Author: "Pascale Vicat" / Topic: business - Searchworks@Jio Institute Digital Library Search Results

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1. Preclinical in vitro and in vivo pharmacokinetic properties of danicamtiv, a new targeted myosin activator for the treatment of dilated cardiomyopathy

Author: Mark P. Grillo, Svetlana Markova, Marc Evanchik, Marc Trellu, Patricia Moliner, Priscilla Brun, Anne Perreard-Dumaine, Pascale Vicat, Chun Yang, James P. Driscoll, and Tim J. Carlson
Subjects: medicine.medical_specialty, Health, Toxicology and Mutagenesis, Toxicology, Left ventricular enlargement, 030226 pharmacology & pharmacy, Biochemistry, 03 medical and health sciences, 0302 clinical medicine, Pharmacokinetics, In vivo, Internal medicine, Myosin, medicine, cardiovascular diseases, Pharmacology, business.industry, Activator (genetics), Dilated cardiomyopathy, General Medicine, medicine.disease, In vitro, 030220 oncology & carcinogenesis, Heart failure, cardiovascular system, Cardiology, business
Abstract: Dilated cardiomyopathy (DCM) is a disease of the myocardium defined by left ventricular enlargement and systolic dysfunction leading to heart failure. Danicamtiv, a new targeted myosin activator de...
Published: 2020

2. Use of the pentagastrin dog model to explore the food effects on formulations in early drug development

Author: D. MacGerorge, P. Zane, Céline Ollier, Z. Guo, and Pascale Vicat
Subjects: Male, Administration, Oral, Pharmaceutical Science, Pharmacology, Beagle, Gastric Acid, Food-Drug Interactions, Dogs, Species Specificity, Pharmacokinetics, In vivo, Animals, Humans, Medicine, Gastrin, business.industry, Stomach, digestive, oral, and skin physiology, Reproducibility of Results, Fasting, Hydrogen-Ion Concentration, Pentagastrin, medicine.anatomical_structure, Gastric Emptying, Pharmaceutical Preparations, Drug development, Gastric Mucosa, Area Under Curve, Models, Animal, Gastric acid, business, medicine.drug
Abstract: The ability to extrapolate dosage performance from in vitro to in vivo situations has an important role in early drug development. In parallel, the Beagle dog has come to represent a useful animal model for extrapolation to humans especially when drugs formulated for humans are to be tested. In this article, the pentagastrin-induced Beagle dog model was validated internally to show that in the colony the dogs were generally responsive to known doses of pentagastrin that produces effects similar to gastrin in the stomach, i.e., increasing gastric acid production and lowering gastric pH. The effect was observed with a short time course, maximum pH lowering was observed between 0.5 and 1h with return to baseline at 2-4h. The dog stomach pH is a better representative of the human fasted stomach with this pretreatment. The ultimate goal was to use these animals in a food effect studies to predict the behavior of formulations in humans. The results for 4 compounds were provided in the dog and a clear relationship between the effect of food in the dog and the effect of food in humans was observed. While the directionality (positive or negative) of the effect could be adequately predicted, the extent of the effect could not be predicted for all the tested formulations of the 4 compounds. The data will be used to generate a database of known compounds from which a correlation can be drawn to make future predictions using the pentagastrin dog model.
Published: 2014

3. Combining explicit admission control and congestion control for predictable data transfers in grids

Author: Kashif Munir, Marcelo Pasin, Pascale Vicat‐Blanc, and Michael Welzl
Subjects: Computer Networks and Communications, business.industry, Computer science, Quality of service, Distributed computing, Volume (computing), Admission control, Grid, Network congestion, Hardware and Architecture, Bandwidth (computing), Heuristics, business, Software, Computer network
Abstract: To improve the Grid infrastructure's efficiency, the co-reservation of distributed resources is often required. Therefore, Grid applications need to move large amounts of data between these resources within deterministic time frames. In most cases it is possible to specify the volume and the deadline in advance. This paper proposes an approach for data-movement management and bandwidth reservation in Grid, which provides a high acceptance probability of flows in the network while maintaining efficient network-resource utilization. To achieve this, our proposal combines explicit admission control and high-speed transport protocols to enable an opportunistic sharing of the capacity by flows having heterogeneous bandwidth and delay requirements. We formulate the problem and discuss several objective functions. Then we present different heuristics and evaluate them according to the request's acceptance rate and the network's utilization metrics. Our simulations include all the communication and computation overheads which are involved in such data transfers.
Published: 2012

4. Towards market-oriented Clouds

Author: Dimitra Simeonidou, Maurice Gagnaire, Pascale Vicat-Blanc Primet, Réseaux, Mobilité et Services (RMS), Laboratoire Traitement et Communication de l'Information (LTCI), Institut Mines-Télécom [Paris] (IMT)-Télécom Paris-Institut Mines-Télécom [Paris] (IMT)-Télécom Paris, Département Informatique et Réseaux (INFRES), Télécom ParisTech, and HAL, TelecomParis
Subjects: business.product_category, Computer science, Cloud computing, 02 engineering and technology, computer.software_genre, 01 natural sciences, Type of service, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0202 electrical engineering, electronic engineering, information engineering, Internet access, auctions, Grid, Electrical and Electronic Engineering, ComputingMilieux_MISCELLANEOUS, Service (business), [INFO.INFO-NI] Computer Science [cs]/Networking and Internet Architecture [cs.NI], 9. Industry and infrastructure, business.industry, 010401 analytical chemistry, 020206 networking & telecommunications, Provisioning, Supercomputer, 0104 chemical sciences, Grid computing, Pricing strategies, business, Telecommunications, Cloud, computer
Abstract: In the literature, Cloud computing is seen as an evolution of Grid computing, which itself is an evolution of distributed computing and supercomputing. The distinction between the Grid and Cloud concepts is not clearly defined, both of them referring to an externalization of the private data centres. Two main advantages are expected from these two approaches. Instead of investing in the installation and management of its own computing infrastructure, an enterprise may benefit from shared computing resources managed on a remote site by a third party. This third party is known as the Grid/Cloud service provider (GSP or CSP, respectively). This means that both capital expenditures and operational expenditures of the enterprise may be considerably reduced against a moderate increase in service expenditure. In the years 1990s, Grid computing was mainly developed in the perspective to provide affordable high-performance computing to small and medium enterprises. Circa 2000, Cloud Computing has been introduced by the service sector with the objective to extend the externalization of hardware resources to software resources. This distinction added to the fact that in 20 years, not only professionals but also residential users benefit from highspeed Internet access are at the origin of the Cloud computing concept. The economical models of Grid computing and of Cloud computing are quite different. Cloud computing enables the externalization of software resources at a very large scale for residential users; whereas; Grid computing mainly refers to the provisioning of externalized large computing facilities for professionals. Today, both types of services are accessible via simple Web portals. This evolution has motivated the emergence of numerous start-ups and companies specialized in service provisioning with an expected market size by 2011 around $95 billion in business and productivity applications (email, office, CRM, etc.) according to Merrill Lynch analysts. The fields of application of Cloud computing seems almost unlimited, all the sectors of our economy being concerned. Applications are ranging from distant medical diagnostic, collaborative image processing, scientific computation, financial operations, and industrial processes to radio astronomy already financially benefiting from advantages of Clouds or Grids. Two other criteria are also to be considered to distinguish between Grid and Cloud services. The consumers of Cloud services being in majority residential users, the mode of payment of the consumers is carried out on-the-fly with a duration-based charging. The consumers of Grid services being in majority enterprises, their first requirement is rather the availability of the computing resources than the price of the service itself. Resources are in that case reserved in advance for a longer period of time than in the case of Cloud services. A last distinction may be done between Grids and Clouds. In the case of Grids, heterogeneous computing resources managed by different entities may have to interoperate to provide the required service. This is not the case in the context of Clouds where comparatively, a smaller computing power is requested for a given service. Homogeneous hardware M. Gagnaire (*) Institut Telecom/Telecom ParisTech, Paris, France e-mail: gagnaire@telecom-paristech.fr
Published: 2010

