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In the today Internet of Services, one of the challenges of Application Service Providers (ASPs) is to fulfill the QoS requirements stated in the Service Level Agreements (SLAs) established with different consumers and to minimize the investment and management costs. Cloud computing is the promising solution for ASPs that increasingly demand for an elastic infrastructure. In this paper, we formulate...
Cloud computing has emerged as a new paradigm, which is the long-held dream of computing as utility, customer get it on an on-demand model. When discuss about performance requirement and QoS (Quality of Service) of service, it is hard to tackle these problem in a round consideration. In this work we propose an SLA-aware (Service Level Agreement aware) framework ¨C cloud service provider (CSP) for...
High performance platforms composed of commodity computing resources, such as grids and peer-to-peer systems, have greatly evolved and assumed an important role in the last decade. Nevertheless, their wide commercial use still depends on the establishment of an effective quality of service (QoS) infrastructure in those environments. For this reason, a variety of proposals have recently emerged in...
Digital Home (DH) offers a lot of business opportunities. Therefore, DH is a place to be for industrialists such as Telecommunications Operators, Services Providers, Network, Devices and Consumer Electronics Manufacturers. DH raises many challenges about, among others, Management (i.e., Configuration and Deployment, Healing, Protection, and Optimization), Quality of Service (QoS), Home Automation,...
Dynamic establishment of a web service's Service Level Agreement (SLA) document that maintains end-to-end Quality of Service (QoS) requirements has been identified as a cause of delay in developing web service based solutions. This is because service providers and consumers are usually engaged in a time consuming negotiation process. In order to accelerate the negotiation process, this paper proposes...
Process-driven service-oriented architectures (SOA) need to cope with constant changing requirements of various compliance requirements, such as quality of service (QoS) constraints within service level agreements (SLA). To the best of our knowledge, only little evidence is available if and in how far process-driven SOAs deal with the evolution of the requirements. In this work, we evaluate an incremental...
The advancements in distributed computing have driven the emergence of Service Oriented infrastructures that allow for on-demand provision of ICT assets. Taking into consideration the complexity of distributed environments, significant challenges exist in providing and managing the offered on-demand resources with the required level of Quality of Service (QoS), especially for real-time interactive...
Network performance measurements have been broadly used in order to debug and to assess the reliability of the network. In general performance measurement is a resource consuming process, which in practice derives in hardly scalable systems. However, in order to control and monitor network resource usage and to assess the quality of multimedia traffic, it is broadly accepted that efficient and scalable...
According to the Internet of Services vision, composite services are created by composing services to complex business processes. The relationships between services in a composition are defined by Service Level Agreements (SLAs). Managing composite SLAs is a complex task which is currently performed manually. In this paper we present an approach for automating the management of composite SLAs by exploiting...
Current service platforms, e.g. Cloud solutions, do not adequately address the requirements exposed from certain kind of services like real-time services. Infrastructure as a Service Platform (IaaS) supporting these service requirements, such as quality of service of the resources provided, heavily depend on measurements in order to be able to verify that the quality of service as contracted in a...
Summary form only given. Accountability in Service Oriented Architecture (SOA) is a capability of making business processes across all participants (services, applications and people) accountable in terms of both business logic and Quality of Services (QoS). While accountability is a critical mechanism to enhance trust between collaborative services, there is the lack of standard accountability support...
The problem of dynamic service composition of SOA systems based on QoS requirements may be framed as one of automatic generation of policies according to desirable level of QoS characteristics. In this paper, we provide a model driven approach to develop an optimal service composition policies for SOA systems with defined SLAs metrics and QoS constraints. Our work utilizes ideas from Dynamic Programming...
In this paper we discuss the design and experimental evaluation of a middleware architecture that enables Service Level Agreement (SLA)-driven dynamic configuration, management and optimization of cloud resources and services. This architecture has been designed in order to respond effectively to the Quality of Service (QoS) requirements of the cloud customer applications. Typically, an application...
When using SOAs in mission critical environments, quality and performance related aspects may not be ignored. Service Level Agreements (SLAs) have to be defined and applied during runtime. In this paper we present a method to enhance an existing SOA container to take into account Quality of Service (QoS) related aspects and enforce these aspects during runtime using feedback controlled priority adaptations...
Service Oriented Architecture (SOA) and web service technology plays a great role in enabling the integration of different systems from different enterprises and platforms. Usually, the service provided to consumers in such systems requires a specific level of quality to be ensured by the providers. So, the consumer and provider enter into a mutual Service Level Agreement (SLA) which is a contract...
In service oriented architectures (SOA), the non-functional properties of services have been recognized to be highly important in addition to the functionality of services as a means to differentiate services according to quality considerations. Service level agreements (SLAs) are formalized contracts between service providers and service consumers that are used to define quality of service (QoS)...
Grid computing systems need to achieve high levels of Quality of Service (QoS) necessary for enterprise applications in science and industry. A Service Level Agreement (SLA) specification provides a formal method for describing QoS requirements. WS-Agreement is a language and protocol designed for advertising the capabilities of providers and creating agreements based on initial offers, and for monitoring...
D-Grid is a German national grid initiative founded by the German Federal Ministry of Education and Research. It provides a frame for the collaboration of researchers across Germany and offers access to distributed services and resources. The SLA4D-Grid project will enhance D-Grid by creating a service level agreement (SLA) layer which is transparently integrated into D-Grid and accessible for the...
In the Web services environment, appropriate guarantee for the service quality can maximize the ability of web services and ensure the services to be carried out effectively and controllable, and that's what SLA contracts can offer. An SLA(service level agreement) is a contract agreed between a service client and a service provider which defines a series of service quality characters and metrics....
Notice of Violation of IEEE Publication Principles"Research on SLA Management Model in Service Operation Support System"by Ke Xu, Xiaoqi Zhang, Meina Song, Junde Song, in the Proceedings of the 2009 International Conference on Wireless Communications, Networking and Mobile Computing (WiCom2009)After careful and considered review of the content and authorship of this paper by a duly constituted...
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