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Phase 4 · Compute Services

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Spot & Reserved Instances

Part of the Cloud Computing Roadmap.

Summary

Spot instances use spare provider capacity at a steep discount but can be reclaimed with little warning; reserved instances commit to usage over 1-3 years for a discount — both are cost-optimization levers beyond on-demand pricing.

How to Learn This

  • 1Compare on-demand, spot, and reserved pricing for the same instance type.
  • 2Learn what kind of workloads fit spot instances well (fault-tolerant, interruptible batch jobs).
  • 3Understand why reserved instances require confidence in long-term, predictable usage.

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Choosing Compute: VM vs Container vs Serverless

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Compute Cost Optimization

More topics in Compute Services

Virtual Machines (EC2, Compute Engine, Azure VMs)Instance Types & SizingAuto Scaling GroupsLoad Balancing ComputeContainers Overview (Docker Basics)Container Orchestration Overview (Kubernetes / ECS)Serverless Computing (Lambda / Functions)Choosing Compute: VM vs Container vs ServerlessCompute Cost Optimization
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