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作者： Granville, Lisandro Zambenedetti Gaspary, Luciano Paschoal Schulze, Bruno De Souza, José Neuman Brazil Special Interest Group on Computer Networks and Distributed Systems Brazilian Computer Society Brazil Brazilian Laboratory on Computer Networks Brazil IFIP/IEEE im Brazil Graduate Program on Applied Computing Universidade do Vale do Rio dos Sinos Brazil IEEE Communications Society Japan National Lab. for Scientific Computing - LNCC Brazil Brazilian National Research Council CNPq Brazil ACM Brazil IEEE Brazil Brazilian Computing Society Brazil Federal University of Ceará Brazil

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An identity-based security infrastructure for Cloud environments

An identity-based security infrastructure for Cloud environm...

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IEEE International Conference on Wireless Communications, Networking and Information Security (WCNIS)

作者： Christian Schridde Tim Dörnemann Ernst Juhnke Bernd Freisleben Matthew Smith Department of Mathematics and Computer Science University of Marburg Marburg Germany Distributed Computing Security Group University of Hannover Hannover Germany

This paper presents a novel security infrastructure for deploying and using service-oriented Cloud applications securely without having to face the complexity associated with certificate management. The proposal is based on an identity-based cryptographic approach that offers an independent setup of security domains and does not require a trust hierarchy compared to other identity-based cryptographic systems. The service URLs can be used as public keys, such that creating a secure connection to a service is very simple. A comparison between traditional approaches and identity-based cryptography with respect to data transfer requirements is presented.

关键词： Identity-based encryption Cloud computing Grid computing computer security Public key cryptography Application software Proposals Data security Public key Scheduling

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Experimental Assessment of Containers Running on Top of Virtual Machines

arXiv

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arXiv 2024年

作者： Aqasizade, Hossein Ataie, Ehsan Bastam, Mostafa Department of Computer Engineering University of Mazandaran Babolsar Iran Distributed Computing Systems Research Group University of Mazandaran Babolsar Iran

Over the past two decades, the cloud computing paradigm has gradually attracted more popularity due to its efficient resource usage and simple service access model. Virtualization technology is the fundamental element of cloud computing that brings several benefits to cloud users and providers, such as workload isolation, energy efficiency, server consolidation, and cost reduction. This paper examines the combination of operating system-level virtualization (containers) and hardware-level virtualization (virtual machines). To this end, the performance of containers running on top of virtual machines is experimentally compared with standalone virtual machines and containers based on different hardware resources, including the processor, main memory, disk, and network in a real testbed by running the most commonly used benchmarks. Paravirtualization and full virtualization as well as type 1 and type 2 hypervisors are covered in this study. In addition, three prevalent containerization platforms are examined. © 2024, CC BY.

关键词： Virtual machine

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Transaction integration for reusable hard real-time components

Transaction integration for reusable hard real-time componen...

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IEEE International Symposim on High Assurance Systems Engineering

作者： P. Cornwell A. Wellings Distributed Objects Research Group Department of Computing Bournemouth University UK Real-Time Systems Research Group Department of Computer Science University of York UK

The paper presents a strategy for the composition of components to meet 'end to end' timing requirements. This is a framework based approach known as transaction integration. A framework is constructed through the use of transactions. A transaction represents a control and data flow path across a set of component interfaces, or placeholders, that must be completed by a specific deadline. Reusable real time components are 'plugged' into each placeholder. The paper provides techniques to verify that the performance characteristics of each placeholder, and the 'end to end' deadlines associated with each transaction are met.

关键词： Real time systems Object oriented modeling Plugs Sockets distributed computing computer science Timing Weapons Bibliographies Artificial intelligence

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Your best might not be good enough: Ranking in collaborative social search engines

Your best might not be good enough: Ranking in collaborative...

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International Conference on Collaborative computing: Networking, Applications and Worksharing (CollaborateCom)

作者： Prantik Bhattacharyya Jeff Rowe Shyhtsun Felix Wu Karen Haigh Niklas Lavesson Henric Johnson Department of Computer Science University of California Davis Department of Computer Science University of California Davis USA School of Computing Blekinge Institute of Technology Sweden Intelligent Distributed Computing Group BBN Technologies

A relevant feature of online social networks like Facebook is the scope for users to share external information from the web with their friends by sharing an URL. The phenomenon of sharing has bridged the web graph with the social network graph and the shared knowledge in ego networks has become a source for relevant information for an individual user, leading to the emergence of social search as a powerful tool for information retrieval. Consideration of the social context has become an essential factor in the process of ranking results in response to queries in social search engines. In this work, we present InfoSearch, a social search engine built over the Facebook platform, which lets users search for information based on what their friends have shared. We identify and implement three distinct ranking factors based on the number of mutual friends, social group membership, and time stamp of shared documents to rank results for user searches. We perform user studies based on the Facebook feeds of two authors to understand the impact of each ranking factor on the result for two queries.