5. Joint Elastic Cloud and Virtual Network Framework for Application Performance-cost Optimization

Author: Tram Truong Huu, Fabienne Anhalt, Johan Montagnat, Guilherme Piêgas Koslovski, Pascale Vicat-Blanc Primet, Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe MODALIS, Scalable and Pervasive softwARe and Knowledge Systems (Laboratoire I3S - SPARKS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Laboratoire de l'Informatique du Parallélisme (LIP), Grid'5000, ANR-06-CIS6-0005,HIPCAL,Performances previsibles et sécurité des communications dans un contexte de clusters virtuels dynamiques. Application aux domaines biomédical et bio-informatique.(2006), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Scalable and Pervasive softwARe and Knowledge Systems ( SPARKS ), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Protocols and softwares for very high-performance network ( RESO ), Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Laboratoire de l'Informatique du Parallélisme ( LIP ), École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Informatique du Parallélisme ( LIP ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ), and ANR-06-CIS6-005,HIPCAL,Performances previsibles et sécurité des communications dans un contexte de clusters virtuels dynamiques. Application aux domaines biomédical et bio-informatique.' ( 2006 )
Subjects: Cost estimate, Computer Networks and Communications, Computer science, Distributed computing, Network virtualization, Cloud computing, 02 engineering and technology, Workflows, Network Virtualization, [ INFO.INFO-DC ] Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], 0202 electrical engineering, electronic engineering, information engineering, Virtual network, business.industry, IaaS, 020206 networking & telecommunications, Provisioning, Cost reduction, Workflow, Resources allocation, Hardware and Architecture, Resource allocation, 020201 artificial intelligence & image processing, [INFO.INFO-DC]Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], business, Software, Description language, Information Systems
Abstract: International audience; Cloud computing infrastructures are providing resources on demand for tackling the needs of large-scale distributed applications. To adapt to the diversity of cloud infras- tructures and usage, new operation tools and models are needed. Estimating the amount of resources consumed by each application in particular is a difficult problem, both for end users who aim at minimizing their costs and infrastructure providers who aim at control- ling their resources allocation. Furthermore, network provision is generally not controlled on clouds. This paper describes a framework automating cloud resources allocation, deploy- ment and application execution control. It is based on a cost estimation model taking into account both virtual network and nodes managed by the cloud. The flexible provisioning of network resources permits the optimization of applications performance and infrastructure cost reduction. Four resource allocation strategies relying on the expertise that can be cap- tured in workflow-based applications are considered. Results of these strategies are confined virtual infrastructure descriptions that are interpreted by the HIPerNet engine responsible for allocating, reserving and configuring physical resources. The evaluation of this framework was carried out on the Aladdin/Grid'5000 testbed using a real application from the area of medical image analysis.
Published: 2010

6. Specifying and provisioning virtual infrastructures with HIPerNET

Author: Fabienne Anhalt, Pascale Vicat-Blanc Primet, and Guilherme Piêgas Koslovski
Subjects: Computer Networks and Communications, Computer science, business.industry, Distributed computing, Testbed, Reservation, Network virtualization, 020206 networking & telecommunications, Provisioning, 02 engineering and technology, Resource virtualization, Computer Science Applications, Scheduling (computing), 020210 optoelectronics & photonics, 0202 electrical engineering, electronic engineering, information engineering, Network performance, The Internet, business
Abstract: With the expansion and convergence of communication and computing, dynamic provisioning of customized networking and processing infrastructures, as well as resource virtualization, are appealing concepts and technologies. Therefore, new models and tools are needed to allow users to create, trust and enjoy such on-demand virtual infrastructures within a wide area context. This paper presents the HIPerNET framework we are designing and developing for creating, managing and controlling virtual infrastructures in the context of high-speed Internet. The key idea of this proposal is the combination of network- and system-virtualization associated with controlled resource reservation to provide fully isolated environments. HIPerNET's motivations and design principles are presented. Then we examine specifi cally how this framework handles the virtual infrastructures, called Virtual Private eXecution Infrastructures (VPXI). To help specifying customized isolated infrastructures, HIPerNET relies on VXDL, a language for VPXI description and modeling which considers end-host resource as well as the virtual network topology interconnecting them, including virtual routers. After the specifi cation, allocation and scheduling phases, HIPerNET helps in provisioning, deploying and confi guring virtual private execution infrastructures. This means, it triggers the dynamic confi guration of all the equipments involved. In this paper we concentrate on network confi guration, particularly to achieve network performance isolation. We also study and evaluate mechanisms to implement and confi gure virtual-link control. Experimental results obtained within the Grid'5000 testbed are presented and analyzed. Copyright © 2010 John Wiley & Sons, Ltd.
Published: 2010

7. CARRIOCAS Project: Towards Converged Internet Infrastructures Supporting High Performance Distributed Applications

Author: Pascale Vicat-Blanc Primet, D. Barth, D. Rodrigues, Maurice Gagnaire, O. Audouin, Christophe Mouton, Dominique Verchere, and L. Thual
Subjects: Engineering, Network architecture, business.industry, computer.internet_protocol, Distributed computing, Quality of service, Testbed, Service-oriented architecture, computer.software_genre, Atomic and Molecular Physics, and Optics, Network management, Grid computing, Distributed data store, The Internet, business, computer, Computer network
Abstract: The CARRIOCAS project studies and implements a high bit rate optical network capable of accommodating the requirements of data-intensive, high-performance distributed applications, in terms of bandwidth, quality of service guarantees, dynamic and automated service provisioning. The investigations are carried out under the constraints of supporting the applications on converged network infrastructures hosting other types of traffic. Distributed storage of massive volumes of data as well as collaborative high resolution remote visualization are under experimentation on a testbed. This paper analyzes the requirements brought by the applications on the network, compares different network architectures, presents the management architectures along with some resource selection optimization algorithms, and describes the testbed and tested applications.
Published: 2009

8. Fault tolerance for highly available internet services: concepts, approaches, and issues

Author: N. Ayari, D. Barbaron, Laurent Lefèvre, and Pascale Vicat-Blanc Primet
Subjects: business.industry, Computer science, Teleconference, Services computing, Fault tolerance, Computer security, computer.software_genre, Fault detection and isolation, Failover, Server, The Internet, Electrical and Electronic Engineering, Fault model, business, computer
Abstract: Fault-tolerant frameworks provide highly available services by means of fault detection and fault recovery mechanisms. These frameworks need to meet different constraints related to the fault model strength, performance, and resource consumption. One of the factors that led to this work is the observation that current fault-tolerant frameworks are not always adapted to existing Internet services. In fact, most of the proposed frameworks are not transport-level- or session-level-aware, although the concerned services range from regular services like HTTP and FTP to more recent Internet services such as multimodal conferencing and voice over IP. In this work we give a comprehensive overview of fault tolerance concepts, approaches, and issues. We show how the redundancy of application servers can be invested to ensure efficient failover of Internet services when the legitimate processing server goes down.
Published: 2008

9. Experiments with equivalent differentiated services in a grid context

Author: Pascale Vicat-Blanc Primet, Mathieu Goutelle, and François Echantillac
Subjects: Router, Interconnection, Computer Networks and Communications, business.industry, Computer science, Network packet, Quality of service, Distributed computing, Testbed, Local area network, Packet forwarding, Grid, law.invention, Differentiated services, Hardware and Architecture, Wide area network, law, Internet Protocol, business, Software, Computer network
Abstract: Grids generally rely on a complex interconnection of Internet Protocol (IP) domains that offer heterogeneous services and unpredictable performance characteristics, particularly at the local area network/wide area network boundary. The total lack of end-to-end resource control in IP networks is responsible for performance problems that may affect the whole Grid environment. An end-to-end service differentiation architecture that controls heterogeneous communication performance is thus needed. We propose the Equivalent Differentiated Services (EDS) architecture, based on a layer-4 service differentiation solution exploiting a new layer-3 relative DiffServ model. In this paper, we present the EDS packet forwarding principles, the router mechanisms and two adaptive packet marking algorithms. As a proof of concept, we have implemented the EDS architecture in Linux and performed experiments on a transoceanic testbed.
Published: 2005

10. High-speed networks and services for data-intensive Grids: The DataTAG Project

Author: Pascale Vicat-Blanc Primet and Jean-Philippe Martin-Flatin
Subjects: Computer Networks and Communications, Hardware and Architecture, Computer science, business.industry, Telecommunications, business, Software
Published: 2005

