History of Spot Instances: Analyzing Spot Instance Pricing Change
Summary
This article traces the history of spot instances from AWS’s original auction-based model (2009–2017) to the shift to provider-managed price smoothing, discusses the volatility, transparency issues, and research that revealed hidden pricing mechanics, and contrasts this with Rackspace Spot’s open-market auction approach introduced in 2024. It also provides a comparative view across major providers and practical guidance on how pricing dynamics have shaped usage and strategies for cost optimization.