

Choose VPC

Create mount target (select which AZ you want mount target in. AWS recommends one mount target in each AZ so EC2 instances across your VPC can access the file system). Choose subnet and security group

Add tags

Review and create

Question 9

Use case for EFS

Answer 9

use as a file server

centralized repository for multiple EC2 instances

Question 10

Permissions that you can use in EFS

Answer 10

user level permissions

directory level permissions

Question 11

How to mount EFS volume to EC2 instance

Answer 11

Create a new directory on your EC2 instance, such as “efs”.
sudo mkdir efs

Mount your file system using the DNS name. Mounting considerations

sudo mount -t nfs4 -o nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2 fs-19d92660.efs.us-east-2.amazonaws.com:/ efs