High Availability and Scaling

Question 1

Scaling by adding more

Answer 1

Vertical Scaling

Question 2

Scaling by creating more

Answer 2

Horizontal Scaling

Question 3

Advantage of horizontal scaling

Answer 3

More Availability

Question 4

Specifies all the needed settings that go into building out an EC2 instances

Answer 4

Launch Template

Question 5

Collection of settings you can configure so you don’t have to walk through the EC2 wizard over and over

Answer 5

Launch Template

Question 6

Capable of leveraging all EC2 auto-scaling features

Answer 6

Launch templates

Question 7

Does Launch Templates support versioning?

Answer 7

Yes

Question 8

A collection of EC2 instances that are treated as a collective group for purposes of scaling and management

Answer 8

Auto Scaling Groups

Question 9

Lowest number of Ec2 instances you’ll ever have. Number of instances will not dip below this number

Answer 9

Minimum

Question 10

Highest number of EC2 instances you’ll ever provision. Number of instances will not get above this.

Answer 10

Maximum

Question 11

How many instances are launched when creating an auto-scaling group

Answer 11

Desired

Question 12

Perform custom actions on instances when corresponding lifecycle events occur

Answer 12

Lifecycle Hook

Question 13

Used for storing application logs on shutdown

Answer 13

Scaling in hooks

Question 14

Used for installing/configuring software before instance goes online

Answer 14

Scaling out hooks

Question 15

Vital to creating a highly available application due to spreading resources out over multiple availability zones

Answer 15

Auto Scaling Groups

Question 16

Scaling adjustments to vary the scaling depending on the size of the alarm breach

Answer 16

Step Scaling

Question 17

Scaling which relies on metrics for scaling needs

Answer 17

Simple Scaling

Question 18

Scaling that uses a scaling metric and value that your ASG should maintain at all times

Answer 18

Target Tracking

Question 19

Stops instances from being placed behind the load balancer, failing the health check, and being terminated prematurely

Answer 19

Instance Warm-up

Question 20

Pauses auto scaling for a set amount of time

Answer 20

Instance Cooldown

Question 21

Reactive scaling, Once the load is there you measure it and determine if you need to create more instances

Answer 21

Reactive Scaling

Question 22

Scaling predictable workloads, which creates a scaling event to get resources ready before they are actually needed

Answer 22

Scheduled scaling

Question 23

Scaling using AWS machine learning algorithms to determine when to scale

Answer 23

Predictive scaling

Question 24

Resizing the database from one size to another can create greater performance

Answer 24

Vertical Scaling

Question 25

Storage can be resized but it’s only able to go up not down

Answer 25

Scaling Storage

Question 26

Creating read-only copies of our data can help spread out the workload

Answer 26

Read Replicas

Question 27

Offload scaling to AWS, excels with unpredictable workloads

Answer 27

Aurora Serverless

Question 28

Storage only scales up - it won’t scale back down.

Answer 28

RDS

Question 29

Deploy highly available Reader instance which can be used for read operations

Answer 29

Multi-AZ Cluster DB Deployments

Question 30

Cannot be used for reads or writes

Answer 30

Standby Instances

Question 31

Used when possible if the situation calls for a relational database

Answer 31

Aurora

Question 32

AWS does all the scaling when using non-relational databases

Answer 32

DynamoDB

Question 33

DynamoDB scaling is used for generally predictable workload and is the most cost-effective model

Answer 33

Provisioned

Question 34

DynamoDB scaling used for sporadic workloads, less cost-effective pay per read/write

Answer 34

On-Demand

Question 35

DynamoDB unit of measurement for reads per second for an item up to 4KB in size

Answer 35

Read Capacity Unit (RCU)

Question 36

DynamoDB unit of measurement for writes per second for an item up to 1KB in size

Answer 36

Write Capacity Unit (WCU)