Topic
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 published on a yearly basis
Papers
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01 Sep 2015TL;DR: The goal of this paper is to analyse and compare the TCP/IP packet header features of incoming traffic that identifies remote hosts according to their Operating System to detect the true source of a packet during spoofed DDoS attack.
Abstract: Spoofing of IP is a key attribute of Distributed Denial of Service (DDoS) attack that consumes Cloud resources and network bandwidth within a short period of time. This is costly to both the providers and users of Cloud. Cloud computing offers a metered service, which uses pay-per use. Therefore providing a high available Cloud will improve the Cloud provider's reputation and financial proceeds. To the Cloud users, it solely depends on the provider for its resources therefore it must always be available as contained in the service level agreement (SLA). The goal of this paper is to analyse and compare the TCP/IP packet header features of incoming traffic that identifies remote hosts according to their Operating System. This is used to detect the true source of a packet during spoofed DDoS attack. Our solution further analyses the observed final TTL value in both active and passive stage of the OS fingerprints to cater for false negative during detection. We demonstrated our proposed solution on a Xen Cloud Platform Test bed.
25 citations
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13 Aug 2006TL;DR: An ontology based Service Level Agreement formalisation is described, discussing Ontology Adoption, SLA Instance Creation and Validation, followed by a breakdown and discussion of the concepts.
Abstract: This paper describes an ontology based Service Level Agreement formalisation. OWL and SWRL are chosen to express the ontologies. Use of the ontologies, discussing Ontology Adoption, SLA Instance Creation and Validation is given, followed by a breakdown and discussion of the concepts. Ontologies are grouped by generality and diagrammatic representations are given. The SLA ontology is discussed in context of the telecommunications domain.
25 citations
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30 Nov 1999TL;DR: In this paper, a system, method and article of manufacture are provided for affording an operations architecture to implement a local service activation management system, which is in turn supported by support infrastructure.
Abstract: A system, method and article of manufacture are provided for affording an operations architecture to implement a local service activation management system. First, a physical environment is provided for supporting a local service activation management system. The physical environment is managed with managing hardware which is in turn supported by support infrastructure. Further, a common integration platform is implemented. In use, operation management procedures are executed such as disaster recovery, scheduled maintenance, roll outs and release, production control, toolset procedures, service level agreement generation, operations level agreement generation, and service level reporting.
25 citations
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27 May 2013TL;DR: This work considers the goals of minimizing Service Level Agreement violations and minimizing power consumption, and proposes three methods of dynamically switching strategies, and evaluates these methods through simulation.
Abstract: Applications are shifting into large scale, virtualized data centres that provide resources on a pay-per-usage basis. Data centres must minimize resource consumption while providing enough resources to meet application requirements. To meet highly variable application demands, a dynamic approach to virtual machine (VM) management is required. This involves three basic management operations: (i) placing newly arrived VMs, (ii) migrating (moving) VMs off of highly utilized machines to avoid performance degradation, and (iii) migrating VMs off of underutilized machines so that they may be shut down to save power. We define a management strategy to consist of a set of policies that guide these three operations. We consider the goals of minimizing Service Level Agreement violations and minimizing power consumption. Developing a management strategy to achieve both of these goals is challenging, as the goals are often in conflict. We propose achieving both goals through dynamically switching between two management strategies, each with a single goal, depending on current data centre state. We propose three methods of dynamically switching strategies, and evaluate these methods through simulation. Dynamic strategy switching offers improved results over a single management strategy.
25 citations
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07 Jun 2010TL;DR: In the GAMES project, energy efficiency improvement goals are tackled based on exploiting adaptivity, on building a knowledge base for evaluating the impact of the applications on the service centre energy consumption, and exploiting the application characteristics for an improved use of resources.
Abstract: The vision of the recently started GAMES European Research project is a new generation of energy efficient IT Service Centres, designed taking into account both the characteristics of the applications running in the centre and context-aware adaptivity features that can be enabled both at the application level and within the IT and utility infrastructure. Adaptivity at the application level is based on the service-oriented paradigm, which allows a dynamic composition and recomposition of services to guarantee Quality of Service levels that have been established with the users. At the infrastructure level, adaptivity is being sought with the capacity of switching on and off dynamically the systems components, based on the state of the service centre. However, these two perspectives are usually considered separately, managing at different levels applications and infrastructure. In addition, while performance and cost are usually the main parameters being considered both during design and at run time, energy efficiency of the service centre is normally not an issue. However, given that the impact of service centres is becoming more and more important in the global energy consumption, and that energy resources, in particular in peak periods, are more and more constrained, an efficient use of energy in service centres has become an important goal. In the GAMES project, energy efficiency improvement goals are tackled based on exploiting adaptivity, on building a knowledge base for evaluating the impact of the applications on the service centre energy consumption, and exploiting the application characteristics for an improved use of resources.
25 citations