Demystifying AWS EC2: A Comprehensive Introduction and In-Depth Look at EC2 Instance Types

What is AMZON EC2 (Elastic Compute Cloud):                Amazon Elastic Compute Cloud (Amazon EC2) is a web service provided by Amazon Web ...

What is AMZON EC2 (Elastic Compute Cloud):

            Amazon Elastic Compute Cloud (Amazon EC2) is a web service provided by Amazon Web Services (AWS) that allows users to rent virtual servers (known as instances) on the cloud. 

Amazon EC2, you can easily launch, manage, and terminate virtual machine instances as needed, providing you with scalable computing capacity in the cloud.

 Amazon EC2 enables you to create and run virtual machine instances on AWS infrastructure. You can choose from a variety of instance types, which differ in terms of CPU, memory, storage, and network capabilities. This allows you to select the most suitable instance type for your specific application requirements.


  • Scalability
  • Security
  • Global Reach
  • Pay-as-you-go Pricing Model
  • Integration with other AWS Services
  • Pre-built AMIs(Amazon Machine Image)

Overall, Amazon EC2 is a foundational service that forms the backbone of many cloud-based applications and services, providing on-demand computing resources to support a wide range of workloads, from small applications to large-scale enterprise systems.

EC2 Instance Creation Types:

1. On-demand instance:

2. Reserved instance

3. Spot instance

On-demand instance:
    On-Demand instances are the most straightforward and flexible option. They allow you to pay for computing capacity on an hourly or per-second basis, with no upfront commitment. You can launch and terminate instances at any time, and you only pay for the hours or seconds the instances are running. On-Demand instances are ideal for short-term, spiky, or unpredictable workloads.

Reserved instance:    
    Reserved Instances provide a significant discount compared to On-Demand instances in exchange for a commitment to use the instance for a specific term (one or three years). RIs offer different payment options: All Upfront, Partial Upfront, or No Upfront, each with varying discount levels. They are suitable for steady-state workloads with predictable usage, as they provide a cost-effective solution over a more extended period.

Spot instance:
Spot Instances enable you to bid on unused EC2 capacity, allowing you to take advantage of spare compute capacity in the AWS cloud at a significantly lower cost than On-Demand instances. However, keep in mind that spot instances can be interrupted by AWS if the capacity is needed by On-Demand or Reserved Instances with higher priority. Spot Instances are suitable for fault-tolerant, batch processing, and cost-sensitive workloads.

Savings Plans: 
Savings Plans are a flexible pricing model that provides cost savings on compute usage in the AWS Cloud, not limited to EC2 instances. With Savings Plans, you commit to a specific dollar amount per hour or per-second usage over a one- or three-year term. You can apply the savings to EC2 usage across instance families, sizes, operating systems, and regions, providing more flexibility compared to traditional RIs.

Dedicated Instances:    
        Dedicated Instances are EC2 instances that run on hardware dedicated to a single AWS account. They are physically isolated from instances belonging to other AWS accounts. This provides additional isolation for compliance or regulatory requirements.

Dedicated Hosts:     
        Dedicated Hosts are physical servers dedicated entirely to your AWS account. With Dedicated Hosts, you have more control over instance placement, allowing you to bring your existing server-bound software licenses to the cloud while meeting compliance and regulatory requirements.

EC2-Instance Types:
        Amazon EC2 offers a wide range of instance types, each designed to cater to specific workloads and performance requirements. These instance types differ in terms of CPU, memory, storage, and networking capabilities. Here is an overview of some common EC2 instance types

1. General Purpose

2. Compute Optimized

3. Memory Optimized

4. Accelerated Computing

5. Storage Optimized

6. HPC Optimized

1. General Purpose    
        General purpose instances provide a balance of compute, memory and networking resources, and can be used for a variety of diverse workloads. These instances are ideal for applications that use these resources in equal proportions such as web servers and code repositories. 

t2: Burstable instances designed for low to moderate workloads and cost-effectiveness.
t3: The next generation of burstable instances with improved baseline and burst performance.
m5: Balanced instances with a good combination of compute, memory, and network resources.
m6g: Instances powered by AWS Graviton2 processors, providing excellent price/performance for various workloads.

2. Compute Optimized
        Compute Optimized instances are ideal for compute-bound applications that benefit from high-performance processors. Instances belonging to this category are well suited for batch processing workloads, media transcoding, high-performance web servers, high-performance computing (HPC), scientific modeling, dedicated gaming servers and ad server engines, machine learning inference and other compute-intensive applications.

c5: Compute-optimized instances with high-performance processors, suitable for compute-intensive applications.
c6g: Instances powered by AWS Graviton2 processors, optimized for compute performance.

3. Memory Optimized
        Memory-optimized instances are designed to deliver fast performance for workloads that process large data sets in memory.

R5: Memory-optimized instances, suitable for memory-intensive applications and databases.
R6g: Instances powered by AWS Graviton2 processors, optimized for memory-intensive workloads

4. Accelerated Computing
        Accelerated computing instances use hardware accelerators, or co-processors, to perform functions, such as floating point number calculations, graphics processing, or data pattern matching, more efficiently than is possible in software running on CPUs.

p3: GPU instances designed for machine learning, high-performance computing, and other GPU-accelerated workloads.
g4: Instances with NVIDIA T4 GPUs, suitable for graphics-intensive applications and video transcoding.
inf1: Instances featuring AWS Inferentia chips, optimized for high-performance machine learning inference

5. Storage Optimized
Storage-optimized instances are designed for workloads that require high, sequential read and write access to very large data sets on local storage. They are optimized to deliver tens of thousands of low-latency, random I/O operations per second (IOPS) to applications.

i3: Instances optimized for high-performance, low-latency storage, ideal for large-scale databases and data warehousing.
i3en: Storage-optimized instances with local NVMe-based SSD storage for high-capacity and high-performance workloads

6. HPC Optimized
        High-performance computing (HPC) instances are purpose-built to offer the best price-performance for running HPC workloads at scale on AWS. HPC instances are ideal for applications that benefit from high-performance processors such as large, complex simulations and deep learning workloads.

Hpc7g: instances are designed for compute-intensive high-performance computing (HPC) workloads, such as computational fluid dynamics (CFD), weather forecasting, and molecular dynamics.
Hpc6id: instances are designed for memory-bound and data-intensive high-performance computing (HPC) workloads such as finite element analysis (FEA) for crash simulations, seismic reservoir simulations, and structural simulations.

If you want to check more about the instance family types, click the below link for aws official documentation

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Techie View: Demystifying AWS EC2: A Comprehensive Introduction and In-Depth Look at EC2 Instance Types
Demystifying AWS EC2: A Comprehensive Introduction and In-Depth Look at EC2 Instance Types
Techie View
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