EC2 Instance Storage Flashcards
What is an EBS Volume?
A network drive attached to EC2 instances that persists data even after termination.
Can EBS volumes be mounted to multiple instances?
No, only one instance at a time.
Are EBS volumes AZ-specific?
Yes, they are bound to a specific Availability Zone.
What is a good analogy for an EBS volume?
A network USB stick.
What is included in the EBS free tier?
30 GB/month of General Purpose SSD or Magnetic storage.
How is an EBS volume connected?
Over the network, which can introduce latency.
Can EBS volumes be detached and reattached?
Yes, quickly between instances in the same AZ.
How do you move an EBS volume across AZs?
Create a snapshot, then restore it in the new AZ.
What does the ‘Delete on Termination’ attribute do?
Controls whether the EBS volume is deleted when the EC2 instance is terminated.
What is an EBS Snapshot?
A point-in-time backup of an EBS volume.
Do you need to detach a volume to take a snapshot?
No, but it is recommended.
Can you copy EBS snapshots across AZs and Regions?
Yes.
What is the EBS Snapshot Archive?
A low-cost storage tier for EBS snapshots, slower to restore.
What is the Recycle Bin for EBS Snapshots?
Allows retention of deleted snapshots for recovery.
What is Fast Snapshot Restore (FSR)?
Pre-initializes snapshots to avoid latency on first use.
What is an AMI?
Amazon Machine Image, a template to launch EC2 instances.
What is included in an AMI?
Custom software, OS, configs, and monitoring.
How do you create an AMI from an EC2 instance?
Stop the instance, create AMI, which also creates EBS snapshots.
What is EC2 Instance Store?
High-performance local storage that is ephemeral.
When is EC2 Instance Store data lost?
When the instance is stopped or hardware fails.
What are the 6 EBS volume types?
gp2, gp3, io1, io2, st1, sc1.
Which EBS types can be used as boot volumes?
gp2, gp3, io1, io2.
What is the baseline IOPS for gp3?
3,000 IOPS and 125 MiB/s throughput.
How does gp2 IOPS scale?
3 IOPS per GB, up to 16,000 IOPS.
