EC2 Instance Storage

Question 1

What is EBS Volume?

Answer 1

Elastic Block Store

Question 2

What does EBS do?

Answer 2

A network drive you can attach to your instances while they run

Question 3

Why use EBS?

Answer 3

Allow your instances to persist data, even after their termination

Question 4

How many instances can an EBS be mounted to?

Answer 4

One instance at a time

Question 5

They are bound to a specific availability zone?

Answer 5

True

Question 6

Can be attached to more then one instance?

Answer 6

Only after detaching from one can it be connected to another. Can be done quickly.

Question 7

How can they be moved across zone?

Answer 7

Take a snapshot, restore snapshot to another AZ

Question 8

Why do you need to provision capacity?

Answer 8

You get billed for that provision capacity. Capacity can be increased over time

Question 9

You can attacked two EBS Volumes to one instance?

Answer 9

True

Question 10

EBS Volumes can be left unattached an attached on demand?

Answer 10

True

Question 11

By default, what happens a EBS when an ECS instance terminates?

Answer 11

The root EBS Volume is deleted
&
Any other attached EBS Volume is not deleted

Question 12

What is a “snapshot”?

Answer 12

Make a backup (snapshot) of your EBS volume at a point in time

Question 13

It necessary to detach volume to do a “snapshot”.

Answer 13

False. But it is recommended

Question 14

What are 3 snapshot features?

Answer 14

1. EBS Snapshot Archive
2. Recycle Bin for EBS Snapshots
3. Fast Snapshot Restored

Question 15

What does “EBS Snapshot Archive” do?

Answer 15

• Move a snapshot to an “archive tier” that is 75% cheaper
• Takes within 24 to 72 hours for restoring the archive

Question 16

What does “Recycle Bin for EBS Snapshots” do?

Answer 16

• Setup rules to retain deleted snapshots so you can recover them from an accidental deletion
• Specify retention form 1 day to 1 year

Question 17

What does “Takes within 24 to 72 hours for restoring the archive” do?

Answer 17

• Force full initialization of snapshot to have no latency on the first use ($$$)
• Particularly helpful if snapshot is big and need to initialize an EBS volume or needs to instance out of it very quickly
• This feature costs a lot of money

Question 18

What is AMI?

Answer 18

Amazon machine image

Question 19

What does AMI do?

Answer 19

Customization of an EC2 instance

Question 20

What is the purpose of AMI?

Answer 20

• You add your own software configuration, operating system, monitoring…
• Faster boot / configuration time all your software is prepackaged

Question 21

AMI are built (unique) for specific region?

Answer 21

True but can be copied across regions.

Question 22

3 different kinds of AMIs?

Answer 22

• • A Public AMI: AWS provided
  • Your own AMI: you make and maintain yourself
  • An AWS Marketplace AMI: an AMI someone else made ( and potentially sells)

Question 23

Where can you launch EC2 instances from?

Answer 23

AMIs

Question 24

AMI Process (from an EC2 instance)

Answer 24

• Start an EC2 instance and customize it
• Stop the instance (for data integrity)
• Build an AMI - this will also create EBS snapshots
• Launch instances from other AMIs

Question 25

EBS volumes are ............. with good but .......... performance.

Answer 25

network drives, "limited"

Question 26

If you need high-performance hardware disk, use..

Answer 26

EC2 Instance Store

Question 27

Features: - Better I/O performance - EC2 Instance Instance Store lose their storage if they’re stopped (ephemeral) - Good for buffer, cache, scratch data, temporary content - Risk of data loss if hardware fails - Backups and Replication are your responsibility

Answer 27

ECS Instance Store

Question 28

from an exam perspective anytime you see very high performance hardware attached volume for your EC2 Instances, think

Answer 28

local EC2 Instance Store.

Question 29

EBS volumes comes in 6 type:

Answer 29

- gp2 / gp3 (SSD): - io1 / io2 Block Express (SSD) - st1 (HDD) - sc1 (HDD)

Question 30

General purpose SSD volume that balances price and performance for a wide variety of workloads

Answer 30

gp2 / gp3 (SSD)

Question 31

Highest-performance SSD volume mission-critical low-latency or high-throughput workloads

Answer 31

io1 / io2 Block Express (SSD)

Question 32

Low cost HDD volume designed for frequently accessed throughput intensive workloads

Answer 32

st1 (HDD)

Question 33

Lowest cost HDD volume designed for less frequently accessed workloads

Answer 33

sc1 (HDD)

Question 34

What is EBS Multi-Attach?

Answer 34

Attach the same EBS volume to multiple EC2 instances in the same AZ

Question 35

What is Amazon EFS?

Answer 35

Elastic File System

Question 36

What is EFS for?

Answer 36

Managed NFS (network file system) that can be mounted on many EC2

Question 37

EFS works with EC2 instances in multi-AZ?

Answer 37

True