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This paper presents a game theoretic model and an iterative bidding framework for the service request prioritizing and scheduling problem in Software as a Service (SaaS) environments. We focus on a type of settings in which the service provider's existing capacity is over demanded and customers' service requests are constrained with completion times. To gain more profit, the provider needs to prioritize...
Monitoring provides well established means to track the exchanged messages in cross-organizational processes. Complex Event Processing (CEP) is a technology used by monitoring systems that aims to process incoming events and generate high-level information. Current implementation of CEP has performance issues when the processing of events involves calling a composition of services to generate the...
Different evaluator entities, either human agents (e.g., experts) or software agents (e.g., monitoring services), are involved in the assessment of QoS parameters of candidate services, which leads to diversity in service assessments. This diversity makes the service selection a challenging task, especially when numerous qualities of service criteria and range of providers are considered. To address...
With the rapidly growing demand for the cloud services, a need for efficient methods to trade computing resources increases. Commonly used fixed-price model is not always the best approach for trading cloud resources, because of its inflexible and static nature. Market-based trading shows promise for more efficient resource allocation and pricing in the cloud. However, most of the existing mechanisms...
The cloud computing paradigm requires solutions supporting customers in the selection of services that satisfy their functional and non-functional requirements. These solutions must i) support the dynamic, multi-cloud nature of service provisioning, ii) manage scenarios where no total preference relation over service properties is available, and iii) prevent providers from misrepresenting or overstating...
Online Social Network (OSN) services are very popular nowadays. In order to protect the data privacy, Decentralized Online Social Network (DOSN) services have been proposed. In DOSN, the data published by a user and the data replicas are only stored in the friend circle of the user. Although full replication can improve Data Availability (DA), pure DOSNs may not be able to deliver sustainable data...
Scientific workflows have become an important paradigm for domain scientists to formalize and structure complex data-intensive scientific processes. The ever-increasing volumes of scientific data motivate researchers to extend scientific workflow management systems (SWFMSs) to utilize the power of Cloud computing to perform big data analyses. Unlike workflows run in traditional on-premise environments...
Cloud-based services have become a cornerstone of today's IT. The self-service feature inherent in Cloud systems allows customers to play a greater role in service procurement. However, this restricts the value propositions and Service Level Agreements (SLAs) that Cloud providers offer because Quality of Service (QoS) and Non Functional Property (NFP) requirements vary from customer to customer. In...
The crucial role of networking in Cloud computing calls for federated management of both computing and networking resources for end-to-end service provisioning. Application of the Service-Oriented Architecture (SOA) in both Cloud computing and networking enables a convergence of network and Cloud service provisioning. One of the key challenges to network -- Cloud convergence lies in QoS-aware composition...
In a typical web services environment, a web service framework supports the client and server interaction by, among other tasks, announcing the services interfaces and translating application-level service calls to SOAP messages. Although designed to support inter-operation, research and practice suggest that existing client-side and server-side frameworks, many times, cannot fully inter-operate....
Owing to the dynamicity of business environments in which organizations must quickly adapt to changes, the information systems have recently had to adapt to new situations so that they can keep adding value efficiently and effectively. In the light of this scenario, a new discipline called Service-oriented Systems Engineering has emerged in the academic scene and this has highlighted the disciplined,...
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