Savings Plans vs Reserved Instances for mixed compute
WHAT IT TESTS: commitment-discount strategy. OUTLINE: Compute Savings Plans cover EC2, Fargate, and Lambda flexibly; EC2 Instance Plans and RIs trade flexibility for slightly deeper discounts. RED FLAG: over-committing or ignoring usage variability.
WHAT IT TESTS: whether you can choose commitment instruments for a heterogeneous fleet and size the commitment safely. ANSWER OUTLINE: Compute Savings Plans apply an hourly dollar commitment across EC2, Fargate, and Lambda with full flexibility on region, family, and OS; EC2 Instance Savings Plans and Standard RIs give slightly larger discounts but lock you to a family or region. For a mixed fleet recommend Compute Savings Plans for flexibility. Model the commitment to the stable usage floor from historical data, not the peak.
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- #cloud
- #aws
- #savings-plans
- #cost-optimization
- #reserved-instances
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