11. Active and logistical networking for grid computing: the e-Toile architecture

Author: Micah Beck, Terry Moore, Pascale Vicat-Blanc Primet, Jean-Patrick Gelas, James S. Plank, Alessandro Bassi, and Laurent Lefèvre
Subjects: Data stream, Data grid, Computer Networks and Communications, business.industry, Computer science, Node (networking), Distributed computing, computer.software_genre, Grid, Grid computing, Hardware and Architecture, Network service, The Internet, business, Protocol (object-oriented programming), computer, Software, Computer network, Active networking
Abstract: While active networks provide new solutions for the deployment of dynamic services in the network, exposing network processing resources, logistical networking focuses on exposing storage resources inside networks, optimizing the global scheduling of data transport, data storage and computation. In this paper, we show how active and logistical environments working together can improve grid middleware, and provide new and innovative high-level services for grid applications. We have experimented with this approach by combining the Internet Backplane Protocol suite with the Tamanoir Active Node environment. Our target architecture is the French e-Toile Grid infrastructure based on a high performance backbone (Vraiment Tres Haut Debit, VTHD).
Published: 2005

12. Approches alternatives pour la différenciation de services IP

Author: Pascale Vicat-Blanc Primet, Benjamin Gaidioz, and Mathieu Goutelle
Subjects: Service (business), Service quality, business.industry, Computer science, Quality of service, computer.software_genre, law.invention, Risk analysis (engineering), law, Transport layer, Internet Protocol, The Internet, Web service, business, Adaptation (computer science), computer, Computer network
Abstract: This article studies the problem of service differentiation in IP networks. The limits of the standard models are analysed and alternative solutions like the proportional differentiation and the non-elevated services are presented. These services are simpler to set up but need adaptation layers to insure correct end-to-end performances. To illustrate these approaches the EDS model from the INRIA/RESO team and the QBSS-LBE model of the internet2 project are explored and their properties studied practically. This study highlights the benefit of a global approach of Quality of Service in internet and open many perspectives of research on the transport layer.
Published: 2004

13. Protocols for fast, long-distance networks

Author: Pascale Vicat-Blanc Primet, Joseph D. Touch, and Katsushi Kobayashi
Subjects: Computer Networks and Communications, Computer science, business.industry, business, Computer network
Published: 2007

14. Specificities of Computing Networks

Author: Brice Goglin, Pascale Vicat‐Blanc, Romaric Guillier, and Sébastien Soudan
Subjects: Network transparency, Computer science, business.industry, Distributed computing, business, Computer network
Published: 2013

15. The GEYSERS Concept and Major Outcomes

Author: Nicola Ciulli, Anna Tzanakaki, Artur Binczewski, Pascale Vicat‐Blanc, Bartosz Belter, Joan A. Garcia-Espin, Sergi Figuerola, Dimitra Simeonidou, E. Escalona, Giada Landi, Philip Robinson, Matteo Biancani, Cees de Laat, and Juan Rodriguez
Subjects: Flexibility (engineering), Service (systems architecture), Geography, business.industry, Service delivery framework, Distributed computing, Optical networking, Provisioning, Cloud computing, The Internet, Dynamic infrastructure, business, Seismology
Abstract: Large-scale computer networks supporting both communication and computation are extensively employed to deal with a variety of existing and emerging demanding applications. These high-performance applications, requiring very high network capacities and specific IT resources, cannot be delivered by the current Best Effort Internet. Optical networking is offering a very high capacity transport with increased dynamicity and flexibility through recent technology advancements including dynamic control planes etc. The European project GEYSERS (Generalised Architecture for Dynamic Infrastructure Services) proposed a novel architecture capable of provisioning “Optical Network and IT resources” for end-to-end service delivery. The proposed approach adopts the Infrastructure as a Service (IaaS) paradigm. The GEYSERS architecture presents an innovative solution to enable infrastructure operators to virtualize their optical network + IT physical resources and offer them as a service based on the user/application requirements. The adoption of Virtual Infrastructures (VIs) facilitates sharing of physical resources among various virtual operators, introducing new business models that suit well the nature and characteristics of the Future Internet and enables new exploitation opportunities for the underlying Physical Infrastructures (PIs).
Published: 2013

16. Conclusion

Author: Sébastien Soudan, Brice Goglin, Pascale Vicat‐Blanc, and Romaric Guillier
Subjects: World Wide Web, business.industry, Computer science, The Internet, business, Computer network
Published: 2013

17. From Multiprocessor Computers to the Clouds

Author: Brice Goglin, Pascale Vicat‐Blanc, Romaric Guillier, and Sébastien Soudan
Subjects: Grid computing, Utility computing, business.industry, Computer science, Computer cluster, Multiprocessing, Cloud computing, Parallel computing, computer.software_genre, business, computer
Published: 2013

18. The Challenge of Latency in Computing Clusters

Author: Romaric Guillier, Pascale Vicat‐Blanc, Sébastien Soudan, and Brice Goglin
Subjects: Software, Computer science, business.industry, Message passing, Parallel computing, Latency (engineering), business
Published: 2013

19. Optical Technology and Grids

Author: Brice Goglin, Pascale Vicat‐Blanc, Romaric Guillier, and Sébastien Soudan
Subjects: business.industry, Computer science, Optical engineering, Optical communication, Electrical engineering, business, Optical burst switching, Computer network
Published: 2013

20. Measuring End-to-End Performances

Author: Sébastien Soudan, Romaric Guillier, Brice Goglin, and Pascale Vicat‐Blanc
Subjects: Engineering, Measurement method, End-to-end principle, business.industry, Embedded system, Architecture, business
Published: 2013

21. The Challenge of Throughput and Distance

Author: Brice Goglin, Sébastien Soudan, Romaric Guillier, and Pascale Vicat‐Blanc
Subjects: Network congestion, TCP Westwood plus, TCP acceleration, Computer science, business.industry, Packet loss, HSTCP, Real-time computing, Scalable TCP, business, Throughput (business), BIC TCP, Computer network
Published: 2013

22. Security of Computing Networks

Author: Sébastien Soudan, Pascale Vicat‐Blanc, Brice Goglin, and Romaric Guillier
Subjects: Cloud computing security, Computer science, business.industry, Information security, Computer security model, Computer security, computer.software_genre, Security information and event management, Security service, Security association, Network Access Control, Network security policy, business, computer, Computer network
Published: 2013

23. Bandwidth on Demand

Author: Brice Goglin, Romaric Guillier, Sébastien Soudan, and Pascale Vicat‐Blanc
Subjects: Dynamic bandwidth allocation, business.industry, On demand, Distributed computing, Bandwidth (signal processing), Business, Bandwidth throttling, Net neutrality, Computer network
Published: 2013

24. Practical Guide for the Configuration of High-speed Networks

Author: Pascale Vicat‐Blanc, Romaric Guillier, Brice Goglin, and Sébastien Soudan
Subjects: business.industry, Computer science, Embedded system, Multi flow, business, Computer hardware, Software configuration management
Published: 2013

25. Locating Virtual Infrastructures: Users and InP perspectives

Author: Sébastien Soudan, Paulo Gonçalves, Pascale Vicat‐Blanc, Guilherme Piêgas Koslovski, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Grid'5000, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: business.industry, Computer science, Network communication, Distributed computing, 020206 networking & telecommunications, Cloud computing, Provisioning, 02 engineering and technology, computer.software_genre, Virtualization, virtualization, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Virtual machine, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, The Internet, Minification, Networks, infrastructures, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, computer, Computer network
Abstract: International audience; The Cloud Computing wave consolidates the on-demand provisioning of configurable virtual machines. Recent projects have proposed the extension of the original IaaS paradigm to provide dynamic virtual networks to interconnect virtual IT resources, composing Virtual Infrastructures (VIs). In this new scenario, users with different objectives and expectations can rent dynamically provisioned virtual infrastructures to execute their applications during a given time slot. VIs can be allocated anywhere on top of a distributed and virtualized substrate. This decoupling from the geographical location introduces concerns such as a latency increase in network communications (user's perspective), and the fragmentation of physical resources (Infrastructure Provider's - InP - perspective). This context motivates efforts to investigate and deploy new models and tools which consider the geographical location of virtual infrastructures. Our work concentrates on the allocation of VIs guided by both the user's and the InP's constraints. We propose a formulation of the allocation problem considering the user's expectations as well as the physical-substrate provider's goals. Our initial experiments demonstrate that it is possible to improve the quality of the virtual-infrastructure allocation (user perspective) while simultaneously decreasing the physical substrate's fragmentation and the substrate's cost.
Published: 2011

