DeepAI AI Chat
Log In Sign Up

Cloud Index Tracking: Enabling Predictable Costs in Cloud Spot Markets

by   Supreeth Shastri, et al.
University of Massachusetts Amherst

Cloud spot markets rent VMs for a variable price that is typically much lower than the price of on-demand VMs, which makes them attractive for a wide range of large-scale applications. However, applications that run on spot VMs suffer from cost uncertainty, since spot prices fluctuate, in part, based on supply, demand, or both. The difficulty in predicting spot prices affects users and applications: the former cannot effectively plan their IT expenditures, while the latter cannot infer the availability and performance of spot VMs, which are a function of their variable price. To address the problem, we use properties of cloud infrastructure and workloads to show that prices become more stable and predictable as they are aggregated together. We leverage this observation to define an aggregate index price for spot VMs that serves as a reference for what users should expect to pay. We show that, even when the spot prices for individual VMs are volatile, the index price remains stable and predictable. We then introduce cloud index tracking: a migration policy that tracks the index price to ensure applications running on spot VMs incur a predictable cost by migrating to a new spot VM if the current VM's price significantly deviates from the index price.


page 1

page 2

page 3

page 4


No Reservations: A First Look at Amazon's Reserved Instance Marketplace

Cloud users can significantly reduce their cost (by up to 60%) by reserv...

No-regret Learning in Price Competitions under Consumer Reference Effects

We study long-run market stability for repeated price competitions betwe...

Fuel consumption elasticities, rebound effect and feebate effectiveness in the Indian and Chinese new car markets

China and India, the world's two most populous developing economies, are...

Greater search cost reduces prices

The optimal price of each firm falls in the search cost of consumers, in...

Delay and Price Differentiation in Cloud Computing: A Service Model, Supporting Architectures, and Performance

Many cloud service providers (CSPs) provide on-demand service at a price...

Hedonic Prices and Quality Adjusted Price Indices Powered by AI

Accurate, real-time measurements of price index changes using electronic...

Skyplane: Optimizing Transfer Cost and Throughput Using Cloud-Aware Overlays

Cloud applications are increasingly distributing data across multiple re...