States of EC2 Machine

• Running: VM is up
• Stopped: VM is down. When VM is shutdown compute resources are not allocated, public ip address is deallocated. Storage and private ip will still remain to be allocated
• Terminated: VM is removed.

Preview of Stopped Instance

Preview of Running Instance

Instance Types

• There are many instance types in AWS, So they are grouped into instance families

• Instance Families are

  • General Purpose:

    • CPU to RAM Ratio is Balanced
    • Workloads:
      • Web Servers
      • Dev and Test Environments

  • Compute Optimized:

    • High CPU to RAM Ratio.
    • Workloads:
      • Media servers
      • Scientific MOdeling
      • Machine Learning and other compute intensive

  • Memory Optimized:

    • High RAM to CPU Ratio
    • Workloads:
      • In Memory Databases
      • Cache Servers
      • Hadoop Clusters

  • Storage Optimized:

    • Designed to support high sequential read and write access to data on local storage (disks)
    • Workloads:
      • Data Warehousing
      • Map Reduce and Hadoop
      • OLTP
      • Databases

  • Accelarated Computing:

    • Designed with GPU or FPGA for enabling parallelism
    • Workloads:
      • Gaming
      • Scientific MOdelling
      • 3-D Application Stream
      • Graphics

• For each instance family there are hardware instance Types and then sizes that come into play Refer Here

• Instance type naming convention <instancetype><generation>.<size>

• Examples:

  • t2.micro
  • c4.large

• Hardware specs

• Sizes in Amazon generally have a scaling factor

  • micro
  • small
  • large
  • 2xlarge
  • 4xlarge

• Along with these instances there are two instance types

  • Burstable Instances
  • Nitro Instances

Pricing Calculator

• Old Pricing Calculator
• New Pricing Calculator
• Exercise: Create an estimate for exectuting an application with 3 servers two linux and one windows server
  • Linux Server will be using more RAM
  • Windows Server should be quick with Storage

Instance Purchasing Options

• On-demand
• Reserved
• Scheduled
• Spot
• Dedicated

Can i Change instance types of machine which has been created?

• Yes, But you need to stop your machine.

• For the machine which is running the option to change size will be disabled