26. VXDL: Virtual Resources and Interconnection Networks Description Language

Author: Guilherme Piêgas Koslovski, Andrea Schwertner Charão, Pascale Vicat-Blanc Primet, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Informatique et Distribution (ID-IMAG), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Laboratório de Sistemas de Computação (LSC), Universidade Federal de Santa Maria (UFSM), Grid'5000, École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Universidade Federal de Santa Maria = Federal University of Santa Maria [Santa Maria, RS, Brazil] (UFSM), Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-École normale supérieure - Lyon (ENS Lyon)
Subjects: Data grid, Modeling language, Computer science, business.industry, Distributed computing, [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], Network virtualization, 020206 networking & telecommunications, Provisioning, Context (language use), 02 engineering and technology, Grid, 0202 electrical engineering, electronic engineering, information engineering, Benchmark (computing), 020201 artificial intelligence & image processing, The Internet, business
Abstract: International audience; Data grid applications require often an access to infrastructures with high performance data movement facilities coordinated with computational resources. Other applications need interconnections of large scale instruments with HPC platforms. In these context, dynamic provisioning of customized computing and networking infrastructure as well as resource virtualization are appealing technologies. Therefore new models and tools must be studied and developed to allow users create and handle such on-demand virtual infrastructures within grid platforms or even within the Internet. This work presents VXDL, a language for virtual resources interconnection networks specification and modeling. Besides allowing end resources description, VXDL lets users describe the desirable virtual network topology, including virtual routers and timeline. In this paper we motivate and present the key features of our modeling language. We explore typical examples to demonstrates the expressiveness and the pertinence of it. Then we detail experimental results based on the execution of NAS benchmark on virtual infrastructures, conforming different VXDL specifications.
Published: 2010

27. Petaflow: a project towards information and communication technologies in society

Author: Xavier Grandchamp, Paulo Gonçalves, Ken-ichi Baba, Yasuo Ebara, Shigeo Wada, Kohji Koyamada, Shinji Shimojo, Pascale Vicat-Blanc, Xavier Pelorson, Hiroyuki Ohsaki, Naohisa Sakamoto, Eisaku Sakane, Annemie Van Hirtum, Takuma Kawamura, Bruno Raffin, Kazunori Nozaki, Julien Cisonni, GIPSA - Group aeroacoustics, modeling and application (GIPSA-GAMA), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Department of Information and Computer Sciences [Toyonaka], Osaka University, Kyoto University, National Institute of Information and Communications Technology [Tokyo, Japan] (NICT), PrograMming and scheduling design fOr Applications in Interactive Simulation (MOAIS), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire d'Informatique de Grenoble (LIG), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), National Institute of Informatics (NII), Cybermedia Center [Osaka] (CMC), Osaka University [Osaka], Protocols and softwares for very high-performance network (RESO), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), ANR-09-BLAN-0376,PetaFlow,Calculs intensifs, visualisation scientifique et transfert haut débit international pour des données d?échelle peta: application à l?écoulement dans les voies supérieure de l?Homme(2009), Kyoto University [Kyoto], Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), and Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], business.industry, Computer science, 05 social sciences, Scientific visualization, Information technology, 050801 communication & media studies, 020207 software engineering, 02 engineering and technology, Data science, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Engineering management, 0508 media and communications, Data visualization, metrology, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Information and Communications Technology, Mutual awareness, networks, 0202 electrical engineering, electronic engineering, information engineering, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, Computer network management
Abstract: International audience; The Petaflow project aims to contribute to the use of high performance computational resources to the benefit of society. To this goal the emergence of adequate information and communication technologies with respect to high performance computing-networking-visualisation and their mutual awareness is required. The developed technology and algorithms will be applied to a real peta-scale data intensive scientific problem with social importance, i.e. human upper airway flow modelling.
Published: 2010

28. A virtual switch architecture for hosting virtual networks on the Internet

Author: Fabienne Anhalt, Pascale Vicat-Blanc Primet, and Dinil Mon Divakaran
Subjects: business.industry, Computer science, Distributed computing, Temporal isolation among virtual machines, Virtualization, computer.software_genre, Packet switching, Forwarding plane, Resource allocation, The Internet, Resource management, business, Host (network), computer, Computer network
Abstract: The future Internet is envisioned to host a large number of virtual networks managed by different operators sharing the same physical infrastructure. In such a scenario, an operator may not even own physical resources as such, but lease virtual resources to have their own virtual networks. While control-plane virtualization with several routing instances becomes common in equipments, the data plane is generally shared relying on logical isolation or resource segmentation, lacking in efficient sharing with performance guarantees. This makes it necessary to look into layer 2, and virtualize the switching fabric to have control over the sharing of the most critical resources for packet switching. In this article, we come up with a flexible architectural design for virtualizing a switching fabric. This new architecture enables a multitude of choices to customize virtual switches as needed. Our simulations show the relative loss in performance brought by virtualization, and demonstrate how the offered flexibility can help in exploiting the resources in a new way, satisfying independent virtual switch requirements.
Published: 2010

29. Investigating self-similarity and heavy-tailed distributions on a large scale experimental facility

Author: Pascale Vicat-Blanc Primet, Guillaume Dewaele, Patrick Loiseau, Patrice Abry, Paulo Gonçalves, Pierre Borgnat, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Informatique du Parallélisme (LIP), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Self-similarity, Long range dependence, Computer Networks and Communications, Computer science, Real-time computing, 02 engineering and technology, computer.software_genre, 01 natural sciences, Internet Traffic Model, 010104 statistics & probability, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Web traffic, 0202 electrical engineering, electronic engineering, information engineering, Observability, 0101 mathematics, Electrical and Electronic Engineering, Grid, business.industry, Network packet, 020206 networking & telecommunications, Internet traffic, Computer Science Applications, Heavy-tailed distribution, The Internet, Data mining, Heavy tail, business, computer, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Software
Abstract: After the seminal work by Taqqu et al. relating self-similarity to heavy-tailed distributions, a number of research articles verified that aggregated Internet traffic time series show self-similarity and that Internet attributes, like Web file sizes and flow lengths, were heavy-tailed. However, the validation of the theoretical prediction relating self-similarity and heavy tails remains unsatisfactorily addressed, being investigated using either numerical or network simulations, or from uncontrolled Web traffic data. Notably, this prediction has never been conclusively verified on real networks using controlled and stationary scenarios, prescribing specific heavy-tailed distributions, and estimating confidence intervals. With this goal in mind, we use the potential and facilities offered by the large-scale, deeply reconfigurable and fully controllable experimental Grid5000 instrument, combined with state-of-the-art estimators, to investigate the prediction's observability on real networks. To this end, we organize a large number of controlled traffic circulation sessions on a nationwide real network involving 200 independent hosts. We use a FPGA-based measurement system to collect the corresponding traffic at packet level. We then estimate both the self-similarity exponent of the aggregated time series and the heavy-tail index of flow-size distributions, independently. Not only do our results complement and validate, with a striking accuracy, some conclusions drawn from a series of pioneering studies, but they also bring in new insights on the controversial role of certain components of real networks.
Published: 2010

