Regions and Availability Zones - AWS Certification


Let’s get a quick overview of Regions and Availability Zones from an AWS certification perspective. We will look at important certification questions regarding Regions and Availability Zones.

You will learn

  • What is a Region?
  • What is an Availability Zone?
  • Why do we need Regions and Availability Zones?

AWS Certification - 25 PDF Cheat Sheets + Free Course

Each cheat sheet contains:

  • FAQs and Tutorials with 5-20 slides
  • Notes to quickly review and prepare for certification exam
  • Certification Exam Tips
  • Certification and Interview Scenario Questions
Download

Regions and Zones

Let’s first understand the need for Regions and Zones with an example:

Imagine that your application is deployed in a data center in London.

What would be the challenges?

  • Challenge 1 : Slow access for users from other parts of the world (high latency)
  • Challenge 2 : What if the data center crashes?
    • Your application goes down (low availability)

Multiple data centers

Let’s add in one more data center in London.

What would be the challenges now?

  • Challenge 1 : Slow access for users from other parts of the world
  • Challenge 2 (SOLVED) : What if one data center crashes?
    • Your application is still available from the other data center
  • Challenge 3 : What if entire region of London is unavailable?
    • Your application goes down

Multiple regions

Let’s add a new region : Mumbai.

What would be the challenges?

  • Challenge 1 (PARTLY SOLVED) : Slow access for users from other parts of the world
    • You can solve this by adding deployments for your applications in other regions
  • Challenge 2 (SOLVED) : What if one data center crashes?
    • Your application is still live from the other data centers
  • Challenge 3 (SOLVED) : What if entire region of London is unavailable?
    • Your application is served from Mumbai

Regions

Imagine setting up your own data centers in different regions around the world

  • Would that be easy?

AWS provides 20+ regions around the world (expanding every year). Advantages of Regions include:

  • High Availability
  • Low Latency
  • Adhere to government regulations

Choose the right region(s) based on:

  • Where are your users located?
  • Where is your data located?
  • Regulatory and security compliance needs

AWS Availability Zones

Availability Zones are Isolated locations in a Region. Each AWS Region has at least two Availability Zones. Availability Zones increase availability of applications in the same region.

AWS Regions and Availability Zones examples

New Regions and AZs are constantly added. Here is table showing examples of regions and AZs.

Region Code Region Availability Zones Availability Zones List
us-east-1 US East (N. Virginia) 6 us-east-1a us-east-1b
us-east-1c us-east-1d
us-east-1e us-east-1f
eu-west-2 Europe (London) 3 eu-west-2a eu-west-2b
eu-west-2c
ap-south-1 Asia Pacific(Mumbai) 3 ap-south-1a ap-south-1b
ap-south-1c

Search


Certification - Recommended Reading

Amazon RDS - Relational Database Service and Amazon Aurora

Multi-AZ vs Multi-Region vs Read replicas - Amazon RDS

Database Primer - Availability vs Durability vs RTO vs RPO vs Consistency

Migrating databases in AWS - Data Pipeline vs DMS vs SCT

Amazon RedShift vs RedShift Spectrum vs Amazon EMR - A comparison

AWS Data Lakes - Simplified Big Data Solutions

Amazon RedShift - Big Data in AWS

Amazon Cognito - User Pools, Identity Pools

Amazon S3 Storage Classes - Standard vs Standard-IA vs One Zone vs Intelligent-Tiering vs Glacier

Amazon S3 Glacier - vs Amazon S3

Free Videos - Get Started with AWS Certification

Complete Course - AWS Certified Solutions Architect Associate

Get our amazing course pursued by thousands of learners

  • 400+ Lectures
  • 28 hours on-demand video
  • 18 articles
  • 2 downloadable resources
  • Full lifetime access

Image


Search