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Critical services in the field of Network Function Virtualization require elaborate reliability and high availability mechanisms to meet the high service quality requirements. Traditional monitoring systems detect overload situations and outages in order to automatically scale out services or mask faults. However, faults are often preceded by anomalies and subtle misbehaviors of the services, which...
Cloud computing with massive parallel executionengines is a common method to handle big data. But cloudcomputing and the characteristics of the data (semi structured, from different sources, probably cluttered) cause the developmentand execution of data processing jobs to be failure prone. Thisasks for processing engines to be fault tolerant. This paper introduces an approach to skip faulty or alreadyprocessed...
The IEEE Intercloud project aims to facilitate intercloud interoperability and portability. While topology elements and basic security and trust models had been developed during the last years, an adequate base protocol for the intercloud communication is still required. This protocol have to be extensible and should eliminate limitations of HTTP. This paper proposes a novel protocol that addresses...
Caused by the proliferation of the (IoT) and its related application domains such as Building Automation or E-Health, users face a continuously increasing amount of heterogeneous sensors and devices deployed to their environment. As a result, a large variety of protocols, data formats and physical sensing resources needs to be managed in order to gain benefit from the deployed devices. This raises...
This paper introduces a Software Defined Networking based cloud federation approach, which enables a horizontal network federation between different cloud providers, based on a federated Software Defined Networking (SDN) layer. Thus, a new cloud federation agent is introduced, designed, and exemplary evaluated. The described agent is managing the set up and sustainment of a Software Defined Network...
Since the cloud paradigm becomes increasingly popular for dynamic resources allocation, the flexibility of a cloud is still limited regarding network services and their autonomous federation between different providers. The following architectural approach introduces a generic layered model to orchestrate and federate heterogeneous networks. In particular, an architecture is presented that enables...
Software Defined Networking decouples network services from the underlying physical hardware, thus agile and secure networks can be build, moved, replaced, and programmatically provided on demand. However, the full range of Software Defined Networking capabilities is not utilized in today's cloud middle wares, especially dynamic Quality of Service enforcement for cloud networks. In this paper we combine...
The pervasiveness of connected embedded devices and Internet of Things (IoT) related application domains like smart cities, e-Health or, transportation lead to an constantly increasing amount of data, compute- and storage resources surrounding us. However, currently there is a gap between data acquisition and processing, usually bridged by gateway based approaches that integrate the devices and forward...
SaaS applications often face a vendor or technical lock-in due to PaaS provider specific specifications, like cloud management APIs. As a solution, this paper presents a novel approach for developing applications more PaaS provider independent. In particular, the approach illustrates advantages of extending JavaEE application servers with a new container that executes so called Infrastructure Java...
Cloud computing has already been adopted in a broad range of application domains and has become an established building block in IT landscapes. During the process of cloud middleware development, the companies have focused mainly on the high availability of data and end-user services, but unfortunately neglected the availability of middleware components. Therefore failures of the middleware components...
Infrastructure as a Service clouds often use virtual machines to host different customers on the same physical hardware. This form of resource sharing can lead to unpredicatable performance degradations for the individual customer, especially with regard to data-intensive applications, which heavily depend on stable I/O characteristics. One traditional approach to cope with I/O fluctuations is adaptive...
Cloud computing has already been adopted in a broad range of application domains. However, domains like the distributed development of embedded systems are still unable to benefit from the advancements of cloud computing. Besides general security concerns, a common obstacle often is the incompatibility between such applications and the cloud. In particular, if applications need direct access to hardware...
Cloud Computing is becoming increasingly established and offers several opportunities to obtain IT services in an on-demand manner. Especially infrastructure services, like storage and scalable computing resources, are gaining relevance and provide alternatives to conventional sourcing models. Despite the Cloud paradigm of flexible and limitless scalability the lack of standardization presents a big...
The ongoing integration of renewable energy sources is likely to increase the fluctuations in the ratio of produced and consumed power. Several types of Demand Response (DR) programs have been proposed to deal with the increasing volatility of power production and consumption. Many of these, such as Real Time Pricing (RTP), require intensive monitoring of the consumers' power consumption. This is...
Modern Infrastructure-as-a-Service (IaaS) clouds offer an unprecedented flexibility and elasticity in terms of resource provisioning through the use of hardware virtualization. However, for the cloud customer, this virtualization also introduces an opaqueness which imposes serious obstacles for data-intensive distributed applications. In particular, the lack of network topology information, i.e. information...
Infrastructure as a Service (IaaS) clouds are gaining increasing popularity as a platform for distributed computations. The virtualization layers of those clouds offer new possibilities for rapid resource provisioning, but also hide aspects of the underlying IT infrastructure which have often been exploited in classic cluster environments. One of those hidden aspects is the network topology, i.e....
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