Результаты поиска по 'distributions':
Найдено статей: 243
  1. Iakushkin O.O., Degtyarev A.B., Shvemberger S.V.
    Decomposition of the modeling task of some objects of archeological research for processing in a distributed computer system
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 533-537

    Although each task of recreating artifacts is truly unique, the modeling process for façades, foundations and building elements can be parametrized. This paper is focused on a complex of the existing programming libraries and solutions that need to be united into a single computer system to solve such a task. An algorithm of generating 3D filling of objects under reconstruction is presented. The solution architecture necessary for the system's adaptation for a cloud environment is studied.

    Views (last year): 1. Citations: 2 (RSCI).
  2. Kholodkov K.I., Aleshin I.M.
    Exact calculation of a posteriori probability distribution with distributed computing systems
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 539-542

    We'd like to present a specific grid infrastructure and web application development and deployment. The purpose of infrastructure and web application is to solve particular geophysical problems that require heavy computational resources. Here we cover technology overview and connector framework internals. The connector framework links problem-specific routines with middleware in a manner that developer of application doesn't have to be aware of any particular grid software. That is, the web application built with this framework acts as an interface between the user 's web browser and Grid's (often very) own middleware.

    Our distributed computing system is built around Gridway metascheduler. The metascheduler is connected to TORQUE resource managers of virtual compute nodes that are being run atop of compute cluster utilizing the virtualization technology. Such approach offers several notable features that are unavailable to bare-metal compute clusters.

    The first application we've integrated with our framework is seismic anisotropic parameters determination by inversion of SKS and converted phases. We've used probabilistic approach to inverse problem solution based on a posteriory probability distribution function (APDF) formalism. To get the exact solution of the problem we have to compute the values of multidimensional function. Within our implementation we used brute-force APDF calculation on rectangular grid across parameter space.

    The result of computation is stored in relational DBMS and then represented in familiar human-readable form. Application provides several instruments to allow analysis of function's shape by computational results: maximum value distribution, 2D cross-sections of APDF, 2D marginals and a few other tools. During the tests we've run the application against both synthetic and observed data.

    Views (last year): 3.
  3. Kuklin E.Yu., Sozykin A.V., Bersenev A.Yu., Masich G.F.
    Distributed dCache-based storage system of UB RAS
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 559-563

    The approach to build territorial distributed storage system for high performance computing environment of UB RAS is presented. The storage system is based on the dCache middleware from the European Middleware Initiative project. The first milestone of distributed storage system implementation includes the data centers at the two UB RAS Regions: Yekaterinburg and Perm.

    Citations: 3 (RSCI).
  4. Sukhoroslov O.V., Rubtsov A.O., Volkov S.Yu.
    Development of distributed computing applications and services with Everest cloud platform
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 593-599

    The use of service-oriented approach in scientific domains can increase research productivity by enabling sharing, publication and reuse of computing applications, as well as automation of scientific workflows. Everest is a cloud platform that enables researchers with minimal skills to publish and use scientific applications as services. In contrast to existing solutions, Everest executes applications on external resources attached by users, implements flexible binding of resources to applications and supports programmatic access to the platform's functionality. The paper presents current state of the platform, recent developments and remaining challenges.

    Views (last year): 6. Citations: 2 (RSCI).
  5. Volkov S.Yu., Sukhoroslov O.V.
    Running Parameter Sweep applications on Everest cloud platform
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 601-606

    Parameter sweep applications are a very important class of applications, which are typically defined as a set of computational experiments over a set of input parameters, each of which is executed with its own parameter combination. These computations arise in many scientific contexts. This article introduces the Parameter Sweep web service that runs such applications in distributed computing environment. Also discussed is the Everest cloud platform, on which this service is built.

    Views (last year): 3.
  6. Berezhnaya A.Ya., Velikhov V.E., Lazin Y.A., Lyalin I.N., Ryabinkin E.A., Tkachenko I.A.
    The Tier-1 resource center at the National Research Centre “Kurchatov Institute” for the experiments, ALICE, ATLAS and LHCb at the Large Hadron Collider (LHC)
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 621-630

    The review of the distributed computing infrastructure of the Tier-1 sites for the Alice, ATLAS, LHCb experiments at the LHC is given. The special emphasis is placed on the main tasks and services of the Tier-1 site, which operates in the Kurchatov Institute in Moscow.

    Views (last year): 2.
  7. Bondyakov A.S.
    Basic directions of information technology in National Academy of Sciences of Azerbaijan
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 657-660

    Grid is a new type of computing infrastructure, is intensively developed in today world of information technologies. Grid provides global integration of information and computing resources. The essence Conception of GRID in Azerbaijan is to create a set of standardized services to provide a reliable, compatible, inexpensive and secure access to geographically distributed high-tech information and computing resources a separate computer, cluster and supercomputing centers, information storage, networks, scientific tools etc.

    Views (last year): 6. Citations: 1 (RSCI).
  8. Kazymov A.I., Kotov V.M., Mineev M.A., Russakovich N.A., Yakovlev A.V.
    Using CERN cloud technologies for the further ATLAS TDAQ software development and for its application for the remote sensing data processing in the space monitoring tasks
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 683-689

    The CERN cloud technologies (the CernVM project) give a new possibility for the software developers. The participation of the JINR ATLAS TDAQ working group in the software development for distributed data acquisition and processing system (TDAQ) of the ATLAS experiment (CERN) involves the work in the condition of the dynamically developing system and its infrastructure. The CERN cloud technologies, especially CernVM, provide the most effective access as to the TDAQ software as to the third-part software used in ATLAS. The access to the Scientific Linux environment is provided by CernVM virtual machines and the access software repository — by CernVM-FS. The problem of the functioning of the TDAQ middleware in the CernVM environment was studied in this work. The CernVM usage is illustrated on three examples: the development of the packages Event Dump and Webemon, and the adaptation of the data quality auto checking system of the ATLAS TDAQ (Data Quality Monitoring Framework) for the radar data assessment.

    Views (last year): 2.
  9. Oleynikov B.V., Shalabay A.I.
    Crowd funding in the construction of distributed grid-system of electronic library and internet resources
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 715-718

    In the design of a distributed library system, there are a lot of organizational problems, ideas, solutions which are the subject of this article. The article presents the approaches on crowd funding platforms that are used as a tool for attracting participants and financing project.

    Views (last year): 1.
  10. Smirnov S.A., Voloshinov V.V.
    Pre-decomposition of discrete optimization problems to speed up the branch and bound method in a distributed computing environment
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 719-725

    The paper presents an implementation of branch and bound algorithm employing coarse grained parallelism. The system is based on CBC (COIN-OR branch and cut) open-source MIP solver and inter-process communication capabilities of Erlang. Numerical results show noticeable speedup in comparison to single-threaded CBC instance.

    Views (last year): 2. Citations: 2 (RSCI).
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International Interdisciplinary Conference "Mathematics. Computing. Education"