12-13 Cheat Sheet

Last updated Aug 17, 2023 Edit Source

• EC2 has 4 pricing models
  1. On-Demand
  2. Spot
  3. Reserved Instances (RI)
  4. Dedicated
• On-Demand (Least commitment)
  • Low cost and flexible
  • Only pay per hour
  • Use Case: short-term, spiky, unpredictable workloads, and first time apps
  • Ideal when your workloads cannot be interrupted.
• Reserved Instances- up to 75% off (Best long-term value)
  • Use case: steady state or predictable usage
  • Can resell unused reserved instances (Reserved Instance Marketplace)
  • Reduced Pricing is based on Term x Class Offering x Payment Option
  • Payment Terms: 1 year or 3 years
  • Payment Options: All Upfront, Partial Upfront, No Upfront
  • Class Offerings:
    • Standard: Up to 75% reduced pricing compared to on-demand. Some attributes can be modified
    • Convertible: Up to 54% reduced pricing compared to on-demand. Some attributes can be modified
    • NOTE: You cannot purchase Scheduled Reserved Instances at this time. AWS does not have any capacity available for Scheduled Reserved Instances or any plans to make it available in the future.
• Spot Pricing- up to 90% off (Biggest Savings)
  • Request spare computing capacity
  • Flexible start and end times
  • Use case: Can handle interruptions like a server randomly stopping and starting
  • Use case: For non-critical background jobs
  • Instances can be terminated by AWS at anytime
  • If your instance is terminated by AWS, you don’t get charged for a partial hour of usage.
  • If you terminate an instance you will still be charged for any hour that it ran.
• Dedicated Hosting (Most Expensive)
  • Dedicated servers
  • Can be on-demand or reserved (up to 70% off)
  • Use case: When you need a guarantee of isolated hardware (enterprise requirements)