What is the difference between EC2 On-Demand, Reserved, and Spot Instances?

Question

Sajanvethakumar Francis · Accepted Answer

On-Demand: Pay per hour/second, no commitment. Flexible but most expensive. Reserved Instances: Commit to 1 or 3 years, pay upfront/partial. Up to 75% cheaper than On-Demand. Best for steady workloads. Spot Instances: Bid unused capacity at huge discounts (up to 90%). Can be terminated anytime when AWS reclaims capacity. Best for fault-tolerant, flexible workloads (batch jobs, big data).

What is the difference between EC2 On-Demand, Reserved, and Spot Instances?

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