Página 1 dos resultados de 207 itens digitais encontrados em 0.014 segundos

GreenMACC: an architecture to green metascheduling with quality of service in private clouds

Carvalho Junior, Osvaldo Adilson de; Bruschi, Sarita Mazzini; Santana, Regina Helena Carlucci; Santana, Marcos José
Fonte: Universidad de la República (UdelaR); Universidad Católica del Uruguay; Universidad ORT Uruguay; Universidad de Montevideo; Universidad de la Empresa; Montevideo Publicador: Universidad de la República (UdelaR); Universidad Católica del Uruguay; Universidad ORT Uruguay; Universidad de Montevideo; Universidad de la Empresa; Montevideo
Tipo: Conferência ou Objeto de Conferência
POR
Relevância na Pesquisa
56.18%
This paper aims to propose the GreenMACC, an extension of MACC architecture (Metascheduling Architecture To provide QoS in Cloud Computing) aimed at providing QoS in a structure green computing services in a private cloud . To test the new proposed architecture, this paper presents a performance evaluation of policies of the four stages of scheduling with a focus on energy consumption and the average response time. The GreenMACC architecture was consistent in its operation allowing multiple users to run various services on a large scale private cloud and being able to control the energy consumption and quality of services.

GreenMACC - Uma arquitetura para metaescalonamento verde com provisão de QoS em uma nuvem privada; GreenMACC - an architecture for green metascheduling with QoS provisioning in a private cloud

Carvalho Junior, Osvaldo Adilson de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 15/12/2014 PT
Relevância na Pesquisa
56.33%
Esta tese de Doutorado tem como objetivo apresentar uma arquitetura para metaescalonamento verde com provisão de qualidade de serviço em uma nuvem privada denominada GreenMACC. Essa nova arquitetura oferece a automatização na escolha de políticas em quatro estágios de escalonamento de uma nuvem privada, permitindo cumprir a negociação que foi estabelecida com o usuário. Devido a essa função, é possível garantir que o GreenMACC se comporte seguindo os princípios da computação verde sem deixar de se preocupar com a qualidade do serviço. Nesta tese o GreenMACC é apresentado, detalhado, discutido, validado e avaliado. Com os resultados apresentados pode-se concluir que a arquitetura proposta mostrou-se consistente, permitindo a execução dos serviços requisitados com diversas políticas de escalonamento em todos os seus estágios. Além disso, demonstrou flexibilidade em receber novas políticas, com focos verde e de qualidade de serviço, e eficiência na escolha das políticas de escalonamento de acordo com a negociação feita com o usuário.; This PhD thesis aims to present an architecture for green metascheduling with provision of quality of service in a private cloud called GreenMACC. This new architecture offers the possibility of choosing automatically the four stage scheduling policies of a private cloud...

Estudo sobre o impacto energético de máquinas virtuais em um sistema computacional físico

Salgado, Gustavo Trein
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Trabalho de Conclusão de Curso Formato: application/pdf
POR
Relevância na Pesquisa
46.25%
A utilização eficiente da energia é um assunto interdisciplinar. Na computação, o consumo, anteriormente problema exclusivo de sistemas embarcados e notebooks, está sendo objeto de estudo de todas as plataformas. Desta forma, a Computação Verde está ganhando espaço, diversas ferramentas e técnicas estão sendo propostas para garantir uma melhor utilização dos recursos energéticos em diferentes componentes do computador. Algumas destas técnicas baseiam-se na redução de desperdícios energéticos, outras permitem uma redução no desempenho em prol de uma menor dissipação de potência. A virtualização é uma técnica que traz diversas vantagens para plataformas computacionais. No contexto da computação verde, a virtualização pode aumentar a eficiência energética de sistemas computacionais ao garantir uma utilização mais eficiente dos recursos de hardware. Neste contexto, um estudo é proposto para investigar o consumo energético de máquinas virtuais e para avaliar a influência da redução da frequência de processamento no consumo energético de um desktop.; Power efficiency is an interdisciplinary subject. In computing systems, dissipation, previously an issue of embedded systems and laptops is becoming study subject of all platforms. Thus...

