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					 Advances in grid porting at UCV

Robinson Rivas, Jaime Parada, Daniel Espinoza, Esther González
        Centro de Computación Paralela y Distribuida
              Universidad Central de Venezuela
Agenda
   Introduction

   Grid UCV

   Applications
       Cativic
       Aires
       BRAMS

   EasyGrid.

   Conclusions and drawbacks

   Next steps
Grid UCV
   4 Sun Servers

   Scientific Linux 4.6

   gLite 3.1

   Two 8-nodes clusters.
UCV Platform
CATIVIC
   Developed by IVIC (Instituto Venezolano de Investigaciones Científicas).

   Used in Quantum Chemistry to solve and synthetize molecular interactions

   High performance required

   Parallel modules developed in OpenMPI
CATIVIC Porting to grid
   Work began at the EELA-2 GridSchool at Itacuruca (Jaime Parada, Edgar
    Perdomo) based on bash scripts (2008)

   Enhancement of such scripts (2008 - 2009)

   Web site developed (2009)
       Dynamic JDL
       Recopilation of all CATIVIC outputs
       Adding of an abstraction layer – easier for end users
Screens
Aires
   Software for particles modeling, developed by S. J. Sciutto, Physics
    Department, Universidad Nacional de la Plata (Argentina)

   Written entirely in FORTRAN.

   Intensive CPU usage for particle rain simulations
Screens
BRAMS
   BRAMS (Brazilian Regional Atmospheric Modeling System).

   Developed by a group of Brazilian institutions

   Meso-scale model- Both vertical and horizontal resolution are needed for
    weather forecasting
Web Interfaces: Aires and BRAMS
EasyGrid
   Interface problems lead us to create an easy web portal for our applications.
    In this case, users can avoid technical aspects, as security, command-line
    instructions and so on

   EasyGrid combines easy usage of Microsoft .NET GUI components, with
    Linux power at the back end
Architecture
Layers
EasyGrid Functions
   Tasks: users can configure task to be launched to Grid, check for status, add
    applications and new runs, and personalize both tasks descriptions and
    outputs

   Results can be directly downloaded in an easy way (yet gzipped)

   Each user can customize its preferences, such as applications and statistics
    of usage
Screens
Preliminary Conclusions
   Slow and hard gridization process, in part by middleware used

   Users resistance to migration – they prefer their home clusters!

   End users and developers interest groups growth too slow

   EasyGrid seems to be a good alternative for users. Performance and
    usability test not done yet
Drawbacks
   Platform is costly and hard to maintain without professional personnel

   Lack of strong groups of users and applications at UCV for HPC – more
    advertising is needed

   Small group at UCV for Grid development at CCPD – but with a big heart 
Future Works

   Porting of new applications, and development of a methodology that facilitates
    this



   Improvements of EasyGrid, specifically usability and performance test



   Join of UCV to national and international grid platforms, using CLARA facilities

				
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posted:8/24/2012
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