AWS EC2 Purchase Options - keshavbaweja-git/guides GitHub Wiki

On Demand

  • Pay by hour/sec
  • No upfront capital investment
  • Scale up or down compute capacity

Spot Instances

  • Request spare AWS EC2 capacity
  • 90% discount on the On Demand cost
  • Suitable for applications with flexible start and end times, low compute prices
  • Spot instances can be interrupted by AWS within two minutes of notification
  • Suitable for fault tolerant and flexible applications - big data, containerized workloads, HPC, stateless web servers, test and development environments
  • Spot Fleets allow you to manage fleet of Spot instances.
  • Pause and Resume applications in case of interruptions
  • Simple to launch - similar to On Demand with one additional parameter, Spot Fleet

Reserved Instances

  • 75% discount on On Demand cost
  • When assigned to a specific AZ, they offer capacity reservation
  • Suitable for applications with steady state usage, long term AWS commitment 1-3 years

Dedicated Host

  • Dedicated physical EC2 server
  • Can be purchased On Demand (hourly)
  • Can be purchased as a Reservation for up to 70% discount on On Demand prices
  • Allows you to reuse server bound licenses