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Databases and applications in a distributed GRID environment

Databases and applications in a distributed GRID environment. Authors:. Juan González Claudio Mendoza Tim Kallman Michael Witthoeft Javier García. Content summary. Introduction. The weaknesses Narrow scope Hard to update and maintain. Atomic Data (VAMDC).

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Databases and applications in a distributed GRID environment

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  1. Databases and applications in a distributed GRID environment Authors: • Juan González • Claudio Mendoza • Tim Kallman • Michael Witthoeft • Javier García

  2. Content summary • Introduction • The weaknesses • Narrow scope • Hard to update and maintain Atomic Data (VAMDC) • A solution approach • GRID infrastructure • Virtualized UI • SQL based data structure • Difficulties GRID Astrophysics modeling application • Benefits

  3. Introduction • What is XSTAR? • Atomic data repositories and XSTARdb • Purpose of XSTARdb • Construct a self-consistent data set to use within XSTAR • Store atomic data with well-defined data types • Build tools to intelligently combine the datasets into a master set • Provide all these tools through the web • Integrate to VAMDC • How do we plan to do it?

  4. The Weaknesses XSTAR frontend • Narrow scope • No web tool available • Advanced computer skills required • System-dependent installation XSTAR backend • Hard to update and maintain • Ever growing sets of data files • Sequential modeling • Time consuming consistency and integrity checks • Manually modified files (error prone) • Lack of standards, conventions and inconsistent data model • Informal version control

  5. A solution approach: gXSTAR • GRID infrastructure Online Users JDL Xstar Web GENIUS • General considerations • The web site will be based on Genius grid portal or VM • Regular jobs will be used to run single XSTAR calculations • Parametric JDL will be used to run XSTAR models

  6. A solution approach: Virtualized UI • XSTAR all set to go! Online Users JDL XSTAR VM Download Site Portable GRID UI • General considerations • No installation/configuration of XSTAR needed • A VM execution software is required • After download, the user’s certificate should be installed in the VM

  7. A solution approach: XSTARdb • SQL based data structure with a web front end Input files Scripts Online Users XSTARdb Web XSTARdb • General considerations • The db structure must be able to describe the data it contains • Build a library of functions to act on the db • Atomic data to be inserted will come in a variety of formats • Being able to browse the database is essential (web and text based) • Integrated within VAMDC frontend

  8. Difficulties gXSTAR • Functionalities extraction in bundled software • Distribution of work load from sequential code schema XSTARdb • Different types of input files and formats • Huge amounts of data to process • Errors within the files • Duplicated information

  9. Benefits gXSTAR • Widely available through the web and VOA • More computing power (HPC) • Flexible search tools XSTARdb • Provides the user with an easier way to test new data • Provides a self-consistent data set to use within XSTAR and VAMDC • Makes it easier to update, maintain and port data

  10. Thank you!

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