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Service identification meets with new challenges with overwhelming rise of categories and numbers of services in big data scenarios. Most of the current service identification approaches have paid little attention to the granularity of indicator for service identification, neither do they provide with any trustworthy monitoring mechanism during the process of service identification. To address the...
Cloud Computing, as a distributed computingparadigm, consists in provisioning infrastructure, software, andplatform resources as services. This paradigm is being increasinglyused for the deployment and execution of servicebasedapplications. To efficiently manage them according to theautonomic computing paradigm, service-based applications canbe associated with autonomic manager (AM) components thatmonitor,...
This paper presents results of the ongoing development of CYCLONE as a platform for scientific applications in heterogeneous multi-cloud/multi-provider environment. In particular, we focus on QoS management of the multi-cloud applications within CYCLONE. A challenging factor for application deployment and exploitation within the CYCLONE infrastructure is its highly dynamic nature, which raises the...
The trend towards more and more efficient computing resources, yet preserving quality of service, is particularly relevant in datacenters and in cloud infrastructures, where a rigorous and adequate management of resources is performed. Resource monitoring, optimization criteria, adaptive mechanisms are being intensively studied from constantly improving efficiency and reducing the environmental impact...
DDS(Data Distribution Service) defines various types of QoS(Quality of Service) policy. By setting these QoS policies appropriately, various communication capabilities can be provided. However, it is difficult to find optimal QoS combination and their values for a certain system or service amongst many combinations. This study proposes a mechanism to identify a suitable QoS combination for a specific...
Virtual machine (VM) management in cloud data center is an important problem that remains to be effectively addressed. There has been a considerable amount of work investigating the management of physical-to-virtual resource mappings to improve the efficiencies of resource usage and power consumption in data center. However, these different management objectives are conflicting. One solution can't...
Web services composition consists of combining web services features in order to respond to complex requests. Giving the large and exponentially growing number of web services offering similar features, services selection should be QoS-driven. Besides, the composition should also support and adapt to dynamic changes occurring during the composite service execution. In this context, this paper proposes...
In spite of their rapid growth, cloud applications still heavily rely on the network communication infrastructure, whose stability and latency directly affect the quality of experience. In fact, as mobile devices need to rapidly get real-time information and files from the cloud, it becomes an extremely important factor for cloud providers to deliver a better user experience. In this paper, we specify...
Mobile-health (m-health) systems leverage wireless and mobile communication technologies to promote new ways to acquire, process, transport, and secure the raw and processed medical data to provide the scalability needed to cope with the increasing number of elderly and chronic disease patients requiring constant monitoring. However, the design and operation of such health monitoring systems with...
Rampant dynamism due to load fluctuations, co runner changes, and varying levels of interference poses a threat to application quality of service (QoS) and has limited our ability to allow co-locations in modern warehouse scale computers (WSCs). Instruction set features such as the non-temporal memory access hints found in modern ISAs (both ARM and x86) may be useful in mitigating these effects. However,...
The composition of services in the web of objects poses important challenges concerning resources limitation, adaptability, performance and scalability. In this paper, we focus on the optimization of service selection as the key operation in dynamic service composition by using multi-agent architecture that achieves an online generation and rescheduling of the optimal services execution workflow by...
The use of Wireless Sensor Networks (WSNs) to monitor and control power utility assets in the smart grid is gaining increasing popularity due to their various desirable features. WSNs with multihop cluster tree topologies solve the limited coverage problem of sensor nodes. However, in smart grid monitoring applications, data rates could increase suddenly due to the occurrence of critical faults in...
Energy efficiency and CO2 awareness are globally-important issues in cloud computing. With increasing attention being paid to the environmental impact of cloud computing there are concerns about the sustainability of cloud computing model as its uptake increases. In this respect, we consider it useful to provide a snapshot of the requirements for energy efficient and CO2 aware cloud computing to allow...
Wireless Sensor Networks (WSNs) are emerging as promising tools to aid in monitoring the smart grid. WSNs can be easily deployed in a wide number of smart grid assets such as substations, overhead power lines and power generation sites. They offer ubiquity and flexibility at a low-cost. However it may be difficult to offer the Quality of Service (QoS) demanded by the smart grid applications with WSNs...
Applications consisting of messaging, voice, and video are used to provide situational awareness to decision makers and emergency responders in high criticality crisis scenarios such as disaster management. Here, ad hoc wireless networks are often quickly provisioned to provide the necessary connectivity to support these applications. Applications ill prepared to deal with the constant fluctuation...
Cloud Operators, in order to respond effectively to the QoS requirements of cloud applications, are obliged to apply over-provisioning policies. In general, this tactic leads to severe waste of the available cloud computing resources. Similarly, both Service/Platform Providers and End-Users wish to avoid the extra cost of this over-provisioning tactic and pay only per use, without having to statically...
Providers of composite Web services face the challenge of having to comply to SLAs, which are agreements governing the minimum performance that customers can expect from a composite service. In this work, a framework for optimizing adaptations of service compositions with regards to SLA violations has been developed. The framework, dubbed PREvent (Prediction and Prevention of SLA Violations Based...
A recent trend in smart camera networks is that they are able to modify the functionality during runtime to better reflect changes in the observed scenes and in the specified monitoring tasks. In this paper we focus on different configuration methods for such networks. A configuration is given by three components: (i) a description of the camera nodes, (ii) a specification of the area of interest...
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...
Service-oriented architecture (SOA) requires fault-tolerant implementation because the heterogeneous nature of services is likely to cause faults and failures. Focusing on the runtime re-composition and exception handling strategies for execution faults, we propose a recovery model in SOA using a Markov decision process (MDP). Various ¡®quality of service' (QoS) criteria and possible recovery strategies...
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