AWS Classroom Series – 06/Aug/2020

AWS EC2 Concepts (Contd..)

• AWS is by default a multi tenant environment

Instance Types

• When we launch an ec2 instance we can choose instance type, so to to simplify amazon categorizes instances into different purpose

• Categorization by purpose

  • General Purpose:

    • Provide a balance of compute, memory and networking resources.
    • Under General Purpose Amazon has different Instance Types and Sizes
    • Instance Types under General Purpose are
      • A1
      • M5 & M5a
      • M6g and M6gd
      • T2, T3 and T3a

  • Compute Optimized:

    • Are ideal for compute-bound applications, they generally have high cpu to memory ratio

  • Memory Optimized:

    • Are designed to deliver faster performance for workloads that process large data in memory, They have high memory to cpu ratio.

  • Storage Optimized:

    • Are designed for workloads that require high, read and write speeds on local storage.

  • Accelerated Computing

    • Here we have GPU (Graphical processing units) & FPGA (Field Programmable Gate Arrays)

• For every instance type we will have sizes, these sizes determine

  1. vcpus
  2. memory
  3. Network Speed

Instance Life cycle

• Instance Life cycle States
• Instance state:
  • Pending: Ec2 instance is preparing to enter the running state. Instance usage will not be billed.
  • running: The instance is running & ready for use. Instance usage will be billed.
  • stopping: When you are Stop-Hibernating Instance usage will be billed, if your are stopping, you will not be billed
  • stopped: not billed
  • shutting down : not billed
  • Terminate: ec2 instance is permanently deleted and not billed
• AWS EC2 instance will have the following which are charged
  • Instance
  • Hard disk
  • AMI (Third party AMIs)
• Any AWS Service may have different pricing across regions (Slightly different prices) Refer Here
• In EC2 instance depending on which OS you use in AMI, there might be slight differences in pricing
• Some AMI’s from market place will have software costs

Instance Purchasing Options

• EC2 provides the following purchasing options to optimize your costs based on your needs
  • On-Demand instances
  • Savings Plan
  • Reserved Instances
  • Scheduled Instances
  • Spot Instances
  • Dedicated Hosts
  • Dedicated Instances
  • Capacity Reservations

On-Demand instances

• On-Demand instances will have no long term commitments, It is default Purchasing OPtion for ec2 instances. You pay for what you use.
• You have full control over instance lifecycle.
• On-Demand Instances lets you pay for the compute capacity by the hour or second (minimum of 60 seconds) with no long-term commitments.

Create estimate of AWS Costs by using Pricing Calculator

• Refer Here