Most viewed papers

531. Bogdanov A.V., P. Sone K. Ko, Zaya K.
     Performance of the OpenMP and MPI implementations on ultrasparc system
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 485-491

     This paper targets programmers and developers interested in utilizing parallel programming techniques to enhance application performance. The Oracle Solaris Studio software provides state-of-the-art optimizing and parallelizing compilers for C, C++ and Fortran, an advanced debugger, and optimized mathematical and performance libraries. Also included are an extremely powerful performance analysis tool for profiling serial and parallel applications, a thread analysis tool to detect data races and deadlock in memory parallel programs, and an Integrated Development Environment (IDE). The Oracle Message Passing Toolkit software provides the high-performance MPI libraries and associated run-time environment needed for message passing applications that can run on a single system or across multiple compute systems connected with high performance networking, including Gigabit Ethernet, 10 Gigabit Ethernet, InfiniBand and Myrinet. Examples of OpenMP and MPI are provided throughout the paper, including their usage via the Oracle Solaris Studio and Oracle Message Passing Toolkit products for development and deployment of both serial and parallel applications on SPARC and x86/x64 based systems. Throughout this paper it is demonstrated how to develop and deploy an application parallelized with OpenMP and/or MPI.

     Keywords: OpenMP, Parallel Programming, MPI (Message Passing Interface), SPARC System.
     Views (last year): 2.
532. Podryga V.O., Polyakov S.V.
     3D molecular dynamic simulation of thermodynamic equilibrium problem for heated nickel
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 573-579

     This work is devoted to molecular dynamic modeling of the thermal impact processes on the metal sample consisting of nickel atoms. For the solution of this problem, a continuous mathematical model on the basis of the classical Newton mechanics equations has been used; a numerical method based on the Verlet scheme has been chosen; a parallel algorithm has been offered, and its realization within the MPI and OpenMP technologies has been executed. By means of the developed parallel program, the investigation of thermodynamic equilibrium of nickel atoms’ system under the conditions of heating a sample to desired temperature has been executed. In numerical experiments both optimum parameters of calculation procedure and physical parameters of analyzed process have been defined. The obtained numerical results are well corresponding to known theoretical and experimental data.

     Keywords: molecular dynamic simulation, nickel, EAM, temperature, thermostat, Newton mechanics equations, parallel algorithm and program, MPI and OpenMP technologies.
     Views (last year): 2.
533. Yuzhanin N.V., Tipikin Yu.A., Gankevich I.G., Zolotarev V.I.
     Computational task tracking complex in the scientific project informational support system
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 615-620

     This work describes the idea of the system of informational support for the scientific projects and the development of computational task tracking complex. Due to large requirements for computational experiments the problem of presentation of the information about HPC tasks becomes one of the most important. Nonstandard usage of the service desk system as a basis of the computational task tracking and support system can be the solution of this problem. Particular attention is paid to the analysis and the satisfaction of the conflicting requirements to the task tracking complex from the different user groups. Besides the web service kit used for the integration of the task tracking complex and the datacenter environment is considered. This service kit became the main interconnect between the parts of the scientific project support system and also this kit allows to reconfigure the whole system quickly and safely.

     Keywords: service desk, task tracking, HPC, web service.
     Views (last year): 2. Citations: 1 (RSCI).
534. 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.

     Keywords: high-performance computing systems, mass storage distributed system, distributed data processing, grid.
     Views (last year): 2.
535. 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.

     Keywords: Cloud technologies, virtual machines, remote sensing data processing, ATLAS TDAQ, middleware.
     Views (last year): 2.
536. 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.

     Keywords: branch and bound algorithm, coarse grained parallelism.
     Views (last year): 2. Citations: 2 (RSCI).
537. Ustimenko O.V.
     Features DIRAC data management
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 741-744

     The report presents an analysis of Big Data storage solutions in different directions. The purpose of this paper is to introduce the technology of Big Data storage, prospects of storage technologies, for example, the software DIRAC. The DIRAC is a software framework for distributed computing.

     The report considers popular storage technologies and lists their limitations. The main problems are the storage of large data, the lack of quality in the processing, scalability, the lack of rapid availability, the lack of implementation of intelligent data retrieval.

     Experimental computing tasks demand a wide range of requirements in terms of CPU usage, data access or memory consumption and unstable profile of resource use for a certain period. The DIRAC Data Management System (DMS), together with the DIRAC Storage Management System (SMS) provides the necessary functionality to execute and control all the activities related with data.

     Keywords: Distributed storage systems, Big Data, software framework, Data transfer service, Data Management System.
     Views (last year): 2.
538. Bogdanov A.V., Mareev V.V., Stepanov E.A., Panchenko M.V.
     Modeling of behavior of the option. The formulation of the problem
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 759-766

     Object of research: The creation of algorithm for mass computations of options‘ price for formation of a riskless portfolio. The method is based on the generalization of the Black–Scholes method. The task is the modeling of behavior of all options and tools for their insurance. This task is characterized by large volume of realtime complex computations that should be executed concurrently The problem of the research: depending on conditions approaches to the solution should be various. There are three methods which can be used with different conditions: the finite difference method, the path-integral approach and methods which work in conditions of trade stop. Distributed computating in these three cases is organized differently and it is necessary to involve various approaches. In addition to complexity the mathematical formulation of the problem in literature is not quite correct. There is no complete description of boundary and initial conditions and also several hypotheses of the model do not correspond to real market. It is necessary to give mathematically correct formulation of the task, and to neutralize a difference between hypotheses of the model and their prototypes in the market. For this purpose it is necessary to expand standard formulation by additional methods and develop methods of realization for each of solution branches.

     Keywords: financial mathematics, options pricing, asian option, wellposedness formulation, boundary conditions.
     Views (last year): 2. Citations: 1 (RSCI).
539. Grid’2014
     Computer Research and Modeling, 2015, v. 7, no. 3 p.
     Views (last year): 2.
540. Chujko S.M., Nesmelova (Starkova) O.V., Sysoev D.V.
     Nonlinear boudary value problem in the case of parametric resonance
     Computer Research and Modeling, 2015, v. 7, no. 4, pp. 821-833

     We construct necessary and sufficient conditions for the existence of solution of seminonlinear matrix boundary value problem for a parametric excitation system of ordinary differential equations. The convergent iteration algorithms for the construction of the solutions of the semi-nonlinear matrix boundary value problem for a parametric excitation system differential equations in the critical case have been found. Using the convergent iteration algorithms we expand solution of seminonlinear periodical boundary value problem for a parametric excitation Riccati type equation in the neighborhood of the generating solution. Estimates for the value of residual of the solutions of the seminonlinear periodical boundary value problem for a parametric excitation Riccati type equation are found.

     Keywords: seminonlinear boundary value problem, matrix differential equations, generalized Green’s operator, parametric excitation.
     Views (last year): 2.

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