title: A green strategy for federated and heterogeneous clouds with communicating workloads.
abstract: Providers of cloud environments must tackle the challenge of configuring their system to provide maximal performance while minimizing the cost of resources used. However, at the same time, they must guarantee an SLA (service-level agreement) to the users. The SLA is usually associated with a certain level of QoS (quality of service). As response time is perhaps the most widely used QoS metric, it was also the one chosen in this work. This paper presents a green strategy (GS) model for heterogeneous cloud systems. We provide a solution for heterogeneous job-communicating tasks and heterogeneous VMs that make up the nodes of the cloud. In addition to guaranteeing the SLA, the main goal is to optimize energy savings. The solution results in an equation that must be solved by a solver with nonlinear capabilities. The results obtained from modelling the policies to be executed by a solver demonstrate the applicability of our proposal for saving energy and guaranteeing the SLA.
authors.affiliation: Department of Computer Science & INSPIRES, University of Lleida, Jaume II 69, 25001 Lleida, Spain.
authors.forename: Jordi
authors.identifier: 0000-0002-1660-0380
authors.initials: J
authors.lastname: Mateo
authors.affiliation: Department of Computer Science & INSPIRES, University of Lleida, Jaume II 69, 25001 Lleida, Spain.
authors.forename: Jordi
authors.identifier: 0000-0002-8188-4914
authors.initials: J
authors.lastname: Vilaplana
authors.affiliation: Department of Mathematics, University of Lleida, Jaume II 73, 25001 Lleida, Spain.
authors.forename: Lluis M
authors.initials: LM
authors.lastname: Plà
authors.affiliation: Department of Computer Science & INSPIRES, University of Lleida, Jaume II 69, 25001 Lleida, Spain.
authors.forename: Josep Ll
authors.initials: JL
authors.lastname: Lérida
authors.affiliation: Department of Computer Science & INSPIRES, University of Lleida, Jaume II 69, 25001 Lleida, Spain.
authors.forename: Francesc
authors.identifier: 0000-0002-4830-9184
authors.initials: F
authors.lastname: Solsona
mesh_terms: D000465:Algorithms; D003195:Computer Communication Networks / Q000191:economics*; D006801:Humans; D020407:Internet / Q000191:economics*; D059205:Renewable Energy