Impacto de plataformas de virtualização no consumo energético : um estudo comparativo entre Xen e KVM; Impact of virtualization platforms on energy consumption: a comparative study between Xen and KVM

Almeida, João Paullo Vieira de
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Trabalho de Conclusão de Curso Formato: application/pdf
POR
Relevância na Pesquisa
46.15%
A significativa elevação na demanda de energia elétrica nas últimas décadas – ocasionada pelo aumento da população mundial e pela adoção de tecnologias que utilizam cada vez mais os recursos energéticos disponíveis – faz com governos e empresas busquem maneiras de melhorar sua eficiência energética, evitando desperdícios e acarretando economia de recursos físicos e, por consequência, de dinheiro. No âmbito da computação, o conceito de Computação Verde traz à tona diversas técnicas que podem ocasionar melhora na eficiência energética das máquinas físicas. Uma dessas estratégias baseia-se na virtualização, a qual faz com que o hardware (máquinas físicas, servidores, etc.) seja mais eficientemente utilizado, levando a uma economia de energia relativa à alimentação dos sistemas que, após a virtualização, poderão ser desativados. Este trabalho apresenta uma análise de duas plataformas de virtualização distintas: Xen e KVM, comparando-as em diferentes fatores tais como desempenho, dissipação de potência e eficiência energética. Será analisado o custo da virtualização para sistemas físicos e o impacto de um sistema virtualizado (com n máquinas virtuais executando simultaneamente), de forma que seja possível confirmar a teoria de que a virtualização pode aumentar a eficiência energética de um sistema computacional.; The significant increase in electricity demand in recent decades – caused by global population growth and the adoption of technologies that are increasingly using the available energy resources – makes governments and companies seeks ways to improve their energy efficiency...

Abordagem híbrida para alocação de máquinas virtuais em nuvens computacionais; Hybrid approach for virtual machines allocation in computational clouds

Lucio Agostinho Rocha
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 18/10/2013 PT
Relevância na Pesquisa
36.24%
A Computação em Nuvem é um modelo para a oferta de serviços sob demanda na Internet. Neste modelo, um provedor de serviço de nuvem oferece serviços de processamento e armazenamento de informação por meio da virtualização de uma infraestrutura computacional, composta de servidores, equipamentos de comunicação, sistemas de armazenamento de dados, aplicativos, dentre outros. Na Computação em Nuvem as máquinas virtuais (VMs) são entidades que permitem o compartilhamento seguro de recursos na nuvem. Visando obter economia de escala, os provedores de serviço operam dezenas de data centers cada qual abrigando milhares de servidores e interconectados por redes de comunicação de alta capacidade. O consumo de energia nesta ampla infraestrutura física é responsável por uma parcela cada vez mais significativa dos custos operacionais das nuvens computacionais, além de contribuírem com a emissão de gases responsáveis pelo efeito estufa. Neste sentido, o processamento de informação em larga escala com baixas emissões de carbono, a chamada Computação Verde, assume um papel importante na Computação em Nuvem. O interesse pela Computação Verde tem motivado o surgimento de várias estratégias de alocação de recursos computacionais (VMs) em data centers com o objetivo de otimizar o consumo de energia na nuvem. Esta tese propõe uma estratégia capaz de otimizar o consumo de energia na infraestrutura de nuvem mantendo níveis de qualidade de serviço (QoS) na rede de comunicação dentro de limites definidos pelo provedor de serviço. Essa estratégia de otimização híbrida combina algoritmos genéticos...

Semantic interrelation in distributed system through green computing ontology

Herlina, Jayadianti; Nugroho, Lukito Edi; Santosa, Paulus Insap; Pinto, Carlos Sousa
Fonte: Universidade do Minho Publicador: Universidade do Minho
Tipo: Conferência ou Objeto de Conferência
Publicado em 26/08/2013 ENG
Relevância na Pesquisa
66.33%
Green computing refers to the system that provides minimal impact on the environment. When we are talking about green computing we discuss about how much energy is used by the system, such as energy used by the system, time used for the search process, and how effective the system is. Related to that issue, trough this paper we want to proposes a new effort to achieve Green Computing in heterogeneous data in distributed system. The technology chosen to deal with them is Ontology. We try to generate a common ontology including a common set of terms, based on the several ontologies available, in order to make possible to share the common terminology (set of terms) that it implements, between different communities. If a very large amount of distributed data is not managed and distributed properly, user will need more time to do a search process. The longer the search is done, the more energy is used.

