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