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Service-level agreement

About: Service-level agreement is a research topic. Over the lifetime, 4358 publications have been published within this topic receiving 75333 citations. The topic is also known as: SLA.


Papers
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Proceedings ArticleDOI
27 Jun 2015
TL;DR: A virtual machine consolidation algorithm with usage prediction (VMCUP) for improving the energy efficiency of cloud data centers and reduces the total migrations and the power consumption of the servers while complying with the service level agreement.
Abstract: Virtual machine consolidation aims at reducing the number of active physical servers in a data center, with the goal to reduce the total power consumption. In this context, most of the existing solutions rely on aggressive virtual machine migration, thus resulting in unnecessary overhead and energy wastage. This article presents a virtual machine consolidation algorithm with usage prediction (VMCUP) for improving the energy efficiency of cloud data centers. Our algorithm is executed during the virtual machine consolidation process to estimate the short-term future CPU utilization based on the local history of the considered servers. The joint use of current and predicted CPU utilization metrics allows a reliable characterization of overloaded and under loaded servers, thereby reducing both the load and the power consumption after consolidation. We evaluate our proposed solution through simulations on real workloads from the Planet Lab and the Google Cluster Data datasets. In comparison with the state of the art, the obtained results show that consolidation with usage prediction reduces the total migrations and the power consumption of the servers while complying with the service level agreement.

46 citations

Journal ArticleDOI
TL;DR: New prediction algorithm for determination of overloaded hosts as well as novel multi-criteria decision making techniques to select virtual machines to optimize energy, SLA, and number of migrations in cloud data centers are proposed.
Abstract: Increasing demand for acquiring diverse range of services has led to the establishment of huge energy hungry cloud data centers all around the world. Cloud providers face with major concerns to reduce their energy consumption while ensuring high quality of service based on the Service Level Agreement (SLA). Consolidation is proposed as one of the most effective techniques for online energy saving in cloud environments with dynamic workloads. This paper proposes novel proactive online resource management policies to optimize energy, SLA, and number of migrations in cloud data centers. More precisely, this paper proposes new prediction algorithm for determination of overloaded hosts as well as novel multi-criteria decision making techniques to select virtual machines. The results of simulations using CloudSim simulator shows up to 98.11 % reduction in the output metric which is representative of energy consumption, SLA violation, and number of migrations, in comparison with state of the art.

46 citations

Patent
10 Apr 2006
TL;DR: In this article, a Wholesaler dynamically identifies one of a plurality of AAA services at a remote domain to route an access request to and selects the AAA service based on a set of rules applied to information which has been received dynamically from the plurality.
Abstract: In a first aspect of the present invention, a Wholesaler dynamically identifies one of a plurality of AAA services at a remote domain to route an access request to. The AAA service is selected based upon a set of rules applied to information which has been received dynamically from the plurality of AAA services and is indicative of load and status of the plurality of AAA services. In a second aspect of the present invention, a Wholesaler, based upon a Service Level Agreement (SLA) between the Wholesaler and a user, routes the user to one of a plurality of sub-service providers.

46 citations

Patent
20 Jul 2005
TL;DR: In this article, a method and integrated hardware system for dynamic bandwidth allocation in EPONs is proposed, which provides superior upstream transmission characteristics including QoS considerations consistent with any Service Level Agreement that exists between a customer and a service provider.
Abstract: A method and integrated hardware system for dynamic bandwidth allocation in EPONs which—in sharp contrast to the prior art—provides superior upstream transmission characteristics including QoS considerations consistent with any Service Level Agreement that exists between a customer and a service provider. Advantageously, our inventive method and system for dynamic bandwidth allocation provides fair and efficient upstream bandwidth management in addition to enhanced traffic performance for customer traffic within the EPON. For a service provider, our invention permits the deployment of intelligent traffic management and QoS characteristics capable of supporting existing or novel voice, video, and data services over the EPON.

46 citations

Book ChapterDOI
20 Apr 2005
TL;DR: This paper introduces a process calculus where QoS attributes are first class objects and identifies a minimal set of primitives that allow capturing in an abstract way the ability to control and coordinate services in presence of QoS constraints.
Abstract: The definition of suitable abstractions and models for identifying, understanding and managing Quality of Service (QoS) constraints is a challenging issue of the Service Oriented Computing paradigm. In this paper we introduce a process calculus where QoS attributes are first class objects. We identify a minimal set of primitives that allow capturing in an abstract way the ability to control and coordinate services in presence of QoS constraints.

46 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202339
2022106
2021183
2020233
2019237
2018255