Evaluation of Energy Systems for Distributed Green Data Centres using Lifetime Cash Flow Analysis

Werden, PAUL
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
36.31%
Distributed Green Data Centres (DGDC) are micro-data centre collocated with renewable energy generation sources. Multiple DGDCs are networked together to share information and computing processes. In this thesis, a year-long DGDC simulation balances the computing demand and supply each hour with variable renewable energy production and electricity prices. A five-year Net Present Value (NPV) analysis determines the optimal energy system with the lowest lifetime cost of computing (LCC), equal to the net present value divided by the amount of electricity used for computing. The LCC fairly compares alternative energy systems by the ability to provide lowest cost computing. Grid-isolated DGDCs with 100kW of solar panels have an optimal computing capacity of 20kW and a 20 hour battery capacity. When the optimal grid-isolated DGDC is connected to the Ithaca electricity grid the battery storage is 10 hours and the LCC is $10/MWh less. The NYSERDA Solar PV Program applied to a grid-tied DGDC reduces the panel cost by $76,806 and reduces the LCC by 8.5%. Grid-tied DGDCs in Ontario are not feasible due to the high Feed-in-Tariff incentive to sell electricity. A grid-isolated DGDC is optimal in Ithaca when the cost of transmission infrastructure upgrades are greater than $8291 or when the value of a generated Renewable Energy Credits (REC) are higher than $38/MWh. Both on- and off-grid DGDCs use equal amount of energy for computing but a grid-tied DGDC is able to sell 26% of electricity from a 100kW solar system with only 10kW of transmission capacity. Grid-tied DGDCs are active market participants responding to electricity price signals. DGDCs buy low-cost electricity and sell electricity when prices are high. On average the cost of energy used by the DGDC is $19/MWh less than grid electricity. DGDCs provide a reliable source of computing for high-priority applications such as video streaming as well as a low-cost option for time independent tasks such as batch processes or cloud storage.; Thesis (Master...

Greening IT : How greener it can form a solid base for a low-carbon society

Fonte: World : The Greening IT Initiative, 2010. Publicador: World : The Greening IT Initiative, 2010.
Tipo: Livro Formato: application/pdf
ENG
Relevância na Pesquisa
36.25%
272 p.; Libro Electrónico; Information Technology is responsible for approximately 2% of the world's emission of greenhouse gases. The IT sector itself contributes to these greenhouse gas emissions, through its massive consumption of energy - and therefore continuously exacerbates the problem. At the same time, however, the IT industry can provide the technological solutions we need to optimise resource use, save energy and reduce greenhouse gas emissions. We call this Greening IT. This book looks into the great potential of greening society with IT - i.e. the potential of IT in transforming our societies into Low-Carbon societies. The book is the result of an internationally collaborative effort by a number of opinion leaders in the field of Greening IT. Tomado de http://www.amazon.com/gp/product/8791936020; The Greening of IT is a symptom of a much larger challenge for humankind - transitioning from economic childhood into maturity. Despite the emergence of large regional alliances such as the EC, humankind remains incredibly fragmented; and yet the need for global climate and energy policies is pressing. IT offers tantalizing technical solutions to our emissions and growth dilemma: it can grow greener and help with the greening of other industries. This book explores this potential.; Acknowledgements; Disclosure; 1 Prologue; 2 Our Tools Will Not Save Us This Time - by Laurent Liscia; 3 Climate Change and the Low Carbon Society - by Irene N. Sobotta; 4 Why Green IT Is Hard - An Economic Perspective - by Rien Dijkstra; 5 Cloud Computing - by Adrian Sobotta; 6 Thin Client Computing - by Sean Whetstone; 7 Smart Grid - by Adrian Sobotta; 8 How IT Contributes to the Greening of the Grid - by Dr. GeorgeW. Arnold; 9 The Green IT Industry Ecosystem - by Ariane Rüdiger; 10 Out of The Box Ways IT Can Help to Preserve Nature and Reduce CO2 - by Flavio Souza; 11 From KPIs to the Business Case - Return on Investment on Green IT? - by Dominique C. Brack; 12 Computing Energy Efficiency - An Introduction - by Bianca Wirth; 13 A Future View: Biomimicry + Technology - by Bianca Wirth; 14 Greening Supply Chains - The Role of Information Technologies - by Hans Moonen; 15 Epilogue; References; Index