30. Size-Based Flow Scheduling in a CICQ Switch

Author: Pascale Vicat-Blanc Primet, Fabienne Anhalt, Dinil Mon Divakaran, Eitan Altman, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Models for the performance analysis and the control of networks (MAESTRO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), INRIA, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Queueing theory, business.industry, Network packet, Computer science, Quality of service, 0102 computer and information sciences, 02 engineering and technology, 01 natural sciences, 020202 computer hardware & architecture, Scheduling (computing), [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Packet switching, 010201 computation theory & mathematics, Scalability, 0202 electrical engineering, electronic engineering, information engineering, business, Communication complexity, Queue, Computer network
Abstract: In the context of flow-aware networking, size-based (SB) scheduling policies have been shown to improve response times of small flows, without degrading the performance of large flows. But these differentiating policies are designed for Output-queued (OQ) switch architecture, which is known to have scalability issues. On the other hand, the buffered-crossbar (BX) switch architecture is currently being pursued as a potential next-generation scalable switch architecture. This work looks into the problem of performing SB scheduling in BX switches. In particular, the design goals, with respect to each output port, are (i) to transmit high-priority packet(s) as long as there is at least one present, and (ii) to respect the FIFO order among high-priority packets. In this direction, we propose a CICQ switches using a single PIFO queue at each crosspoint to schedule packets according to the priority assigned. pCICQ-1 switch uses a simple design to guarantee that packet-priorities are respected once they are in the crosspoint queues. But it does not maintain the FIFO order of high-priority packets, besides letting a bounded number low-priority packets to depart through an output, when there are one or more high-priority packets for the same output. To solve this, we propose an enhancement in pCICQ-2 switch, that uses a sequence controller to respect packet-priorities as well as arrival order for high-priority packets.
Published: 2010

31. Executing distributed applications on virtualized infrastructures specified with the VXDL language and managed by the HIPerNET framework

Author: Pascale Vicat-Blanc Primet, Johan Montagnat, Tram Truong Huu, Guilherme Piêgas Koslovski, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe MODALIS, Scalable and Pervasive softwARe and Knowledge Systems (Laboratoire I3S - SPARKS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Laboratoire de l'Informatique du Parallélisme (LIP), This work has been funded by the ANR CIS HIPCAL grant (contract ANR06- CIS-005), the French ministry of Education and Research, INRIA, and CNRS, via ACI GRID's Grid'5000 project and Aladdin ADT., Dimiter R. Avresky, Michel Diaz, Arndt Bode, Bruno Ciciani, Eliezer Dekel, Grid'5000, ANR-06-CIS6-0005,HIPCAL,Performances previsibles et sécurité des communications dans un contexte de clusters virtuels dynamiques. Application aux domaines biomédical et bio-informatique.(2006), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Protocols and softwares for very high-performance network ( RESO ), Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Laboratoire de l'Informatique du Parallélisme ( LIP ), École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), Scalable and Pervasive softwARe and Knowledge Systems ( SPARKS ), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Informatique du Parallélisme ( LIP ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ), and ANR : 1604,1604
Subjects: Virtual Infrastructure as a service, Computer science, business.industry, Distributed computing, Testbed, 020206 networking & telecommunications, Cloud computing, 02 engineering and technology, Workflow engine, workflow language, [ INFO.INFO-DC ] Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], Software deployment, application mapping, 0202 electrical engineering, electronic engineering, information engineering, topology language, 020201 artificial intelligence & image processing, [INFO.INFO-DC]Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], business, resource virtualization, graph embedding problem
Abstract: International audience; With the convergence of computing and communication, and the expansion of cloud computing, new models and tools are needed to allow users to define, create, and exploit on-demand virtual infras- tructures within wide area distributed environments. Optimally design- ing customized virtual execution-infrastructure and executing them on a physical substrate remains a complex problem. This paper presents the VXDL language, a language for specifying and describing virtual infras- tructures and the HIPerNET framework to manage them. Based on the example of a specific biomedical application and workflow engine, this paper illustrates how VXDL enables to specify different customized vir- tual infrastructures and the HIPerNET framework to execute them on a distributed substrate. The paper presents experiments of the deploy- ment and execution of this application on different virtual infrastructures managed by our HIPerNet system. All the experiments are performed on the Grid'5000 testbed substrate.
Published: 2009

32. A Scalable Security Model for Enabling Dynamic Virtual Private Execution Infrastructures on the Internet

Author: Vincent Roca, Jean-Patrick Gelas, Tram Truong Huu, Guilherme Piêgas Koslovski, Pascale Vicat-Blanc Primet, Lionel Giraud, Johan Montagnat, Olivier Mornard, Laboratoire de l'Informatique du Parallélisme (LIP), Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Protocols and applications for the Internet (PLANETE), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe MODALIS, Scalable and Pervasive softwARe and Knowledge Systems (Laboratoire I3S - SPARKS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), This work has been funded by the ANR CIS HIPCAL grant (contract ANR06CIS005), the French ministry of Education and Research, INRIA, and CNRS, via ACI GRID's Grid'5000 project and Aladdin ADT., Grid'5000, ANR-06-CIS6-0005,HIPCAL,Performances previsibles et sécurité des communications dans un contexte de clusters virtuels dynamiques. Application aux domaines biomédical et bio-informatique.(2006), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), Laboratoire de l'Informatique du Parallélisme ( LIP ), École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ), Protocols and softwares for very high-performance network ( RESO ), Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Laboratoire de l'Informatique du Parallélisme ( LIP ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), Protocols and applications for the Internet ( PLANETE ), Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Inria Sophia Antipolis - Méditerranée ( CRISAM ), Institut National de Recherche en Informatique et en Automatique ( Inria ), Scalable and Pervasive softwARe and Knowledge Systems ( SPARKS ), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ) -Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis ( I3S ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), and ANR : 1604,1604
Subjects: business.industry, Computer science, Distributed computing, 020206 networking & telecommunications, Access control, Provisioning, 02 engineering and technology, Computer security model, Cryptographic protocol, computer.software_genre, [ INFO.INFO-DC ] Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], Virtual machine, Scalability, 0202 electrical engineering, electronic engineering, information engineering, Resource allocation, authorization, 020201 artificial intelligence & image processing, The Internet, [INFO.INFO-DC]Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], business, resource virtualization, SPKI, computer, Execution Infrastructure as a service
Abstract: International audience; With the expansion and the convergence of computing and communication, the dynamic provisioning of customized pro- cessing and networking infrastructures as well as resource virtualization are appealing concepts and technologies. There- fore, new models and tools are needed to allow users to create, trust and exploit such on-demand virtual infrastruc- tures within wide area distributed environments. This pa- per proposes to combine network and system virtualization with cryptographic identification and SPKI/HIP principles to help the user communities to build and share their own re- source reservoirs. These ideas are implemented in the HIPer- Net framework enabling the creation and the management of customized confined execution environments in a large scale context. Based on the example of biomedical applications, the paper focuses on the security model of the HIPerNet system and develops the key aspects of our distributed se- curity approach. Then the paper discusses and illustrates how HIPerNet solutions fulfill the security requirements of applications through different scenarios.
Published: 2009

33. Analysis of the effects of XLFrames in a network

Author: Ludovic Noirie, Georg Post, Pascale Vicat-Blanc Primet, Eitan Altman, Dinil Mon Divakaran, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Models for the performance analysis and the control of networks (MAESTRO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Alcatel-Lucent Bell Labs France [Nozay], Alcatel-Lucent Bell Labs France, Common Lab Inria / Alcatel-Lucent on 'self-organizing networks', École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Network packet, computer.internet_protocol, business.industry, Computer science, 05 social sciences, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 050801 communication & media studies, 020206 networking & telecommunications, Throughput, 02 engineering and technology, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0508 media and communications, Internet protocol suite, 0202 electrical engineering, electronic engineering, information engineering, The Internet, business, computer, Loss rate, Computer network
Abstract: International audience; The phenomenal increase in network capacity to hundreds and thousands of Gbits/s in the core as well as Gbits/s at the access, is soon to witness stupendous amounts of packets that have to be processed and switched at amplifying line rates. Looking into the future, we address the need for the integration of packets of larger size, called XLFrames (XLFs), into the future Internet framework. This paper analyses the effects of introducing XLFs in a network that has both packets and XLFs. We evaluate the gains in terms of processing power and throughput. As we observe that XLFs have an impact on loss rate and fairness, we study how, with minimal efforts at routers while keeping the existing protocols (TCP/UDP, IP), XLFs may integrate in the current scenario.
Published: 2009