关键词： Privacy Facebook Irrigation Security

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A Taxonomy of Autonomic Application Management in Grids

A Taxonomy of Autonomic Application Management in Grids

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International Conference on Parallel and distributed Systems (ICPADS)

作者： Mustafizur Rahman Rajiv Ranjan Rajkumar Buyya Cloud Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Service Oriented Computing Research Group School of Computer Science and Engineering University of New South Wales Australia

In this paper, we propose a taxonomy that characterizes and classifies different components of autonomic application management in Grids. We also survey several representative Grid systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the similarities and differences of state-of-the-art technologies utilized in autonomic application management from the perspective of Grid computing, but also identifies the areas that require further research initiatives.

关键词： Monitoring Resource management Taxonomy Processor scheduling Decision making Dynamic scheduling

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A simulation study of IPv6 to ATM flow mapping techniques

A simulation study of IPv6 to ATM flow mapping techniques

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Annual Symposium on Simulation

作者： K. Basu F. Ball D.D. Kouvatsos Distributed Systems Research Group School of Computing and Mathematical Sciences Oxford Brookes University Oxford UK Computer Systems Modelling Research Group University of Bradford Bradford UK

ISBN: (纸本)0769510922

This paper presents a simulation study into the problem of conveying IP packets over an ATM network in cases where quality of service (QoS) is an important consideration. The main focus of the work is on mapping IP packet flows onto ATM cell streams, in particular for the purpose of maintaining the QoS requirements of continuous media (audio and video) traffic. Simulation models of two different flow-mapping scenarios are described, and results of an evaluation of the flow mapping process are presented. These results are also used to validate analytical solutions to the problem, which have been developed in separate work.

关键词： Asynchronous transfer mode Quality of service Telecommunication traffic Traffic control Protocols IP networks Computational modeling Streaming media Web and internet services Switches

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Dependable workflow scheduling in global Grids

Dependable workflow scheduling in global Grids

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International Workshop on Grid computing

作者： Mustafizur Rahman Rajiv Ranjan Rajkumar Buyya Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Service Oriented Computing Research Group School of Computer Science and Engineering University of New South Wales Australia

In this paper, a reputation-based Grid workflow scheduling algorithm is proposed to counter the effect of inherent unreliability and temporal characteristics of computing resources in large scale, decentralized Grid overlays. The proposed approach builds upon structured peer-to-peer indexing and overlay networking techniques to create a scalable wide-area networking of Grid sites for supporting dependable scheduling of applications. The scheduling algorithm considers reliability of a Grid resource as a statistical property, which is globally computed in the decentralized Grid overlay based on dynamic feedbacks or reputation scores assigned by individual service consumers (Grid Resource Brokers). The proposed algorithm can dynamically adapt to changing resource conditions and offer significant performance gains as compared to traditional approaches in the event of unsuccessful job execution or resource failure. We evaluate and demonstrate the feasibility of our approach through an extensive trace driven simulation. The results show that our scheduling technique can reduce the makespan up to 50% and successfully isolate the failure-prone resources from the system.

关键词： Processor scheduling Scheduling algorithm Grid computing Counting circuits Large-scale systems Peer to peer computing Indexing Feedback Heuristic algorithms Performance gain

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A distributed heuristic for decentralized workflow scheduling in global Grids

A distributed heuristic for decentralized workflow schedulin...

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International Workshop on Grid computing

Efficient scheduling is a key concern for the effectual execution of performance driven Grid applications, such as workflows. Many list heuristics have been developed for scheduling workflows in centralized Grid environment. However, in this paper, we present a distributed list heuristic for decentralized scheduling of workflow applications in global Grids. The simulation results show that the proposed scheduling approach is scalable with respect to increased workload on the system.

关键词： Processor scheduling Grid computing Resource management computer science Scheduling algorithm Laboratories Software engineering distributed computing Application software Peer to peer computing

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On-line data archives

On-line data archives

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Annual Hawaii International Conference on System Sciences (HICSS)

作者： K.A. Hawick P.D. Coddington H.A. James C.J. Patten Distributed and High Performance Computing Group Department of Computer Science University of Adelaide Adelaide SA Australia School of Informatics University of Wales Bangor UK

ISBN: (纸本)0769509819

Digital libraries and other large archives of electronically retrievable and manipulable material are becoming widespread in both commercial and scientific arenas. Advances in networking technologies have led to a greater proliferation of wide area distributed data warehousing with associated data management challenges. We review tools and technologies for supporting distributed online data archives and explain our key concept of "active" data archives, in which data can be processed on-demand prior to delivery. We are developing wide-area data warehousing software infrastructure for geographically distributed archives of large scientific data sets, such as satellite image data, that are stored hierarchically on disk arrays and tape silos and are accessed by a variety of scientific and decision support applications. Interoperability is a major issue for distributed data archives and requires standards for server interfaces and metadata. We review present activities and our contributions in developing such standards for different application areas.

关键词： Application software Warehousing Software libraries Satellites Data warehouses High performance computing computer science Informatics Technology management Standards development

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