Evaluating architectures for independently auditing service level agreements

Barbosa, Ana Carolina; Sauve, J.; Cirne, Walfredo; Carelli, Mirna

doi:10.1016/j.future.2006.01.001

Cited by 19 publications

(4 citation statements)

References 5 publications

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“…Some recent works on managing distributed system services have focused on different aspects of QoS auditing: such as trusted mediator versus in-service implementations [10], scalability and reusability needs of auditor [15], and system architectural considerations for auditing [16,17]. A common point in all these works (and our work too) is the need to deal with trust deficiency between the service provider and consumer, which gets exacerbated in a cloud setting.…”

Section: Related Work On Sla Assessmentmentioning

confidence: 99%

SLA evaluation with on-the-fly measurements of distributed service implementation over clouds

Ravindran

Adiththan

Iannelli

2014

Proceedings of the 6th International Workshop on Principles of Engineering Service-Oriented and Cloud Systems

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Given the business mode of offering computing services to customers in a cloud setting, a major question arises: how good are the services of a cloud provider when compared to that of other providers. The paper attempts to answer the question by describing a methodology to measure the various cloud parameters (such as VM cycles and number of VM instances) at run-time and map them onto meaningful service-level attributes. The paper provides a concrete definition of the service attributes experienced by the client application: such as availability, agility, and elasticity, in terms of the underlying cloud infrastructure parameters (i.e., VM instances and network bandwidth). Since the IaaS parameters are hard to measure directly, we resort to a measurement methodology that maps the client-visible PaaS-layer service attributes onto the underlying IaaS parameters exported by the cloud provider. Our measurement methodology satisfies the cloud testing needs: stealthiness and non-intrusiveness, while minimizing the measurement overhead.

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Section: Related Work On Sla Assessmentmentioning

confidence: 99%

SLA evaluation with on-the-fly measurements of distributed service implementation over clouds

Ravindran

Adiththan

Iannelli

2014

Proceedings of the 6th International Workshop on Principles of Engineering Service-Oriented and Cloud Systems

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“…They found that in most cases, migration overhead is acceptable but cannot be disregarded, especially in systems where service availability and responsiveness are governed by strict SLAs. In such systems, service providers and consumers agree upon a minimum service level and non-compliance to such agreement may incur penalties to providers [2].…”

Section: Related Workmentioning

confidence: 99%

Cost-aware live migration of services in the cloud

Breitgand¹,

Kutiel²,

Raz³

2010

Proceedings of the 3rd Annual Haifa Experimental Systems Conference

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Live migration of virtual machines is an important component of the emerging cloud computing paradigm. While live migration provides extreme versatility of management, it comes at a price of degraded service performance during migration. The bulk of studies devoted to live migration of virtual machines focus on the duration of the copy phase as a primary metric of migration performance. While shorter down times are clearly desirable, the pre-copy phase imposes an overhead on the infrastructure that may result in severe performance degradation of the migrated and collocated services offsetting the benefits accrued through live migration.We observe that there is a non-trivial trade-off between minimizing the copy phase duration and maintaining an acceptable quality of service during the pre-copy phase, and introduce a new model to quantify this trade-off. We then show that using our model, an optimal migration schedule can be efficiently calculated. Finally, we simulate, using real traces, live migrations of a virtual machine running a web server and compare the migration cost using our algorithm and commonly used livemigration methods.

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“…Campbell et al [5] propose the Quality of Service Architecture (QoS-A) incorporating the notion of flow, service contract and flow management through QoS properties. Barbosa et al outline in [3] different architectural configurations to enable the auditing of SLA and to evaluate their efficiencies. The WSLA framework [17] introduces a runtime architecture comprising several SLA monitoring services.…”

Section: Related Workmentioning

confidence: 99%

Normative Management of Web Service Level Agreements

Herssens

Faulkner

Jureta

2010

Lecture Notes in Computer Science

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Abstract. Service Level Agreements (SLAs) are used in ServiceOriented Computing to define the obligations of the parties involved in a transaction. SLAs define these obligations, including for instance the expected service levels to be delivered by the provider, and the payment expected from the client. The obligations of the parties must be made explicit prior to the transaction, and a mechanism should be available to control the interaction, in order to ensure that the obligations are met. We outline a norm-oriented multiagent system (NoMAS) architecture that is combined with the service-oriented architecture in order to support the definition, management, and control of SLAs between the service clients and service providers.

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Evaluating architectures for independently auditing service level agreements

Cited by 19 publications

References 5 publications

SLA evaluation with on-the-fly measurements of distributed service implementation over clouds

SLA evaluation with on-the-fly measurements of distributed service implementation over clouds

Cost-aware live migration of services in the cloud

Normative Management of Web Service Level Agreements

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