Integrated Green Cloud Computing Architecture

Hulkury, M. N.; Doomun, M. R.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 06/12/2012
Relevância na Pesquisa
36.27%
Arbitrary usage of cloud computing, either private or public, can lead to uneconomical energy consumption in data processing, storage and communication. Hence, green cloud computing solutions aim not only to save energy but also reduce operational costs and carbon footprints on the environment. In this paper, an Integrated Green Cloud Architecture (IGCA) is proposed that comprises of a client-oriented Green Cloud Middleware to assist managers in better overseeing and configuring their overall access to cloud services in the greenest or most energy-efficient way. Decision making, whether to use local machine processing, private or public clouds, is smartly handled by the middleware using predefined system specifications such as service level agreement (SLA), Quality of service (QoS), equipment specifications and job description provided by IT department. Analytical model is used to show the feasibility to achieve efficient energy consumption while choosing between local, private and public Cloud service provider (CSP).; Comment: 6 pages, International Conference on Advanced Computer Science Applications and Technologies, ACSAT 2012

Community Cloud Computing

Marinos, Alexandros; Briscoe, Gerard
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
46.1%
Cloud Computing is rising fast, with its data centres growing at an unprecedented rate. However, this has come with concerns over privacy, efficiency at the expense of resilience, and environmental sustainability, because of the dependence on Cloud vendors such as Google, Amazon and Microsoft. Our response is an alternative model for the Cloud conceptualisation, providing a paradigm for Clouds in the community, utilising networked personal computers for liberation from the centralised vendor model. Community Cloud Computing (C3) offers an alternative architecture, created by combing the Cloud with paradigms from Grid Computing, principles from Digital Ecosystems, and sustainability from Green Computing, while remaining true to the original vision of the Internet. It is more technically challenging than Cloud Computing, having to deal with distributed computing issues, including heterogeneous nodes, varying quality of service, and additional security constraints. However, these are not insurmountable challenges, and with the need to retain control over our digital lives and the potential environmental consequences, it is a challenge we must pursue.; Comment: 11 Pages, 5 figures

MOMCC: Market-Oriented Architecture for Mobile Cloud Computing Based on Service Oriented Architecture

Abolfazli, Saeid; Sanaei, Zohreh; Gani, Abdullah; Shiraz, Muhammad
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 27/06/2012
Relevância na Pesquisa
36.13%
The vision of augmenting computing capabilities of mobile devices, especially smartphones with least cost is likely transforming to reality leveraging cloud computing. Cloud exploitation by mobile devices breeds a new research domain called Mobile Cloud Computing (MCC). However, issues like portability and interoperability should be addressed for mobile augmentation which is a non-trivial task using component-based approaches. Service Oriented Architecture (SOA) is a promising design philosophy embraced by mobile computing and cloud computing communities to stimulate portable, complex application using prefabricated building blocks called Services. Utilizing distant cloud resources to host and run Services is hampered by long WAN latency. Exploiting mobile devices in vicinity alleviates long WAN latency, while creates new set of issues like Service publishing and discovery as well as client-server security, reliability, and Service availability. In this paper, we propose a market-oriented architecture based on SOA to stimulate publishing, discovering, and hosting Services on nearby mobiles, which reduces long WAN latency and creates a business opportunity that encourages mobile owners to embrace Service hosting. Group of mobile phones simulate a nearby cloud computing platform. We create new role of \textit{Service host} by enabling unskilled mobile owners/users to host Services developed by skilled developers. Evidently...

The green grid saga - a green initiative to data centers: a review

Ray, Partha Pratim
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 02/08/2012
Relevância na Pesquisa
46.22%
Information Technology (IT) significantly impacts the environment throughout its life cycle. Most enterprises have not paid enough attention to this until recently. IT's environmental impact can be significantly reduced by behavioral changes, as well as technology changes. Given the relative energy and materials inefficiency of most IT infrastructures today, many green IT initiatives can be easily tackled at no incremental cost. The Green Grid - a non-profit trade organization of IT professionals is such an initiative, formed to initiate the issues of power and cooling in data centers, scattered world-wide. The Green Grid seeks to define best practices for optimizing the efficient consumption of power at IT equipment and facility levels, as well as the manner in which cooling is delivered at these levels hence, providing promising attitude in bringing down the environmental hazards, as well as proceeding to the new era of green computing. In this paper we review the various analytical aspects of The Green Grid upon the data centers and found green facts.; Comment: ISSN 0976-5166

Energy-Efficient Management of Data Center Resources for Cloud Computing: A Vision, Architectural Elements, and Open Challenges

