EBS Flashcards
EBS is an acronym for
Elastic Block Storage
How many EC2 instances can a EBS instance be attached to?
1
How do you backup EBS?
By snapshots
Best EBS HD type for boot volumes?
SDD
Best HD for smaller blocks?
SSD
Best HD for workloads with a high throughout?
HD
Best EBS HD for big data processing?
HD
SSD variants available
General purpose SSD (GP2) Provisioned IOPS (Io1)
EBS HDD variants
Cold HDD (SC1) Throughout Optimised (ST1)
Cheapest hard drive available for EBS?
Cold HDD (SC1)
How to increase the size of EBS?
Increase the size, then increase the file system size manually via command line.
Create a snapshot, then make a new larger EBS from that snapshot
Is EBS Charged via usage or amout provisioned?
Amount provisioned
Do region and hard drive effect EBS price?
Yes
To automatically attatch specific EBS volumes when an EC2 instance is launched. You must specify this in
Block device mapping
You have an EBS backed instance volume that you are turning into an AMI.
When you launch the new AMI. Will the EBS attatched to it contain the data from the original EBS?
No
Ephemeral Storage is best for?
None persistent data
EBS instances, can only be attatched to EC2 instances, running in the same ……..
AZ
What are EBS magnetic volumes?
Previous generation HDDs
When you create a snapshot of an EBS volume. Should you copy it to a different region?
Yes! Because if the AZ goes down, not only does the production version, but so do snapshots in that region too.
How do your create an EBS snapshot in a different region?
You create the snapshot, then you copy it to the other region
Would provisioned IOPS hard drive provide a cost optimised solution for a web server?
No
Will snapshots degrade IOPs performance of your EBS instance while in progress?
No
You want to automate backups of EBS. Name two ways of doing this.
Lambda function
A cronjob implemented via cloudwatch
If you want to encrypt an EBS instance. You need to do it on…
Boot
