EC2 Instance Storage Section

Question 1

EBS Volume

Answer 1

• a network drive you can attach to your instances while they run
• It allows your instances to persist data, even after their termination
• They can only be mounted to one instance at a time (at the CCP level)
• They are bound to a specific availability zone (to move it you need to snapshot)
• Free tier: 30 GB of free EBS storage of type General Purpose (SSD) or
Magnetic per month
• Have a provisioned capacity billing (size in GBs, and IOPS)

Question 2

EBS - Delete on termination attribute

Answer 2

Controls the EBS behaviour when an EC2 instance terminates
• By default, the root EBS volume is deleted (attribute enabled)
• By default, any other attached EBS volume is not deleted (attribute disabled)

Question 3

EBS Snapshot

Answer 3

• Make a backup (snapshot) of your EBS volume at a point in time
• Not necessary to detach volume to do snapshot, but recommended
• Can copy snapshots across AZ or Region

Question 4

AMI

Answer 4

• AMI = Amazon Machine Image
• customization of an EC2 instance (add your own software, configuration, operating system, monitoring…)
• Faster boot / configuration time because all your software is pre-packaged
• AMI are built for a specific region (and can be copied across regions)
• own/public/from marketplace

Question 5

EC2 Image Builder

Answer 5

• Used to automate the creation of Virtual Machines or container images
• => Automate the creation, maintain, validate and test EC2 AMIs
• Can be run on a schedule (weekly, whenever packages are updated, etc…)
• Free service (only pay for the underlying resources)

Question 6

EC2 Instance Store

Answer 6

• hardware disk with Better I/O performance
• EC2 Instance Store lose their storage if they’re stopped (ephemeral)
• Good for buffer / cache / scratch data / temporary content
• Backups and Replication are your responsibility

Question 7

EFS

Answer 7

• Managed NFS (network file system) that can be mounted on 100s of EC2
• EFS works with Linux EC2 instances in multi-AZ
• Highly available, scalable, expensive (3x gp2), pay per use, no capacity planning

Question 8

EFS Infrequent Access (EFS-IA)

Answer 8

• Storage class that is cost-optimized for files not accessed every day
• Up to 92% lower cost compared to EFS Standard
• EFS will automatically move your files to EFS-IA based on the last time they were accessed
• Enable EFS-IA with a Lifecycle Policy
• Example: move files that are not accessed for 60 days to EFS-IA
• Transparent to the applications accessing EFS

Question 9

Amazon FSx

Answer 9

• Launch 3rd party high-performance file systems on AWS

* Fully managed service

Question 10

Amazon FSx for Windows File Server

Answer 10

• A fully managed, highly reliable, and scalable Windows native shared file system
• Built on Windows File Server
• Supports SMB protocol & Windows NTFS
• Integrated with Microsoft Active Directory
• Can be accessed from AWS or your on-premise infrastructure