EC2 Tenancy - Shared vs Dedicated Tenancy - AWS Certification


Let’s get a quick overview of EC2 Tenancy from an AWS certification perspective. We will look at important certification questions regarding Shared vs Dedicated Tenancy.

You will learn

  • What is tenancy of EC2 instances?
  • What are the different types of EC2 tenancies?
  • What is the comparison between Shared and Dedicated Tenancy?
  • When do you use Shared vs Dedicated Tenancy?

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EC2 Tenancy - Shared vs Dedicated

When ever we create EC2 instances, we are using Shared Tenancy by default. In Shared tenancy, single host machine can have instances from multiple customers.

There are two Dedicated EC2 options:

  • EC2 Dedicated Instances
  • EC2 Dedicated Hosts

EC2 Dedicated Instances are Virtualized instances on hardware dedicated to one customer:

  • You do NOT have visibility into the hardware of underlying host

EC2 Dedicated Hosts are Physical servers dedicated to one customer:

  • You have visibility into the hardware of underlying host (sockets and physical cores)
  • (Use cases) Regulatory needs or server-bound software licenses like Windows Server, SQL Server

EC2 Dedicated Instances vs Hosts

Let’s look at quick comparison:

Feature Dedicated Instance Dedicated Host
Billing Per instance Per host
Targeted Instance Placement  
Access to Underlying Host Hardware  

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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

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