CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] Databases and applications in a distributed GRID environment Authors:Authors: Juan González Juan González Claudio Mendoza Claudio Mendoza Tim Kallman Tim Kallman Michael Witthoeft Michael Witthoeft Javier García Javier García

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] Introduction Content summary The weaknesses Narrow scope Hard to update and maintain A solution approach GRID infrastructure Virtualized UI SQL based data structure Difficulties Benefits Atomic Data (VAMDC) (VAMDC) Astrophysics modeling application GRIDGRID

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] 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?

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] The Weaknesses 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 Narrow scope No web tool available Advanced computer skills required System-dependent installation XSTAR frontend XSTAR backend

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] A solution approach: gXSTAR GRID infrastructure 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 Xstar Web GENIUS GENIUS Online Users JDLJDL

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] A solution approach: Virtualized UI XSTAR all set to go! 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 XSTAR VM Download Site XSTAR VM Download Site Online Users Portable GRID UI JDLJDL

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] A solution approach: XSTARdb SQL based data structure with a web front end XSTARdbXSTARdb Input files ScriptsScripts XSTARdb Web Online Users 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

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] Difficulties Different types of input files and formats Huge amounts of data to process Errors within the files Duplicated information Functionalities extraction in bundled software Distribution of work load from sequential code schema gXSTAR XSTARdb

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] Benefits gXSTAR 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 Flexible search tools Widely available through the web and VOA More computing power (HPC)

CLCAR 2009 Universidad de los Andes (ULA), September 21st – 25th, 2009 Speaker: Speaker: Juan González [ ] Thank you! Thank you!