Desarrollo de un workflow genérico para el modelado de problemas de barrido paramétrico en sistemas distribuidos

• Autores: Sebastián Reyes Ávila
• Directores de la Tesis: Alfonso Niño Ramos (dir. tes.), Rosa M Badia (dir. tes.)
• Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2012
• Idioma: español
• Tribunal Calificador de la Tesis: Ignacio Blanquer Espert (presid.), Antonio Cortés Roselló (secret.), Isabel Campos Plasencia (voc.)
• Materias:
  • Ciencias tecnológicas
    • Tecnología de los ordenadores
      • Arquitectura de ordenadores
• Enlaces
  • Tesis en acceso abierto en: TDX
• Resumen

  • This work presents the development and experimental validation of a generic workflow model applicable to any parameter sweep problem: the Parameter Sweep Scientific Workflow (PSWF) model. As part of it, a model for the monitoring and management of scientific workflows on distributed systems is developed. This model, Star Superscalar Status (SsTAT), is applicable to the StarSs programming model family. PSWF and SsTAT can be used by the scientific community as a reference for solving problems using the parameter sweep strategy. As an integral part of the work, the treatment of the parameter sweep problem is formalized. This is achieved by developing a general solution based on the PSNSS (Parameter Sweep Nested Summation Symbol) algorithm, using both the original sequential and a concurrent approach. Both versions are implemented and validated, showing its applicability to all automatable PSWF lifecycle phases. Load testing shows that large-scale parameter sweep problems can efficiently be addressed with the proposed approach. In addition, the SsTAT monitoring and management generic model is instantiated for a Grid environment. Thus, an operational implementation of SsTAT based on GRIDSs, GSTAT (GRID Superscalar Status), is developed. A series of tests performed on an actual heterogeneous Grid of computers shows that GSTAT can appropriately develop their functionality even in an environment so demanding as that. As a practical case, the model proposed here is applied to determining the molecular potential energy hypersurfaces. For this purpose, a specific instance of the workflow, called PSHYP (Parameter Sweep Hypersurfaces), is created.