Compute Services

Question 1

EC2

Answer 1

Elastic Compute Cloud

- allows you to rent and manage virtual servers in the cloud

Question 2

elastic compute power

Answer 2

can grow and shrink based on the needs put on your application

Question 3

where do EC2 instances run?

Answer 3

on physical servers in a data center. (they are not serverless)

Question 4

4 ways to access instances

Answer 4

1. AWS Management Console
2. SSH (most common)
3. EC2 Instance Connect
4. AWS Systems Manager

Question 5

Instance

Answer 5

AWS’ version of a virtual machine

Question 6

how is computing power billed for EC2?

Answer 6

in compute hours

750 hours per month included on the free tier plan

Question 7

what are AMIs

Answer 7

Amazon Machine Images for launching your instance

- preconfigured linux, windows or OSX installations which can be installed at the click of a button

Question 8

EC2 On Demand Pricing

Answer 8

fixed price, billed down to the second

Question 9

when to use EC2 On Demand Pricing?

Answer 9

• no upfront payment, low cost
• apps with unpredictable workloads that can’t be interrupted
• apps under development
• workloads that won’t run longer than a year

Question 10

how do you reserve on demand capacity?

Answer 10

on demand capacity reservations

Question 11

EC2 Spot Instance Pricing

Answer 11

• takes advantage of unused EC2 capacity
• your request is only fulfilled if capacity is available
• 90% cheaper than On-Demand

Question 12

which EC2 pricing model lets you save 90%

Answer 12

spot instances

Question 13

when to use EC2 spot instance pricing?

Answer 13

• when you are not concerned about start/stop of your application
• workloads that can be interrupted
• your application is only feasible at very low compute prices

Question 14

EC2 Reserved Instances (RI)

Answer 14

• requires a 1 or 3 year contract
• can pay up front to get a discount off On-Demand pricing
• save up to 75% off on-demand pricing
• requires a capacity reservation
• provides convertible types at a 54% discount (can change OS, instance family or tenancy model)

Question 15

EC2 Dedicated Host

Answer 15

• your own dedicated physical server
• bring your own software licenses
• for regulatory or compliance needs
• save up to 70% off on-demand pricing (However, of all the Amazon EC2 options, Dedicated Hosts are the most expensive.)

your instance runs on your dedicated host

Question 16

EC2 Savings Plans

Answer 16

• 1 or 3 year commitment
• can save up to 72% off on-demand pricing
• does not require a capacity reservation

Question 17

when to use the EC2 Savings Plan?

Answer 17

• to lower your bill across multiple compute services

- flexibility to change compute services, configurations, or regions

Question 18

elastic load balancing

Answer 18

distributes incoming application traffic across multiple EC2 instances

Question 19

what are 4 types of load balancers

Answer 19

1. classic
2. application
3. gateway
4. network

Question 20

EC2 auto scaling

Answer 20

adds or replaces EC2 instances automatically across AZs based on need or changing demands

Question 21

horizontal scaling

Answer 21

“scaling out”

adding or removing instances based on need

Question 22

vertical scaling

Answer 22

“scaling up”

adding more CPU or RAM to an instance

Question 23

AWS Lambda

Answer 23

serverless compute service that lets you run code without managing servers or a coding environment.

functions have a 15 minute time out

Question 24

benefits of Lambda

Answer 24

• application code (functions) can be authored in many popular programming languages
• scales automatically
• serverless
• lambda can execute code in response to events
• use your favorite IDE

Question 25

serverless

Answer 25

you don't have to manage your servers, AWS does it for you behind the scenes

Question 26

lambda use case examples

Answer 26

1. real time file processing 2. send email notifications 3. back-end business logic

Question 27

lambda compute time pricing

Answer 27

pay for only the compute time used while your code is actively running

Question 28

lambda request count pricing

Answer 28

- a request is counted each time it starts execution | - always free - free usage tier includes 1 million requests each month

Question 29

Fargate

Answer 29

- container management, like Docker - serverless - scales automatically

Question 30

Lightsail

Answer 30

allows you to quickly launch all the resources you need for small projects easy to use simple screens for people with little cloud experience - Ex: Wordpress preconfigured apps

Question 31

what does Lightsail come with?

Answer 31

- virtual machine - SSD-based storage - data transfer - DNS management - static IP - low, predictable monthly fee as low as $3.50/mo

Question 32

Outposts

Answer 32

run cloud services in your internal data center

Question 33

why use Outposts?

Answer 33

- need your workloads to remain on-prem due to latency or data processing needs - need a hybrid experience

Question 34

AWS Batch

Answer 34

- process large workloads in smaller batches | - dynamically provisions the instances it needs based on volume

Question 35

Which of the EC2 pricing plans is the cheapest

Answer 35

Spot Instances

Question 36

Which of the EC2 pricing plans is the most expensive?

Answer 36

Dedicated Host