Self-Adaptive and Resource-Efficient SLA Enactment for Cloud Computing Infrastructures

Maurer, Michael; Brandić, Ivona; Sakellariou, Rizos

doi:10.1109/cloud.2012.55

Cited by 31 publications

(20 citation statements)

References 23 publications

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“…Many of these items can be achieved through careful management and enforcement of service level agreements (SLAs) with cloud providers. Though enforcement of SLAs is difficult, due to transparency issues with cloud providers, Maurer et al [6] and Emeakaroha et al [7] present methods for SLA enactment and monitoring that organizations may find useful to consider.…”

Section: A Protecting Against Rogue Administratorsmentioning

confidence: 99%

Insider Threats to Cloud Computing: Directions for New Research Challenges

Claycomb

Nicoll

2012

2012 IEEE 36th Annual Computer Software and Applications Conference

108

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Cloud computing related insider threats are often listed as a serious concern by security researchers, but to date this threat has not been thoroughly explored. We believe the fundamental nature of current insider threats will remain relatively unchanged in a cloud environment, but the paradigm does reveal new exploit possibilities. The common notion of a cloud insider as a rogue administrator of a service provider is discussed, but we also present two additional cloudrelated insider risks: the insider who exploits a cloud-related vulnerability to steal information from a cloud system, and the insider who uses cloud systems to carry out an attack on an employer's local resources. We also characterize a hierarchy of administrators within cloud service providers, give examples of attacks from real insider threat cases, and show how the nature of cloud systems architectures enables attacks to succeed. Finally, we discuss our position on future cloud research.

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Section: A Protecting Against Rogue Administratorsmentioning

confidence: 99%

Insider Threats to Cloud Computing: Directions for New Research Challenges

Claycomb

Nicoll

2012

2012 IEEE 36th Annual Computer Software and Applications Conference

108

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“…A prototype for an autonomic SLA enhancement is discussed by Maurer et al [Maurer et al, 2012]. It behaves as a resource parameter reconfiguration tool at virtual machine level of cloud infrastructures, with the main advantage of reducing SLA violations and of optimizing resource utilisation.…”

Section: Related Workmentioning

confidence: 99%

Towards Automatic Service Level Agreements Information Extraction

Marco

Ferrucci

Kechadi

et al. 2016

Proceedings of the 6th International Conference on Cloud Computing and Services Science

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Abstract:Information systems and computing capabilities are delivered through the Internet in the form of services; they are regulated by a Service Level Agreement (SLA) contract co-signed by a generic Application Service Provider (ASP) and the end user(s), as happens for instance in the cloud. In such a type of contract several clauses are established; they concern the level of the services to guarantee, also known as quality of service (QoS) parameters, and the penalties to apply in case the requirements are not met during the SLA validity time, among others. SLA contracts use legal jargon, indeed they have legal validity in case of court litigation between the parties. A dedicated contract management facility should be part of the service provisioning because of the contractual importance and contents. Some work in literature about these facilities rely on a structured language representation of SLAs in order to make them machine-readable. The majority of these languages are the result of private stipulation between private industries and not available for public services where SLAs are expressed in common natural language instead. In order to automate the SLAs management, the first step is to recognise the documents. In this paper an investigation towards SLAs text recognition is presented; the proposal is driven by an analysis of the contractual contents necessary to be automatically extracted in order to facilitate possible criminal investigations.

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“…The VM-level [12,13] and PM-level [14,15] architecture result in acceptable balance between globally-optimal benefit and overhead. In particular, although approaches like [13] aim for perapplication, they only assume one application per-VM.…”

Section: Related Workmentioning

confidence: 99%

“…In particular, although approaches like [13] aim for perapplication, they only assume one application per-VM. Thus, it can be categorized as VM-level architecture.…”

Section: Related Workmentioning

confidence: 99%

“…In addition, their QoS modeling rely on static and offline approaches. [13] propose a framework for SLA enactment in the cloud, they have also considered the objective dependency. Nevertheless, they only aim for the fundamental objective-dependency (e.g, throughput and cost per-VM) and do not take the objective-dependency caused by QoS interference into account; our architecture covers both, however.…”

Section: Related Workmentioning

confidence: 99%

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Symbiotic and sensitivity-aware architecture for globally-optimal benefit in self-adaptive cloud

Chen

Bahsoon

2014

Proceedings of the 9th International Symposium on Software Engineering for Adaptive and Self-Managing Systems

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Due to the uncertain and dynamic demand for Quality of Service (QoS) in cloud-based systems, engineering self-adaptivity in cloud architectures require novel approaches to support ondemand elasticity. The architecture should dynamically select an elastic strategy, which optimizes the global benefit for QoS and cost objectives for all cloud-based services. The architecture shall also provide mechanisms for reaching the strategy with minimal overhead. However, the challenge in the cloud is that the nature of objectives (e.g., throughput and the required cost) and QoS interference could cause overlapping sensitivity amongst intraand inter-services objectives, which leads to objective-dependency (i.e., conflicted or harmonic) during optimization. In this paper, we propose a symbiotic and sensitivity-aware architecture for optimizing global-benefit with reduced overhead in the cloud. The architecture dynamically partitions QoS and cost objectives into sensitivity independent regions, where the local optimums are achieved. In addition, the architecture realizes the concept of symbiotic feedback loop, which is a bio-directional self-adaptive action that not only allows to dynamically monitor and adapt the managed services by scaling to their demand, but also to adaptively consolidate the managing system by re-partitioning the regions based on symptoms. We implement the architecture as a prototype extending on decentralized MAPE loop by introducing an Adaptor component. We then experimentally analyze and evaluate our architecture using hypothetical scenarios. The results reveal that our symbiotic and sensitivity-aware architecture is able to produce even better global benefit and smaller overhead in contrast to other non sensitivity-aware architectures.

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Self-Adaptive and Resource-Efficient SLA Enactment for Cloud Computing Infrastructures

Cited by 31 publications

References 23 publications

Insider Threats to Cloud Computing: Directions for New Research Challenges

Insider Threats to Cloud Computing: Directions for New Research Challenges

Towards Automatic Service Level Agreements Information Extraction

Symbiotic and sensitivity-aware architecture for globally-optimal benefit in self-adaptive cloud

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