34. Analysis and Experimental Evaluation of Data Plane Virtualization with Xen

Author: Fabienne Anhalt, Pascale Vicat-Blanc Primet, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Informatique du Parallélisme (LIP), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), IEEE, Grid'5000, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Application virtualization, Computer science, business.industry, Full virtualization, Hardware virtualization, [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], Temporal isolation among virtual machines, 020206 networking & telecommunications, 02 engineering and technology, Storage virtualization, Virtualization, computer.software_genre, Virtual machine, 0202 electrical engineering, electronic engineering, information engineering, Operating system, 020201 artificial intelligence & image processing, business, computer, Data virtualization, Computer network
Abstract: International audience; Combining end-host, server and router virtualization could offer isolated and malleable virtual networks of different types, owners and protocols, all sharing one physical infrastructure. However, the virtualization of data plane may lead to performance degradation and indeterminism. These arise not only due to additional processing, but also from the sharing of physical resources like memory, CPU and network devices. This paper analyses virtualization from the data plane perspective. We explore the resulting network performance in terms of throughput, packet loss and latency between virtual machines, and also the correspondig CPU cost. The virtual machines act as senders or receivers, or as software routers forwarding traffic between two interfaces in the context of Xen. Our results show that the impact of virtualization on network performance is getting smaller with the successive Xen versions, making this approach a promising solution for data plane virtualization.
Published: 2009

35. From Packets to XLFrames: Sand and Rocks for Transfer of Mice and Elephants

Author: Dinil Mon Divakaran, Ludovic Noirie, Georg Post, Pascale Vicat-Blanc Primet, Eitan Altman, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Models for the performance analysis and the control of networks (MAESTRO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Alcatel-Lucent Bell Labs France [Nozay], Alcatel-Lucent Bell Labs France, Common Lab Inria / Alcatel-Lucent on 'self-organizing networks', École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Queue management system, business.industry, Network packet, Computer science, 020206 networking & telecommunications, Throughput, 0102 computer and information sciences, 02 engineering and technology, Energy consumption, 01 natural sciences, Multiplexing, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Packet switching, 010201 computation theory & mathematics, 0202 electrical engineering, electronic engineering, information engineering, The Internet, Network performance, business, Efficient energy use, Computer network
Abstract: International audience; Looking into the future, this paper presents the effects of having packets of large sizes, called XLFrames (XLFs), in a network. The analysis is motivated by the fact that the Internet is soon to witness stupendous amounts of traffic that have to be processed and switched at amplifying line rates; and this brings forth multiple challenges in the form of energy efficiency, network performance and end-host performance. Increasing the size of packets in the Internet has far-reaching incentives that otherwise appear hard to achieve. We foresee an Internet that multiplexes both packets (sand) and XLFs (rocks). As a first step, we analyse the effects of introducing XLFs in a network, and find the following: (i) the amount of packet-header processing is greatly reduced, (ii) while the fair multiplexing of XLFs with standard packets can be achieved using a careful queue management in routers.
Published: 2009

36. A simulation study of passive inference of TCP rate and detection of congestion

Author: Pascale Vicat-Blanc Primet, Giovanna Carofiglio, Georg Post, Mouhamad Ibrahim, and Eitan Altman
Subjects: CUBIC TCP, TCP acceleration, business.industry, Computer science, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Real-time computing, TCP tuning, TCP global synchronization, Network congestion, TCP Friendly Rate Control, TCP Westwood plus, HSTCP, business, Computer network
Abstract: In this paper, we propose and implement a mechanism for network simulator-2 (ns-2) to estimate the individual rates of TCP flows and to detect their incipient congestion. Rate estimation as well as congestion detection are based on measurements collected passively by a monitoring node which is located on the intermediate paths between TCP source destination pairs. While estimating the rate of a given flow relies on measuring its interpacket times as well as the size of its received packets, the congestion detection sub-mechanism analyses the variability of its growth rate over a sliding window to decide on a incipient congestion. Our proposed method does not rely on estimating the RTTs to detect congestion, nor on ACK packets traversing the backward paths to collect measurements samples. Moreover, it does not impose any constraint regarding the location of the monitoring router with respect to bottleneck links. Throughout the various simulations that we have conducted, our method has shown high efficiency in detecting the occurrence of incipient congestion on the monitored flows over relatively short time periods. The method is useful for monitoring and controlling the rates of large TCP flows passing through an autonomous system.
Published: 2009

37. A Flow Scheduler Architecture

Author: Pascale Vicat-Blanc Primet, Giovanna Carofiglio, Eitan Altman, Dinil Mon Divakaran, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Alcatel Lucent Bell Labs, ALCATEL, Models for the performance analysis and the control of networks (MAESTRO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), INRIA, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Alcatel-Lucent Bell Labs, Mark Crovella, Laura Marie Feeney, Dan Rubenstein, S. V. Raghavan, and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Future Internet, Queueing theory, business.industry, Computer science, Scheduling, Quality of service, QoS, 020206 networking & telecommunications, 02 engineering and technology, 01 natural sciences, Scheduling (computing), 010104 statistics & probability, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architecture, 0202 electrical engineering, electronic engineering, information engineering, [INFO.INFO-DL]Computer Science [cs]/Digital Libraries [cs.DL], The Internet, 0101 mathematics, business, Sampling, Computer network
Abstract: International audience; Scheduling flows in the Internet has sprouted much interest in the research community leading to the development of many queueing models, capitalizing on the heavy-tail property of flow size distribution. Theoretical studies have shown that 'size-based' schedulers improve the delay of small flows without almost no performance degradation to large flows. On the practical side, the issues in taking such schedulers to implementation have hardly been studied. This work looks into practical aspects of making size-based scheduling feasible in future Internet. In this context, we propose a flow scheduler architecture comprising three modules -- Size-based scheduling, Threshold-based sampling and Knockout buffer policy -- for improving the performance of flows in the Internet. Unlike earlier works, we analyze the performance using five different performance metrics, and through extensive simulations show the goodness of this architecture.
Published: 2009

38. Virtualizing and scheduling optical network infrastructure for emerging IT services

Author: Pascale Vicat-Blanc Primet, Sébastien Soudan, Dominique Verchere, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Alcatel-Lucent Bell Labs France [Nozay], Alcatel-Lucent Bell Labs France, Grid'5000, and École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Business requirements, Computer Networks and Communications, business.industry, Computer science, Distributed computing, [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], 020206 networking & telecommunications, Provisioning, 02 engineering and technology, Virtualization, computer.software_genre, Networking hardware, Scheduling (computing), 020210 optoelectronics & photonics, Bandwidth allocation, Server, 0202 electrical engineering, electronic engineering, information engineering, The Internet, business, computer, Computer network
Abstract: International audience; Emerging IT service providers that aim at delivering supercomputing power available to the masses over the Internet rely on high-performance IT resources interconnected with ultra-high-performance optical networks. To adjust the provisioning of the resources to end-user demand variations, new infrastructure capabilities have to be supported. These capabilities have to take into account the business requirements of telecom networks. This paper proposes a service framework to offer Internet service providers dynamic access to extensible virtual private execution infrastructures, through on-demand and in-advance bandwidth and resource reservation services. This virtual infrastructure service concept is being studied in the CARRIOCAS project and implemented thanks to the scheduling, reconfiguration, and virtualization (SRV) component. This entity handles the service requests, aggregates them, and triggers the provisioning of different types of resources accordingly. We propose to adapt to envisioned heterogeneous needs by multiplexing rigid and flexible requests as well as coarse or fine demands. The goal is to optimize both resource provisioning and utility functions. Considering the options of advanced network bandwidth reservations and allocations, the optimization problem is formulated. The impacts of the malleability factor are studied by simulation to assess the gain.
Published: 2009

39. Grid Network Dimensioning by Modeling the Deadline Constrained Bulk Data Transfers

Author: Pascale Vicat-Blanc Primet, Michael Welzl, and Kashif Munir
Subjects: Queueing theory, Grid network, Transmission Control Protocol, business.industry, Computer science, Distributed computing, Admission control, computer.software_genre, Bottleneck, law.invention, Capacity planning, Grid computing, law, Internet Protocol, Computer Science::Networking and Internet Architecture, business, Queue, Dimensioning, computer, Computer network
Abstract: Grid applications need to move large amounts of data between distributed resources within deterministic timeframes. In most cases it is possible to specify the volume and the deadline in advance. We formally define and analyze a mechanism of network reservations of bulk data transfer requests having opportunistic utilization of residual network capacity and analyze it using an M/M/1/N-RPS queue. We compare the analytical results of our mechanism with the analytical results obtained from an M/M/N/N queue, for the case in which there is no opportunistic sharing of residual capacity. We validate the analytical results through simulations in C++. The analytical model is also validated against ns-2 simulations taking into account network level details (IP and TCP protocols), showing remarkably good coherence even under heavy loads. The model is orders of magnitude faster than simulation, which enables its application for capacity planning of Grid networks (also known as network dimensioning), and to enforce Connection Admission Control (CAC) under the practical hypothesis of a dominating bottleneck on the transfer route.
Published: 2009

