EBS Flashcards
What does EBS stand for?
Elastic Block Storage
What can EBS volumes be used for?
create a file system, run a database, run an operating system, store data, install applications
What is gp2 for?
boot volumes or development and test applications that are not latency sensitive
What is gp3 good for?
require high performance at low cost such as MySQL, Cassandra, virtual desktops
If somethings requires more than 16000 IOPs, what type of EBS should you think of?
IO1 or IO2
What is IOP?
the standard measure of I/O read and write operations per second.
What is I/O?
input/outut
What are the two kinds of SDD?
gp2/gp3 and io1/io2
What is sc1?
A cold hard disk drive
What is the cheapest EBS option?
sc1
What does throughput measure?
The number of megabits (Mb) per second
If you are looking at data warehousing, data analytics, etc, what should you use?
throughput optimized HDD (st1)
If you are looking at something transactional in nature, what should you use?
Provisioned IOPs SSD (io1/io2)
What is EBS?
a highly available and highly scalable storage volume you can attach to an EC2 instance
What does ETL stand for?
Extract, transform, load
What are the HDD volume options?
throughput optimized HDD (st1) and cold HDD (sc1)
What is a computer’s primary storage?
Memory
How many volumes does an EC2 instance require?
1
What is the root device volume?
The volume that the EC2 instance needs to operate
Where are snapshots stored?
S3
What is a snapshot?
A point-in-time copy of a volume
What does it mean that snapshots are incremental?
Only the data that has changed since your last snapshot are moved to S3.
What is recommended to get a good snapshot? Why is this required?
Stop the instance. Snapshot only captures data that has been written to your EBS volume, which may exclude any data that has been locally cached
If a snapshot is done on an encrypted EBS volume, is the snapshot automatically encrypted as well?
Yes
Where can you share snapshots without copying them?
Only within the same region
Why are EBS volumes and their corresponding EC2 instances in different availability zones?
They are not, they are in the same availability zone
What is required to resize a EBS volume on an initiated EC2 instance?
Extend file system in the OS
Can you change volume types without stopping the instance?
Yes
What industry standard algorithm does EBS encrypt your volumes with?
AES-256
What impact does encryption have on latency?
minimal impact
Are root volumes unable to be encrypted upon creation?
No, they can be encrypted upon creation
Can you encrypt a copied, unencrypted snapshot?
Yes
What does SDD stand for?
Solid disk drive
In general, what is an SDD?
SSD’s store data permanently inside an integrated circuit, typically using flash memory
What is AWS EFS?
A managed network file system (NFS) that can be mounted on many EC2 instance types
Can EFS work with multiple EC2 instances in different availability zones?
Yes, EFS can be shared storage
What are two common use cases for EFS?
Content management (because easy to share content between EC2 instances) and web servers
What are the two storage tiers for EFS?
EFS standard access and EFS infrequent access
What is AWS FSx for windows?
A fully managed native Microsoft Windows file system
What is AWS FSx for Lustre?
A fully managed file system that is optimized for compute intensive workloads
Can FSx for Lustre store directly onto S3?
Yes
What is an AMI?
An Amazon machine image provides the information required to launch an instance
What can you base your AMI on?
Region, operating system, architecture, launch permissions, and storage for the root device
What are instance stores also called?
Ephemeral storage
If an instance is deleted with instance store volume/s, what happens to the data?
It is lost
Can EBS volume backed instances or instance storage backed instances be stopped?
EBS volume backed instances
What is AWS Backup?
AWS Backup allows you to consolidate your backups across multiple AWS services such as EC2, EBS, EFS, Amazon FSx, and AWS Storage Gateway
What are the benefits of AWS backup?
Central management, automation, and improved compliance
What is a good storage option for something that requires concurrent access across thousands of instances and can handle high performance computing?
Amazon FSx Lustre
What must EC2 instances share to exchange an EBS volume?
AZ
Are AMI’s region specific?
Yes
Are EBS volumes encrypted by default?
No
