11 documents found, page 1 of 2
Square Kilometre Array Science Data Challenge 1: analysis and results
Bonaldi, A.; T. An; Bruggen, M.; Burkutean, S.; Coelho, B.; Goodarzi, H.; Hartley, P.; Sandhu, P. K.; Wu, C.; L. Yu; Haghighi, M. H. ZhoolidehAs the largest radio telescope in the world, the Square Kilometre Array (SKA) will lead the next generation of radio astronomy. The feats of engineering required to construct the telescope array will be matched only by the techniques developed to exploit the rich scientific value of the data. To drive forward the development of efficient and accurate analysis methods, we are designing a series of data challenge...
Very large scale high performance computing and instrument management for high ...
Morgado, J. B.; Maia, D.; Barbosa, D.; Barraca, J. P.; Bergano, J.; Bartashevich, D.; Silva, Nuno; Di Carlo, M.; Canzari, M.; Dolci, M.; Smareglia, R.The Square Kilometer Array (SKA) Telescope, is an ongoing project set to start its building phase in 2018 and be ready for first light in 2020. The first part of the project, the SKA1 will be comprised of 130.000 low frequency antennas (50 MHz to 350 MHz) and 200 mid frequency antennas (350 MHz to 15.5 GHz). The SKA1 will produce a raw data rate of ~10 Tb/s, require a computing power of 100 Pflop/s and an archi...
HARD: Hybrid Adaptive Resource Discovery for Jungle Computing
Zarrin, J; Aguiar, R. L.; Barraca, J. P.In recent years, Jungle Computing has emerged as a distributed computing paradigm based on simultaneous combination of various hierarchical and distributed computing environments which are composed by large number of heterogeneous resources. In such a computing environment, the resources and the underlying computation and communication infrastructures are highly-hierarchical and heterogeneous. This creates a lo...
A Survey on Cooperative MAC Protocols in IEEE 802.11 Wireless Networks
Sadeghi, R.; Barraca, J. P.; Aguiar, R. L.The concept of cooperative communication appears as a beneficial method that can address key challenges faced by wireless networks. Cooperative techniques in IEEE 802.11 MAC protocols have thus received significant attention both in theoretical and practical aspects. In this survey article, we provide an overview of existing research on cooperative MAC protocols in the IEEE 802.11 standard. We specially focus o...
Manycore simulation for peta-scale system design: Motivation, tools, challenges...
Zarrin, J; Aguiar, R. L.; Barraca, J. P.The architecture design of peta-scale computing systems is complex and presents lots of difficulties to designs, as current tools lack support for relevant features of future scenarios. Novel systems must be designed with great care and tools, such as manycore architecture simulators, must be adapted accordingly. However, current simulation tools are very slow, often specific-purpose-oriented, suffer from vario...
Seamless integration of cloud and fog networks
Cardoso, I. D.; Barraca, J. P.; Goncalves, C.; Aguiar, R. L.A way to merge cloud computing infrastructures with traditional or legacy network deployments, leveraging the best in both worlds and enabling a logically centralized control. A solution is proposed to extend existing cloud computing software stacks so they are able to manage networks outside the cloud computing infrastructure, the fog, by extending the internal, virtualized network segments. This is useful in ...
ElCore: Dynamic elastic resource management and discovery for future large-scal...
Zarrin, J.; Aguiar, R. L.; Barraca, J. P.Large-scale computing environments (such as HPC Clusters, Grids and Clouds) provide a vast number of heterogeneous resources (such as computing, storage, data and network resources) for the users/machines with various types of accessibility (in terms of resource, data, service and application). Resource management is one of the most significant underlying challenges for efficient resource sharing and utilizatio...
A Cyber Infrastructure for the SKA Telescope Manager
Barbosa, D; Barraca, J. P.; Carvalho, B.; Maia, D.; Gupta, Y.; Natarajan, S.; Le Roux, G.; Swart, P.The Square Kilometre Array Telescope Manager (SKA TM) will be responsible for assisting the SKA Operations and Observation Management, carrying out System diagnosis and collecting Monitoring & Control data from the SKA subsystems and components. To provide adequate compute resources, scalability, operation continuity and high availability, as well as strict Quality of Service, the TM cyber-infrastructure (embod...
Power Monitoring and Control for Large Scale projects: SKA, a case study
Barbosa, D; Barraca, J. P.; Maia, D.; Carvalho, B.; Vieira, J.; Swart, P.; Le Roux, G.; Natarajan, S.; van Ardenne, A.; Seca, L.Large sensor-based science infrastructures for radio astronomy like the SKA will be among the most intensive data driven projects in the world, facing very high demanding computation, storage, management, and above all power demands The geographically wide distribution of the SKA and and its associated processing requirements in the form of tailored High Performance Computing (HPC) facilities, require a Greener...
Toward a telco cloud environment for service functions
Soares, J.; Gonçalves, C.; Parreira, B.; Tavares, P.; Carapinha, J.; Barraca, J. P.; Aguiar, R. L.; Sargento, S.Deploying service functions, SFs, is an essential action for a network provider. However, the action of creating, modifying and removing network SFs is traditionally very costly in time and effort, requiring the acquisition and placement of specialized hardware devices and their interconnection. Fortunately, the emergence of concepts like cloud computing, SDN, and ultimately NFV is expected to raise new possibi...