40. Flow scheduling and endpoint rate control in GridNetworks

Author: Binbin Chen, Sébastien Soudan, Pascale Vicat-Blanc Primet, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Department of Computer Science - Singapore, National University of Singapore (NUS), Grid'5000, and École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Computer Networks and Communications, business.industry, Network packet, Computer science, Distributed computing, [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], 020206 networking & telecommunications, Linux kernel, 02 engineering and technology, Grid, Scheduling (computing), Network congestion, Bandwidth allocation, Hardware and Architecture, 0202 electrical engineering, electronic engineering, information engineering, Forwarding plane, 020201 artificial intelligence & image processing, business, Time complexity, Software, Computer network
Abstract: International audience; In grid networks, distributed resources, computing or storage elements as well as scientific instruments are interconnected to support computing-intensive and data-intensive applications. To facilitate the efficient scheduling of these resources,wepropose to manage the movements of massive data set between them. This paper formulates the bulk data transfer scheduling problem and presents an optimal solution to minimize the network congestion factor of a dedicated network or an isolated traffic class. The solution satisfying individual flows' time and volume constraints can be found in polynomial time and expressed as a set of multi-interval bandwidth allocation profiles. To ensure a large-scale deployment of this approach, we propose, for the data plane, a combination of a bandwidth profile enforcement mechanism with traditional transport protocols. The paper examines several solutions for implementing such a mechanism in a Linux kernel. The experimental evaluation shows that packet pacing performed at IP level offers a simple yet valuable and TCP-compatible solution for accurate bandwidth profile enforcement at very high speed.
Published: 2009

41. Automatic Network Services Aligned with Grid Application Requirements in CARRIOCAS Project

Author: Remi Theillaud, Dominique Verchere, O. Audouin, Helia Pouyllau, Vincent Reinhart, Veronique Piperaud, Richard Douville, T. Marcot, Sébastien Soudan, Pascale Vicat-Blanc Primet, A. Chiosi, Joanna Tomasik, Marcelo Pasin, Christian Cadere, Bela Berde, Dominique Barth, and Dohy Hong
Subjects: Computer science, Level of service, business.industry, Distributed computing, 05 social sciences, Transport network, Control reconfiguration, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Virtualization, computer.software_genre, Grid, Scheduling (computing), 0508 media and communications, Workflow, Telecom network, Network service, 0202 electrical engineering, electronic engineering, information engineering, business, computer, Computer network
Abstract: Automatic Service framework named Scheduling, Reconfiguration and Virtualization (SRV) is developed in CARRIOCAS project to enhance existing Telecom network infrastructures for supporting grid applications sharing IT resources interconnected with ultra-high performance optical networks. From the requirements of Grid applications a classification is pro po sed to specify the network services and their attributes. In large-scale collaborative environments, SRV solution is described to enable automatic network service operations according to high-performance computing service access. The resources hosted at datacenters are virtualized to be attached to transport network infrastructure offering uniform interfaces towards external cus tomers. New level of service bindings is defined with network services du ring executions of Grid applications’ workflows. On-demand intensive com puting and visualization services scenario is described in Telecom environment.
Published: 2009

42. Optimizing deadline-driven bulk data transfers in overlay networks

Author: Andrei Agapi, Sébastien Soudan, Pascale Vicat-Blanc Primet, Marcelo Pasin, Thilo Kielmann, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Gonçalves, Paulo, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Computer Systems, Network Institute, High Performance Distributed Computing, and Repositório da Universidade de Lisboa
Subjects: Computer science, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, Distributed computing, Overlay network, 050801 communication & media studies, 0102 computer and information sciences, 01 natural sciences, Scheduling (computing), 0508 media and communications, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, PlanetLab, ComputingMilieux_MISCELLANEOUS, networks with advanced reservations, deadline-driven transfer scheduling, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, Internet, business.industry, x-proceedings = yes, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 05 social sciences, Internet traffic, x-international-audience=yes, Grid, Network congestion, 010201 computation theory & mathematics, Computer Science, The Internet, x-editorial-board=yes, business, routing overlays, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Heuristic routing, congestion minimization, Computer network
Abstract: Deadline-driven bulk data transfers frequently occur in overlay networks running data-intensive, dis- tributed workflow applications, such as grid and cloud envi- ronments. What distinguishes such transfers from other In- ternet traffic is that overlay nodes should cooperate towards the common goal of delivering all inter-dependent data timely, rather than follow individual, selfish goals. For such scenarios, we propose scheduling transfers in overlays in a globally optimal manner with respect to minimizing overall network congestion. Our optimization jointly addresses routing of transfers within the overlay and the time-domain scheduling of transfer bandwidths. We formally define and address the associated problem, the Bulk Data Routing and Transfer(BDRT) and present a linear programming-based solution to it, optimal in both routing and time domains. We additionally explore alternative approaches based on heuristic routing strategies, both oblivious and time-domain optimized. We evaluate these solutions via both PlanetLab trace-driven simulations and Internet transfer experiments, on the Intrigger wide-area grid and PlanetLab. Evaluation shows that our approach finds optimal solutions, based on estimations of job arrival times, deadlines and transfer volumes. Index Terms—congestion minimization, deadline-driven transfers, routing overlays, Internet I. INTRODUCTION
Published: 2009

43. SARA: A Session Aware Infrastructure for High Performance Next Generation Cluster-based Servers

Author: D. Barbaron, Pascale Vicat-Blanc Primet, Laurent Lefèvre, N. Ayari, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Orange Labs [Lannion], France Télécom, École normale supérieure de Lyon (ENS de Lyon), Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), École normale supérieure - Lyon (ENS Lyon), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: Voice over IP, Computer science, business.industry, 020206 networking & telecommunications, 02 engineering and technology, Internet traffic, Load balancing (computing), Load management, Network Load Balancing Services, Server, Next-generation network, 0202 electrical engineering, electronic engineering, information engineering, The Internet, [INFO.INFO-DC]Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], business, Computer network
Abstract: International audience; Internet server clustering has been widely used by operators to improve the scalability and the availability of the rendered services under heavy load condition. Load balancing is a well known mean to optimize the usage of the cluster available resources by fairly allocating them to the offered network traffic. Most state-of-the-art research advocate either session oblivious or coarse grained session aware load balancing architectures. While guaranteeing session integrity, the coarse grained session awareness leads to an unfair allocation of the cluster resources. In this work, we advocate an innovative fine grained session aware load balancing architecture of an offered IP traffic to a cluster of Internet servers. The proposed architecture aims to maximize the cluster useful throughput in terms of completed sessions per unit of time. It provides high availability capabilities in case of failure of the legitimate entry point to the cluster. Finally, it is fully client transparent and is open to adapt to any multiple-flow based NGN service such as voice over IP or video streaming.
Published: 2007

44. Supporting Bulk Data Transfers of High-End Applications with Guaranteed Completion Time

Author: Pascale Vicat-Blanc Primet and Binbin Chen
Subjects: Integrated services, business.industry, Computer science, Distributed computing, Processor scheduling, Application software, computer.software_genre, Grid, Scheduling (computing), Grid computing, Resource management, business, computer, Data transmission, Computer network
Abstract: In high-end grid networks, distributed resources (scientific instruments, CPUs, storages, etc.) are interconnected to support computing-intensive and data-intensive applications, which often require reliable and efficient transfer of gigabits or even terabits of data among endpoints. To facilitate the efficient scheduling of endpoint resources, networks should provide a service which guarantees that a specified amount of data is transferred within a strict time window. Existing "FixRate-FixTime" resource reservation architectures such as IntServ/RSVP reserve for each flow a constant amount of resource from a specified starting time. Instead, a bulk data transfer can start at any time after its arrival, use any and even time variant bandwidth value, as long as it is completed before its deadline. This paper proposes a flexible "Multi-Interval" resource reservation approach, which divides the active window of a transfer into multiple sub-intervals, and reserves constant amount of resource in each of them. We identify a possible evolution path towards the proposed architecture, and use simulations to demonstrate the potential performance gain from increasing flexibility.
Published: 2007

