Economical and Robust Provisioning of N-Tier Cloud Workloads: A Multi-Level Control Approach
Resource provisioning for N-tier web applications in Clouds is non-trivial due to at least two reasons. First, there is an inherent optimization conflict between cost of resources and Service Level Agreement (SLA) compliance. Second, the resource demands of the multiple tiers can be different from each other, and varying along with the time. Resources have to be allocated to multiple (virtual) containers to minimize the total amount of resources while meeting the end-to-end performance requirements for the application. In this paper, the authors address these two challenges through the combination of the resource controllers on both application and container levels.