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AWS > EBS > Flashcards

EBS Flashcards

1
Q

What does EBS stand for?

A

Elastic Block Storage

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2
Q

What can EBS volumes be used for?

A

create a file system, run a database, run an operating system, store data, install applications

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3
Q

What is gp2 for?

A

boot volumes or development and test applications that are not latency sensitive

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4
Q

What is gp3 good for?

A

require high performance at low cost such as MySQL, Cassandra, virtual desktops

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5
Q

If somethings requires more than 16000 IOPs, what type of EBS should you think of?

A

IO1 or IO2

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6
Q

What is IOP?

A

the standard measure of I/O read and write operations per second.

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7
Q

What is I/O?

A

input/outut

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8
Q

What are the two kinds of SDD?

A

gp2/gp3 and io1/io2

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9
Q

What is sc1?

A

A cold hard disk drive

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10
Q

What is the cheapest EBS option?

A

sc1

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11
Q

What does throughput measure?

A

The number of megabits (Mb) per second

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12
Q

If you are looking at data warehousing, data analytics, etc, what should you use?

A

throughput optimized HDD (st1)

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13
Q

If you are looking at something transactional in nature, what should you use?

A

Provisioned IOPs SSD (io1/io2)

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14
Q

What is EBS?

A

a highly available and highly scalable storage volume you can attach to an EC2 instance

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15
Q

What does ETL stand for?

A

Extract, transform, load

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16
Q

What are the HDD volume options?

A

throughput optimized HDD (st1) and cold HDD (sc1)

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17
Q

What is a computer’s primary storage?

A

Memory

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18
Q

How many volumes does an EC2 instance require?

A

1

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19
Q

What is the root device volume?

A

The volume that the EC2 instance needs to operate

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20
Q

Where are snapshots stored?

A

S3

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21
Q

What is a snapshot?

A

A point-in-time copy of a volume

22
Q

What does it mean that snapshots are incremental?

A

Only the data that has changed since your last snapshot are moved to S3.

23
Q

What is recommended to get a good snapshot? Why is this required?

A

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

24
Q

If a snapshot is done on an encrypted EBS volume, is the snapshot automatically encrypted as well?

A

Yes

25
Q

Where can you share snapshots without copying them?

A

Only within the same region

26
Q

Why are EBS volumes and their corresponding EC2 instances in different availability zones?

A

They are not, they are in the same availability zone

27
Q

What is required to resize a EBS volume on an initiated EC2 instance?

A

Extend file system in the OS

28
Q

Can you change volume types without stopping the instance?

A

Yes

29
Q

What industry standard algorithm does EBS encrypt your volumes with?

A

AES-256

30
Q

What impact does encryption have on latency?

A

minimal impact

31
Q

Are root volumes unable to be encrypted upon creation?

A

No, they can be encrypted upon creation

32
Q

Can you encrypt a copied, unencrypted snapshot?

A

Yes

33
Q

What does SDD stand for?

A

Solid disk drive

34
Q

In general, what is an SDD?

A

SSD’s store data permanently inside an integrated circuit, typically using flash memory

35
Q

What is AWS EFS?

A

A managed network file system (NFS) that can be mounted on many EC2 instance types

36
Q

Can EFS work with multiple EC2 instances in different availability zones?

A

Yes, EFS can be shared storage

37
Q

What are two common use cases for EFS?

A

Content management (because easy to share content between EC2 instances) and web servers

38
Q

What are the two storage tiers for EFS?

A

EFS standard access and EFS infrequent access

39
Q

What is AWS FSx for windows?

A

A fully managed native Microsoft Windows file system

40
Q

What is AWS FSx for Lustre?

A

A fully managed file system that is optimized for compute intensive workloads

41
Q

Can FSx for Lustre store directly onto S3?

A

Yes

42
Q

What is an AMI?

A

An Amazon machine image provides the information required to launch an instance

43
Q

What can you base your AMI on?

A

Region, operating system, architecture, launch permissions, and storage for the root device

44
Q

What are instance stores also called?

A

Ephemeral storage

45
Q

If an instance is deleted with instance store volume/s, what happens to the data?

A

It is lost

46
Q

Can EBS volume backed instances or instance storage backed instances be stopped?

A

EBS volume backed instances

47
Q

What is AWS Backup?

A

AWS Backup allows you to consolidate your backups across multiple AWS services such as EC2, EBS, EFS, Amazon FSx, and AWS Storage Gateway

48
Q

What are the benefits of AWS backup?

A

Central management, automation, and improved compliance

49
Q

What is a good storage option for something that requires concurrent access across thousands of instances and can handle high performance computing?

A

Amazon FSx Lustre

50
Q

What must EC2 instances share to exchange an EBS volume?

A

AZ

51
Q

Are AMI’s region specific?

A

Yes

52
Q

Are EBS volumes encrypted by default?

A

No

AWS (18 decks)

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