Buyya, Rajkumar; Beloglazov, Anton; Abawajy, Jemal
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 02/06/2010
Relevância na Pesquisa
36.07%
Cloud computing is offering utility-oriented IT services to users worldwide. Based on a pay-as-you-go model, it enables hosting of pervasive applications from consumer, scientific, and business domains. However, data centers hosting Cloud applications consume huge amounts of energy, contributing to high operational costs and carbon footprints to the environment. Therefore, we need Green Cloud computing solutions that can not only save energy for the environment but also reduce operational costs. This paper presents vision, challenges, and architectural elements for energy-efficient management of Cloud computing environments. We focus on the development of dynamic resource provisioning and allocation algorithms that consider the synergy between various data center infrastructures (i.e., the hardware, power units, cooling and software), and holistically work to boost data center energy efficiency and performance. In particular, this paper proposes (a) architectural principles for energy-efficient management of Clouds; (b) energy-efficient resource allocation policies and scheduling algorithms considering quality-of-service expectations, and devices power usage characteristics; and (c) a novel software technology for energy-efficient management of Clouds. We have validated our approach by conducting a set of rigorous performance evaluation study using the CloudSim toolkit. The results demonstrate that Cloud computing model has immense potential as it offers significant performance gains as regards to response time and cost saving under dynamic workload scenarios.; Comment: 12 pages...

Green Computing In Developed And Developing Countries

Taruna, S; Singh, Pratibha; Joshi, Soshya
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 11/06/2014
Relevância na Pesquisa
46.35%
Today e-waste are becoming a major problem for the developing countries. E-waste is defined something as a discarded parts of electronic devices which contains most of the times, hazardous chemicals which is deadly for our environment, example is computer components. Green Computing is the study and practice of designing, using, disposing and manufacturing electronic components in an eco-friendly manner and Green Computing is one of the solution to tackle with this hazardous e-waste problem which is an emerging concern towards the environment. The objective of this paper is to draw the attention towards the lack of awareness about green computing or we can say how green computing policies is being ignored by developing countries and how developed countries are adopting green IT policies seriously. This paper also discusses the analysis which has been done on how the amount of e-waste has been increased in developing countries in past years

Green Energy Aware Avatar Migration Strategy in Green Cloudlet Networks

Sun, Xiang; Ansari, Nirwan; Fan, Qiang
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 11/09/2015
Relevância na Pesquisa
36.23%
We propose a Green Cloudlet Network (\emph{GCN}) architecture to provide seamless Mobile Cloud Computing (\emph{MCC}) services to User Equipments (\emph{UE}s) with low latency in which each cloudlet is powered by both green and brown energy. Fully utilizing green energy can significantly reduce the operational cost of cloudlet providers. However, owing to the spatial dynamics of energy demand and green energy generation, the energy gap among different cloudlets in the network is unbalanced, i.e., some cloudlets' energy demands can be fully provided by green energy but others need to utilize on-grid energy (i.e., brown energy) to satisfy their energy demands. We propose a Green-energy awarE Avatar migRation (\emph{GEAR}) strategy to minimize the on-grid energy consumption in GCN by redistributing the energy demands via Avatar migration among cloudlets according to cloudlets' green energy generation. Furthermore, GEAR ensures the Service Level Agreement (\emph{SLA}) in terms of the maximum Avatar propagation delay by avoiding Avatars hosted in the remote cloudlets. We formulate the GEAR strategy as a mixed integer linear programming problem, which is NP-hard, and thus apply the Branch and Bound search to find its sub-optimal solution. Simulation results demonstrate that GEAR can save on-grid energy consumption significantly as compared to the Follow me AvataR (\emph{FAR}) migration strategy...

Cloudbus Toolkit for Market-Oriented Cloud Computing

Buyya, Rajkumar; Pandey, Suraj; Vecchiola, Christian
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 11/10/2009
Relevância na Pesquisa
36.09%
This keynote paper: (1) presents the 21st century vision of computing and identifies various IT paradigms promising to deliver computing as a utility; (2) defines the architecture for creating market-oriented Clouds and computing atmosphere by leveraging technologies such as virtual machines; (3) provides thoughts on market-based resource management strategies that encompass both customer-driven service management and computational risk management to sustain SLA-oriented resource allocation; (4) presents the work carried out as part of our new Cloud Computing initiative, called Cloudbus: (i) Aneka, a Platform as a Service software system containing SDK (Software Development Kit) for construction of Cloud applications and deployment on private or public Clouds, in addition to supporting market-oriented resource management; (ii) internetworking of Clouds for dynamic creation of federated computing environments for scaling of elastic applications; (iii) creation of 3rd party Cloud brokering services for building content delivery networks and e-Science applications and their deployment on capabilities of IaaS providers such as Amazon along with Grid mashups; (iv) CloudSim supporting modelling and simulation of Clouds for performance studies; (v) Energy Efficient Resource Allocation Mechanisms and Techniques for creation and management of Green Clouds; and (vi) pathways for future research.; Comment: 21 pages...

