A Cost-Effective Strategy for Storing Scientific Datasets with Multiple Service Providers in the Cloud

Cloud computing provides scientists a platform that can deploy computation and data intensive applications without infrastructure investment. With excessive cloud resources and a decision support system, large generated datasets can be flexibly 1) stored locally in the current cloud, 2) deleted and regenerated whenever reused or 3) transferred to cheaper cloud service for storage. However, due to the pay-as-you-go model, the total application cost largely depends on the usage of computation, storage and bandwidth resources, hence cutting the cost of cloud-based data storage becomes a big concern for deploying scientific applications in the cloud. In this paper, we propose a novel strategy that can costeffectively store large generated datasets with multiple cloud service providers. The strategy is based on a novel algorithm that finds the trade-off among computation, storage and bandwidth costs in the cloud, which are three key factors for the cost of data storage. Both general (random) simulations conducted with popular cloud service providers’ pricing models and three specific case studies on real world scientific applications show that the proposed storage strategy is highly cost effective and practical for runtime utilisation in the cloud. 1