45. Session awareness issues for next generation cluster based network load balancing frameworks

Author: D. Barbaron, Laurent Lefèvre, N. Ayari, and Pascale Vicat-Blanc Primet
Subjects: Load management, business.industry, Computer science, Distributed computing, Scalability, GRASP, Next-generation network, Deep packet inspection, Network Load Balancing, Load balancing (computing), business, Network address translation, Computer network
Abstract: While a lot of researches focused on how to efficiently spread the offered network load on the available cluster resources, less interest has been granted to the impact of the used mechanisms on the reliable execution of the upper layer services. On the other hand, emerging NGN services as well as some of the already familiar services involve multiple flows during the lifespan of a single end- to-end session, hence, raising the challenge of session awareness while processing the incoming network traffic. In this paper, we grasp the need for fine grained session awareness to efficiently allocate the cluster resources to the offered network traffic. The analysis of load balancing scenarios of some representative IP services provides us with solid reasons to use deep packet inspection to achieve fine grained network traffic load distribution, and to meet NAT and firewall traversal constraints as well.
Published: 2007

46. T2CP-AR: A system for Transparent TCP Active Replication

Author: D. Barbaron, Laurent Lefèvre, Pascale Vicat-Blanc Primet, and N. Ayari
Subjects: TCP acceleration, business.industry, Computer science, Reliability (computer networking), Overhead (computing), Fault tolerance, The Internet, business, Host (network), Replication (computing), Failover, Computer network
Abstract: Today's Internet models are concerned with both of the quality and the availability of a given service. Current fault tolerant frameworks need to support consistent transport and application level failover mechanisms. Transport protocols relay on an explicit association between a service and its physical location for the wired Internet. Thus, when a host fails, the end-to-end flow terminates. In this paper, we propose an active replication based system which enhances the reliability of the already established TCP flows. The proposed scheme is client transparent. It does not incur any overhead to the end-to- end communication during failsafe periods, and performs well during failures.
Published: 2007

47. TCP Variants and Transfer Time Predictability in Very High Speed Networks

Author: Pascale Vicat-Blanc Primet, Sébastien Soudan, R. Guillier, Protocols and softwares for very high-performance network (RESO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure de Lyon (ENS de Lyon)-Centre National de la Recherche Scientifique (CNRS), This work has been funded by the French ministry of Education and Research via the IGTMD ANR grant, the ANR CIS HIPCAL project and the EC-GIN grant (IST 045256). Experiments presented in this report were carried out using the Grid'5000 experimental testbed, an initiative from the French Ministry of Research through the ACI GRID incentive action, INRIA, CNRS and RENATER and other contributing partners (see http://www.grid5000.fr), INRIA, Grid'5000, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'informatique du parallélisme, Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), and École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: transport protocol experimentation, computer.internet_protocol, Computer science, Distributed computing, Throughput, 02 engineering and technology, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Internet protocol suite, Network testbed, Gigabit, Transfer (computing), 0202 electrical engineering, electronic engineering, information engineering, Bandwidth (computing), Range (statistics), [INFO]Computer Science [cs], Predictability, Expérimentation de protocole de transport, Transferts en masse de données, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 020206 networking & telecommunications, bandwidth sharing, transfer delay predictability, bulk data transfers, 020201 artificial intelligence & image processing, Partage de bande passante, business, Prédiction de temps de transfert total, computer, Computer network
Abstract: In high performance distributed computing applications, data movements havedemanding performance requirements such as reliable and predictable delivery.Predicting the throughput of large transfers is very difficult in paths thatare heavily loaded with just a few big flows. This report explores how currenthigh speed transport protocols behave and may improve transfer time predictabilityof gigabits of data among endpoints in a range of conditions. In afully controlled long distance 10 Gbps network testbed, we compare severalTCP variants behaviour in presence of diverse congestion level and reversetraffic situations. We show that these factors have a very strong impact ontransfer time predictability of several transport protocols.; Dans les applications hautes performances de calcul distribué, les mouvements de données doivent fournir des garanties de performances, comme de la distribution fiable et prévisible. Prévoir le débit de larges transferts est difficile sur les chemins réseaux qui sont lourdement chargés par quelques gros flux.Ce rapport explore la façon dont les protocoles de transport haut débit se comportent et peuvent améliorer la prédictibilité des temps de transferts de gigaoctetsde données entre des nœuds d’extrémité dans un éventail de conditions.Dans un environnement de test complètement contrôlé avec un réseau longue distance à 10 Gbps, nous comparons le comportement de plusieurs variantes de TCP en présence de différents niveaux de congestion et trafic sur le chemin retour. Nous montrons que ces facteurs ont un impact très important sur la prédictibilité du temps de transfert pour plusieurs protocoles de transport.
Published: 2007

48. Topic 13 High-Performance Networks

Author: Tomohiro Kudoh, Pascale Vicat-Blanc Primet, Thilo Kielmann, and Bruce Lowekamp
Subjects: business.industry, Computer science, business, Telecommunications network, Computer network
Abstract: Communication networks are likely among the most crucial resources for parallel and distributed computer systems. The last couple of years has seen many significant technical improvements, ranging from advanced on-chip interconnects, via system and storage-area networks, up to dedicated, optical wide-area networks. While this technology push is bringing new opportunities, it also comes with many new research challenges.
Published: 2007

49. Grid coordination by using the grid coordination protocol

Author: Pascale Vicat-Blanc Primet, F. Bonnassieux, and R. Harakaly
Subjects: Context model, Grid network, business.industry, Computer science, Distributed computing, Testbed, Network topology, computer.software_genre, Grid, File server, Grid computing, Network performance, business, computer, Computer network
Abstract: In grids, many control subsystems are implemented by group of distributed agents that need to be coordinated and synchronised. In this paper we present a tool that implements a coordination protocol based on a generic, extensible and personalisable token passing protocol. We show how this tool performs different types of synchronisation tasks in a real Grid testbed. The Grid coordination protocol (GCP) is described, then its implementation, validation and usage, in the context of the European DataGrid project, are presented. We illustrate how GCP is used for network performance measurement coordination, for monitoring equipment configuration synchronisation and also for Grid network topology discovery operations.
Published: 2004

50. Flexible and Dynamic Control of Network QoS in Grid environments: the QoSINUS approach

Author: F. Chanussot, Johan Montagnat, Pascale Vicat-Blanc Primet, Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe MODALIS, Scalable and Pervasive softwARe and Knowledge Systems (Laboratoire I3S - SPARKS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Montagnat, Johan, Centre National de la Recherche Scientifique (CNRS)-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Université Nice Sophia Antipolis (... - 2019) (UNS), and COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS)
Subjects: Service (systems architecture), Interconnection, Computer science, business.industry, Distributed computing, Quality of service, Testbed, Context (language use), XX, computer.software_genre, Grid, Grid computing, [INFO.INFO-DC] Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], [INFO.INFO-DC]Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], business, computer, Computer network
Abstract: International audience; Grids rely on a complex interconnection of IP domains that may exhibit changing performance characteristics and may offer different quality of service (QoS) facilities. We examine the case of a biomedical application distributed over a grid and show it may suffer from uncontrolled communication performance. Then we present the QoSINUS service that dynamically allocates the network resources to Grid flows in order to match their specific QoS requirements under different load conditions. The aim of this approach is to optimize the end to end performances the heterogeneous mix of grid flows get from the network to enhance the individual application's performance as well as the overall grid infrastructure performance and utilization level. The QoSINUS service is based on the programmable network approach that offers flexibility, evolutivity and enables dynamic adaptation to network load variations. Finally, results of QoSINUS experiments conducted in the context of the eToile french grid testbed based on the high speed and DiffServ capable research network infrastructure, VTHD, are presented.
Published: 2004

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