Computing laboratory sustainability & utilization: initiatives for a greener education

Stokes, Kristian
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado
EN_US
Relevância na Pesquisa
36.1%
Environmental, social and economic sustainability has been a recent focus of academia and industry to further invest in the future and lower operating costs. In this thesis, various emerging techniques are applied in an academic laboratory environment to record, analyze and project green IT initiatives. Student utilization metrics are evaluated to observe typical computing operation during a normal academic quarter. CPU load, network usage, power consumption, and room temperature are analyzed. Sustainable power and virtualization practices are recommended based on projections and assessments of current and recommended configurations. The findings of this study can be used across an academic environment to further reduce energy usage and meet the objectives of the Institute's goals towards a green and sustainable environment.

Multitier portal architecture for thin- and thick-client neutron scattering experiment support

Green, Mark; Miller, Stephen
Fonte: Grid Computing Environments (GCE) Publicador: Grid Computing Environments (GCE)
Tipo: Proceedings
EN_US
Relevância na Pesquisa
46.01%
Integration of emerging technologies and design patterns into the three-tier client-server architecture is required in order to provide a scalable and flexible architecture for novice to sophisticated portal user groups. The ability to provide user customizable portal interfaces is rapidly becoming commonplace and is driving the expectations of researchers and scientists in the scientific community. This paper describes an architectural design that maximizes information technology service reuse while providing a customizable user interface that scales with user sophistication and requirements. The Spallation Neutron Source (SNS) located at Oak Ridge National Laboratory provides a state-of-the-art facility ideal for implementation of this infrastructure. The SNS Java-based Science Portal (Tier I) and Open Grid Computing Environment (Tier II) provide thin-client support whereas the GumTree Eclipse Rich Client Platform (Tier III) and Eclipse Integrated Development Environment (Tier IV) provide thickclient support within a multitier portal architecture. Each tier incorporates all of the features of the previous tiers while adding new capabilities based on the user requirements.; "Multitier portal architecture for thin- and thick-client neutron scattering experiment support...

Community cloud computing

Briscoe, Gerard; Marinos, Alexandros
Fonte: London School of Economics and Political Science Research Publicador: London School of Economics and Political Science Research
Tipo: Conference or Workshop Item; PeerReviewed Formato: application/pdf
Publicado em //2009 EN; EN
Relevância na Pesquisa
36.09%
Cloud Computing is rising fast, with its data centres growing at an unprecedented rate. However, this has come with concerns over privacy, efficiency at the expense of resilience, and environmental sus- tainability, because of the dependence on Cloud vendors such as Google, Amazon and Microsoft. Our response is an alternative model for the Cloud conceptualisation, providing a paradigm for Clouds in the com- munity, utilising networked personal computers for liberation from the centralised vendor model. Community Cloud Computing (C3) offers an alternative architecture, created by combing the Cloud with paradigms from Grid Computing, principles from Digital Ecosystems, and sustainability from Green Computing, while remaining true to the original vision of the Internet. It is more technically challenging than Cloud Computing, having to deal with distributed computing issues, including heterogeneous nodes, varying quality of service, and additional security constraints. However, these are not insurmountable challenges, and with the need to retain control over our digital lives and the potential environmental consequences, it is a challenge we must pursue.

Green Metascheduler Architecture to Provide QoS in Cloud Computing

Adilson de Carvalho Junior,Osvaldo; Mazzini Bruschi,Sarita; Santana,Marcos José
Fonte: CLEI Electronic Journal Publicador: CLEI Electronic Journal
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2015 EN
Relevância na Pesquisa
46.25%
The aim of this paper is to propose and evaluate GreenMACC (Green Metascheduler Architecture to Provide QoS in Cloud Computing), an extension of the MACC architecture (Metascheduler Architecture to provide QoS in Cloud Computing) which uses greenIT techniques to provide Quality of Service. The paper provides an evaluation of the performance of the policies in the four stages of scheduling focused on energy consumption and average response time. The results presented confirm the consistency of the proposal as it controls energy consumption and the quality of services requested by different users of a large-scale private cloud.