1. 종류

1-1) On-Demand Instances

• short workload, predicatable pricing, pay by second

• Pay for what you use:

  • Linux or Windows - biling per second, after the first minute
  • All other operating systems - billing per hour

• Has the highest cost but no upfront payment

• No long-term commitment

• Recommended for short-term and un-interrupted workloads, where you can’t predict how the application will behave

1-2) Reserved (1 & 3 years)

• Reserved Instances - long workloads
• Convertible Reserved Instances - long workloads with flexible instances
• Up to 72% discount compared to On-demand
• You reserve a specific instance attributes (Instance Type, Region, Tenancy, OS)
• Reservation Period - 1 year (+discount) or 3 years (++discount)
• Payment Options - No Upfront (+), Partial Upfront (++), All Upfront (++)
• Reserved Instance’s Scope - Regional or Zonal (reserve capacity in an AZ)
• Recommended for steady-state usage applications (think database)